CN107093706A - Cathode of lithium battery preparation method - Google Patents
Cathode of lithium battery preparation method Download PDFInfo
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- CN107093706A CN107093706A CN201710338720.2A CN201710338720A CN107093706A CN 107093706 A CN107093706 A CN 107093706A CN 201710338720 A CN201710338720 A CN 201710338720A CN 107093706 A CN107093706 A CN 107093706A
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- cathode
- lithium
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- lithium battery
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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
- H01M4/13—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- 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
- H01M4/381—Alkaline or alkaline earth metals elements
-
- 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
- H01M4/381—Alkaline or alkaline earth metals elements
- H01M4/382—Lithium
-
- 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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Cathode of lithium battery preparation method, is related to solid state battery and liquid state batteries field.The present invention is low in order to solve graphite cathode gram specific capacity traditional at present, and dendrite easily grows, and coulombic efficiency is low first, the problem of battery energy density is low.Absorption or porous intermediate material layer are mixed to form according to a certain ratio Step 1: conductive agent and weight/mass percentage composition that the carbons material for being 75%~90% by weight/mass percentage composition, weight/mass percentage composition are 5%~20% are 5%~10% binding agent, then intermediate material layer is coated on a current collector according to 1um~70um thickness;Step 2: uniform on intermediate material layer steam the metallic lithium layer or metallic sodium layer for crossing that thickness is 1um~30um;Step 3: after the operation of completion step one and step 2, by lug connection on a current collector, completing the preparation of cathode of lithium battery.It is applied in solid state battery field and liquid state batteries field.
Description
Technical field
The present invention relates to cathode of lithium battery preparation method.Belong to solid state battery and liquid state batteries field.
Background technology
Compared to the graphite cathode being applied in current business in lithium ion battery, lithium an- ode can be provided in theory
More capacity (3860mAh/g, graphite cathode:370mAh/g), lithium an- ode is expected in portable electric appts of future generation
And larger application is realized in the field such as electric automobile.It is that the lithium-sulfur cell of negative pole and the empty battery of lithium are gradually ground using lithium metal
Study carefully the concern of people, the focus as academic and industrial circle research in recent years.But, also there is many and ask in the research of lithium an- ode
Topic, most important of which one is the growth of dendrite.During dendrite is due to lithium-ion negative pole Multiple depositions/precipitation process, bear
The dendritic lithium deposit that pole occurs.The problem of dendritic growth can bring two aspects:(1) dendrite, which can pierce through barrier film, causes electricity
Short circuit current flow inside pond short circuit, both positive and negative polarity causes battery system thermal runaway, and then trigger batteries caught fire in inside battery heat
Even blast etc. a series of safety problems;(2) dendrite can increase the side reaction of electrolyte and lithium metal, consume lithium active material,
Reduce battery utilization rate.The Li dendrite for departing from collector is dead lithium, and the appearance of dead lithium can reduce available active material, drop
The efficiency and cycle life of low battery.
The appearance of Li dendrite can not be fundamentally avoided at present, and the lithium battery based on lithium anode is still in laboratory rank
Section, rarely has industry efforts appearance.
The content of the invention
The present invention is low in order to solve graphite cathode gram specific capacity traditional at present, and dendrite easily grows, first coulombic efficiency
It is low, the problem of battery energy density is low.Cathode of lithium battery preparation method is now provided.
Cathode of lithium battery preparation method, this method comprises the following steps:
Step 1: the carbons material for being 75%~90% by weight/mass percentage composition, weight/mass percentage composition are 5%~20%
Conductive agent and weight/mass percentage composition carry out being mixed to form absorption or porous intermediate material layer for 5%~10% binding agent,
Intermediate material layer is coated on a current collector according to 1um~70um thickness again;
Step 2: uniform on intermediate material layer steam the metallic lithium layer or metallic sodium layer for crossing that thickness is 1um~30um;
Step 3: after the operation of completion step one and step 2, by lug connection on a current collector, completing cathode of lithium battery
Preparation.
Beneficial effects of the present invention are:
The cathode of lithium battery of the present invention is by the collector of bottom, intermediate material layer and the metal being attached on intermediate material layer
Lithium layer or metallic sodium layer are constituted, wherein, the component that intermediate material layer is represented by following weight/mass percentage composition is constituted:Carbons material
75%~90%, conductive agent 5%~20% and binding agent 5%~10%, the thickness of intermediate material layer is 1um~70um;Metal
Lithium layer or metallic sodium layer cross lithium metal through steaming and obtained on intermediate material layer, wherein, metallic lithium layer or metallic sodium thickness degree are 1um
Metallic lithium layer or the metallic sodium layer of~30um dense uniform.The cathode of lithium battery of the present invention, can be adjusted using intermediate material layer
Control distribution of the lithium ion in negative terminal surface, it is to avoid the aggregation of lithium ion battery over time and space, realize lithium ion in negative pole
Being uniformly distributed for surface, so as to suppress the appearance of Li dendrite, improves the security performance of lithium metal battery.The cathode of lithium battery with
Coupled with height ratio capacity positive electrode such as sulphur, air etc., for constructing high-energy-density, high stability, high security
Lithium battery system is significant.
The cathode of lithium battery that the application is constituted can be applied in solid state battery field and liquid state batteries field, steam the lithium gold crossed
Category or metallic sodium can suppress the generation of lithium Zhi Jing in battery charge and discharge process, improve the security of battery, and this new
Type cathode of lithium battery can reduce battery irreversible capacity loss in formation process, improve the coulombic efficiency first of battery,
Afterwards play positive electrode gram volume and improve 3%-20%.
The cathode of lithium battery of the application and nickel cobalt aluminium tertiary cathode material are assembled into button cell, battery first imitate by coulomb
Rate is 97%, and uses traditional graphite cathode and nickel cobalt aluminium tertiary cathode material to be assembled into button cell, its first coulomb imitate
Rate is 92%.
The cathode of lithium battery of the application and nickel cobalt aluminium tertiary cathode material are assembled into button cell, circulation 200 weeks is carried out
Capacity attenuation 1.8%, and use simple metal lithium piece to do negative pole and be assembled into button cell with nickel cobalt aluminium tertiary cathode material, circulate
200 weeks capacity attenuations 3.4%.
The cathode of lithium battery of the application is matched into identical nickel cobalt aluminium tertiary cathode material, this Shen compared with conventional graphite negative pole
Cathode of lithium battery quality please than conventional graphite negative pole mitigate 10%~80%, thickness compared to traditional negative pole be thinned 10%~
90%.
So, the negative pole quality for the cathode of lithium battery that the application is constituted mitigates 10%~80%, thickness than conventional graphite negative pole
Degree is thinned 10%~90% compared to traditional negative pole, substantially increases gram specific capacity of negative material, can be by the energy of battery
Density improves 1~4 times, improves the capacity usage ratio of battery.
Brief description of the drawings
Fig. 1 is the external structure schematic diagram of cathode of lithium battery, wherein, reference 1 represents intermediate material layer, reference
2 represent metallic lithium layer or metallic sodium layer, and reference 3 represents lug;
Fig. 2 is the internal structure schematic diagram of cathode of lithium battery, wherein, reference 4 represents collector (copper foil).
Embodiment
Embodiment one:Present embodiment, the lithium battery described in present embodiment are illustrated referring to Figures 1 and 2
Negative pole preparation method, this method comprises the following steps:
Step 1: the carbons material for being 75%~90% by weight/mass percentage composition, weight/mass percentage composition are 5%~20%
Conductive agent and weight/mass percentage composition carry out being mixed to form absorption or porous intermediate material layer 1 for 5%~10% binding agent,
Intermediate material layer 1 is coated on collector 4 according to 1um~70um thickness again;
Step 2: uniform on intermediate material layer 1 steam the metallic lithium layer or metallic sodium layer 2 for crossing that thickness is 1um~30um;
Step 3: after the operation of completion step one and step 2, lug 3 is connected on collector 4, completes lithium battery and bear
The preparation of pole.
In present embodiment, distribution of the lithium ion in negative terminal surface can be regulated and controled using intermediate material layer, it is to avoid lithium ion
The aggregation of battery over time and space, realizes lithium ion being uniformly distributed in negative terminal surface, so as to suppress the appearance of Li dendrite.
The metallic lithium layer that the steaming is crossed to lithium ion by there is the intermediate material of stronger suction-operated layer to realize.The cathode of lithium battery
Structure can effectively suppress the generation of Li dendrite, improve battery security, improve the capacity usage ratio of battery, such as coordinate high
Specific capacity positive electrode is used, it will help promote the practicalization of novel high-energy metric density lithium battery.
In present embodiment, during weight/mass percentage composition represents that the quality of carbons material is accounted for for 75%~90% carbons material
Between material layer 1 gross mass ratio be 75%~90%;Weight/mass percentage composition represents conductive agent for 5%~20% conductive agent
The ratio that quality accounts for the gross mass of intermediate material layer 1 is 5%~20%;Weight/mass percentage composition represents for 5%~10% binding agent
The ratio that the quality of binding agent accounts for the gross mass of intermediate material layer 1 is 5%~10%.
Embodiment two:Present embodiment is that the cathode of lithium battery preparation method described in embodiment one is made
Further illustrate, in present embodiment, the intermediate material layer 1 that the carbons material coated on collector 4 is mixed to form refers to step
Rapid one and the lithium metal or metallic sodium that cross is steamed on intermediate material layer 1, refer to step 2.
Embodiment three:Present embodiment is that the cathode of lithium battery preparation method described in embodiment one is made
Further illustrate, in present embodiment, the carbons material in step one includes all kinds of soft carbon, hard carbon, silicon-carbon and graphite
In one or more.
Embodiment four:Present embodiment is that the cathode of lithium battery preparation method described in embodiment one is made
Further illustrate, in present embodiment, intermediate material layer 1, metallic lithium layer and metallic sodium layer are the active matter of cathode of lithium battery
Matter.
Claims (4)
1. cathode of lithium battery preparation method, it is characterised in that this method comprises the following steps:
Step 1: the conduction that the carbons material for being 75%~90% by weight/mass percentage composition, weight/mass percentage composition are 5%~20%
Agent and weight/mass percentage composition are that 5%~10% binding agent is mixed to form absorption or porous intermediate material layer according to a certain ratio
(1), then by intermediate material layer (1) it is coated according to 1um~70um thickness on collector (4);
Step 2: uniform on intermediate material layer (1) steam the metallic lithium layer or metallic sodium layer (2) for crossing that thickness is 1um~30um;
Step 3: after the operation of completion step one and step 2, lug (3) is connected on collector (4), completes lithium battery and bear
The preparation of pole.
2. cathode of lithium battery preparation method according to claim 1, it is characterised in that the carbon coated on collector (4)
The intermediate material layer (1) that class material is mixed to form, refers to step one and the lithium metal or metal crossed is steamed on intermediate material layer (1)
Sodium, refers to step 2.
3. cathode of lithium battery preparation method according to claim 1, it is characterised in that the carbons material in step one includes
One or more in soft carbon, hard carbon, all kinds of silicon-carbon and graphite.
4. cathode of lithium battery preparation method according to claim 1, it is characterised in that intermediate material layer (1), metallic lithium layer
It is the active material of cathode of lithium battery with metallic sodium layer.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN201710338720.2A CN107093706A (en) | 2017-05-15 | 2017-05-15 | Cathode of lithium battery preparation method |
PCT/CN2017/090252 WO2018209762A1 (en) | 2017-05-15 | 2017-06-27 | Lithium battery anode and preparation method and application thereof |
Applications Claiming Priority (1)
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CN201710338720.2A CN107093706A (en) | 2017-05-15 | 2017-05-15 | Cathode of lithium battery preparation method |
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CN107093706A true CN107093706A (en) | 2017-08-25 |
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CN201710338720.2A Pending CN107093706A (en) | 2017-05-15 | 2017-05-15 | Cathode of lithium battery preparation method |
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CN (1) | CN107093706A (en) |
WO (1) | WO2018209762A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110676433A (en) * | 2018-07-03 | 2020-01-10 | 郑州宇通集团有限公司 | Composite lithium cathode, preparation method thereof and lithium battery |
CN114944477A (en) * | 2022-05-25 | 2022-08-26 | 珠海鹏辉能源有限公司 | Preparation method of metal lithium-carbon composite material and lithium battery |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112750978B (en) * | 2020-12-30 | 2022-03-15 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
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CN1378296A (en) * | 2001-03-27 | 2002-11-06 | 日本电气株式会社 | Anode for secondary battery and secondary battery with such anode |
CN105977450A (en) * | 2016-06-23 | 2016-09-28 | 盈天科技(深圳)有限公司 | Method for plating lithium on anode plate of lithium ion battery |
CN106558692A (en) * | 2015-09-30 | 2017-04-05 | 中国科学院大连化学物理研究所 | A kind of lithium battery negative pole and its preparation and application |
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CN103066250A (en) * | 2011-10-18 | 2013-04-24 | 上海德朗能动力电池有限公司 | Lithium ion battery negative electrode with double-layer active substance structure and lithium ion battery with the same |
CN102800865A (en) * | 2012-08-28 | 2012-11-28 | 吴永胜 | Lithium battery with total solid ions for conducting power |
CN104409224A (en) * | 2013-11-28 | 2015-03-11 | 东莞市长安东阳光铝业研发有限公司 | Cathode plate for lithium-ion capacitor and production method of cathode plate |
CN105470450A (en) * | 2014-10-16 | 2016-04-06 | 万向A一二三***有限公司 | Silicon negative electrode plate for lithium-ion power battery and preparation method of silicon negative electrode plate |
CN104835652A (en) * | 2015-03-24 | 2015-08-12 | 中航锂电(洛阳)有限公司 | Lithium-intercalation negative pole piece used for lithium super-capacitor battery, method for preparing same, and lithium super-capacitor battery |
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2017
- 2017-05-15 CN CN201710338720.2A patent/CN107093706A/en active Pending
- 2017-06-27 WO PCT/CN2017/090252 patent/WO2018209762A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1378296A (en) * | 2001-03-27 | 2002-11-06 | 日本电气株式会社 | Anode for secondary battery and secondary battery with such anode |
CN106558692A (en) * | 2015-09-30 | 2017-04-05 | 中国科学院大连化学物理研究所 | A kind of lithium battery negative pole and its preparation and application |
CN105977450A (en) * | 2016-06-23 | 2016-09-28 | 盈天科技(深圳)有限公司 | Method for plating lithium on anode plate of lithium ion battery |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110676433A (en) * | 2018-07-03 | 2020-01-10 | 郑州宇通集团有限公司 | Composite lithium cathode, preparation method thereof and lithium battery |
CN110676433B (en) * | 2018-07-03 | 2021-07-27 | 郑州宇通集团有限公司 | Composite lithium cathode, preparation method thereof and lithium battery |
CN114944477A (en) * | 2022-05-25 | 2022-08-26 | 珠海鹏辉能源有限公司 | Preparation method of metal lithium-carbon composite material and lithium battery |
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Application publication date: 20170825 |