High-performance asymmetric supercapacitor consisting of Ni–Co–Cu oxy-hydroxide nanosheets and activated carbon
High-performance asymmetric supercapacitor consisting of Ni–Co–Cu oxy-hydroxide nanosheets and activated carbon
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DOI：
10.1016/j.elecom.2013.07.032
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发表时间：
2013-09
影响因子：
5.4
通讯作者：
C. Lien;Chi-Chang Hu;Chun-Tsung Hsu;D. Wong
中科院分区：
文献类型：
--
作者：
C. Lien;Chi-Chang Hu;Chun-Tsung Hsu;D. Wong
Ternary Ni–Co–Cu oxy-hydroxide nanosheets with excellent pseudocapacitive characteristics are prepared by cathodic deposition. From the x-ray photoelectron spectroscopic and Fourier transform-infrared spectroscopic analyses, the as-deposited material consists of ternary hydroxides and some copper oxide (denoted as (Ni–Co–Cu)(OH)2–CuO). The charge capacity and capacitance retention of (Ni–Co)(OH)2are significantly improved by introducing Cu(OH)2/CuO. An asymmetric supercapacitor consisting of a positive (Ni–Co–Cu)(OH)2–CuO electrode and a negative activated carbon (AC) electrode shows ideal capacitive performances with a cell voltage of 1.8 V. This asymmetric supercapacitor exhibits 94.5% cell-capacitance retention and 99.4% coulombic efficiency at 5 A g− 1in a 4000-cycle test, meanwhile about 86% cell-capacitance retention is obtained in another 47000-cycle test at 25 A g− 1, revealing its excellent stability.
