电解质
阴极
熔盐
极化(电化学)
电化学
电流密度
化学
热的
盐(化学)
无机化学
电阻率和电导率
分析化学(期刊)
化学工程
电极
热力学
物理化学
色谱法
电气工程
工程类
物理
量子力学
作者
Yong Cao,Chenyang Gao,Xiaowei Yang,Chao Wang,Jun Yan,Dong Shi,Yong Chen,Yanhua Cui
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-01-01
卷期号:168 (1): 010503-010503
被引量:3
标识
DOI:10.1149/1945-7111/abd601
摘要
The energy density of traditional Li−Si/FeS 2 thermal batteries, which multiple cations are contained in molten salt electrolyte, is limited by the deficiency of Li + in cathode when a high discharge current is applied. To address this issue, LiCl−KCl is taken as an example to build a functional gradient structure through Li−Si/FeS 2 thermal batteries. By levering the Li + concentration in cathode and preventing the formation of high concentration polarization resistivity as well as molten salt precipitation, the energy density of Li−Si/FeS 2 single cell with a discharge current of 500 mA cm −2 , increase from 157.0 Wh kg −1 to 218.4 Wh kg −1 at 450 °C (with an increase ratio of 39.1%), compared with the original one. Similarly, a 25.6% raise is observed at 525 °C. Moreover, the effects of LiCl-rich electrolyte and the functional gradient structure on the electrochemical performance of Li−Si/FeS 2 single cells are discussed and classified.
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