材料科学
超级电容器
集电器
基质(水族馆)
电极
电化学
化学工程
氢氧化物
铜
电导率
电容
金属
纳米技术
复合材料
冶金
电解质
化学
海洋学
物理化学
工程类
地质学
作者
Zhang Qia,Jia Zou,Jin Ai,Xiaona Pan,Dandi Qiao,Junfu Li,Vijaykumar V. Jadhav,Kang Lee,Chen‐Hung Huang,Jian Zhang
标识
DOI:10.1021/acsami.3c10925
摘要
The current collector serves as a crucial element in supercapacitors, acting as a medium between the electrode material and the substrate. Due to its excellent conductivity, a metal collector is typically favored. Enhancing the binding strength between the collector and the substrate as well as between the collector and the electrode material has emerged as a critical factor for enhancing the capacitance performance. In this study, a Ag film with a grass root-like structure was initially grown on a PI substrate through the surface modification and ion exchange (SMIE) process. This Ag interlocking structure contributes to strong binding between the PI substrate and Ag without compromising the mechanical properties of the Ag film. To further enhance the electrochemical properties at low scan rates, electroless-plated Cu was subsequently deposited on the Ag film to form the Cu/Ag current collector. Moreover, the Cu within the Cu/Ag current collector served as a precursor for the growth of FeOOH-Cu(OH)2 via a two-step in situ method. The resulting FeOOH-Cu(OH)2/Cu/Ag structure as a whole is binder-free. Supercapacitors employing symmetric FeOOH-Cu(OH)2/Cu/Ag structures were assembled, and their energy storage properties were investigated. The solution-based low-temperature process used in this study offers the potential for cost-effective and large-scale applications.
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