Sulfide solid electrolyte material with high stability to lithium, preparation method and application thereof

A solid electrolyte, solid electrolyte technology, applied in the direction of solid electrolyte, non-aqueous electrolyte, non-aqueous electrolyte battery, etc., can solve the problems of battery capacity reduction, chemical instability, service life attenuation, etc., achieve high air stability, improve ionic The effect of conductivity and long stabilization time
CN111244535AActive Publication Date: 2020-06-05ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2020-06-05

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Abstract

The invention discloses a sulfide solid electrolyte material with high stability to lithium, a preparation method thereof. A chemical composition is 7Li2S. XP2S5. YMmOn, x is greater than 0, y is greater than 0, m is greater than 0, n is greater than 0, and M is a metal element. The preparation method comprises the following steps: mixing and ball-milling Li2S, P2S5 and MmOn to obtain an initial solid electrolyte material; and putting the obtained initial solid electrolyte material into a quartz test tube, sealing, carrying out heat treatment, and grinding into powder in an inert gas atmosphere to obtain the sulfide solid electrolyte material with high stability to lithium. The electrolyte also has the advantages of high air stability, good stability to lithium metal, wide electrochemicalwindow and the like, and the all-solid-state lithium battery assembled by the solid electrolyte material has the characteristics of high charge-discharge specific capacity, high safety, excellent cycle stability and the like.
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Description

technical field

[0001] The invention relates to the technical field of solid-state electrolyte materials for lithium-ion batteries, in particular to a novel sulfide solid-state electrolyte material with high stability to lithium, a preparation method thereof, and an application of solid-state lithium batteries. Background technique

[0002] With the continuous improvement of people's living standards, the increasing popularity of digital electronic equipment and emerging electric vehicles, people have put forward higher requirements for energy storage equipment, and lithium-ion batteries have high energy density, excellent cycle stability and no memory. Utility and other advantages are being applied on a large scale. However, traditional liquid lithium-ion batteries contain a large amount of flammable and volatile organic electrolytes, which can easily cause safety problems such as fires under the conditions of overcharge, overdischarge, and high temperature. Therefore, the...

Claims

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