CN106684436A - Preparation method of high-safety performance lithium-ion battery - Google Patents
Preparation method of high-safety performance lithium-ion battery Download PDFInfo
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- CN106684436A CN106684436A CN201710021521.9A CN201710021521A CN106684436A CN 106684436 A CN106684436 A CN 106684436A CN 201710021521 A CN201710021521 A CN 201710021521A CN 106684436 A CN106684436 A CN 106684436A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
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- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a preparation method of a high-safety performance lithium-ion battery. The method comprises the following steps of adopting zinc oxide-coated lithium cobalt oxide as a positive electrode material, mixing the positive electrode material, a conductive agent, a binder and deionized water into slurry and coating a current collector to prepare a positive plate; adopting lithium titanate coated with a mixture of titanium oxide and silicon oxide as a negative electrode material and then mixing the negative electrode material, the binder, the conductive agent and the deionized water into slurry and coating the current collector to prepare a negative plate; adopting a prepared zirconia-reinforced aluminum oxide porous ceramic membrane as the membrane; and finally assembling the lithium-ion battery. The battery prepared by the method is good in high temperature resistance, excellent in cycling stability, high in energy density, safe and environment-friendly.
Description
Technical field：
The present invention relates to field of batteries, is specifically related to a kind of preparation method of the lithium ion battery of high safety performance.
Background technology：
Since 21 century, traditional fossil energy faces the problem of seriously polluted and increasingly depleted, finds cleanliness without any pollution
New forms of energy into focus of concern.The free of contamination regenerative resource such as solar energy, wind energy is required for being converted into electricity at present
Can use, but these energy all have that energy density is low, discontinuous, be the seriality for ensureing energy resource supply,
The extensive electric energy storage device for needing development to be adapted to therewith, builds " electrical storage " system.Secondary cell is used as simple efficient energy
Amount storage and feedway, are the optimal of current power reserve, and take on important in utilizing with popularization in the development of new forms of energy
Role.
In existing secondary cell system, with the secondary cell such as traditional lead-acid accumulator, nickel-cadmium cell, nickel-hydrogen cell
Compare, due to high with monomer battery voltage, light weight, memory-less effect, pollution-free self discharge are little, the circulation longevity for lithium ion battery
The advantages of ordering long, it is considered to be most potential battery.But from the point of view of current state of development, the core of lithium ion battery
Heart technology is still rested in the developed country such as Japan, Korea, U.S. handss.The high-energy-density of China's independent intellectual property right, Gao An
The lithium ion battery of full performance, especially the share shared by the high-power electric appliance Battery Market such as electric automobile is then fairly limited.
Therefore, especially high-performance lithium ion battery technology has important meaning for lifting China international competitiveness to develop lithium ion battery
Justice.
The content of the invention：
It is an object of the invention to provide a kind of preparation method of the lithium ion battery of high safety performance, lithium obtained in the method
Ion battery heat stability is good, and cyclical stability is excellent, and energy density is big.
For achieving the above object, the present invention is employed the following technical solutions：
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1-2h is stirred in 40-60 DEG C of water bath with thermostatic control, be obtained saturating
Bright solution；Triethanolamine is added in clear solution, is continued stirring 1-3.3h, is obtained zinc colloidal sol；Cobalt acid lithium is added to into zinc molten
In glue, continue stirring to the solvent completely removed in colloidal sol, then dry at 85-160 DEG C, be finally placed in Muffle furnace first
400-500 DEG C is warming up to the heating rate of 2-5 DEG C/min, constant temperature 10-30min, then with the heating rate of 6-10 DEG C/min
520-630 DEG C is warming up to, constant temperature 1-2h is finally warming up to 640-800 DEG C with the heating rate of 5-7 DEG C/min, constant temperature 30-
80min, after calcining terminates, cools to room temperature with the furnace, obtains positive electrode；
By positive electrode, conductive agent, binding agent mixing and stirring, it is then slowly added into deionized water and continues stirring 3-
6h, obtains anode sizing agent, and anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive plate；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 10-30min under 500W after completion of dropping,
Mixed solution is transferred in there-necked flask, back flow reaction 1-4h at 70-90 DEG C, is cooled to room temperature, finally by there-necked flask
Reactant liquor is transferred in autoclave, and at 150-180 DEG C, isothermal reaction 10-20h, reaction are cooled to room temperature, 3000- after terminating
It is centrifuged under 5000rpm, precipitation uses dehydrated alcohol, deionized water wash to neutrality successively, is dried, obtains negative material；
By negative material, conductive agent, binding agent mixing and stirring, it is then slowly added into deionized water and continues stirring 3-
6h, obtains cathode size, and cathode size is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 20-40min under 500-1000W, then
Continue stirring 10-40min under 2000-5000rpm, obtain mixed slurry；Then citric acid or ammonia is used to adjust mixed slurry
PH；Sodium carboxymethyl cellulose, shitosan are added in mixed slurry, is uniformly mixed, in the stirring of 1000-3000rpm
Stirring foaming 10-40min under rotating speed, obtains foamed slurry, and injection molding is dried on gypsum by foamed slurry, obtains base substrate；
Base substrate is sintered at 1300-1650 DEG C, porous ceramicss barrier film is obtained；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
8-23h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery.
Used as the preferred of above-mentioned technical proposal, the binding agent is poly- fluorocarbons, polyethylene glycol oxide, polyamide, poly-
One kind in acid imide, sodium carboxymethyl cellulose-butadiene-styrene rubber, sodium alginate.
As the preferred of above-mentioned technical proposal, in step (1), Zn in the clear solution2+Molar concentration be 0.1-
1.3mol/L, triethanolamine and Zn2+Mol ratio be (0.3-1.1)：1.
As the preferred of above-mentioned technical proposal, the conductive agent be graphite, conductive acetylene, white carbon black, in CNT one
Kind.
It is as the preferred of above-mentioned technical proposal, in step (2), the lithium titanate, hexamethylene, triethylamine, glacial acetic acid, anhydrous
Ethanol, tetraethyl orthosilicate, the amount ratio of butyl titanate are (0.5-1.6g)：50ml：10ml：20ml：20ml：(0.5-
1.2ml)：(1-2ml).
As the preferred of above-mentioned technical proposal, in step (3), in the mixed slurry, zirconium oxide, aluminium oxide, titanium dioxide
The content of silica sol granule is respectively 2-15.8wt%, 5-35wt%, 0.15-0.63wt%.
As the preferred of above-mentioned technical proposal, a kind of lithium ion battery of high safety performance as claimed in claim 1
Preparation method, it is characterised in that in step (3), the zirconium oxide, aluminium oxide size be 30-100nm, silicon dioxide
Sol particle size is 10-25nm.
As the preferred of above-mentioned technical proposal, in step (3), sodium carboxymethyl cellulose, shitosan in the foamed slurry
Content be respectively 2-6wt%, 1.5-4.7wt%.
As the preferred of above-mentioned technical proposal, in step (3), the heating rate during sintering is 3-8 DEG C/min.
Used as the preferred of above-mentioned technical proposal, the electrolyte is in parts by weight by 5-7 part 2- perfluorophenyl imidazoles, 3-6
Part 2- perfluorophenyl pyrroles, 10-40 part ethylene carbonates, 2-3 parts lithium hexafluoro phosphate composition.
The invention has the advantages that：
On the one hand, using the alumina porous ceramic of Zirconium oxide plasticizing as barrier film, its heat stability is good for the present invention, machinery
Intensity is big, and electrochemical stability is good, can effectively improve the security performance of lithium ion battery；
On the other hand, the present invention adopts titanium dioxide, the lithium titanate of coated with silica as negative material, its electric conductivity
Can be good, capacity density is big, it is ensured that the high rate performance of lithium ion battery；For positive electrode, the present invention adopts oxide coated by zinc
Cobalt acid lithium, its good reversibility has extended cycle life, and charge-discharge performance is good；
Cycle performance of lithium ion battery obtained in of the invention is excellent, and resistance to elevated temperatures is good, and energy density is big, safety and environmental protection,
Preparation cost is low, is suitable to large-scale production.
Specific embodiment：
In order to be better understood from the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solution
The present invention is released, any restriction will not be constituted to the present invention.
Embodiment 1
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 2h is stirred in 40 DEG C of waters bath with thermostatic control, be obtained transparent molten
Liquid；Triethanolamine is added in clear solution, is continued stirring 1h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol, is continued
Stir to the solvent completely removed in colloidal sol, then dry at 85 DEG C, be finally placed in Muffle furnace first with the liter of 2 DEG C/min
To 400 DEG C, then constant temperature 30min is warming up to 520 DEG C with the heating rate of 6 DEG C/min to warm ramp, constant temperature 2h, finally with 5
DEG C/heating rate of min is warming up to 640 DEG C, constant temperature 80min, after calcining terminates, cools to room temperature with the furnace, obtains positive electrode；
Wherein, Zn in clear solution2+Molar concentration be 0.1mol/L, triethanolamine and Zn2+Mol ratio be 0.3：1；
By positive electrode, graphite, poly- fluorocarbons mixing and stirring, it is then slowly added into deionized water and continues stirring
3h, obtains anode sizing agent, and anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive plate；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 10min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 4h at 70 DEG C, is cooled to room temperature, is finally shifted the reactant liquor in there-necked flask
Into autoclave, at 150 DEG C, isothermal reaction 20h, reaction are cooled to room temperature after terminating, and are centrifuged under 3000rpm, and precipitation is used successively
Dehydrated alcohol, deionized water wash are dried, obtain negative material to neutrality；Wherein, lithium titanate, hexamethylene, triethylamine, ice vinegar
Acid, dehydrated alcohol, tetraethyl orthosilicate, the amount ratio of butyl titanate are 0.5g：50ml：10ml：20ml：20ml：0.5ml：
1ml；
By negative material, graphite, poly- fluorocarbons mixing and stirring, it is then slowly added into deionized water and continues stirring
3h, obtains cathode size, and cathode size is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 40min under 500W, then in 2000rpm
It is lower to continue stirring 40min, obtain mixed slurry；Then citric acid or ammonia is used to adjust the pH of mixed slurry；To in mixed slurry
Sodium carboxymethyl cellulose, shitosan are added, is uniformly mixed, stirring foaming 40min, obtains under the speed of agitator of 1000rpm
To foamed slurry, and by foamed slurry, injection molding is dried on gypsum, obtains base substrate；By base substrate in Muffle furnace, with 3 DEG C/min
Heating rate be warming up to 1300 DEG C sintering 3h, obtain porous ceramicss barrier film；
Wherein, in mixed slurry, zirconium oxide, aluminium oxide, silica sol particles content be respectively 2wt%,
5wt%, 0.15wt%；In foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 2wt%, 1.5wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
8h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is in parts by weight by 5 parts of 2- perfluor benzene
Base imidazoles, 3 parts of 2- perfluorophenyl pyrroles, 10 parts of ethylene carbonates, 2 parts of lithium hexafluoro phosphate compositions.
Embodiment 2
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1.8h is stirred in 45 DEG C of waters bath with thermostatic control, be obtained transparent
Solution；Triethanolamine is added in clear solution, is continued stirring 1.5h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol,
Continue stirring to the solvent completely removed in colloidal sol, then dry at 95 DEG C, be finally placed in Muffle furnace first with 3 DEG C/min
Heating rate be warming up to 420 DEG C, then constant temperature 25min is warming up to 540 DEG C with the heating rate of 7 DEG C/min, constant temperature 1.8h,
Finally 680 DEG C are warming up to the heating rate of 5.5 DEG C/min, constant temperature 70min, after calcining terminates, cools to room temperature with the furnace, obtains
Positive electrode；Wherein, Zn in clear solution2+Molar concentration be 0.15mol/L, triethanolamine and Zn2+Mol ratio be 0.5：
1；
By positive electrode, conductive acetylene, polyamide mixing and stirring, it is then slowly added into deionized water and continues stirring
4h, obtains anode sizing agent, and anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive plate；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 15min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 3h at 75 DEG C, is cooled to room temperature, is finally shifted the reactant liquor in there-necked flask
Into autoclave, at 160 DEG C, isothermal reaction 16h, reaction are cooled to room temperature after terminating, and are centrifuged under 3500rpm, and precipitation is used successively
Dehydrated alcohol, deionized water wash are dried, obtain negative material to neutrality；Wherein, lithium titanate, hexamethylene, triethylamine, ice vinegar
Acid, dehydrated alcohol, tetraethyl orthosilicate, the amount ratio of butyl titanate are 0.9g：50ml：10ml：20ml：20ml：0.7ml：
1.6ml；
By negative material, conductive acetylene, polyamide mixing and stirring, it is then slowly added into deionized water and continues stirring
4h, obtains cathode size, and cathode size is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 35min under 600W, then in 3000rpm
It is lower to continue stirring 30min, obtain mixed slurry；Then citric acid or ammonia is used to adjust the pH of mixed slurry；To in mixed slurry
Sodium carboxymethyl cellulose, shitosan are added, is uniformly mixed, stirring foaming 30min, obtains under the speed of agitator of 1500rpm
To foamed slurry, and by foamed slurry, injection molding is dried on gypsum, obtains base substrate；By base substrate in Muffle furnace, with 4 DEG C/min
Heating rate be warming up to 1400 DEG C sintering 2.5h, obtain porous ceramicss barrier film；
Wherein, in mixed slurry, zirconium oxide, aluminium oxide, silica sol particles content be respectively 6wt%,
10wt%, 0.27wt%；In foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 3wt%, 2.2wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
10h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is complete by 5.5 parts of 2- in parts by weight
Fluorophenyl imidazoles, 4 parts of 2- perfluorophenyl pyrroles, 20 parts of ethylene carbonates, 2.2 parts of lithium hexafluoro phosphate compositions.
Embodiment 3
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1.6h is stirred in 50 DEG C of waters bath with thermostatic control, be obtained transparent
Solution；Triethanolamine is added in clear solution, is continued stirring 2h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol, after
It is continuous to stir to the solvent completely removed in colloidal sol, then dry at 110 DEG C, be finally placed in Muffle furnace first with 4 DEG C/min
Heating rate be warming up to 440 DEG C, then constant temperature 20min is warming up to 560 DEG C with the heating rate of 8 DEG C/min, constant temperature 1.6h,
Finally 710 DEG C are warming up to the heating rate of 6 DEG C/min, constant temperature 60min, after calcining terminates, cools to room temperature with the furnace, just obtains
Pole material；Wherein, Zn in clear solution2+Molar concentration be 0.2mol/L, triethanolamine and Zn2+Mol ratio be 0.7：1；
By positive electrode, white carbon black, sodium carboxymethyl cellulose-butadiene-styrene rubber mixing and stirring, be then slowly added into from
Sub- water continues stirring 5h, obtains anode sizing agent, and anode sizing agent is coated on collection liquid surface, vacuum dried, roll-in, cuts
To positive plate；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 20min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 2h at 80 DEG C, is cooled to room temperature, is finally shifted the reactant liquor in there-necked flask
Into autoclave, at 170 DEG C, isothermal reaction 14h, reaction are cooled to room temperature after terminating, and are centrifuged under 4000rpm, and precipitation is used successively
Dehydrated alcohol, deionized water wash are dried, obtain negative material to neutrality；Wherein, lithium titanate, hexamethylene, triethylamine, ice vinegar
Acid, dehydrated alcohol, tetraethyl orthosilicate, the amount ratio of butyl titanate are 1.2g：50ml：10ml：20ml：20ml：0.9ml：
1.4ml；
By negative material, white carbon black, sodium carboxymethyl cellulose-butadiene-styrene rubber mixing and stirring, be then slowly added into from
Sub- water continues stirring 5h, obtains cathode size, and cathode size is coated on collection liquid surface, vacuum dried, roll-in, cuts
To negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 30min under 700W, then in 4000rpm
It is lower to continue stirring 20min, obtain mixed slurry；Then citric acid or ammonia is used to adjust the pH of mixed slurry；To in mixed slurry
Sodium carboxymethyl cellulose, shitosan are added, is uniformly mixed, stirring foaming 30min, obtains under the speed of agitator of 2000rpm
To foamed slurry, and by foamed slurry, injection molding is dried on gypsum, obtains base substrate；By base substrate in Muffle furnace, with 6 DEG C/min
Heating rate be warming up to 1500 DEG C sintering 2h, obtain porous ceramicss barrier film；
Wherein, in mixed slurry, zirconium oxide, aluminium oxide, silica sol particles content be respectively 10.3wt%,
20.5wt%, 0.44wt%；In foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 4wt%, 2.8wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
15h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is in parts by weight by 6 parts of 2- perfluors
Phenylimidazole, 5 parts of 2- perfluorophenyl pyrroles, 30 parts of ethylene carbonates, 2.4 parts of lithium hexafluoro phosphate compositions.
Embodiment 4
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1.4h is stirred in 55 DEG C of waters bath with thermostatic control, be obtained transparent
Solution；Triethanolamine is added in clear solution, is continued stirring 3h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol, after
It is continuous to stir to the solvent completely removed in colloidal sol, then dry at 140 DEG C, be finally placed in Muffle furnace first with 4 DEG C/min
Heating rate be warming up to 480 DEG C, then constant temperature 15min is warming up to 610 DEG C with the heating rate of 9 DEG C/min, constant temperature 1.4h,
Finally 760 DEG C are warming up to the heating rate of 6.5 DEG C/min, constant temperature 60min, after calcining terminates, cools to room temperature with the furnace, obtains
Positive electrode；Wherein, Zn in clear solution2+Molar concentration be 0.25mol/L, triethanolamine and Zn2+Mol ratio be 0.9：
1；
By positive electrode, CNT, sodium alginate mixing and stirring, it is then slowly added into deionized water and continues stirring
5h, obtains anode sizing agent, and anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive plate；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 25min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 3.5h at 85 DEG C, is cooled to room temperature, is finally turned the reactant liquor in there-necked flask
Move in autoclave, at 170 DEG C, isothermal reaction 18h, reaction are cooled to room temperature after terminating, and are centrifuged under 4500rpm, and precipitation is successively
With dehydrated alcohol, deionized water wash to neutrality, it is dried, obtains negative material；Wherein, lithium titanate, hexamethylene, triethylamine, ice
Acetic acid, dehydrated alcohol, tetraethyl orthosilicate, the amount ratio of butyl titanate are 1.3g：50ml：10ml：20ml：20ml：
1.1ml：1.6ml；
By negative material, CNT, sodium alginate mixing and stirring, it is then slowly added into deionized water and continues stirring
5.5h, obtains cathode size, and cathode size is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 35min under 800W, then in 4500rpm
It is lower to continue stirring 35min, obtain mixed slurry；Then citric acid or ammonia is used to adjust the pH of mixed slurry；To in mixed slurry
Sodium carboxymethyl cellulose, shitosan are added, is uniformly mixed, stirring foaming 20min, obtains under the speed of agitator of 2500rpm
To foamed slurry, and by foamed slurry, injection molding is dried on gypsum, obtains base substrate；By base substrate in Muffle furnace, with 7 DEG C/min
Heating rate be warming up to 1600 DEG C sintering 2.5h, obtain porous ceramicss barrier film；
Wherein, in mixed slurry, zirconium oxide, aluminium oxide, silica sol particles content be respectively 12.7wt%,
25wt%, 0.49wt%；In foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 5wt%, 3.8wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
20h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is complete by 6.5 parts of 2- in parts by weight
Fluorophenyl imidazoles, 5 parts of 2- perfluorophenyl pyrroles, 35 parts of ethylene carbonates, 2.6 parts of lithium hexafluoro phosphates.
Embodiment 5
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1h is stirred in 60 DEG C of waters bath with thermostatic control, be obtained transparent molten
Liquid；Triethanolamine is added in clear solution, is continued stirring 3.3h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol, after
It is continuous to stir to the solvent completely removed in colloidal sol, then dry at 160 DEG C, be finally placed in Muffle furnace first with 5 DEG C/min
Heating rate be warming up to 500 DEG C, then constant temperature 10min is warming up to 630 DEG C with the heating rate of 10 DEG C/min, constant temperature 1h, most
800 DEG C are warming up to the heating rate of 7 DEG C/min afterwards, constant temperature 30min, after calcining terminates, cools to room temperature with the furnace, obtains positive pole
Material；Wherein, Zn in clear solution2+Molar concentration be 1.3mol/L, triethanolamine and Zn2+Mol ratio be 1.1：1；
By positive electrode, CNT, poly- fluorocarbons mixing and stirring, deionized water continuation is then slowly added into
Stirring 6h, obtains anode sizing agent, anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive pole
Piece；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 30min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 1h at 90 DEG C, is cooled to room temperature, is finally shifted the reactant liquor in there-necked flask
Into autoclave, at 180 DEG C, isothermal reaction 10h, reaction are cooled to room temperature after terminating, and are centrifuged under 5000rpm, and precipitation is used successively
Dehydrated alcohol, deionized water wash are dried, obtain negative material to neutrality；Wherein, lithium titanate, hexamethylene, triethylamine, ice vinegar
Acid, dehydrated alcohol, tetraethyl orthosilicate, the amount ratio of butyl titanate are 1.6g：50ml：10ml：20ml：20ml：1.2ml：
2ml；
By negative material, CNT, poly- fluorocarbons mixing and stirring, deionized water continuation is then slowly added into
Stirring 6h, obtains cathode size, cathode size is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain negative pole
Piece；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 20min, Ran Hou under 1000W
Continue stirring 10min under 5000rpm, obtain mixed slurry；Then citric acid or ammonia is used to adjust the pH of mixed slurry；To mixing
Sodium carboxymethyl cellulose, shitosan are added in slurry, is uniformly mixed, the stirring foaming under the speed of agitator of 3000rpm
10min, obtains foamed slurry, and injection molding is dried on gypsum by foamed slurry, obtains base substrate；By base substrate in Muffle furnace,
1650 DEG C of sintering 1h are warming up to the heating rate of 8 DEG C/min, porous ceramicss barrier film is obtained；
Wherein, in mixed slurry, zirconium oxide, aluminium oxide, silica sol particles content be respectively 15.8wt%,
35wt%, 0.63wt%；In foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 6wt%, 4.7wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
23h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is in parts by weight by 7 parts of 2- perfluors
Phenylimidazole, 6 parts of 2- perfluorophenyl pyrroles, 40 parts of ethylene carbonates, 3 parts of lithium hexafluoro phosphates.
Comparative example 1
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1h is stirred in 60 DEG C of waters bath with thermostatic control, be obtained transparent molten
Liquid；Triethanolamine is added in clear solution, is continued stirring 3.3h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol, after
It is continuous to stir to the solvent completely removed in colloidal sol, then dry at 160 DEG C, be finally placed in Muffle furnace first with 5 DEG C/min
Heating rate be warming up to 500 DEG C, then constant temperature 10min is warming up to 630 DEG C with the heating rate of 10 DEG C/min, constant temperature 1h, most
800 DEG C are warming up to the heating rate of 7 DEG C/min afterwards, constant temperature 30min, after calcining terminates, cools to room temperature with the furnace, obtains positive pole
Material；Wherein, Zn in clear solution2+Molar concentration be 1.3mol/L, triethanolamine and Zn2+Mol ratio be 1.1：1；
By positive electrode, CNT, poly- fluorocarbons mixing and stirring, deionized water continuation is then slowly added into
Stirring 6h, obtains anode sizing agent, anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive pole
Piece；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, then Deca is being just
Tetraethyl orthosilicate, continues Deca butyl titanate, closes beaker, then water bath sonicator 30min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 1h at 90 DEG C, is cooled to room temperature, is finally shifted the reactant liquor in there-necked flask
Into autoclave, at 180 DEG C, isothermal reaction 10h, reaction are cooled to room temperature after terminating, and are centrifuged under 5000rpm, and precipitation is used successively
Dehydrated alcohol, deionized water wash are dried, obtain negative material to neutrality；Wherein, lithium titanate, hexamethylene, triethylamine, ice vinegar
Acid, dehydrated alcohol, tetraethyl orthosilicate, the amount ratio of butyl titanate are 1.6g：50ml：10ml：20ml：20ml：1.2ml：
2ml；
By negative material, CNT, poly- fluorocarbons mixing and stirring, deionized water continuation is then slowly added into
Stirring 6h, obtains cathode size, cathode size is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain negative pole
Piece；
(3) preparation of barrier film：
First by aluminium oxide and sodium carboxymethyl cellulose, shitosan, deionized water mixing, stir, 3000rpm's
10min is stirred under speed of agitator, slurry is obtained, and injection molding is dried on gypsum by slurry, obtains base substrate；By base substrate in Muffle
In stove, 1650 DEG C of sintering 1h are warming up to the heating rate of 8 DEG C/min, ceramic diaphragm is obtained；
Wherein, in slurry, aluminium oxide, sodium carboxymethyl cellulose, shitosan content be respectively 35wt%, 6wt%,
4.7wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
23h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is in parts by weight by 7 parts of 2- perfluors
Phenylimidazole, 6 parts of 2- perfluorophenyl pyrroles, 40 parts of ethylene carbonates, 3 parts of lithium hexafluoro phosphates.
Comparative example 2
A kind of preparation method of the lithium ion battery of high safety performance, comprises the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1h is stirred in 60 DEG C of waters bath with thermostatic control, be obtained transparent molten
Liquid；Triethanolamine is added in clear solution, is continued stirring 3.3h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol, after
It is continuous to stir to the solvent completely removed in colloidal sol, then dry at 160 DEG C, be finally placed in Muffle furnace first with 5 DEG C/min
Heating rate be warming up to 500 DEG C, then constant temperature 10min is warming up to 630 DEG C with the heating rate of 10 DEG C/min, constant temperature 1h, most
800 DEG C are warming up to the heating rate of 7 DEG C/min afterwards, constant temperature 30min, after calcining terminates, cools to room temperature with the furnace, obtains positive pole
Material；Wherein, Zn in clear solution2+Molar concentration be 1.3mol/L, triethanolamine and Zn2+Mol ratio be 1.1：1；
By positive electrode, CNT, poly- fluorocarbons mixing and stirring, deionized water continuation is then slowly added into
Stirring 6h, obtains anode sizing agent, anode sizing agent is coated on collection liquid surface, and vacuum dried, roll-in, cutting obtain positive pole
Piece；
(2) preparation of negative plate：
By lithium titanate, CNT, poly- fluorocarbons mixing and stirring, it is then slowly added into deionized water and continues to stir
6h is mixed, cathode size is obtained, cathode size is coated on into collection liquid surface, vacuum dried, roll-in, cutting obtain negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 20min, Ran Hou under 1000W
Continue stirring 10min under 5000rpm, obtain mixed slurry；Then citric acid or ammonia is used to adjust the pH of mixed slurry；To mixing
Sodium carboxymethyl cellulose, shitosan are added in slurry, is uniformly mixed, the stirring foaming under the speed of agitator of 3000rpm
10min, obtains foamed slurry, and injection molding is dried on gypsum by foamed slurry, obtains base substrate；By base substrate in Muffle furnace,
1650 DEG C of sintering 1h are warming up to the heating rate of 8 DEG C/min, porous ceramicss barrier film is obtained；
Wherein, in mixed slurry, zirconium oxide, aluminium oxide, silica sol particles content be respectively 15.8wt%,
35wt%, 0.63wt%；In foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 6wt%, 4.7wt%；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into,
23h is placed, battery container is sealed after aerofluxuss, is obtained lithium ion battery；Wherein, electrolyte is in parts by weight by 7 parts of 2- perfluors
Phenylimidazole, 6 parts of 2- perfluorophenyl pyrroles, 40 parts of ethylene carbonates, 3 parts of lithium hexafluoro phosphates.
Jing is determined, and the lithium ion battery of embodiment 1-5 and comparative example 2 still normally can be used when environment is 90 DEG C, electricity
At the end of tank discharge, temperature is up to 200 DEG C；And the lithium ion battery of comparative example 1 environment be 40 DEG C when, service life is just significantly
Shorten；
When the lithium ion battery of embodiment 1-5 circulates 800 times, battery capacity is unchanged, and its cycle life is tested 4000 times,
Battery capacity conservation rate is more than 80%.And the lithium ion battery of comparative example 1-2 is circulated 800 times, battery capacity conservation rate is
93%, when circulating 4000 times, battery capacity conservation rate is only 69%.
Claims (10)
1. a kind of preparation method of the lithium ion battery of high safety performance, it is characterised in that comprise the following steps：
(1) preparation of positive plate：
By zinc acetate and dehydrated alcohol mixing and stirring, then 1-2h is stirred in 40-60 DEG C of water bath with thermostatic control, be obtained transparent molten
Liquid；Triethanolamine is added in clear solution, is continued stirring 1-3.3h, is obtained zinc colloidal sol；Cobalt acid lithium is added in zinc colloidal sol,
Continue stirring to the solvent completely removed in colloidal sol, then dry at 85-160 DEG C, be finally placed in Muffle furnace first with 2-5
DEG C/heating rate of min is warming up to 400-500 DEG C, then constant temperature 10-30min is warming up to the heating rate of 6-10 DEG C/min
520-630 DEG C, constant temperature 1-2h is finally warming up to 640-800 DEG C with the heating rate of 5-7 DEG C/min, constant temperature 30-80min, calcining
After end, room temperature is cooled to the furnace, obtain positive electrode；
By positive electrode, conductive agent, binding agent mixing and stirring, it is then slowly added into deionized water and continues stirring 3-6h, obtain
To anode sizing agent, anode sizing agent is coated on into collection liquid surface, vacuum dried, roll-in, cutting obtain positive plate；
(2) preparation of negative plate：
By lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol mixing and stirring in beaker, the then positive silicic acid of Deca
Tetra-ethyl ester, continues Deca butyl titanate, closes beaker, then water bath sonicator 10-30min under 500W after completion of dropping, mixing
Solution is transferred in there-necked flask, back flow reaction 1-4h at 70-90 DEG C, is cooled to room temperature, finally by the reaction in there-necked flask
Liquid is transferred in autoclave, and at 150-180 DEG C, isothermal reaction 10-20h, reaction are cooled to room temperature, 3000-5000rpm after terminating
Dehydrated alcohol, deionized water wash to neutrality are used in lower centrifugation, precipitation successively, are dried, are obtained negative material；
By negative material, conductive agent, binding agent mixing and stirring, it is then slowly added into deionized water and continues stirring 3-6h, obtain
To cathode size, cathode size is coated on into collection liquid surface, vacuum dried, roll-in, cutting obtain negative plate；
(3) preparation of barrier film：
First by zirconium oxide, aluminium oxide and Ludox mixing and stirring, ultrasound 20-40min, Ran Hou under 500-1000W
Continue stirring 10-40min under 2000-5000rpm, obtain mixed slurry；Then citric acid or ammonia is used to adjust mixed slurry
pH；Sodium carboxymethyl cellulose, shitosan are added in mixed slurry, is uniformly mixed, turned in the stirring of 1000-3000rpm
The lower stirring foaming 10-40min of speed, obtains foamed slurry, and injection molding is dried on gypsum by foamed slurry, obtains base substrate；Will
Base substrate is sintered at 1300-1650 DEG C, obtains porous ceramicss barrier film；
(4) assemble：
Positive plate, barrier film, negative plate are superimposed to form pole piece, are placed in battery container, be then injected into electrolyte, be melted into, placed
Battery container is sealed after aerofluxuss by 8-23h, obtains lithium ion battery.
2. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：It is described viscous
Knot agent is poly- fluorocarbons, polyethylene glycol oxide, polyamide, polyimides, sodium carboxymethyl cellulose-butadiene-styrene rubber, alginic acid
One kind in sodium.
3. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：Step
(1) in, Zn in the clear solution2+Molar concentration be 0.1-1.3mol/L, triethanolamine and Zn2+Mol ratio be (0.3-
1.1)：1.
4. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：It is described to lead
Electric agent is graphite, conductive acetylene, white carbon black, the one kind in CNT.
5. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：Step
(2) in, the lithium titanate, hexamethylene, triethylamine, glacial acetic acid, dehydrated alcohol, tetraethyl orthosilicate, the consumption of butyl titanate
Than for (0.5-1.6g)：50ml：10ml：20ml：20ml：(0.5-1.2ml)：(1-2ml).
6. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：Step
(3), in, in the mixed slurry, zirconium oxide, aluminium oxide, the content of silica sol particles are respectively 2-15.8wt%, 5-
35wt%, 0.15-0.63wt%.
7. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：Such as right
The preparation method of the lithium ion battery of a kind of high safety performance described in requirement 1, it is characterised in that in step (3), the oxidation
Zirconium, the size of aluminium oxide are 30-100nm, and silica sol particles size is 10-25nm.
8. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：Step
(3), in, in the foamed slurry, sodium carboxymethyl cellulose, the content of shitosan are respectively 2-6wt%, 1.5-4.7wt%.
9. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：Step
(3), in, the heating rate during sintering is 3-8 DEG C/min.
10. a kind of preparation method of the lithium ion battery of high safety performance as claimed in claim 1, it is characterised in that：It is described
Electrolyte in parts by weight by 5-7 part 2- perfluorophenyl imidazoles, 3-6 part 2- perfluorophenyl pyrroles, 10-40 part ethylene carbonates,
2-3 parts lithium hexafluoro phosphate is constituted.
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| CN114122318A (en) * | 2021-11-19 | 2022-03-01 | 湖北亿纬动力有限公司 | Negative pole piece and preparation method and application thereof |
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| CN114122318A (en) * | 2021-11-19 | 2022-03-01 | 湖北亿纬动力有限公司 | Negative pole piece and preparation method and application thereof |
| CN114907687A (en) * | 2022-05-27 | 2022-08-16 | 福州大学 | Silicon dioxide coated carbon nanotube reinforced nylon 12 composite material for MJR3D printing and preparation method and application thereof |
| CN114907687B (en) * | 2022-05-27 | 2023-03-31 | 福州大学 | Silicon dioxide coated carbon nanotube reinforced nylon 12 composite material for MJR3D printing and preparation method and application thereof |
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