电解液浓度对炭基超级电容器低温性能的影响
Influence of Electrolyte Concentration on the Low-temperature Performance of Carbon-based Supercapacitors
赵玄烨 1王洪雷 2古丽齐热·图尔荪 1王玉龙 1何创创 3庞锦标 3杨昌平1
作者信息
- 1. 太原科技大学材料科学与工程学院,太原 030024
- 2. 太原科技大学化学工程与技术学院,太原 030024
- 3. 贵州振华电子信息产业技术研究有限公司,贵阳 550018
- 折叠
摘要
通过研究一系列LiCl溶液的凝固点、电导率随温度的变化和对超级电容器电化学性能的影响.结果表明LiCl电解液的凝固过程和凝固点与浓度密切相关.不同于其他电解液,发现冷冻的LiCl溶液在-60 ℃时仍然具有0.413 mS/cm的离子电导率,以其为电解液的超级电容器可以正常工作.此外,6.5 mol/L LiCl电解液在-60 ℃时为纯液相,具有2.44 mS/cm的最大电导率.其容量与室温相比仍保留了 46.27％,且具有较好的充放电性能.
Abstract
By studying the freezing point of a series of LiCl solutions,the change of conductivity with temperature and the influence on the electrochemical performance of supercapacitors.The results show that the freezing process and freez-ing point of LiCl electrolyte are closely related to the concentration.Compared with other electrolytes,we found that the frozen LiCl solution still has an ionic conductivity of 0.413 mS/cm at-60 ℃,and the supercapacitor can work normally using it as electrolyte.In addition,the 6.5 mol/L LiCl electrolyte is a pure liquid phase at-60 ℃,with a maximum con-ductivity of 2.44 mS/cm.The capacity retains 46.27％compared with room temperature,and has good charge and dis-charge performance.
关键词
超级电容器/LiCl/电解液浓度/低温性能Key words
supercapacitors/LiCl/electrolytes concentration/low temperature performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据