Hydrothermal Synthesis of Hierarchical Nickel- or Cobalt-Based Carbonate Hydroxides for Supercapacitor Electrodes

作者：Li, Yaling; Li, Pengcheng; Xin, Zhiqing; Sun, Zhicheng; Cao, Meijuan; Li, Luhai^*

来源：International Journal of Electrochemical Science, 2017, 12(5): 4016-4024.

DOI：10.20964/2017.05.50

• carbonate hydroxide
• hydrothermal method
• superpacacitors
• electrochemistry

Nickel-, cobalt-and nickel-cobalt carbonate hydroxides were prepared with hydrothermal method and the crystal structure, thermal property and morphology were characterized. The electrochemical performance was also studied using the three-electrode method in 6M KOH electrolyte. Nickel carbonate hydroxide and nickel-cobalt carbonate hydroxide have fluffy and hierarchical structures and exhibit much higher specific capacity compared to the as-prepared cobalt carbonate hydroxide. The specific capacity of nickel carbonate hydroxide achieves up to 169.6 mA h g(-1) and that of the nickel-cobalt carbonate hydroxide reveals 127.4 mA h g(-1) at a current density of 1 A g(-1). The two kinds of carbonate hydroxides exhibit superior cycling stability and have great application prospect for supercapacitor electrodes.

• 出版日期2017-5
• 单位北京印刷学院