CN107204463A - A kind of based lithium-ion battery positive plate - Google Patents
A kind of based lithium-ion battery positive plate Download PDFInfo
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- CN107204463A CN107204463A CN201710456950.9A CN201710456950A CN107204463A CN 107204463 A CN107204463 A CN 107204463A CN 201710456950 A CN201710456950 A CN 201710456950A CN 107204463 A CN107204463 A CN 107204463A
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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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of based lithium-ion battery positive plate, it includes plus plate current-collecting body and the positive pole diaphragm being coated on plus plate current-collecting body, positive pole diaphragm includes positive active material, conductive agent and binding agent, and wherein positive active material is the mixture of LiFePO4, nickle cobalt lithium manganate and LiMn2O4.The based lithium-ion battery positive plate each component raw material has reached mutual supplement with each other's advantages, has cut down the good result of shortcoming, make obtained lithium ion battery that there is higher security and economy, and new material need not be prepared, simply each component material is carried out well mixed, reduce material cost, material safety is improved, is operated simpler.
Description
Technical field
The present invention relates to field of lithium ion battery, it is more particularly related to a kind of higher economical usability and peace
The based lithium-ion battery positive plate of full property.
Background technology
Currently, compared with ni-mh, nickel-cadmium cell, lithium ion battery is in 3C（Computer, communication, consumption electronic product）Field
Maintained the leading position with absolute predominance；Meanwhile, in order to adapt to energy-conserving and environment-protective requirement, electric car（Including electric bicycle and electronic
Automobile）With wide market prospects.As the power source of electric car, lithium ion battery has very big competitiveness.No matter
It is 3C consumer electronics fields or electric car application field, because the high request to power supply energy causes battery must be by certain side
Formula is used in parallel and serial.This battery cell of use requirement in groups of battery must have good uniformity.But,
Due to the difference of current battery manufacturing process, the limitation of equipment and raw material supplied materials performance, lithium ion battery is caused（It is especially high
Capacity batteries）Uniformity it is to be improved；In addition, battery is in groups in use, often because of placement location difference, the environment of radiating
It is not equal so that the actual performance capacity of battery difference.So battery be very easy to overcharge in actual use or
Cross and put, cause the potential safety hazard that battery is serious.
As the new positive electrode of a class, nickle cobalt lithium manganate possesses higher energy density, cheap price and good
Good cycle performance, nickle cobalt lithium manganate has become the competitive material of 3C Product and the automobile-used lithium ion battery of electrical salf-walking
Material.But, the conventional nickel-cobalt lithium manganate material of existing market（Such as：Nickel：Cobalt：Manganese=5:2:3、4：4：2 etc.）Because shared by nickel
Ratio is higher, and the layer structure that material is formed during manufacturing is not very complete.When battery makes, environmental Kuznets Curves are not tight or make
In the case of improperly, cycle performance decay that the structural imperfection of nickle cobalt lithium manganate is easily caused battery is big, security performance
Difference（Especially acupuncture, overcharge）Deng series of problems.In combo in use, the defect more notable, amplificationization.
In view of this, it is necessary to provide a kind of modification, with higher-security can nickle cobalt lithium manganate cylindrical lithium ion
Battery.
The content of the invention
The technical problems to be solved by the invention overcome the deficiencies in the prior art to have higher-security there is provided a kind of
Based lithium-ion battery positive plate.
To achieve the above object, the technical solution adopted by the present invention is：A kind of based lithium-ion battery positive plate, including positive pole collection
Fluid and the positive pole diaphragm being coated on plus plate current-collecting body, positive pole diaphragm include positive active material, conductive agent and binding agent, its
Middle positive active material is the mixture of LiFePO4, nickle cobalt lithium manganate and LiMn2O4.
The weight of the positive active material, conductive agent and binding agent is respectively 93~94 parts, 3.8~4.5 parts
With 2.6~3.0 parts.
The weight of the nickle cobalt lithium manganate, LiFePO4 and LiMn2O4 be 60~98 parts, 1~20 part, 1~20
Part.
The conductive agent is at least one of carbon black, the carbon fiber of vapor phase growth, superconduction carbon black and electrically conductive graphite.
The binding agent is polyvinylidene fluoride（PVDF）.
The particle diameter of the LiFePO4 is 1~3 micron, and the particle diameter of nickle cobalt lithium manganate and LiMn2O4 is 10~14 microns.
Relative to existing nickle cobalt lithium manganate battery technology, contain nickel cobalt manganese in the positive plate of lithium ion battery of the present invention
Sour lithium, LiMn2O4 and LiFePO4；Nickle cobalt lithium manganate has higher gram specific capacity, nominal platform voltage 3.7V.But, the material
The structural imperfection of material be easily caused gained battery heat endurance is poor, anti-over-charging poor performance, be especially embodied in its poor
Acupuncture performance is almost into the problem of industry；LiFePO4 Stability Analysis of Structures, heat endurance is good, and security performance is excellent, has the disadvantage to put down
Platform voltage and tap density ratio are relatively low；LiMn2O4 ore resources relatively enrich, and cheap, platform voltage is up to 3.8V, security
Excellent, the overcharging resisting superior performance of energy, has the disadvantage that gram volume is low, and the gram volume of such as high temperature modification LiMn2O4 is only 100~105mAh/g.
Therefore, the present invention proposes to mix the excellent LiFePO4 of nickle cobalt lithium manganate and security performance and LiMn2O4, prepares modified version
High security nickel-cobalt lithium manganate cathode material.In the positive electrode of gained, high voltage composition（That is LiMn2O4）Presence have and be beneficial to
The raising of mixing material charging/discharging voltage platform and by the less LiFePO4 of particle diameter（D50：1~3 micron）It is larger with particle diameter
Nickle cobalt lithium manganate and LiMn2O4（D50：10~14 microns）As different quality than mixing can improve obtained by mixing material
Tap density, is conducive to the raising of battery capacity.And then, LiFePO4 and the relatively low cost of LiMn2O4 have established mixing of the present invention
The higher economic usability of positive electrode.
Nickle cobalt lithium manganate, LiFePO4, the combination property of the weight comparison resulting materials of LiMn2O4 are got in mixing material
Critical effect.On the one hand, nickle cobalt lithium manganate content is smaller（Such as, less than 60%）Blended anode material capacitance it is smaller；
On the other hand, if positive active material does not contain LiFePO4 and LiMn2O4 capacity is complementary, hold in the case of improper use
It is easily caused and overcharges, causes potential safety hazard.Because the active material in the positive plate of the present invention uses nickle cobalt lithium manganate, ferric phosphate
The mixture of lithium, LiMn2O4 so that the lithium ion battery has higher security and economic use value.
Beneficial effect of the present invention is：
LiFePO4 and LiMn2O4 are added in nickel-cobalt lithium manganate material, mutual supplement with each other's advantages has been reached, cuts down the good result of shortcoming,
Make obtained lithium ion battery that there is higher security and economy；And new material need not be prepared, simply by above-mentioned three kinds
Material be well mixed, therefore reduces material cost compared with prior art, improves material safety, operation is more
Plus it is simple.
Embodiment
The based lithium-ion battery positive plate of the present invention, including plus plate current-collecting body and the cathode film being coated on plus plate current-collecting body
Piece, wherein positive pole diaphragm are made up of positive active material, conductive agent and binding agent, positive active material, conductive agent and binding agent
Weight be respectively 93~94 parts, 3.8~4.5 parts and 2.6~3.0 parts.The positive active material is by weight
Match the mixture being made up of 1~20 part of 60~98 parts of LiFePO4,1~20 part of nickle cobalt lithium manganate and LiMn2O4；The conduction
Agent can be at least one of carbon black, the carbon fiber of vapor phase growth, superconduction carbon black and electrically conductive graphite；The binding agent is poly- inclined two
PVF（PVDF）.The particle diameter of the LiFePO4 is 1~3 micron, and the particle diameter of nickle cobalt lithium manganate and LiMn2O4 is 10~14
Micron.
With reference to specific embodiment, the invention will be further described, and by the preparation of lithium battery to each positive plate side
The effect of case is done one and compared.
Comparative example
The preparation of positive plate：Using nickle cobalt lithium manganate as positive active material, its weight content（Relative to powder weight, with lower class
Together）For 94%；With polyvinylidene fluoride（PVDF）For binding agent, its weight content is 2.0%；Using carbon black and electrically conductive graphite as conduction
Agent, its weight content is respectively 3.0% and 1.0%.Above-mentioned material is stirred by dry-mixed mode, solvent methyl pyrrole is added
Omit alkanone（NMP）Stir and anode sizing agent is made.Anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil, drying compacting
Afterwards by cutting, anode ear is welded, high tempreture tape is sticked and positive plate is made.
The preparation of negative plate：Using Delanium as negative active core-shell material, its weight content is 94%；With hydroxymethyl cellulose
Sodium（CMC）For thickener, its weight content is 1.7%；With carbon black（S-P）For conductive agent, its weight content is respectively 2%.Will be upper
State material deionized water be stirring evenly and then adding into by dry-mixed mode and persistently stirred, it is uniform after add SBR emulsion
（SBR）（Weight content is 2.3 %）Stir and cathode size is made.Cathode size is uniformly coated on negative current collector copper foil
On, through cut-parts, welding negative lug after drying compacting, stick high tempreture tape and negative plate is made.
The preparation of barrier film：Using polyethene microporous membrane as barrier film.
The preparation of electrolyte：Using lithium hexafluoro phosphate as lithium salts, with propene carbonate（PC）, ethylene carbonate（EC）And carbonic acid
The mixture of dimethyl ester (DMC) is solvent, and the weight ratio of propene carbonate, ethylene carbonate and dimethyl carbonate is PC:EC:
DMC=1：1：1.By lithium hexafluoro phosphate after in the mixed solvent dissolving（Concentration is 1.0M）, add 1% electrolysis additive carbon
Sour vinylene (VC).
The preparation of lithium ion battery：After negative plate, positive plate, barrier film are sequentially overlapped made from previous process, pass through volume
Battery core is made in winding technologe, and battery core is transferred in battery packages shell, electrolyte is inwardly injected, and lithium ion is made after the processes such as chemical conversion
Battery.
Embodiment one
The preparation of positive plate：Being mixed into just with 20 parts of 60 parts of LiFePO4,20 parts of nickle cobalt lithium manganate and LiMn2O4 by weight
Pole active material, the particle diameter of the LiFePO4 is 1~3 micron, and the particle diameter of nickle cobalt lithium manganate and LiMn2O4 is 10~14 micro-
Rice；93 parts of positive active material is taken by weight ratio, takes polyvinylidene fluoride（PVDF）For 2.6 parts of binding agent, take carbon black and
Electrically conductive graphite is 3.8 parts of conductive agent, is stirred by dry-mixed mode, adds solvent methyl pyrrole and omits alkanone（NMP）Stirring is equal
It is even that anode sizing agent is made.Anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil by above-mentioned material, drying compacting after by
Cut, weld anode ear, stick high tempreture tape and positive plate is made.Wherein, carbon black and electrically conductive graphite weight content are respectively 3:1.
The preparation of negative plate：Using Delanium as negative active core-shell material, its weight content is 94%；With hydroxymethyl cellulose
Sodium（CMC）For thickener, its weight content is 1.7%；With carbon black（S-P）For conductive agent, its weight content is respectively 2%.Will be upper
State material deionized water be stirring evenly and then adding into by dry-mixed mode and persistently stirred, it is uniform after add SBR emulsion
（SBR）（Weight content is 2.3%）Stir and cathode size is made.Cathode size is uniformly coated on negative current collector copper foil
On, through cut-parts, welding negative lug after drying compacting, stick high tempreture tape and negative plate is made.
The preparation of barrier film：Using polyethene microporous membrane as barrier film.
The preparation of electrolyte：Using lithium hexafluoro phosphate as lithium salts, with propene carbonate（PC）, ethylene carbonate (EC) and carbonic acid
The mixture of dimethyl ester (DMC) is solvent, and the weight ratio of propene carbonate, ethylene carbonate and dimethyl carbonate is PC:EC:
DMC=1：1：1.By lithium hexafluoro phosphate after in the mixed solvent dissolving（Concentration is 1.0M）, add 1% electrolysis additive carbon
Sour vinylene (VC).
The preparation of lithium ion battery：After negative plate, positive plate, barrier film are sequentially overlapped made from previous process, pass through volume
Battery core is made in winding technologe, and battery core is transferred in battery packages shell, electrolyte is inwardly injected, and lithium ion is made after the processes such as chemical conversion
Battery.
Embodiment two
The preparation of positive plate：Being mixed into just with 10 parts of 70 parts of LiFePO4,10 parts of nickle cobalt lithium manganate and LiMn2O4 by weight
Pole active material, the particle diameter of the LiFePO4 is 1~3 micron, and the particle diameter of nickle cobalt lithium manganate and LiMn2O4 is 10~14 micro-
Rice；93.2 parts of positive active material is taken by weight ratio, takes polyvinylidene fluoride（PVDF）For 2.8 parts of binding agent, superconduction is taken
Carbon black and electrically conductive graphite are 4 parts of conductive agent, are stirred by dry-mixed mode, add solvent methyl pyrrole and omit alkanone（NMP）Stir
Mix and anode sizing agent uniformly is made.Anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil by above-mentioned material, after drying compacting
By cutting, anode ear is welded, high tempreture tape is sticked and positive plate is made.Wherein, superconduction carbon black and electrically conductive graphite weight content point
Wei 3:1.
The preparation of negative plate：Using Delanium as negative active core-shell material, its weight content is 94%；With hydroxymethyl cellulose
Sodium（CMC）For thickener, its weight content is 1.7%；With carbon black（S-P）For conductive agent, its weight content is respectively 2%.Will be upper
State material deionized water be stirring evenly and then adding into by dry-mixed mode and persistently stirred, it is uniform after add SBR emulsion
（SBR）（Weight content is 2.3%）Stir and cathode size is made.Cathode size is uniformly coated on negative current collector copper foil
On, through cut-parts, welding negative lug after drying compacting, stick high tempreture tape and negative plate is made.
The preparation of barrier film：Using polyethene microporous membrane as barrier film.
The preparation of electrolyte：Using lithium hexafluoro phosphate as lithium salts, with propene carbonate, ethylene carbonate and dimethyl carbonate
Mixture is solvent, and the weight ratio of propene carbonate, ethylene carbonate and dimethyl carbonate is 1：1：
By lithium hexafluoro phosphate after in the mixed solvent dissolving（Concentration is 1.0M）, add 1% the sub- second of electrolysis additive carbonic acid
Alkene ester (VC).
The preparation of lithium ion battery：After negative plate, positive plate, barrier film are sequentially overlapped made from previous process, pass through volume
Battery core is made in winding technologe, and battery core is transferred in battery packages shell, electrolyte is inwardly injected, and lithium ion is made after the processes such as chemical conversion
Battery.
Embodiment three
The preparation of positive plate：Positive pole is mixed into 15 parts of 80 parts of LiFePO4,15 parts of nickle cobalt lithium manganate and LiMn2O4 by weight
Active material, the particle diameter of the LiFePO4 is 1~3 micron, and the particle diameter of nickle cobalt lithium manganate and LiMn2O4 is 10~14 microns；
93.5 parts of positive active material is taken by weight ratio, takes polyvinylidene fluoride（PVDF）For 2.85 parts of binding agent, the carbon black is taken to be
4.2 parts of conductive agent, is stirred by dry-mixed mode, is added solvent methyl pyrrole and is omited alkanone（NMP）Stir and positive pole is made
Slurry.Anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil by above-mentioned material, by cutting after drying compacting, welding is just
Lug, sticks high tempreture tape and positive plate is made.
The preparation of negative plate：Using Delanium as negative active core-shell material, its weight content is 94%；With hydroxymethyl cellulose
Sodium（CMC）For thickener, its weight content is 1.7%；With carbon black（S-P）For conductive agent, its weight content is respectively 2%.Will be upper
State material deionized water is stirring evenly and then adding into by dry-mixed mode and persistently stirred；SBR emulsion is added after uniform
（SBR）（Weight content is 2.3 %）Stir and cathode size is made.Cathode size is uniformly coated on negative current collector copper foil
On, through cut-parts, welding negative lug after drying compacting, stick high tempreture tape and negative plate is made.
The preparation of barrier film：Using polyethene microporous membrane as barrier film.
The preparation of electrolyte：Using lithium hexafluoro phosphate as lithium salts, with propene carbonate, ethylene carbonate and dimethyl carbonate
Mixture is solvent, and the weight ratio of propene carbonate, ethylene carbonate and dimethyl carbonate is 1：1：
By lithium hexafluoro phosphate after in the mixed solvent dissolving（Concentration is 1.0M）, add 1% the sub- second of electrolysis additive carbonic acid
Alkene ester (VC).
The preparation of lithium ion battery：After negative plate, positive plate, barrier film are sequentially overlapped made from previous process, pass through volume
Battery core made from winding technologe, battery core is transferred in battery packages shell, electrolyte is inwardly injected, be made through chemical conversion etc. after process lithium from
Sub- battery.
Example IV
The preparation of positive plate：Positive pole is mixed into by weight with 1 part of 98 parts of LiFePO4,1 part of nickle cobalt lithium manganate and LiMn2O4 to live
Property material, the particle diameter of the LiFePO4 is 1~3 micron, and the particle diameter of nickle cobalt lithium manganate and LiMn2O4 is 10~14 microns；Press
Weight takes 94 parts of positive active material, takes polyvinylidene fluoride（PVDF）For 3.0 parts of binding agent, the carbon of vapor phase growth is taken
Fiber is 4.5 parts of conductive agent, is stirred by dry-mixed mode, adds solvent methyl pyrrole and omits alkanone（NMP）The system of stirring
Into anode sizing agent.Anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil by above-mentioned material, by cutting after drying compacting,
Anode ear is welded, high tempreture tape is sticked and positive plate is made.
The preparation of negative plate：Using Delanium as negative active core-shell material, its weight content is 94%；With hydroxymethyl cellulose
Sodium（CMC）For thickener, its weight content is 1.7%；With carbon black（S-P）For conductive agent, its weight content is respectively 2%.Will be upper
State material deionized water is stirring evenly and then adding into by dry-mixed mode and persistently stirred；SBR emulsion is added after uniform
（SBR）（Weight content is 2.3 %）Stir and cathode size is made.Cathode size is uniformly coated on negative current collector copper foil
On, through cut-parts, welding negative lug after drying compacting, stick high tempreture tape and negative plate is made.
The preparation of barrier film：Using polyethene microporous membrane as barrier film.
The preparation of electrolyte：Using lithium hexafluoro phosphate as lithium salts, with propene carbonate, ethylene carbonate and dimethyl carbonate
Mixture is solvent, and the weight ratio of propene carbonate, ethylene carbonate and dimethyl carbonate is 1：1：
By lithium hexafluoro phosphate after in the mixed solvent dissolving（Concentration is 1.0M）, add 1% the sub- second of electrolysis additive carbonic acid
Alkene ester (VC).
The preparation of lithium ion battery：After negative plate, positive plate, barrier film are sequentially overlapped made from previous process, pass through volume
Battery core made from winding technologe, battery core is transferred in battery packages shell, electrolyte is inwardly injected, be made through chemical conversion etc. after process lithium from
Sub- battery.
By the lithium ion battery of comparative example, embodiment one, embodiment two, embodiment three and example IV at 25 DEG C with
0.5C constant-current constant-voltage chargings are shelved 5 minutes to 4.2V, cut-off current 0.02C, with 0.5C constant-current discharges to 2.75V, shelve 5 points
Clock.Such loop test is after five weeks, and with 0.5C constant-current constant-voltage chargings to 4.2V, cut-off current 0.02C is shelved 24 hours, carries out
Safety test is compared.Each is tested with three batteries（3PCS）Carry out parallel testing.
It is as shown in the table, drawn by contrast to draw a conclusion：
It is single lithium battery made from pure nickel-cobalt lithium manganate cathode material described in comparative example, volume energy density is 560WH/L,
In security testing process, acupuncture 3PCS blast, it is on fire, overcharge（3C10V）1PCS passes through, 2PCS blasts, on fire, security performance ratio
It is poor.Nickel-cobalt lithium manganate cathode material doped iron lithium phosphate and LiMn2O4 described in example IV, ratio is 98:1:1, it is obtained
Single lithium battery volume energy density is 545 WH/L, and in security testing process, acupuncture 2PCS passes through, and 1PCS is on fire, blast,
Overcharge（3C10V）3PCS all passes through.Illustrate to be further improved security by doping, especially overcharging aspect.
Embodiment three, embodiment two, the volume energy density of embodiment one are respectively 540 WH/L, 540 WH/L and 530WH/L, are owned
Safety test all passes through.Described above, doped scheme not only maintains the advantage of nickle cobalt lithium manganate higher volumes energy density,
The safety issue of battery is fundamentally solved again, is a kind of simple to operate, higher improvement approach of cost performance.
Table one：
The present invention is not limited in embodiment disclosed and described above, all basic thoughts based on the present invention and entered
In row modification or the protection for belonging to the present invention changed are enclosed.
Claims (6)
1. a kind of based lithium-ion battery positive plate, including plus plate current-collecting body and the positive pole diaphragm being coated on plus plate current-collecting body, it is special
Levy and be：Positive pole diaphragm includes positive active material, conductive agent and binding agent, and wherein positive active material is LiFePO4, nickel
The mixture of cobalt manganic acid lithium and LiMn2O4.
2. based lithium-ion battery positive plate as claimed in claim 1, it is characterised in that：The positive active material, conductive agent and
The weight of binding agent is respectively 93~94 parts, 3.8~4.5 parts and 2.6~3.0 parts.
3. based lithium-ion battery positive plate as claimed in claim 1, it is characterised in that：The nickle cobalt lithium manganate, LiFePO4 and
The weight of LiMn2O4 is 60~98 parts, 1~20 part, 1~20 part.
4. based lithium-ion battery positive plate as claimed in claim 1, it is characterised in that：The conductive agent is carbon black, vapor phase growth
At least one of carbon fiber, superconduction carbon black and electrically conductive graphite.
5. based lithium-ion battery positive plate as claimed in claim 1, it is characterised in that：The binding agent is polyvinylidene fluoride
（PVDF）.
6. based lithium-ion battery positive plate as claimed in claim 1, it is characterised in that：The particle diameter of the LiFePO4 is 1~3 micro-
The particle diameter of rice, nickle cobalt lithium manganate and LiMn2O4 is 10~14 microns.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108206287A (en) * | 2017-12-30 | 2018-06-26 | 惠州Tcl金能电池有限公司 | Battery pole piece and lithium ion battery |
| CN108232174A (en) * | 2018-01-31 | 2018-06-29 | 北京国能电池科技股份有限公司 | Positive electrode active materials, lithium ion battery and preparation method thereof |
| CN109546109A (en) * | 2018-11-12 | 2019-03-29 | 合肥斯姆雷品牌管理有限公司 | A kind of high-temperature stable lithium battery anode |
| CN109638222A (en) * | 2018-12-11 | 2019-04-16 | 佛山市实达科技有限公司 | A kind of based lithium-ion battery positive plate of quickly-chargeable |
| CN110165146A (en) * | 2019-06-10 | 2019-08-23 | 河南福森新能源科技有限公司 | A kind of lithium ion battery and its anode sizing agent stirring means |
| CN110416490A (en) * | 2019-07-27 | 2019-11-05 | 珠海冠宇电池有限公司 | A kind of based lithium-ion battery positive plate that can provide dual security protection for taking into account energy density |
| CN111584836A (en) * | 2020-04-30 | 2020-08-25 | 汉腾新能源汽车科技有限公司 | Lithium ion battery anode and preparation process thereof |
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| CN108206287A (en) * | 2017-12-30 | 2018-06-26 | 惠州Tcl金能电池有限公司 | Battery pole piece and lithium ion battery |
| CN108232174A (en) * | 2018-01-31 | 2018-06-29 | 北京国能电池科技股份有限公司 | Positive electrode active materials, lithium ion battery and preparation method thereof |
| CN109546109B (en) * | 2018-11-12 | 2021-09-24 | 安徽金昆泰电子科技有限公司 | High-temperature stable lithium battery anode |
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| CN109638222A (en) * | 2018-12-11 | 2019-04-16 | 佛山市实达科技有限公司 | A kind of based lithium-ion battery positive plate of quickly-chargeable |
| CN110165146A (en) * | 2019-06-10 | 2019-08-23 | 河南福森新能源科技有限公司 | A kind of lithium ion battery and its anode sizing agent stirring means |
| CN110416490A (en) * | 2019-07-27 | 2019-11-05 | 珠海冠宇电池有限公司 | A kind of based lithium-ion battery positive plate that can provide dual security protection for taking into account energy density |
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| CN111883771A (en) * | 2020-09-14 | 2020-11-03 | 天津斯科兰德科技有限公司 | Lithium ion battery positive electrode material, positive plate and lithium ion battery |
| CN112885996A (en) * | 2021-04-13 | 2021-06-01 | 江苏力泰锂能科技有限公司 | Positive electrode active material, preparation method thereof, positive electrode and lithium ion battery |
| CN112885996B (en) * | 2021-04-13 | 2022-07-12 | 江苏力泰锂能科技有限公司 | Positive electrode active material, preparation method thereof, positive electrode and lithium ion battery |
| CN113422000A (en) * | 2021-06-21 | 2021-09-21 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113839097A (en) * | 2021-08-24 | 2021-12-24 | 浙江超恒动力科技有限公司 | Preparation method of electric bicycle battery |
| CN113839097B (en) * | 2021-08-24 | 2023-10-24 | 浙江超恒动力科技有限公司 | Preparation method of electric bicycle battery |
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Application publication date: 20170926 |