ELECTROLYTES, SODIUM SECONDARY BATTERIES, AND ENERGY CONSUMING DEVICES

VN128164APending Publication Date: 2026-08-17CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Application Number
VN1202604748
Authority / Receiving Office
VN · VN
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-09
Filing Date
2024-09-19
Publication Date
2026-08-17

AI Technical Summary

Technical Problem

There are serious gas production problems in sodium secondary batteries during recycling and storage, which affects their electrical performance and cannot meet the application needs of the new generation of electrochemical systems.

Method used

An electrolyte containing difluoroxalic acid borate and fluorosulfonate or difluorophosphate is provided as additives. By forming an oxalate-based component and other components of fluorine-containing elements, sulfur or phosphorus elements in the SEI film, the solubility and oxidative decomposition of the SEI film are reduced, and its stability and flexibility are improved.

Benefits of technology

It effectively reduces the gas production level of sodium secondary batteries, improves its storage performance, fast charging performance and circulation performance, and comprehensively improves the battery performance.

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Abstract

The invention proposes an electrolyte, a sodium secondary cell, and an energy-consuming device. The electrolyte consists of a first additive and a second additive. The first additive consists of difluoro(oxalate)borate. The second additive consists of one or more fluorosulfonates and difluorophosphates. The combined use of the first and second additives facilitates the improvement of the stability of the SEI film, thereby reducing the amount of gas generated by the sodium secondary cell during circulation and storage, improving the fast charging performance and storage performance of the sodium secondary cell.
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