电解质
超级电容器
电容
电化学
化学工程
材料科学
水溶液
溶剂化
纤维
无机化学
化学
离子
电极
复合材料
有机化学
物理化学
工程类
作者
Zhixing Zhao,Yun Huang,He Zheng,Ling Zhao,Jiapin Liu,Chao Zou,Zhi Hui Dong,Xing Li,Mingshan Wang,Yuanhua Lin
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-01-06
卷期号:6 (2): 644-656
被引量:9
标识
DOI:10.1021/acsaem.2c02623
摘要
Electrolyte additives have been widely studied in the improvement of stability of aqueous electrolytes. Here, we report a crosslinking cotton fiber-/PVA-based membrane (CPM) with an excellent porosity of 73.82% and an ultrahigh liquid electrolyte uptake of 900 wt %, prepared by the solution casting method. Li2SO4 as an electrolyte salt and various concentrations of Al3+ as additives were used for fabricating the gel polymer electrolyte (GPE). On adding Al3+ into the Li2SO4 electrolyte, dissociative water and bound water in Li+ solvation interact with Al3+; this affects water molecule activity and reduces Li+ solvation. While the presence of Al3+ electrolyte exhibits better electrochemical stability under a high operating voltage of 1.6 V, the highest specific capacitance of a supercapacitor (SC) is 136 F g–1 at 1.0 A g–1, and it has 91% initial capacitance retention after 20 000 charge–discharge cycles, which is higher than that of the Li2SO4 electrolyte. This work provides a path for designing a high-output-voltage aqueous supercapacitor via electrolytes and the membrane strategy.
科研通智能强力驱动
Strongly Powered by AbleSci AI