1. Effects of Co/Ni Ratio on the Supercapacitive Properties of α-Form Hydroxides.
- Author
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Liu, Lan, Ma, Ke‐Yuan, Liu, Fu, Zhang, Xiao‐Bin, and Cheng, J. P.
- Subjects
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ELECTROCHEMICAL research , *SUPERCAPACITORS , *COBALT , *NICKEL , *HYDROXIDES - Abstract
α-Form Co xNi1- x hydroxides with different Co/Ni ratios were synthesized by a chemical co-precipitation method under mild conditions. The effects of Co/Ni ratio on the structure, morphology, and supercapacitive properties of α-form Co xNi1- x hydroxides were investigated in detail. α-Form Co xNi1- x hydroxides had structures similar to those of hydrotalcite and α-Co(OH)2, and they exhibited better electrochemical performance than α-Co(OH)2 on testing by XRD, FTIR, and electrochemical performance (when x ≠ 0). The highest specific capacitance at 1 A g-1 for α-form Co xNi1- x hydroxides (for x = 0.2) is 1696.7 F g-1. An asymmetric supercapacitor packaged with Co0.6Ni0.4 hydroxide and activated carbon as positive and negative material, respectively, had an energy density of 23.5 Wh kg-1 at a power density of 412.5 W kg-1. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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