title: Rational Synthesis of Branched CoMoO4@CoNiO2 Core/Shell Nanowire Arrays for All-Solid-State Supercapacitors with Improved Performance.
abstract: Effectively composite materials with optimized structures exhibited promising potential in continuing improving the electrochemical performances of supercapacitors in the past few years. Here, we proposed a rational design of branched CoMoO4@CoNiO2 core/shell nanowire arrays on Ni foam by two steps of hydrothermal processing. Owing to the high activity of the scaffold-like CoMoO4 nanowires and the well-defined CoNiO2 nanoneedles, the three-dimensional (3D) electrode architectures achieved remarkable electrochemical performances with high areal specific capacitance (5.31 F/cm(2) at 5 mA/cm(2)) and superior cycling stability(159% of the original specific capacitance, i.e., 95.7% of the maximum retained after 5000 cycles at 30 mA/cm(2)). The all-solid-state asymmetric supercapacitors composed of such electrode and activated carbon (AC) exhibited an areal specific capacitance of 1.54 F/cm(2) at 10 mA/cm(2) and a rate capability (59.75 Wh/kg at a 1464 W/kg) comparable with Li-ion batteries. It also showed an excellent cycling stability with no capacitance attenuation after 50000 cycles at 100 mA/cm(2). After rapid charging (1 s), such supercapacitors in series could lighten a red LED for a long time and drive a mini motor effectively, demonstrating advances in energy storage, scalable integrated applications, and promising commercial potential.
authors.affiliation: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China , Chengdu 610054, China.|State Key Laboratory of Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science , Beijing 100083, China.
authors.forename: Yuanfei
authors.initials: Y
authors.lastname: Ai
authors.affiliation: State Key Laboratory of Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science , Beijing 100083, China.
authors.forename: Xuewen
authors.initials: X
authors.lastname: Geng
authors.affiliation: State Key Laboratory of Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science , Beijing 100083, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Lou
authors.affiliation: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Zhiming M
authors.initials: ZM
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science , Beijing 100083, China.
authors.forename: Guozhen
authors.initials: G
authors.lastname: Shen
keywords: CoMoO4; CoNiO2; all-solid-state supercapacitors; core/shell arrays; nanowire