CN114388742A - Lithium supplementing method, negative plate and secondary battery - Google Patents

Lithium supplementing method, negative plate and secondary battery Download PDF

Info

Publication number
CN114388742A
CN114388742A CN202111604151.4A CN202111604151A CN114388742A CN 114388742 A CN114388742 A CN 114388742A CN 202111604151 A CN202111604151 A CN 202111604151A CN 114388742 A CN114388742 A CN 114388742A
Authority
CN
China
Prior art keywords
lithium
sheet
vacuum degree
metal
carbonate
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.)
Granted
Application number
CN202111604151.4A
Other languages
Chinese (zh)
Other versions
CN114388742B (en
Inventor
朱登伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Lifang New Energy Science and Technology Co Ltd
Original Assignee
Hunan Lifang New Energy Science and Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunan Lifang New Energy Science and Technology Co Ltd filed Critical Hunan Lifang New Energy Science and Technology Co Ltd
Priority to CN202111604151.4A priority Critical patent/CN114388742B/en
Publication of CN114388742A publication Critical patent/CN114388742A/en
Application granted granted Critical
Publication of CN114388742B publication Critical patent/CN114388742B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • 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
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention belongs to the technical field of secondary batteries, and particularly relates to a lithium supplementing method and a secondary battery, which comprise the following steps: step S1, coating active substances on the surface of the negative current collector, and drying to obtain a pretreatment sheet; s2, selecting a metal lithium sheet, laminating the metal lithium sheet and the pretreatment sheet, placing the metal lithium sheet and the pretreatment sheet into a sealed box, heating the sealed box, and adjusting a first vacuum degree; step S3, introducing solvent vapor into the sealed box, adjusting the second vacuum degree, and standing at constant pressure; and step S4, adjusting the third vacuum degree, and standing at constant pressure to obtain the lithium-supplement negative plate. The lithium supplementing method can conveniently and rapidly supplement lithium for the negative electrode in large batch, active substances are not affected after the lithium is supplemented, the lithium is supplemented uniformly and rapidly, the active substances are not easy to fall off, and the obtained lithium supplementing electrode sheet can be directly used for the next procedure, so that the time cost is greatly saved.

Description

Lithium supplementing method, negative plate and secondary battery
Technical Field
The invention belongs to the technical field of secondary batteries, and particularly relates to a lithium supplementing method, a negative plate and a secondary battery.
Background
Electronic products, such as mobile phones, bluetooth headsets, electronic watches, etc., bring great convenience to people, and therefore, the demand for high energy density batteries is also increasing. At present, graphite is mostly adopted by lithium batteries as a negative electrode, the capacity of commercial graphite reaches 360mAh/g and is already close to the theoretical limit capacity, but the energy density of the battery only stays at the level of 320 wh/kg. In order to obtain higher energy density batteries, researchers developed metallic lithium as the negative electrode, which can have energy densities as high as 450Wh/kg based on metallic lithium capacities as high as 3860 mah/g. However, lithium metal is an active alkali metal, is easy to burn to cause danger, and has extremely high processing and storage requirements, so that the large-scale application of the lithium metal is limited. Another material, silicon, also has a capacity as high as 4200mAh/g, and is a hot spot for research. However, the first efficiency of silicon is low and the volume expansion after lithium insertion is as high as 300%, which leads to poor cycle performance. In order to solve the problem, researchers dope silicon in graphite and use the graphite, and add a lithium supplement material to improve the first effect, so that a lithium battery with high energy density can be obtained.
The methods for lithium supplement are various, and patents CN202011076665.2, CN202110410821.2, CN201621435710.8 and the like provide rolling equipment for pole piece rolling, which belongs to a physical lithium supplement method, and the physical environment requirements for rolling and lithium supplement are extremely high, otherwise, danger is easily caused. The patent CN201911357946.2 puts the metal lithium in the battery and isolates with the barrier film, and the lithium is supplemented through the small current formation, and this method needs to preset the metal lithium, and needs to isolate, and the operation is complicated and not suitable for batch application. CN201811010154.3 sets up a layer of lithium metal on the negative pole diaphragm surface and assembles into the electric core with the positive plate, then puts the electric core in organic solvent and soaks, later the packing annotates the liquid preparation electric core, and this method can solve above-mentioned problem, but the electric core takes place the active material to strip after soaking in the solvent easily, the drying after soaking packs again and annotates the liquid, the operation process is complicated.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the lithium supplement method is provided, the preparation is convenient and rapid, the lithium supplement method is not easy to fall off after lithium supplement, the working procedures such as lamination or winding can be directly carried out, and the time cost is saved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lithium supplementing method comprises the following steps:
step S1, coating a negative active material on the surface of a negative current collector, and drying to obtain a pretreatment sheet;
s2, selecting a metal lithium sheet, laminating the metal lithium sheet and the pretreatment sheet, placing the metal lithium sheet and the pretreatment sheet into a sealed box, heating the sealed box, and adjusting a first vacuum degree;
step S3, introducing solvent vapor into the sealed box, adjusting the second vacuum degree, and standing at constant pressure;
and step S4, adjusting the third vacuum degree, and standing at constant pressure to obtain the lithium-supplement negative plate.
According to the invention, the metal lithium sheet and the pretreatment sheet are arranged in a laminated manner, the metal lithium sheet and the pretreatment sheet are vacuumized and added with a vapor-state solvent, and a gaseous solution enters between the metal lithium sheet and the pretreatment sheet under the action of a gap pressure difference and capillary force and infiltrates the pretreatment sheet to form an ion channel between the metal lithium sheet and the pretreatment sheet, so that the metal lithium sheet supplements lithium to the pretreatment sheet. The method does not need a large amount of solvent for soaking, saves raw materials, saves the drying step after soaking, can carry out the next working procedure of preparing the secondary battery after vacuum lithium supplement, and greatly improves the production efficiency.
The lithium supplementing method is simple and easy to operate, can be used for batch production, is suitable for various processes such as winding, lamination and the like, is suitable for batteries such as soft packs, square aluminum shells, cylinders and the like, is suitable for positive and negative electrodes and electrolyte, and is also suitable for batteries of other systems such as sodium ion batteries and the like.
The lithium supplementing method further comprises the steps of detecting the prepared lithium supplementing negative pole piece, observing the amount of metal lithium on the surface of the pole piece, judging whether the amount of the metal lithium is gradually reduced or not, and repeating the step S3 and the step S4 if the amount of the metal lithium is more, until the metal lithium gradually disappears. The number of times of repeating the steps S3 and S4 may be 1, 2, 3, 4,5, etc.
Preferably, in the step S2, when the lithium metal sheets and the pretreatment sheet are stacked, a pressure is applied between the lithium metal sheets and the pretreatment sheet, and the pressure is 0.01MPa to 5.0 MPa. Pressure is arranged between the lithium metal sheet and the pretreatment sheet, so that the lithium metal sheet is fully contacted with the pretreatment sheet, and an ion channel is formed between the lithium metal sheet and the pretreatment sheet by subsequent solvent vapor. The pressure is preferably 0.2-0.5 MPa.
Preferably, the heating temperature in the step S2 is 45 to 280 ℃. And setting a certain temperature to keep the solvent in a gas state, and increasing the speed of the solvent vapor entering between the pretreatment sheet and the lithium metal sheet. Preferably, the heating temperature is 80 ℃ to 150 ℃.
Preferably, the vacuum degree of the vacuum pumping in the step S2 is 10Pa to 50KPa, the vacuum degree of the vacuum pumping in the step S3 is 10Pa to 50KPa, and the vacuum degree of the vacuum pumping in the step S4 is 80KPa to 101.325 KPa. And the vacuum degree of the seal box is adjusted for three times in the three steps, so that the gas solvent can be used for rapidly carrying out the vacuum degree adjustment between the pole piece substrate and the metal lithium piece.
Preferably, the standing time in the step S3 is 5-6000min, and the standing time in the step S4 is 5-6000 min. Standing for a period of time under a certain vacuum degree to enable the gas solvent to enter the metal lithium sheet and the interior of the pretreatment sheet.
Preferably, in the step S2, one or two of the lithium metal sheets are provided, and when the two lithium metal sheets are provided, the lithium metal sheet, the pretreatment sheet and the lithium metal sheet are sequentially stacked. Preferably, the metal lithium sheet, the pretreatment sheet, the metal lithium sheet and the separation layer are sequentially stacked. The isolation layer is a high polymer plastic sheet such as PET, PE, PP, PI and the like, the thickness of the sheet is 0.002-5.0 mm, the area of the sheet is not less than the area of the metal lithium sheet, and the sheet can completely cover the metal lithium sheet.
Preferably, the solvent in step S3 includes lithium salt and one or more of ethylene carbonate, propylene carbonate, fluoroethylene carbonate, vinylene carbonate, ethylene carbonate, propane sultone, butane sultone, propenyl-1, 3-sultone, ethylene sulfite, propylene sulfite, ethylene sulfate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propyl methyl carbonate, methyl formate, ethyl formate, methyl acetate, ethyl propionate, propyl propionate, ethyl butyrate, propyl butyrate, butylene carbonate, γ -butyrolactone, and tetrahydrofuran. The solvent contains organic lithium salt, so that the electronic conductivity of the metal lithium and the pole piece can be increased, and the lithium supplementing speed is improved; of course, lithium salt-free solvents can also be used, since metallic lithium is in direct contact with the pole piece, with both electron and ion channels present.
Preferably, the lithium salt is one or a mixture of more of lithium chlorate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium hexafluorophosphate, lithium bis (oxalate) borate, lithium difluorophosphate, lithium oxalyldifluoroborate, lithium bis (trifluoromethyl) sulfonimide, lithium bis (fluoro) sulfonimide, lithium difluorophosphate and lithium 4, 5-dicyano-2-trifluoromethyl imidazole.
Specifically, the lithium salt may be one or a mixture of lithium perchlorate, lithium difluorophosphate, lithium difluorobis (oxalato) phosphate, lithium tetrafluoro (oxalato) phosphate, lithium oxalato phosphate, lithium bis (oxalato) borate, lithium difluorooxalato borate, lithium tetrafluoroborate, lithium hexafluorophosphate, lithium bis (fluorosulfonyl) imide and lithium bis (fluorosulfonyl) imide.
The second purpose of the invention is: aiming at the defects of the prior art, the negative plate is provided, and has the advantages of high energy density, simple structure and easy production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a negative plate is prepared by the lithium supplementing method. The negative plate after lithium supplement has higher energy density and better electrochemical performance.
The third purpose of the invention is that: in view of the deficiencies of the prior art, a secondary battery having a high energy density is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a secondary battery comprises the negative plate. Specifically, a secondary battery comprises a positive plate, a diaphragm, electrolyte, a shell and the negative plate. The diaphragm separates positive plate and foretell negative pole piece, and the metal lithium piece in the negative pole piece sets up in the one side that is close to the diaphragm, and the casing is installed electrolyte, positive plate, diaphragm and negative pole piece. The secondary battery may be a sodium ion battery, a lithium ion battery, or the like. And is also suitable for batteries with soft packs, square aluminum shells, cylinders and the like.
The positive plate comprises a positive current collector and a positive active material arranged on at least one surface of the positive current collector, wherein the positive active material comprises one or a mixture of lithium cobaltate, lithium manganate, lithium nickelate, lithium nickel manganate, lithium iron phosphate, lithium iron manganese phosphate and the like.
The negative plate comprises a negative current collector and a negative active substance arranged on at least one surface of the negative current collector, wherein the negative active substance comprises a carbon-based negative material; more preferably, the carbon-based negative electrode material may be selected from one or more of natural graphite, artificial graphite, soft carbon, hard carbon, mesocarbon microbeads, nano carbon and carbon fibers. Besides the carbon-based negative electrode material, the negative electrode active material can also comprise one or more of a silicon-based material, a tin-based material and lithium titanate. Preferably, the silicon-based material is selected from one or more of simple substance silicon, silicon-oxygen compound, silicon-carbon compound and silicon alloy, and the tin-based material is selected from one or more of simple substance tin, tin-oxygen compound, tin-carbon compound and tin alloy. Preferably, the negative electrode active material is a mixture of natural graphite and silicon oxide in a mass ratio of 5: 1.
Compared with the prior art, the invention has the beneficial effects that: the lithium supplementing method can conveniently and rapidly supplement lithium for the negative electrode in large batch, active substances are not affected after the lithium is supplemented, the lithium is supplemented uniformly and rapidly, the active substances are not easy to fall off, and the obtained lithium supplementing electrode sheet can be directly used for the next procedure, so that the time cost is greatly saved.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.
Example 1
A lithium supplementing method comprises the following steps:
step S1, coating active substances on the surface of the negative current collector, and drying to obtain a pretreatment sheet;
s2, selecting a metal lithium sheet, laminating the metal lithium sheet and the pretreatment sheet, placing the metal lithium sheet and the pretreatment sheet into a sealed box, heating the sealed box, and adjusting a first vacuum degree;
step S3, introducing solvent vapor into the sealed box, adjusting the second vacuum degree, and standing at constant pressure;
and step S4, adjusting the third vacuum degree, and standing at constant pressure to obtain the lithium-supplement negative plate.
Wherein the production time of the steps is 30 h.
Wherein, in step S2, the lithium metal sheet and the pretreatment sheet are laminated and a pressure is set, and the pressure is 2.5 MPa.
The heating temperature in step S2 was 90 ℃.
Wherein the first vacuum degree is 250Pa in step S2, the second vacuum degree is 200Pa in step S3, and the third vacuum degree is 101.325KPa in step S4.
Wherein the standing time in the step S3 is 60min, and the standing time in the step S4 is 100 min.
In step S2, there are two lithium metal sheets, and the lithium metal sheet, the pretreatment sheet, and the lithium metal sheet are sequentially stacked.
Wherein, the solvent is lithium hexafluorophosphate and ethylene carbonate; the negative current collector is copper foil.
Example 2
The difference from example 1 is that: the metal lithium sheet is provided with a slice, and metal lithium sheet and preliminary treatment piece are range upon range of setting in proper order.
The rest is the same as embodiment 1, and the description is omitted here.
Example 3
The difference from example 1 is that: the first vacuum degree in the step S2 is 80Pa, the second vacuum degree in the step S3 is 120Pa, and the third vacuum degree in the step S4 is 80 KPa.
The rest is the same as embodiment 1, and the description is omitted here.
Example 4
The difference from example 1 is that: the first vacuum degree in the step S2 is 90Pa, the second vacuum degree in the step S3 is 160Pa, and the third vacuum degree in the step S4 is 85 KPa.
The rest is the same as embodiment 1, and the description is omitted here.
Example 5
The difference from example 1 is that: the first vacuum degree in the step S2 is 60Pa, the second vacuum degree in the step S3 is 250Pa, and the third vacuum degree in the step S4 is 90 KPa.
The rest is the same as embodiment 1, and the description is omitted here.
Example 6
The difference from example 1 is that: the first vacuum degree in the step S2 is 80Pa, the second vacuum degree in the step S3 is 260Pa, and the third vacuum degree in the step S4 is 100 KPa.
The rest is the same as embodiment 1, and the description is omitted here.
Example 7
The difference from example 1 is that: no pressure is set between the lithium metal sheet and the pretreatment sheet in the step S2, and the heating temperature is 160 ℃ in the step S2.
The rest is the same as embodiment 1, and the description is omitted here.
Example 8
The difference from example 1 is that: the pressure between the lithium metal sheet and the pretreatment sheet in the step S2 is 0.5MPa, and the heating temperature in the step S2 is 160 ℃.
The rest is the same as embodiment 1, and the description is omitted here.
Example 9
The difference from example 1 is that: the pressure between the lithium metal sheet and the pretreatment sheet in the step S2 is 2.5MPa, and the heating temperature in the step S2 is 220 ℃.
The rest is the same as embodiment 1, and the description is omitted here.
Example 10
The difference from example 1 is that: the pressure between the lithium metal sheet and the pretreatment sheet in the step S2 is 4.5MPa, and the heating temperature in the step S2 is 250 ℃.
The rest is the same as embodiment 1, and the description is omitted here.
Comparative example 1
Coating a negative electrode active substance on the surface of a negative electrode current collector, drying to obtain a pretreatment sheet, soaking the pretreatment sheet and a metal lithium sheet in electrolyte, and standing to obtain the lithium-supplementing negative electrode sheet.
And (3) performance testing: the time used for the preparation of the above examples 1 to 10 and comparative example 1 was counted, and the prepared lithium ion battery was subjected to charge and discharge tests for 300 times, and the capacity retention rate was recorded, and the test results are recorded in table 1.
TABLE 1
Figure BDA0003433097660000071
As can be seen from table 1, the lithium supplement electrode sheet prepared by the lithium supplement method of the present invention has a better capacity retention rate than the lithium supplement electrode sheet prepared by comparative example 1, and the production time is shorter, thereby greatly saving the production efficiency. From comparison between example 1 and example 2, it is found that when two lithium metal sheets are provided, the lithium supplementing effect is better and the capacity retention rate is higher. As shown by comparison of examples 1 and 3-5, when the degree of vacuum of the vacuum pumping in the step S2 is set to 250Pa, the degree of vacuum of the vacuum pumping in the step S3 is set to 200Pa, and the degree of vacuum of the vacuum pumping in the step S4 is set to 101.325KPa, the lithium supplement effect is improved by placing the lithium metal sheet and the pretreatment sheet in different vacuum environments for standing. As can be seen from comparison of examples 1, 7 to 10, the secondary battery prepared had better capacity retention when a pressure of 2.5MPa was set between the metallic lithium sheet and the pre-treatment sheet and a heating temperature was set to 90 ℃.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. A lithium supplementing method is characterized by comprising the following steps:
step S1, coating active substances on the surface of the negative current collector, and drying to obtain a pretreatment sheet;
s2, selecting a metal lithium sheet, laminating the metal lithium sheet and the pretreatment sheet, placing the metal lithium sheet and the pretreatment sheet into a sealed box, heating the sealed box, and adjusting a first vacuum degree;
step S3, introducing solvent vapor into the sealed box, adjusting the second vacuum degree, and standing at constant pressure;
and step S4, adjusting the third vacuum degree, and standing at constant pressure to obtain the lithium-supplement negative plate.
2. The lithium supplementing method according to claim 1, wherein the step S2 is performed by applying a pressure between the lithium metal sheet and the pretreatment sheet in a range of 0.01MPa to 5.0MPa when the sheets are stacked.
3. The lithium supplementing method according to claim 1 or 2, wherein the heating temperature in the step S2 is 45 ℃ to 280 ℃.
4. The method of claim 1, wherein the first vacuum degree is 10Pa-50KPa in step S2, the second vacuum degree is 10Pa-50KPa in step S3, and the third vacuum degree is 80KPa-101.325KPa in step S4.
5. The lithium supplementing method according to claim 1, wherein the standing time in the step S3 is 5-6000min, and the standing time in the step S4 is 5-6000 min.
6. The lithium supplementing method according to claim 1, wherein one or two lithium metal sheets are provided in the step S2.
7. The method of claim 1, wherein the solvent in step S3 includes lithium salt and one or more of ethylene carbonate, propylene carbonate, fluoroethylene carbonate, vinylene carbonate, ethylene carbonate, propane sultone, butane sultone, propenyl-1, 3-sultone, ethylene sulfite, propylene sulfite, ethylene sulfate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, methyl formate, ethyl formate, methyl acetate, ethyl propionate, propyl propionate, ethyl butyrate, propyl butyrate, butylene carbonate, γ -butyrolactone, and tetrahydrofuran.
8. The method according to claim 7, wherein the lithium salt is one or more of lithium chlorate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium hexafluorophosphate, lithium bis (oxalato) borate, lithium difluorophosphate, lithium oxalato difluoroborate, lithium bis (trifluoromethylsulfonyl) imide, lithium bis (fluorosulfonyl) imide, lithium difluorophosphate, and lithium 4, 5-dicyano-2-trifluoromethylimidazole.
9. A negative electrode sheet, characterized by being produced by the lithium replenishment method according to any one of claims 1 to 8.
10. A secondary battery comprising the negative electrode sheet according to claim 9.
CN202111604151.4A 2021-12-24 2021-12-24 Lithium supplementing method, negative electrode plate and secondary battery Active CN114388742B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111604151.4A CN114388742B (en) 2021-12-24 2021-12-24 Lithium supplementing method, negative electrode plate and secondary battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111604151.4A CN114388742B (en) 2021-12-24 2021-12-24 Lithium supplementing method, negative electrode plate and secondary battery

Publications (2)

Publication Number Publication Date
CN114388742A true CN114388742A (en) 2022-04-22
CN114388742B CN114388742B (en) 2024-03-12

Family

ID=81197326

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111604151.4A Active CN114388742B (en) 2021-12-24 2021-12-24 Lithium supplementing method, negative electrode plate and secondary battery

Country Status (1)

Country Link
CN (1) CN114388742B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10141647A1 (en) * 2000-09-11 2002-04-25 Angewandte Technik Mbh Greifsw Production of electrodes used for a polymer electrolyte membrane electrolytic cell or a fuel cell comprises moistening a polymer electrolyte membrane with solvent or solvent vapor, applying thixotropic screen printing pastes, and tempering
US20150364795A1 (en) * 2014-06-12 2015-12-17 Amprius, Inc. Prelithiation solutions for lithium-ion batteries
CN105810884A (en) * 2016-05-27 2016-07-27 苏州协鑫集成科技工业应用研究院有限公司 Pole piece and pressing method thereof
KR20190071301A (en) * 2017-12-14 2019-06-24 주식회사 엘지화학 Method of pre-lithiating anode and Anode obtained therefrom
CN209217136U (en) * 2018-12-27 2019-08-06 陕西煤业化工技术研究院有限责任公司 A kind of continuous prelithiation device of lithium ion cell electrode
KR20190141915A (en) * 2018-06-15 2019-12-26 주식회사 엘지화학 Method for preparing negative electrode for lithium secondary battery
US20200091549A1 (en) * 2018-09-18 2020-03-19 Volkswagen Aktiengesellschaft Method for producing a lithium-ion cell
CN112467108A (en) * 2020-11-26 2021-03-09 东莞理工学院 Porous silica composite material and preparation method and application thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10141647A1 (en) * 2000-09-11 2002-04-25 Angewandte Technik Mbh Greifsw Production of electrodes used for a polymer electrolyte membrane electrolytic cell or a fuel cell comprises moistening a polymer electrolyte membrane with solvent or solvent vapor, applying thixotropic screen printing pastes, and tempering
US20150364795A1 (en) * 2014-06-12 2015-12-17 Amprius, Inc. Prelithiation solutions for lithium-ion batteries
CN105810884A (en) * 2016-05-27 2016-07-27 苏州协鑫集成科技工业应用研究院有限公司 Pole piece and pressing method thereof
KR20190071301A (en) * 2017-12-14 2019-06-24 주식회사 엘지화학 Method of pre-lithiating anode and Anode obtained therefrom
KR20190141915A (en) * 2018-06-15 2019-12-26 주식회사 엘지화학 Method for preparing negative electrode for lithium secondary battery
US20200091549A1 (en) * 2018-09-18 2020-03-19 Volkswagen Aktiengesellschaft Method for producing a lithium-ion cell
CN209217136U (en) * 2018-12-27 2019-08-06 陕西煤业化工技术研究院有限责任公司 A kind of continuous prelithiation device of lithium ion cell electrode
CN112467108A (en) * 2020-11-26 2021-03-09 东莞理工学院 Porous silica composite material and preparation method and application thereof

Also Published As

Publication number Publication date
CN114388742B (en) 2024-03-12

Similar Documents

Publication Publication Date Title
CN104600362A (en) Power battery and lithium ion electrolyte thereof
CN105914402B (en) A kind of nonaqueous electrolytic solution and lithium ion battery
CN110994030B (en) Lithium battery electrolyte and lithium ion battery
CN117673476B (en) Lithium ion battery, battery module, battery pack and electricity utilization device
CN113140793A (en) High-voltage lithium ion electrolyte and application thereof
CN115863741A (en) Energy storage device, energy storage system and electric equipment
CN112259819B (en) Disassembling and recycling method of lithium ion battery
CN108987806B (en) Application of cyclic boric anhydride in battery electrolyte
CN112670501A (en) Negative electrode material, preparation method of negative electrode material and lithium battery
CN112542611A (en) Composition for gel electrolyte, flexible battery and preparation method thereof
CN109346763B (en) Electrolyte and lithium ion battery
CN113793990B (en) Method for improving multiplying power performance of lithium ion battery by artificially synthesizing specific solid electrolyte interface film
CN114388742A (en) Lithium supplementing method, negative plate and secondary battery
KR20170025053A (en) Initiator for gel polymer electrolyte, and gel polymer electrolyte composition and electrochemical device comprising the same
CN115810874A (en) Isolating membrane, preparation method thereof, secondary battery comprising isolating membrane and electricity utilization device
CN114792853A (en) Low-temperature lithium ion battery formation method and ultra-low-temperature lithium ion battery
WO2021127999A1 (en) Secondary battery and apparatus containing secondary battery
CN109103499A (en) A kind of polymer dielectric and its preparation method and application
CN111106349A (en) Application of norbornene derivative containing polyethylene glycol group, silicon-based negative plate and lithium ion battery
CN113823836B (en) Electrolyte, lithium ion battery and electric device
CN117154233B (en) Lithium ion battery multiplying power type electrolyte, preparation method and lithium ion battery
CN115579521B (en) Electrolyte additive, electrolyte and lithium ion battery
CN115241425B (en) Lithium manganate positive electrode material and preparation method thereof
US20220407117A1 (en) Electrolyte solution, secondary battery, battery module, battery pack and device
CN118099563A (en) Electrode lithium supplementing method and lithium battery preparation method

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
GR01 Patent grant
GR01 Patent grant