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All-solid-state battery cell, preparation method thereof and solid-state battery

一种全固态、电芯的技术，应用在非水电解质蓄电池、锂蓄电池、二次电池等方向，能够解决难以达成全固态电池跨越、无法实现超薄硫化物电解质膜应用等问题，达到降低电芯成本、减小长度、防止内短路的效果

Active Publication Date: 2021-12-10
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, none of the above methods in the prior art can realize the application of ultra-thin sulfide electrolyte membrane, and it is difficult to achieve the leap of all-solid-state batteries from mold batteries to soft-pack batteries.

Method used

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  • All-solid-state battery cell, preparation method thereof and solid-state battery
  • All-solid-state battery cell, preparation method thereof and solid-state battery
  • All-solid-state battery cell, preparation method thereof and solid-state battery

Examples

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Effect test

Embodiment 1

[0083] In this embodiment, an all-solid-state battery cell is prepared according to the following method:

[0084] (1) An electrolyte membrane (Li 10 GeP 2 S 12 (LGPS) electrolyte membrane) is pasted on the negative electrode sheet (single-sided negative electrode sheet, the negative electrode current collector is copper foil, the negative electrode active material layer is composed of negative electrode active material, sulfide electrolyte, conductive agent and binder, and the negative electrode active material is silicon. , the sulfide electrolyte is LGPS, the conductive agent is carbon nanotube CNT, the binder is SBR, and the mass ratio of negative electrode active material, conductive agent and binder is 10:80:5:5), at 100°C Under the pressure of 500MPa, the warm isostatic pressing treatment was carried out, the number of times of pressing was 5 times, and the holding time of each time was 100min, and then the matrix was removed to obtain the first semi-finished battery ...

Embodiment 2

[0091] In this embodiment, an all-solid-state battery cell is prepared according to the following method:

[0092] (1) Lay the electrolyte membrane (thickness and material identical to the electrolyte membrane of Example 1) on the substrate (polytetrafluoroethylene substrate) to the negative electrode sheet (double-sided negative electrode sheet, the negative electrode current collector is copper foil, each The component type and the ratio of the negative electrode active material layer on one side are all the same as the negative electrode active material of embodiment 1) on both sides, carry out isostatic pressing according to the conditions identical with embodiment 1 step (1), remove matrix afterwards, Get the first semi-finished cell.

[0093] (2) On the electrolyte film on both sides of the first semi-finished electric core in step (1), the positive electrode sheet is pasted (the positive electrode collector is aluminum foil, and the component types and ratios of the pos...

Embodiment 3

[0097] In this embodiment, an all-solid-state battery cell is prepared according to the following method:

[0098] (1) An electrolyte membrane (Li 6 P.S. 5 Cl (LPSCl) electrolyte membrane) is pasted on the negative electrode sheet (single-sided negative electrode sheet, the negative electrode current collector is copper foil, the negative electrode active material layer is composed of negative electrode active material, sulfide electrolyte, conductive agent and binder, and the negative electrode active material is Graphite, the sulfide electrolyte is LPSCl, the conductive agent is conductive carbon black SP, the binder is SBR, and the mass ratio of negative electrode active material, conductive agent and binder is 55:40:5:5), on one side at 25 Cold isostatic pressing was performed at a pressure of 500 MPa at a temperature of 5 °C, and the number of times of pressing was 5 times, and the holding time of each time was 300 min. After that, the matrix was removed to obtain the fi...

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Abstract

The invention provides an all-solid-state battery cell and an all-solid-state lithium ion battery. The all-solid-state battery cell comprises at least one stacked battery cell unit, wherein the battery cell unit comprises a first positive plate, a first electrolyte membrane, a negative plate, a second electrolyte membrane and a second positive plate which are stacked in sequence, the first positive plate comprises a first positive current collector and a first positive active material layer which are stacked, and the first positive active material layer is in contact with the first electrolyte membrane; the second positive plate comprises a second positive current collector and a second positive active material layer which are stacked, and the second positive active material layer is in contact with the second electrolyte membrane; and the negative plate comprises a negative current collector and negative active material layers arranged on two opposite surfaces of the negative current collector, one negative active material layer is in contact with the first electrolyte membrane, and the other negative active material layer is in contact with the second electrolyte membrane. Therefore, the cost of the battery cell is reduced, and the all-solid-state battery is spanned from a mold battery to a soft package battery cell.

Description

[0001] This application is a divisional application with the patent application number "202010901352.X", the filing date of "August 31, 2020", and the title of the invention "An all-solid-state battery cell and its preparation method and solid-state battery". technical field [0002] The invention belongs to the technical field of batteries, and relates to an electric core, a preparation method thereof, and a battery, in particular to an all-solid electric core, a preparation method thereof, and a solid-state battery. Background technique [0003] The solid-state battery replaces the flammable organic liquid electrolyte with a non-flammable solid electrolyte, which greatly improves the safety of the battery system and achieves a simultaneous increase in energy density. Among all kinds of new battery systems, solid-state batteries are the next-generation technology closest to industrialization, which has become the consensus of the industry and the scientific community. Among...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0585H01M10/052H01M10/0525
CPCH01M10/0585H01M10/052H01M10/0525Y02E60/10Y02P70/50
Inventor 王磊李瑞杰黄海强陈少杰周龙捷
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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