水溶液
超级电容器
材料科学
羧甲基纤维素
聚丙烯酸
储能
化学工程
电解质
肿胀 的
复合材料
电化学
聚合物
电极
化学
有机化学
功率(物理)
物理
物理化学
量子力学
工程类
冶金
钠
作者
Qing Liu,Yang Cao,Ning Gu,Fei Liu,Qing Liu,Kai Ou,Fei Liu,Youyi Sun
标识
DOI:10.1016/j.mtchem.2023.101651
摘要
A new aqueous network binder with good self-healing and robust performance is developed for high-performance aqueous energy storage devices. Comparing to conventional polymeric binders, such as polyvinylidenefluoride (PVDF) or polyacrylic acid carboxymethyl cellulose (CMC), the present aqueous network binder exhibit higher adhesive strength of ca.1.1 MPa, better hydrophilicity (i.e. CA = 40.7°), and enhanced self-healing property. When applied to supercapacitors, the resulting all-solid-state supercapacitor has a larger areal specific capacitance of 696.6 mF/cm2, while maintaining a retention rate of 90.3% after 3000 cycles. Furthermore, the mild aqueous zinc button cell based on this binder also exhibits a large capacity of 48.8 mAh/g and a retention rate of 83.4% after 1000 cycles. Such electrochemical performance can be attributed to the adopted binder that facilitates the diffusion of stored ions from the electrolyte to the active materials, while its hydrophilicity and self-healing performance prevents damage caused by the swelling of the electrode. This work thus provides a new avenue for the development of aqueous binders with desired properties for aqueous energy storage devices.
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