1. Highly dispersed ultrasmall Ni(OH)2 aggregated particles on a conductive support as a supercapacitor electrode with superior performance.
- Author
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Wang, Yue, Zhang, Xianfeng, Li, Xin, Li, Xiaojun, Zhao, Yong, Wei, Hang, Liu, Yongguang, Jiang, Peng, and Liang, Minghui
- Subjects
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NICKEL alloys , *CLUSTERING of particles , *SUPERCAPACITOR electrodes , *ACTIVATED carbon , *CHEMICAL precursors - Abstract
To reduce the size of Ni(OH) 2 aggregates is an effective way to improve their capacitive performance for the electrodes of supercapacitors. The ultrasmall Ni(OH) 2 aggregates (1–2 nm) on active carbon (AC) can be obtained by depositing the soluble precursor of Ni(OH) 2 on AC at low temperature. The Ni(OH) 2 /AC samples were characterized by SEM, TEM, XRD and XPS. The specific capacitance of ultrasmall Ni(OH) 2 aggregates in the Ni(OH) 2 /AC composite can reach 2949 F g −1 at a scan rate of 20 mV s −1 , which is higher than its theoretical specific capacitance (2382 F g −1 ). Ni(OH) 2 aggregates supported on carbon cloth can also exhibit superior specific capacitance as a bind-free flexible electrode. The capacitive, rate and cycling performance of ultrasmall Ni(OH) 2 aggregates on AC are excellent, revealing the great potential of ultrasmall sized materials in energy storage. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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