NEW ELECTROLYTE COMPOSITION FOR SODIUM ION BATTERY

DE602019067469T2Active Publication Date: 2025-03-19CENT NAT DE LA RECH SCI (C N R S) +2
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Patent Information

Application Number
DE602019067469
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2018-06-18
Filing Date
2019-06-18
Publication Date
2025-03-19
Estimated Expiration
2039-06-18

AI Technical Summary

Technical Problem

Existing sodium-ion battery electrolytes face challenges such as poor high-temperature performance, self-discharge, and compatibility with commercial polyolefin separators, which affect cycling and energy density.

Method used

A new electrolyte composition comprising a mixture of solvents like ethylene carbonate and propylene carbonate, combined with specific additives such as sodium difluoro(oxalato)borate and tris(trimethylsilyl)phosphite, and an additional carbonate like vinylene carbonate, which enhances wettability and tailors the Solid Electrolyte Interphase (SEI) thickness.

Benefits of technology

The new electrolyte composition improves capacity retention, reduces self-discharge, and enhances compatibility with commercial separators, maintaining high performance from ambient to 55°C temperatures.

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