Department of Chemistry
Microwave-assisted non-aqueous homogenous precipitation of nanoball-like mesoporous α-Ni(OH)2 as a precursor for NiOx and its application as a pseudocapacitor
A novel facile and template-free method to prepare a nanoball-like NiO x material has been developed. The preparation involves the synthesis of an α-Ni(OH) 2 precursor by microwave heating and calcination of the precursor. The NiO x material possesses a nanoball-like structure with a large surface area. The pseudo-capacitive properties of the NiO x material were evaluated by cyclic voltammetry and electro-chemical impedance spectroscopy in 6 M KOH solution. The specific capacitances were 951, 796, 713 and 650 F g -1, corresponding to the scan rates of 2.0, 5.0, 10 and 20 mV s -1, respectively. The NiO x material also showed excellent cycling stability and maintained 92% of its maximum specific capacitance after 1000 cycles. The hybrid supercapacitor based on this NiO x material exhibited moderate energy density and power density. © 2012 The Royal Society of Chemistry.
Source Publication Title
Journal of Materials Chemistry
Royal Society of Chemistry
Tian, Xianqing, Changming Cheng, Lei Qian, Baozhan Zheng, Hongyan Yuan, Shunping Xie, Dan Xiao, and Martin M. F. Choi. "Microwave-assisted non-aqueous homogenous precipitation of nanoball-like mesoporous α-Ni(OH)2 as a precursor for NiOx and its application as a pseudocapacitor." Journal of Materials Chemistry 22.16 (2012): 8029-8035.