Soft chemical synthesis method for preparing sodium ion solid electrolyte

A technology of solid electrolyte and synthesis method, which is applied in the field of soft chemical synthesis of sodium ion solid electrolyte, which can solve the problems of high cost, collapse of crystal structure, and inability to obtain pure phase exchange products, so as to reduce difficulty and avoid damage Effects of sexual influence, variety and quantity
CN112563564AActive Publication Date: 2021-03-26SHANGHAI INST OF SPACE POWER SOURCES
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI INST OF SPACE POWER SOURCES
Publication Date
2021-03-26

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Abstract

The invention discloses a soft chemical synthesis method for preparing a sodium ion solid electrolyte, which comprises the following steps of: 1, uniformly mixing a lithium ion solid electrolyte and asolid-phase sodium ion exchanger to obtain mixed powder; 2, carrying out heat treatment on the mixed powder to synthesize a sodium ion solid electrolyte; wherein the lithium ion solid electrolyte andthe sodium ion exchanger are kept in a solid-phase state in the heat treatment process; 3, dissolving the redundant sodium ion exchanger and the synthesized by-product by adopting a solvent, and centrifuging to obtain a solid product containing the sodium ion solid electrolyte; and 4, drying the obtained solid product, uniformly mixing the dried solid product with a sodium ion exchanger, and repeating the step 2-3 several times to improve the content of the sodium ion solid electrolyte in the solid product. The sodium ion solid electrolyte is synthesized through solid-phase exchange between the lithium ion solid electrolyte and the sodium ion exchanger under the low-temperature heat treatment condition, the method is simple and convenient, the cost is low, and industrial application is easy.
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Description

technical field

[0001] The invention relates to the field of new energy materials, in particular to a soft chemical synthesis method for preparing sodium ion solid electrolytes. Background technique

[0002] In nature, because sodium is more abundant than lithium, sodium-ion batteries have the advantage of lower cost and more sustainable development. Similar to lithium-ion batteries using organic electrolytes, sodium-ion batteries using organic liquids as electrolytes also have safety issues. Solid electrolytes have high thermal stability and wide electrochemical window. Using sodium-ion solid electrolytes to replace organic electrolytes to develop all-solid-state sodium batteries can not only effectively solve safety problems, but also improve the energy density of batteries.

[0003] Compared with lithium-ion electrolytes, there are much fewer types and quantities of sodium-ion solid electrolytes, especially those with high ionic conductivity. Na 3 Zr 2 Si 2 PO 12 an...

Claims

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