BMIMBr水泥基电解质的制备及其在结构超级电容器中的应用

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (2): 509-516.

所属专题：水泥混凝土

BMIMBr水泥基电解质的制备及其在结构超级电容器中的应用

李建栋¹, 杨震樱¹, 丁扬飞²

1.绍兴职业技术学院建筑与设计艺术学院,浙江绍兴 312000;
2.同济大学先进土木工程材料教育部重点实验室,上海 201804

收稿日期:2023-08-23 修订日期:2023-10-08 出版日期:2024-02-15 发布日期:2024-02-05
通信作者: 杨震樱,副教授。E-mail:15958541791@163.com
作者简介:李建栋(1982—),男,高级工程师。主要从事固体废弃物在水泥基材料中的应用研究。E-mail:lijiandong9176@163.com
基金资助:
国家重点研发计划(2019YFC1906203);校级课程教学创新团队项目(JYTD2022)

Preparation of BMIMBr Cement-Based Electrolyte and Its Application in Structural Supercapacitor

LI Jiandong¹, YANG Zhenying¹, DING Yangfei²

1. College of Architecture and Design, Shaoxing Vocational and Technical University, Shaoxing 312000, China;
2. Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Tongji University, Shanghai 201804, China

Received:2023-08-23 Revised:2023-10-08 Online:2024-02-15 Published:2024-02-05

摘要/Abstract

摘要： 为了提高离子电导率和电化学性能,本文选用室温离子液体1-丁基-3-甲基咪唑溴化物(BMIMBr)作为氧化还原活性添加剂,制备了一种具有高离子电导率和良好力学性能的水泥基电解质,该材料可用于制作结构超级电容器。结果表明,含20%(质量分数)BMIMBr的水泥基电解质的离子电导率最高,为35.91 mS·cm^-1。BMIMBr能够提供可产生还原反应的Br^-,同时增加游离态离子的数量,这有利于电解质中的离子传导,并获得更高的比电容。当电流密度为0.05 A·g^-1时,结构超级电容器具有20.07 F·g^-1的高比电容。恒定电流充放电循环1 000次后,电容保持率达到83.6%,库伦效率为97.56%,展现了良好的循环寿命。

关键词: 水泥基电解质, 超级电容器, 氧化还原, 离子电导率, 比电容, 循环寿命

Abstract: To improve the ionic conductivity and electrochemical performance, a cement-based composite electrolyte with high ionic conductivity and good mechanical strength was synthesized by using room temperature ionic liquid 1-butyl-3-methylimidazole bromide (BMIMBr) as redox active additive, which can be applied to construct structural supercapacitor. The results show that the ionic conductivity of cement-based composite electrolyte containing 20% (mass fraction) BMIMBr reaches the highest value of 35.91 mS·cm^-1. BMIMBr can provide Br^- which can produce reduction reactions and increase the number of free ions, which is beneficial for ion transport in electrolyte and obtains higher specific capacitance. The structural supercapacitor shows a high specific capacitance of 20.07 F·g^-1 at a current density of 0.05 A·g^-1. After 1 000 cycles of galvanostatic charge-discharge, the capacitance retention rate reaches 83.6% and coulomb efficiency is 97.56%, demonstrating an excellent cycle lifespan.

Key words: cement-based electrolyte, supercapacitor, redox, ionic conductivity, specific capacitance, cycle lifespan

中图分类号:

TU528

李建栋, 杨震樱, 丁扬飞. BMIMBr水泥基电解质的制备及其在结构超级电容器中的应用[J]. 硅酸盐通报, 2024, 43(2): 509-516.

LI Jiandong, YANG Zhenying, DING Yangfei. Preparation of BMIMBr Cement-Based Electrolyte and Its Application in Structural Supercapacitor[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(2): 509-516.

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BMIMBr水泥基电解质的制备及其在结构超级电容器中的应用

Preparation of BMIMBr Cement-Based Electrolyte and Its Application in Structural Supercapacitor

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