CN105489944A - Preparation method of all-solid-state battery employing lithium metal as negative electrode - Google Patents
Preparation method of all-solid-state battery employing lithium metal as negative electrode Download PDFInfo
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- CN105489944A CN105489944A CN201510846404.7A CN201510846404A CN105489944A CN 105489944 A CN105489944 A CN 105489944A CN 201510846404 A CN201510846404 A CN 201510846404A CN 105489944 A CN105489944 A CN 105489944A
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- Prior art keywords
- solid
- lithium metal
- state battery
- preparation
- solid electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M4/382—Lithium
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a preparation method of an all-solid-state battery employing a lithium metal as a negative electrode. The method is characterized by comprising the following steps: (101) pressing the lithium metal on a current collector in the preparation process of an all-solid-state battery core; (102) coating the surface of the lithium metal with a negative material thin layer; and (103) finishing pressing and molding of a solid electrolyte and a composite positive material and preparation of the all-solid-state battery core. Negative material thin layer coating is carried out on the surface of the negative electrode of the lithium metal; and the lithium metal and the solid electrolyte material are physically isolated, so that the solid electrolyte material is prevented from directly contacting the lithium metal for reaction. With the painted negative material thin layer as a transitional material, the all-solid-state battery has electronic conductivity, and meanwhile, shuttling of lithium ions in the charge-discharge cycle process of the all-solid-state battery is not hindered.
Description
Technical field
The invention belongs to all-solid-state battery technical field, all-solid-state battery refers to the novel battery adopting solid electrolyte to instead of liquid organic electrolyte in existing lithium battery.In particular, the present invention relates to a kind of all-solid-state battery preparation method adopting lithium metal to do negative pole
Background technology
Under powerful social development demand and huge potential market promote, chemical energy storage new system based on new ideas, new material and new technology continues to bring out, chemical energy storage technology forward security is reliable, the long-life, extensive, low cost, free of contamination future development.At present in lithium ion battery, due to the organic electrolyte using ester class, ethers etc. inflammable in a large number, there is serious potential safety hazard, when battery is because of any reason short circuit, battery self-energy can discharge in the form of heat in the short time, lights these ethers as solvent, explosion caused.The solid lithium battery of organic electrolyte is substituted with solid electrolyte, at solution conventional lithium ion battery capacity while on the low side and useful life these two key issues partially short, be expected to the safety issue thoroughly solving battery, thus the solid lithium battery of solid electrolyte replacement traditional liquid organic electrolyte is just attracting increasing concern.
In the solid lithium battery taking sulfide material as solid electrolyte, because most of sulfide electrolyte material is unstable to lithium, cause can not directly adopting lithium metal as negative pole in assembling all-solid-state battery process, can only adopt to electrolyte stable if lithium indium alloy etc. is as negative pole, and lithium indium alloy current potential is higher than lithium metal, the all-solid-state battery voltage platform assembled reduces, thus reduces the overall specific energy of all-solid-state battery.Existing bibliographical information be generally adulterated by electrolyte building-up process or synthesis process obtain there is the higher solid electrolyte material to lithium stability, but the electrolyte preparation process stable to lithium metal is complicated, simultaneously in the long-time charge and discharge process of battery, solid electrolyte material and lithium metal interface still can react, and cause capacity in all-solid-state battery cyclic process sharply to reduce.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of all-solid-state battery preparation method adopting lithium metal to do negative pole.This all-solid-state battery preparation method solves: all-solid-state battery solid electrolyte material and lithium metal instability cause can not adopting lithium metal directly as the problem of negative material, a kind of method simple to operation is provided, reduce the requirement of all-solid-state battery to electrolyte, lithium metal can directly be used as all-solid-state battery negative material, improve the operating voltage of all-solid-state battery, effectively improve all-solid-state battery specific energy.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
Adopt lithium metal to be an all-solid-state battery preparation method for negative pole, comprise the steps:
Step 101, in all-solid-state battery battery core preparation process, lithium metal to be compressed on current collector;
Step 102, at metallic lithium surface coating negative material thin layer;
Step 103, complete solid electrolyte and composite positive pole compressing and all-solid-state battery battery core preparation.
Further: the coating in step 102 be whitewash electrostatic spraying or sputtering in one.
Further: described negative material thin layer is the one in silicon or silica or graphite.
Further: described step 102 is specially:
Step 1021, at metallic lithium surface coating negative material thin layer;
Step 1022, lithium metal to be placed in mould.
Further: after step 1022 completes, add by unit are 20-80mg*cm in mould
-2calculate the solid electrolyte of weighing, above-mentioned solid electrolyte to be evenly spread on negative electrode layer and compressing, then remove the mould of solid electrolyte side pressure.
Further: after removing the mould of solid electrolyte side pressure, positive electrode LiCoO is added
2composite material mixed uniformly with solid electrolyte, to be dispersed in solid-state electrolyte layer and compressing, then removes the mould of anode layer one end compacting.
Further: after removing the mould of anode layer one end compacting, be placed into by current collector in anode layer, then with the compacting of pressure one, after the demoulding, single battery is obtained.
The advantage that the present invention has and good effect are:
1, the present invention is by carrying out the coating of negative material thin layer on lithium anode surface, completely cuts off physically to lithium metal and solid electrolyte material, prevents solid electrolyte material and lithium metal from directly contacting and reacts;
2, the negative material thin layer of brushing of the present invention is as transition material, while having electron conduction, also can not hinder shuttling back and forth of lithium ion in all-solid-state battery charge and discharge cycles process;
3, the present invention is owing to adopting lithium metal as negative pole, with employing lithium indium alloy as compared with negative pole, improves the voltage platform of all-solid-state battery, thus improves the specific energy of all-solid-state battery.
4, the present invention only increases coating procedure in the preparation process of all-solid-state battery, simple to operate, reduces all-solid-state battery and adopts lithium metal to limit the use of solid electrolyte material as during negative pole.
Accompanying drawing illustrates:
Fig. 1 is that conventional art is using the all-solid-state battery charging curve of lithium metal as negative material;
Fig. 2 adopts technical scheme of the present invention using the all-solid-state battery charge and discharge cycles curve of lithium metal as negative material.
Embodiment
For summary of the invention, the Characteristic of this practicality can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Adopt lithium metal to be an all-solid-state battery preparation method for negative pole, comprise the steps:
The first step, covers on current collector by negative pole (lithium metal), substantially can cover current collector;
Second step, the negative material external coating one deck graphite composite powder material suppressed by the method for whitewashing, is then placed in mould;
3rd step, second step adds by unit are 20-80mg*cm
-2calculate the solid electrolyte of weighing, by compressing on its dispersed negative electrode layer, then remove the mould of solid electrolyte side pressure;
4th step, the basis of the 3rd step adds a certain amount of positive electrode LiCoO
2composite material mixed uniformly with solid electrolyte, to be dispersed in solid-state electrolyte layer and compressing, then removes the mould of anode layer one end compacting;
5th step, current collector is placed in anode layer by the basis of the 4th step, then with the compacting of pressure one, obtains single battery after the demoulding;
6th step, the battery obtained carries out packaging and testing, and contrasts with the battery not adopting the inventive method to carry out processing.
By reference to the accompanying drawings 1 and Fig. 2, do not adopt battery that the inventive method carries out processing in test process, due to electrolyte and lithium metal unstable, interface reacts, and causes battery continued jitters in charging process, can not reach battery and charge normal cut-ff voltage.And after adopting the present invention to process, battery can normally discharge and recharge.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (7)
1. adopt lithium metal to be an all-solid-state battery preparation method for negative pole, it is characterized in that: comprise the steps:
Step 101, in all-solid-state battery battery core preparation process, lithium metal to be compressed on current collector;
Step 102, at metallic lithium surface coating negative material thin layer;
Step 103, complete solid electrolyte and composite positive pole compressing and all-solid-state battery battery core preparation.
2. adopt lithium metal to be the all-solid-state battery preparation method of negative pole according to claim 1, it is characterized in that: the coating in step 102 is whitewashed or one in electrostatic spraying or sputtering.
3. according to claim 1 or 2, adopt lithium metal to be the all-solid-state battery preparation method of negative pole, it is characterized in that: described negative material thin layer is the one in silicon or silica or graphite.
4. adopt lithium metal to be the all-solid-state battery preparation method of negative pole according to claim 3, it is characterized in that: described step 102 is specially:
Step 1021, at metallic lithium surface coating negative material thin layer;
Step 1022, lithium metal to be placed in mould.
5. adopt lithium metal to be the all-solid-state battery preparation method of negative pole according to claim 4, it is characterized in that: after step 1022 completes, add by unit are 20-80mg*cm in mould
-2calculate the solid electrolyte of weighing, above-mentioned solid electrolyte to be evenly spread on negative electrode layer and compressing, then remove the mould of solid electrolyte side pressure.
6. adopt lithium metal to be the all-solid-state battery preparation method of negative pole according to claim 5, it is characterized in that: after removing the mould of solid electrolyte side pressure, add positive electrode LiCoO
2composite material mixed uniformly with solid electrolyte, to be dispersed in solid-state electrolyte layer and compressing, then removes the mould of anode layer one end compacting.
7. adopt lithium metal to be the all-solid-state battery preparation method of negative pole according to claim 6, it is characterized in that: after removing the mould of anode layer one end compacting, current collector is placed in anode layer, then with the compacting of pressure one, after the demoulding, obtains single battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846404.7A CN105489944A (en) | 2015-11-26 | 2015-11-26 | Preparation method of all-solid-state battery employing lithium metal as negative electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846404.7A CN105489944A (en) | 2015-11-26 | 2015-11-26 | Preparation method of all-solid-state battery employing lithium metal as negative electrode |
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| Publication Number | Publication Date |
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| CN105489944A true CN105489944A (en) | 2016-04-13 |
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| CN201510846404.7A Pending CN105489944A (en) | 2015-11-26 | 2015-11-26 | Preparation method of all-solid-state battery employing lithium metal as negative electrode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019019413A1 (en) * | 2017-07-26 | 2019-01-31 | 中能中科（天津）新能源科技有限公司 | Negative electrode of lithium metal, preparation method therefor, and lithium battery containing negative electrode of lithium metal |
| CN111883855A (en) * | 2020-08-31 | 2020-11-03 | 蜂巢能源科技有限公司 | All-solid-state battery cell, preparation method thereof and solid-state battery |
| CN111900331A (en) * | 2020-07-27 | 2020-11-06 | 珠海冠宇电池股份有限公司 | Composite negative pole piece, preparation method thereof and lithium ion battery |
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| US20100273062A1 (en) * | 2009-04-28 | 2010-10-28 | Toyota Jidosha Kabushiki Kaisha | All-solid-state battery |
| CN102201565A (en) * | 2011-04-14 | 2011-09-28 | 杭州万好万家动力电池有限公司 | High-capacity metal lithium powder composite cathode and preparation method thereof, and multi-layer composite electrode |
| CN103022413A (en) * | 2012-12-28 | 2013-04-03 | 东莞新能源科技有限公司 | Negative pole piece for lithium battery, preparation method of negative pole piece and lithium battery with negative pole piece |
| CN104766965A (en) * | 2014-01-03 | 2015-07-08 | 中国科学院物理研究所 | Nanometer lithium silicon alloy material, and preparation method and use thereof |
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- 2015-11-26 CN CN201510846404.7A patent/CN105489944A/en active Pending
Patent Citations (5)
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| CN101847708A (en) * | 2009-03-27 | 2010-09-29 | 比亚迪股份有限公司 | Cathode for lithium-ion secondary battery, method for producing same and lithium-ion secondary battery using same |
| US20100273062A1 (en) * | 2009-04-28 | 2010-10-28 | Toyota Jidosha Kabushiki Kaisha | All-solid-state battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019019413A1 (en) * | 2017-07-26 | 2019-01-31 | 中能中科（天津）新能源科技有限公司 | Negative electrode of lithium metal, preparation method therefor, and lithium battery containing negative electrode of lithium metal |
| CN111900331A (en) * | 2020-07-27 | 2020-11-06 | 珠海冠宇电池股份有限公司 | Composite negative pole piece, preparation method thereof and lithium ion battery |
| CN111900331B (en) * | 2020-07-27 | 2021-11-30 | 珠海冠宇电池股份有限公司 | Composite negative pole piece, preparation method thereof and lithium ion battery |
| CN111883855A (en) * | 2020-08-31 | 2020-11-03 | 蜂巢能源科技有限公司 | All-solid-state battery cell, preparation method thereof and solid-state battery |
| CN111883855B (en) * | 2020-08-31 | 2021-08-27 | 蜂巢能源科技有限公司 | All-solid-state battery cell, preparation method thereof and solid-state battery |
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Application publication date: 20160413 |
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