CN107732158A - Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery - Google Patents
Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery Download PDFInfo
- Publication number
- CN107732158A CN107732158A CN201710797254.4A CN201710797254A CN107732158A CN 107732158 A CN107732158 A CN 107732158A CN 201710797254 A CN201710797254 A CN 201710797254A CN 107732158 A CN107732158 A CN 107732158A
- Authority
- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- preparation
- negative electrode
- lignin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
-
- 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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
-
- 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
-
- 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 preparation method of lithium ion battery negative electrode, comprise the following steps：S01：Lignin, polyethylene glycol oxide is taken uniformly to be mixed with dimethylformamide；S02：Nano silica fume is added in S01 in gained precursor solution, maintains temperature constant, is persistently stirred in heating process, stopped when to mixture viscosity being 2000 3000cp；S03：By the precursor solution obtained in S02 coated on negative current collector, then spontaneously dried in atmospheric environment；S04：The negative current collector obtained in S03 is sintered under inert atmosphere protection.The invention provides a kind of preparation method of new carbon coating silicon materials as lithium ion battery negative electrode, and new lithium ion battery negative electrode is obtained by the preparation method and includes the lithium ion battery of the cathode pole piece.The overall performance of lithium ion battery is improved so as to add cycle performance due to the structure using nano-silicon carbon coated using the lithium ion battery negative electrode that above-mentioned preparation method is prepared.
Description
Technical field
The invention belongs to technical field of lithium-ion battery, and in particular to a kind of preparation of lithium ion battery negative electrode
Method and the cathode pole piece prepared using the preparation method, further relate to a kind of lithium-ion electric for including the cathode pole piece
Pond.
Background technology
Because lithium ion battery has the advantages that energy density is high, self discharge is relatively low, does not have memory effect, therefore removable
There are huge application prospect and extensive demand in terms of dynamic electronic equipment, electric automobile and extensive energy storage.Lithium-ion electric
Include anode pole piece and cathode pole piece in pond, be coated with the anode pole piece and cathode pole piece by binding agent, conductive agent and
Electrode active material mixes preparation-obtained electrocondution slurry in certain proportion.In conventional art, lithium ion battery uses more
Active material of the graphite as negative pole, but the theoretical specific capacity of graphite is relatively low, only 372 mAh/g, it is difficult to meet market day
The requirement to battery capacity that benefit increases.Developing new negative material system becomes the trend of a certainty.
Silicon is because possessing high theoretical specific capacity（4200 mAh/g）, relatively low lithium reaction potential, wide material sources the advantages that
And become material that is of greatest concern in negative material of new generation and most having application prospect.But silicon has in charge and discharge process
There is great volume change（>300%）, so as to can cause the efflorescence of silicon active material negative pole, rupture and reduce the appearance of battery
Amount, this efflorescence, rupture can cause new SEI（Solid electrolyte interphase, i.e. solid electrolyte film）'s
Generate and constantly consume recyclable lithium, so that the cycle efficieny of battery declines.In order to solve, silicium cathode is inherent to be lacked
Fall into, Recent study person have carried out improvement many times for the negative active core-shell material of silicon substrate, to lift silicon-based anode activity
The stability of material, wherein silicon materials are carried out with carbon coating and compound is proved to be presently the most effective method, on the one hand, carbon
Cladding can protect silicon face to prevent its excessive contact with electrolyte and reduce SEI generation.On the other hand, carbon is more soft
And abundance, it can be good at absorbing the Volume Changes in silicon materials cyclic process.The graphite carbon ratio related in structure compared with
It is soft, there is extraordinary electric conductivity, quality is small, is characterised by that the Volume Changes during charge/discharge are small.It is former for these
Cause, situation as is known, carbon based negative electrodes have extraordinary electrochemical stability.By the way that the advantages of both elements, is incorporated in
Together（Si has big capacity, and C has high stability）, Si/C base electrodes active material is in the capacity with raising
In the case of also there is the cycle characteristics more more stable than pure silicon.
Application No. 201710052050.8 is entitled《A kind of carbon-coated nano silicon composite and preparation method thereof》In
A kind of core shell structure powder using nano-silicon particle as content, using carbon as shell is provided in state's patent and is used as lithium ion battery
Negative material, the use of pitch is the preparation method that carbon coating presoma carries out carbon coating to silicon in the program.This method can be with
The cycle performance of silicon is improved, but process is complex, and the pitch carbon matrix precursor used is mainly refined from oil and coal, for not
Regenerative resource.Because traditional electrode preparation process is more complicated, while introduces the binding agent for not storing up lithium activity, this will lead
Cause the loss of electrode capacity.Compared to traditional handicraft, grown directly in copper foil current collector and do not need the active material of binding agent to answer
Structure is closed, the technological process of electrode preparation can be reduced and increase the capacity of electrode.Such as Application No. 20151070849.8
For《A kind of lithium ion battery negative material and preparation method of binder free and conductive agent》Disclosed in patent of invention a kind of straight
The binder free and the preparation method of the cell negative electrode material of conductive agent being connected in foamed nickel current collector.This binder free is born
Pole preparation method can simplification of flowsheet, but the Na being prepared3VO4/ Ni is not significant compared to graphite or silicon materials
Performance boost.
The content of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of new carbon coating silicon materials as lithium from
The preparation method of sub- negative pole piece of battery, and by the preparation method obtain new lithium ion battery negative electrode and comprising
There is the lithium ion battery of the cathode pole piece.Provided in the present invention one kind using nano-silicon particle as active material, be heat-treated
The preparation side of the lithium ion battery negative electrode of lignin afterwards while the clad structure as silicon materials surface and structural framing
Method.Using the lithium ion battery negative electrode that above-mentioned preparation method is prepared because the structure using nano-silicon carbon coated is so as to increasing
Add cycle performance, improve the overall performance of lithium ion battery.
The technique effect of the invention to be reached is realized by following scheme：
The preparation method of the lithium ion battery negative electrode provided in the present invention, comprises the following steps：
S01：The preparation of precursor solution：Lignin, polyethylene glycol oxide is taken uniformly to be mixed with dimethylformamide, wherein wooden
Element, the mass ratio of polyethylene glycol oxide and dimethylformamide are（150-250）：1:（1800-2200）, above-mentioned mixed liquor is heated
To 50-70 DEG C, 1-2 hours are stirred；
S02：Add nano silica fume：Nano silica fume is added to the nano-silicon silty in gained precursor solution, added in S01
The mass ratio of amount and lignin is 1:（0.9-1.5）；Maintain temperature constant, be persistently stirred in heating process, to mixture
Viscosity stops when being 2000-3000cp；
S03：Dry：By the precursor solution obtained in S02 coated on negative current collector, then done naturally in atmospheric environment
Dry 4-8 hours；
S04：Sintering：The negative current collector obtained in S03 is sintered into 1-2 under inert atmosphere protection at a temperature of 500-600 DEG C
Hour, obtain required lithium-ion negative pole pole piece.
In the present invention, compared with prior art, due to adding polyethylene glycol oxide to increase complicated viscosity, i.e., due to poly-
The hydrogen bond action of ethylene oxide and lignin, heat up in carbonisation, lignin liquor preferably can keep it to be coated on silicon
The pattern on surface and finally obtain homogeneous cladding.The increase of complicated viscosity also causes the combination electrode in dimethylacetamide simultaneously
Amine solvent keeps its silicon to be dispersed in the ability in lignin during volatilizing, and the layering for reducing silicon grain in mixed liquor is sunk
Form sediment, finally obtained more excellent silicon grain capacity utilization and cycle performance.And the present invention method in using
The forming method of single step, i.e., directly apply to carry out in copper foil aluminium foil surface and complete to be sintered again, reduce the complex process of preparation
Degree.
Further, in S01, the lignin be hydrolytic lignin, sulfate-reducing conditions, sulfonate lignin,
One or more kinds of combination in Alcell lignin, acetic acid lignin.Wherein sulfate-reducing conditions property is the most stable, cheap
It is easy to get, is used as preferred feedstock.
Further, in S01, the polyethylene glycol oxide relative molecular mass is 5.0 × 105-1.0×106.In above-mentioned phase
The viscosity in preparation process can either be ensured the polyethylene glycol oxide in molecular weight ranges, nano silica fume and lignin is formed surely
Fixed homogeneous phase, and can enough vapor away in limiting time in the drying process, do not influence follow-up sintering process.
Further, in S02, in S02, magnetic agitation is persistently carried out to precursor solution and nano silica fume mixture, often
Stirring 20-30 minutes change planetary mixer stirring 5-8 minutes.
Further, in S02, nano silica fume particle size range is 30-150nm.When nano silicon particles particle diameter is more than 150nm
When, easy efflorescence is broken to be dissipated, and particle is excessive is unfavorable in the solution scattered.Particle is too small, improves cost of material, it is difficult to
Applied to large-scale industrial production.
Further, in S03, the negative current collector is copper foil or applies carbon copper foil.
A kind of lithium ion battery negative electrode is also provided in the present invention, the cathode pole piece preparation method is as described above.
A kind of lithium ion battery is also provided in the present invention, the cathode pole piece used in the lithium ion battery is as described above.
Further, the lithium ion battery is button cell；Metal lithium sheet is used as to electrode, Celgard films be every
Film, 1mol/L LiPF6/EC+DEC, the electrolyte of 10wt% FEC additives, wherein EC are 1 with DEC volume ratios:1.
Further, the lithium ion battery is under test voltage 0.005-1.2V, 0.1A/g multiplying power test condition, first week
Reversible capacity is more than 3000mAh/g, and efficiency is more than 80% first；Capacity is more than 2000mAh/g, capability retention after circulation in 100 weeks
More than 80%.
The present invention has advantages below：
1st, provided in the present invention a kind of using nano-silicon particle as active material, using the lignin after heat treatment while be used as silicon
The preparation method of the clad structure of material surface and the lithium ion battery negative electrode of structural framing.Use above-mentioned preparation method system
For the lithium ion battery negative electrode gone out because the structure using nano-silicon carbon coated is so as to add cycle performance, lithium is improved
The overall performance of ion battery.
2nd, the present invention used in carbon coating presoma source be lignin, be it is a kind of extensively derive from fabric can be again
Raw organic matter, it is not only cheap and easily-available and green.
3rd, lignin of the basic structure framework in the present invention on lithium ion battery negative electrode after heat treatment, its
Traditional binding agent and conductive agent are instead of on the premise of with certain storage lithium ability, and simplifies the technique stream of electrode preparation
Journey.Using the forming method of single step in the method for the present invention, i.e., directly apply to carry out in copper foil surface and complete to be sintered again,
Reduce the complex process degree of preparation.
4th, the lithium ion battery in the present invention has excellent electrochemistry cycle performance.
Brief description of the drawings
Fig. 1 is the SEM figures on lithium ion battery negative electrode surface in the present invention；
Fig. 2 is that another lithium ion battery tests the first to five obtained circle in the present invention（Include first circle）Charging and discharging curve
（2-a）And cycle performance figure（2-b）.
Embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
1st, the preparation of lithium ion battery negative electrode
Lithium ion battery negative electrode is prepared according to following three groups.
First group：
The preparation process of lithium ion battery negative electrode is as follows：
S01：The preparation of precursor solution：Lignin, polyethylene glycol oxide and dimethylformamide and equal are taken according to formula in upper table
Even mixing, above-mentioned mixed liquor is heated to 60 DEG C, stirred 1 hour.
S02：Nano silica fume is added in S01 in gained precursor solution, the nano silica fume quality added with it is wooden
The mass ratio of element is 1:1；Maintain temperature constant, magnetic agitation is persistently carried out to precursor solution and nano silica fume mixture, often
Stir half an hour and change planetary mixer stirring 5 minutes.Nano silica fume particle diameter used in the step is 80nm.
S03：The precursor solution obtained in S02 is coated on negative current collector copper foil, then in atmospheric environment certainly
So dry 6 hours.
S04：The negative current collector copper foil obtained in S03 is sintered 1.5 hours under argon gas atmosphere protection, obtains required lithium
Ion cathode pole piece.
Second group：
The preparation process of lithium ion battery negative electrode is as follows：
S01：The preparation of precursor solution：Lignin, polyethylene glycol oxide and dimethylformamide and equal are taken according to formula in upper table
Even mixing, above-mentioned mixed liquor is heated to 50 DEG C, stirred 1 hour.
S02：Nano silica fume is added in S01 in gained precursor solution, the nano silica fume quality added with it is wooden
The mass ratio of element is 1:0.9；Maintain temperature constant, magnetic agitation persistently carried out to precursor solution and nano silica fume mixture,
Often stir half an hour and change planetary mixer stirring 5 minutes.Nano silica fume particle diameter used in the step is 30nm.
S03：The precursor solution obtained in S02 is coated on negative current collector copper foil, then in atmospheric environment certainly
So dry 4 hours.
S04：The negative current collector copper foil obtained in S03 sinter 2 hours under argon gas atmosphere protection, obtain required lithium from
Sub- cathode pole piece.
3rd group：
The preparation process of lithium ion battery negative electrode is as follows：
S01：The preparation of precursor solution：Lignin, polyethylene glycol oxide and dimethylformamide and equal are taken according to formula in upper table
Even mixing, above-mentioned mixed liquor is heated to 70 DEG C, stirred 1 hour.
S02：Nano silica fume is added in S01 in gained precursor solution, the nano silica fume quality added with it is wooden
The mass ratio of element is 1:1.5；Maintain temperature constant, magnetic agitation persistently carried out to precursor solution and nano silica fume mixture,
Often stir half an hour and change planetary mixer stirring 5 minutes.Nano silica fume particle diameter used in the step is 150nm.
S03：The precursor solution obtained in S02 is coated on negative current collector copper foil, then in atmospheric environment certainly
So dry 8 hours.
S04：The negative current collector copper foil obtained in S03 sinter 2 hours under argon gas atmosphere protection, obtain required lithium from
Sub- cathode pole piece.
2nd, the preparation of lithium ion battery
Obtained silicon compound electric pole piece is cut into a diameter of 12mm electrode slice directly as negative plate, vacuum is done under 120C
Dry 12h, metal lithium sheet is then used as to electrode, Celgard films are barrier film, 1mol/L LiPF6/EC+DEC, 10wt% FEC
The electrolyte of additive, wherein EC are 1 with DEC volume ratios:1, the assembling composition CR2025 type knobs in the glove box of argon gas protection
Detain battery.
3rd, test
The lithium ion battery being prepared is used into Biologic（VMP-3）Battery test system carry out constant-current charge electric discharge with
And loop test, test voltage 0.005-1.2V.Under 0.1A/g multiplying powers button point test condition, embodiment test result is as follows
Table.To be contrasted, the comparative example used is with lithium ion battery made of same preparation method, wherein comparative example 1,3,5
As negative material, comparative example 2,4,6 it is nano-silicon as negative material for graphite, the negative pole of phase same material is used in each group
Material is as a comparison case.
First group of test result：
As shown in drawings, Fig. 1 is the SEM figures on lithium battery cathode pole piece surface obtained in embodiment 1.Fig. 2 is in embodiment 3
Lithium ion battery tests the first to five obtained circle（Include first circle）Charging and discharging curve（2-a）And cycle performance figure
（2-b）.
Second group of test result：
3rd group of test result：
Understood in test process, the influence of lignin, polyethylene glycol oxide and dimethylformamide mass ratio to final result is simultaneously
Less, as long as in the range of the mass ratio provided in the present invention.In the case of other conditions identical, using with high phase
Lignin and lifting heat treatment temperature to molecular mass help to lift the performance of cathode pole piece to a certain extent.The present invention
In, compared with prior art, due to adding polyethylene glycol oxide to increase complicated viscosity, i.e., due to polyethylene glycol oxide and lignin
Hydrogen bond action, in the carbonisation that heats up, lignin liquor can preferably keep it to be coated on the pattern of silicon face and last
Obtain homogeneous cladding.The increase of complicated viscosity also causes the process that the combination electrode volatilizees in dimethylacetamide solvent simultaneously
It is middle to keep its silicon to be dispersed in the ability in lignin, and layering and precipitating of the silicon grain in mixed liquor is reduced, it finally obtained more
Excellent silicon grain capacity utilizes and cycle performance.And the present invention method in using single step forming method,
Directly apply to carry out in copper foil surface and complete to be sintered again, reduce the complex process degree of preparation.
From test result, the lithium ion battery in embodiment has excellent electrochemistry cycle performance.In comparative example
Battery, although capability retention numerical value is larger after efficiency first and circulation in 100 weeks such as graphite cathode battery, the battery
Capacity is inherently small, almost only in the present embodiment battery 1/7 ~ 1/8, can not be with battery phase in the present embodiment in practicality
Carry and mentioning in the same breath.And although the common first all reversible capacities of nano-silicon negative battery are high, efficiency and cycle efficieny are low first, 100 weeks
Capability retention is even more and fallen to less than 30% after circulation, can not meet the needs of long-term use of, battery life is short.
By taking embodiment 3 in battery of tests as an example, the embodiment is optimal parameter result in first group of embodiment, its first week
Reversible capacity reaches 3086 mAh/g, the lithium battery of conventional graphite cathode pole piece in remote super comparative example 1, and efficiency is more than 80% first,
Capacity reaches 2378 mAh/g after circulation in 100 weeks, and considerably beyond comparative example, capability retention has exceeded 80%.
It is last it should be noted that above example is only illustrating the technical scheme of the embodiment of the present invention rather than it is entered
Row limitation, although the embodiment of the present invention is described in detail with reference to preferred embodiment, one of ordinary skill in the art
It should be understood that can still be modified to the technical scheme of the embodiment of the present invention or equivalent substitution, and these modifications or wait
The scope of amended technical scheme disengaging technical scheme of the embodiment of the present invention can not also be made with replacement.
Claims (10)
1. a kind of preparation method of lithium ion battery negative electrode, it is characterised in that comprise the following steps：
S01：The preparation of precursor solution：Lignin, polyethylene glycol oxide is taken uniformly to be mixed with dimethylformamide, wherein wooden
Element, the mass ratio of polyethylene glycol oxide and dimethylformamide are（150-250）：1:（1800-2200）, above-mentioned mixed liquor is heated
To 50-70 DEG C, 1-2 hours are stirred；
S02：Add nano silica fume：Nano silica fume is added to the nano-silicon silty in gained precursor solution, added in S01
The mass ratio of amount and lignin is 1:（0.9-1.5）；Maintain temperature constant, be persistently stirred in heating process, to mixture
Viscosity stops when being 2000-3000cp；
S03：Dry：By the precursor solution obtained in S02 coated on negative current collector, then done naturally in atmospheric environment
Dry 4-8 hours；
S04：Sintering：The negative current collector obtained in S03 is sintered into 1-2 under inert atmosphere protection at a temperature of 500-600 DEG C
Hour, obtain required lithium-ion negative pole pole piece.
2. the preparation method of lithium ion battery negative electrode as claimed in claim 1, it is characterised in that：In S01, the lignin
For one or more in hydrolytic lignin, sulfate-reducing conditions, sulfonate lignin, Alcell lignin, acetic acid lignin
Combination.
3. the preparation method of lithium ion battery negative electrode as claimed in claim 1, it is characterised in that：In S01, the polyoxygenated
Ethene relative molecular mass is 5.0 × 105-1.0×106。
4. the preparation method of lithium ion battery negative electrode as claimed in claim 1, it is characterised in that：It is molten to presoma in S02
Liquid and nano silica fume mixture persistently carry out magnetic agitation, often stir 20-30 minutes and change planetary mixer stirring 5-8 minutes.
5. the preparation method of lithium ion battery negative electrode as claimed in claim 1, it is characterised in that：In S02, nano-silicon powder
Footpath scope is 30-150nm.
6. the preparation method of lithium ion battery negative electrode as claimed in claim 1, it is characterised in that：In S03, the negative pole collection
Fluid is copper foil or applies carbon copper foil.
A kind of 7. lithium ion battery negative electrode, it is characterised in that：The cathode pole piece preparation method such as claim 1-6 is any
It is described.
A kind of 8. lithium ion battery, it is characterised in that：Cathode pole piece is as claimed in claim 6 in the lithium ion battery.
9. lithium ion battery as claimed in claim 8, it is characterised in that：The lithium ion battery is button cell；Using metal
Lithium piece is to electrode, and Celgard films are barrier film, 1mol/L LiPF6/EC+DEC, the electrolyte of 10wt% FEC additives, its
Middle EC is 1 with DEC volume ratios:1.
10. lithium ion battery as claimed in claim 9, it is characterised in that：The lithium ion battery is in test voltage 0.005-
Under 1.2V, 0.1A/g multiplying power test condition, first all reversible capacities are more than 3000mAh/g, and efficiency is more than 80% first；Circulate within 100 weeks
Capacity is more than 2000mAh/g afterwards, and capability retention is more than 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797254.4A CN107732158A (en) | 2017-09-06 | 2017-09-06 | Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797254.4A CN107732158A (en) | 2017-09-06 | 2017-09-06 | Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107732158A true CN107732158A (en) | 2018-02-23 |
Family
ID=61204953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710797254.4A Pending CN107732158A (en) | 2017-09-06 | 2017-09-06 | Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107732158A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659486A (en) * | 2018-11-22 | 2019-04-19 | 中兴高能技术有限责任公司 | Preparation method, cathode and the lithium ion battery of negative electrode of lithium ion battery |
| CN109728271A (en) * | 2018-12-19 | 2019-05-07 | 深圳市凌盛电子有限公司 | A kind of negative electrodes for lithium batteries for sweeper |
| CN110085811A (en) * | 2018-04-17 | 2019-08-02 | 南方科技大学 | SiOx/ carbon composite and preparation method thereof, lithium ion battery |
| CN110165143A (en) * | 2019-05-24 | 2019-08-23 | 东莞市安德丰电池有限公司 | A kind of lithium battery electrode plate and the preparation method and application thereof |
| CN111384370A (en) * | 2018-12-29 | 2020-07-07 | 安普瑞斯（南京）有限公司 | High-capacity density lithium ion battery cathode |
| CN111403733A (en) * | 2019-01-03 | 2020-07-10 | 通用汽车环球科技运作有限责任公司 | Method for in-situ growth of axial geometric carbon structure in electrode |
| CN111477835A (en) * | 2020-04-26 | 2020-07-31 | 四川聚创石墨烯科技有限公司 | Method for continuously preparing current collector-silicon-carbon negative electrode |
| CN112803008A (en) * | 2021-03-12 | 2021-05-14 | 合肥国轩高科动力能源有限公司 | Preparation method of coated modified high-nickel ternary cathode material and prepared material |
| CN112920365A (en) * | 2021-01-28 | 2021-06-08 | 合肥国轩高科动力能源有限公司 | Preparation method of novel anionic-nonionic aqueous polyurethane polymer electrolyte |
| SE2050837A1 (en) * | 2020-07-03 | 2022-01-04 | Stora Enso Oyj | A method for producing a carbon-silicon composite material powder, and a carbon-silicon composite material powder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894811A (en) * | 2003-12-19 | 2007-01-10 | 科诺科飞利浦公司 | Carbon-coated silicon particle powder as the anode material for lithium ion batteries and the method of making the same |
| CN101894940A (en) * | 2010-08-03 | 2010-11-24 | 哈尔滨工业大学 | Porous silicon-based cathode for lithium battery and preparation method thereof |
| CN104058404A (en) * | 2013-03-19 | 2014-09-24 | 瓦克化学股份公司 | Si/C composites as anode materials for lithium ion batteries |
| CN106415898A (en) * | 2014-05-09 | 2017-02-15 | 株式会社Lg化学 | Graphene-coated porous silicon-carbon composite and preparation method therefor |
-
2017
- 2017-09-06 CN CN201710797254.4A patent/CN107732158A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894811A (en) * | 2003-12-19 | 2007-01-10 | 科诺科飞利浦公司 | Carbon-coated silicon particle powder as the anode material for lithium ion batteries and the method of making the same |
| CN101894940A (en) * | 2010-08-03 | 2010-11-24 | 哈尔滨工业大学 | Porous silicon-based cathode for lithium battery and preparation method thereof |
| CN104058404A (en) * | 2013-03-19 | 2014-09-24 | 瓦克化学股份公司 | Si/C composites as anode materials for lithium ion batteries |
| CN106415898A (en) * | 2014-05-09 | 2017-02-15 | 株式会社Lg化学 | Graphene-coated porous silicon-carbon composite and preparation method therefor |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085811A (en) * | 2018-04-17 | 2019-08-02 | 南方科技大学 | SiOx/ carbon composite and preparation method thereof, lithium ion battery |
| CN109659486A (en) * | 2018-11-22 | 2019-04-19 | 中兴高能技术有限责任公司 | Preparation method, cathode and the lithium ion battery of negative electrode of lithium ion battery |
| CN109728271A (en) * | 2018-12-19 | 2019-05-07 | 深圳市凌盛电子有限公司 | A kind of negative electrodes for lithium batteries for sweeper |
| CN111384370A (en) * | 2018-12-29 | 2020-07-07 | 安普瑞斯（南京）有限公司 | High-capacity density lithium ion battery cathode |
| CN111403733B (en) * | 2019-01-03 | 2024-03-26 | 通用汽车环球科技运作有限责任公司 | Method for in-situ growth of axial geometry carbon structures in electrodes |
| CN111403733A (en) * | 2019-01-03 | 2020-07-10 | 通用汽车环球科技运作有限责任公司 | Method for in-situ growth of axial geometric carbon structure in electrode |
| CN110165143A (en) * | 2019-05-24 | 2019-08-23 | 东莞市安德丰电池有限公司 | A kind of lithium battery electrode plate and the preparation method and application thereof |
| CN111477835A (en) * | 2020-04-26 | 2020-07-31 | 四川聚创石墨烯科技有限公司 | Method for continuously preparing current collector-silicon-carbon negative electrode |
| SE2050837A1 (en) * | 2020-07-03 | 2022-01-04 | Stora Enso Oyj | A method for producing a carbon-silicon composite material powder, and a carbon-silicon composite material powder |
| WO2022003633A1 (en) * | 2020-07-03 | 2022-01-06 | Stora Enso Oyj | A method for producing a carbon-silicon composite material powder, and a carbon-silicon composite material powder |
| SE545277C2 (en) * | 2020-07-03 | 2023-06-13 | Stora Enso Oyj | A method for producing a carbon-silicon composite material powder, a carbon-silicon composite material powder, and a negative electrode for a non-aqueous battery |
| CN112920365A (en) * | 2021-01-28 | 2021-06-08 | 合肥国轩高科动力能源有限公司 | Preparation method of novel anionic-nonionic aqueous polyurethane polymer electrolyte |
| CN112803008B (en) * | 2021-03-12 | 2022-02-01 | 合肥国轩高科动力能源有限公司 | Preparation method of coated modified high-nickel ternary cathode material and prepared material |
| CN112803008A (en) * | 2021-03-12 | 2021-05-14 | 合肥国轩高科动力能源有限公司 | Preparation method of coated modified high-nickel ternary cathode material and prepared material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107732158A (en) | Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery | |
| CN109103399B (en) | Functional diaphragm for lithium-sulfur battery, preparation method of functional diaphragm and application of functional diaphragm in lithium-sulfur battery | |
| WO2020073915A1 (en) | Lithium ion battery negative electrode material and non-aqueous electrolyte battery | |
| JP2020013770A (en) | Carbon-lithium composite powder and preparation method thereof, and preparation method of lithium metal secondary battery electrode | |
| CN106935860A (en) | A kind of carbon intercalation V2O3Nano material, its preparation method and application | |
| CN112909234A (en) | Preparation method and application of lithium cathode or sodium cathode | |
| CN112928255B (en) | Lithium-sulfur battery composite positive electrode material and preparation method and application thereof | |
| CN106558729B (en) | A kind of lithium ion battery of graphene as anode sizing agent conductive agent | |
| CN107749464A (en) | A kind of energy density lithium ion power battery | |
| CN111517374B (en) | Fe7S8Preparation method of/C composite material | |
| CN114447322A (en) | Lithium manganese iron phosphate modified cathode material and preparation method thereof | |
| CN111009659A (en) | Preparation method and application of biomass carbon/poly-sodium manganese fluorophosphate composite material | |
| CN108054374A (en) | A kind of negative electrode battery material and preparation method thereof | |
| CN112054174A (en) | Potassium ion battery negative electrode material and preparation method and application thereof | |
| CN108899499A (en) | Based on phosphatic negative electrode material of Sb/Sn and preparation method thereof and the application in sodium-ion battery | |
| CN108695509B (en) | Composite lithium battery positive electrode with high energy storage efficiency, preparation method thereof and lithium battery | |
| CN102544511A (en) | Lithium ion battery positive electrode lithium ferrous phosphate material wrapped with strontium cerium doped cobaltate (SCC) and carbon, and preparation method for lithium ion battery positive electrode lithium ferrous phosphate material | |
| CN102332582A (en) | Preparation method for novel lithium vanadium phosphate/bamboo charcoal composite cathode material | |
| CN115332493A (en) | Pre-lithiated binary topological structure phosphorus/carbon composite material and preparation method and application thereof | |
| CN105226251A (en) | A kind of pure carbon compound cathode materials and preparation method thereof | |
| CN114864916A (en) | Niobium pentoxide coated graphite composite negative electrode material and preparation method thereof | |
| CN113104898B (en) | Li 2 Fe 3 (MoO 4 ) 4 Application in lithium ion battery cathode | |
| CN113104899A (en) | K2Fe2(MoO4)3Application in lithium ion battery cathode | |
| CN112678876B (en) | Application of LiFe4Mo5O20 in lithium ion battery cathode | |
| CN109192967A (en) | A kind of preparation method and application of lithium-sulphur cell positive electrode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |