重量分析
材料科学
电解质
电极
电容
超级电容器
电化学
化学工程
多孔性
微分电容
介电谱
扩散
电容感应
分析化学(期刊)
石墨烯
纳米技术
循环伏安法
化学
复合材料
色谱法
热力学
物理化学
工程类
有机化学
物理
作者
Kefeng Xiao,Taimin Yang,Jianying Liang,Aditya Rawal,Huabo Liu,Ruopian Fang,Rose Amal,Hongyi Xu,Da‐Wei Wang
标识
DOI:10.1038/s41467-021-25817-8
摘要
Abstract Porous electrodes with extraordinary capacitances in liquid electrolytes are oftentimes incompetent when gel electrolyte is applied because of the escalating ion diffusion limitations brought by the difficulties of infilling the pores of electrode with gels. As a result, porous electrodes usually exhibit lower capacitance in gel electrolytes than that in liquid electrolytes. Benefiting from the swift ion transport in intrinsic hydrated nanochannels, the electrochemical capacitance of the nanofluidic voidless electrode (5.56% porosity) is nearly equal in gel and liquid electrolytes with a difference of ~1.8%. In gel electrolyte, the areal capacitance reaches 8.94 F cm −2 with a gravimetric capacitance of 178.8 F g −1 and a volumetric capacitance of 321.8 F cm −3 . The findings are valuable to solid-state electrochemical energy storage technologies that require high-efficiency charge transport.
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