Thermal and electrochemical performance of novel binary molten salt electrolyte based on LiTFSI/NaTf

TU Xiaohua; CHU Youqun; ZHAO Fengming; MA Chun’an

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Thermal and electrochemical performance of novel binary molten salt electrolyte based on LiTFSI/NaTf

更新时间：2025-12-10

- Thermal and electrochemical performance of novel binary molten salt electrolyte based on LiTFSI/NaTf
- CIESC Journal Issue 2, Pages: 409-414(2009)
- 作者机构：
  
  1. 浙江工业大学应用化学系
  2. 绿色化学合成技术国家重点实验室培育基地
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 February 2009，
  
  Published：05 February 2009
- 稿件说明：
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TU Xiaohua, CHU Youqun, ZHAO Fengming, et al. Thermal and electrochemical performance of novel binary molten salt electrolyte based on LiTFSI/NaTf[J]. CIESC Journal, 2009, (2): 409-414.
DOI：

TU Xiaohua, CHU Youqun, ZHAO Fengming, et al. Thermal and electrochemical performance of novel binary molten salt electrolyte based on LiTFSI/NaTf[J]. CIESC Journal, 2009, (2): 409-414. DOI：

摘要

制备了由二（三氟甲基磺酰亚胺）锂（LiTFSI）和三氟甲基磺酸钠（NaTf）形成的二元低温熔盐电解质材料，采用差热分析、电化学阻抗和循环伏安法分别对熔盐电解质体系的热学性质、电导率和电化学窗口等进行了研究。测试结果表明，LiTFSI/NaTf熔盐体系的最低共熔温度为188℃，而且具有很高的热稳定性，在300℃以内没有明显热分解的迹象;LiTFSI/NaTf熔盐体系具有较好的电导率，电导率随着LiTFSI浓度的增加而减小;温度为230℃、摩尔配比为1∶3的LiTFSI/NaTf熔盐体系的电化学窗口为4.7 V，且随着温度的升高，电化学窗口减小幅度较小，表明该体系具有良好的电化学稳定性。

Abstract

The thermal and electrochemical performance of a novel binary low temperature molten salt electrolyte based on LiTFSI/NaTf was studied with thermogravimetry/differential thermal analysis（TG/DTA），electrochemical impedance spectroscopy（EIS）and cyclic voltammetry.TG/DTA showed that the electrolyte had good thermal stability with no thermal decomposition below 300℃.The eutectic temperature of the LiTFSI/NaTf was 188℃ at the molar ratio of 1∶3.The molten salt electrolyte had good ionic conductivity .The ionic conductivity decreased with the increase of LiTFSI molar fraction.The electrochemical window of the molten salt electrolyte at the molar ratio of 1∶3 was calculated to be 4.7 V at 230℃.

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