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Solid electrolyte and lithium battery cell with same, and lithium battery

A technology of solid electrolyte and lithium battery, which is applied in the direction of non-aqueous electrolyte storage battery, electrolyte storage battery manufacturing, lithium storage battery, etc. It can solve the problems of poor performance of solid electrolyte and achieve the effect of good contact and good interface adhesion

Inactive Publication Date: 2019-06-25
成都大超科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problem of poor performance of the existing solid electrolyte, the invention provides a solid electrolyte and its lithium battery cell, lithium battery

Method used

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  • Solid electrolyte and lithium battery cell with same, and lithium battery
  • Solid electrolyte and lithium battery cell with same, and lithium battery
  • Solid electrolyte and lithium battery cell with same, and lithium battery

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The first embodiment of the present invention provides a solid electrolyte comprising Li a m b f x h 12-x A compound of the structural formula, wherein M includes one or a combination of B, Ga or Al, and a, b and x are expressed as positive numbers.

[0030] For example, in some specific implementations, when M is B, the corresponding value of a may be 2, and the value of b may be 12. In some special embodiments, the Li a m b f x h 12-x The structural formula can be further expressed as Li 2 B 12 f x h 12-x , where x is expressed as a positive number, specificall...

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Abstract

The invention relates to the field of lithium batteries, in particular to a solid electrolyte and a lithium battery cell with the solid electrolyte, and a lithium battery. The solid electrolyte includes LiMF<x>H<12-x>, wherein M is B, Ga, Al or a combination thereof. Compared with the existing solid electrolyte, a compound with F atoms has larger molecular volume, and thus can provide largerspace for the Li+ and improve the migration capability of lithium ions. Furthermore, the M-F bond can form a stable structure, so that the solid electrolyte can have high electrochemical window and flexibility, and the structural stability and cycle performance can be improved when lithium ions migrate rapidly. Based on the structural characteristics, the solid electrolyte can have higher shear modulus and Young's modulus.

Description

【Technical field】 [0001] The invention relates to the field of lithium batteries, in particular to a solid electrolyte, a lithium battery cell, and a lithium battery. 【Background technique】 [0002] Compared with traditional liquid electrolytes, all-solid electrolytes have the advantages of high mechanical strength and good safety. However, except for sulfide, the existing solid-state electrolyte systems have low lithium ion conductivity, and generally the ion conductivity at room temperature is less than 10. -3 S / cm, therefore, sulfide solid electrolyte materials have always been a research hotspot. However, the sulfide solid electrolyte is very sensitive to water and air, and the solid electrolyte material in the prior art has a large interface resistance after contacting the positive and negative electrode materials, resulting in a short cycle life. [0003] Generally, the inorganic powder or thin film materials used in solid electrolyte materials are polycrystalline ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/052H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张晓琨朱焱麟
Owner 成都大超科技有限公司
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