Zhang Yuqiang, Wang Yan, Zhu Jiahui, Zhang Xubin, Cai Wangfeng
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, People's Republic of China.
Nanotechnology. 2021 May 31;32(34). doi: 10.1088/1361-6528/abe074.
A flower-like structured electrode material of CoO@Ni-Co layered double hydroxide (LDH) grown on Ni foam (CoO@Ni-Co LDH/NF) was prepared via angrowth, annealing and electrodeposition process. The CoO@Ni-Co LDH/NF electrode was prepared with the optimized conditions of annealing temperature 300 °C, deposition time 20 min and Ni/Co ratio 1:1. The results showed that the as-prepared electrode material exhibited an excellent specific capacitance and great cycling stability. Furthermore, an quasi-solid-state supercapacitor was assembled using the prepared CoO@Ni-Co LDH/NF as the positive electrode and activated carbon on Ni foam (AC/NF) as the negative electrode. The as-assembled device presented a high energy density and power density.
通过原位生长、退火和电沉积工艺制备了一种在泡沫镍上生长的CoO@Ni-Co层状双氢氧化物（LDH）的花状结构电极材料（CoO@Ni-Co LDH/NF）。在退火温度300℃、沉积时间20分钟和Ni/Co比为1:1的优化条件下制备了CoO@Ni-Co LDH/NF电极。结果表明，所制备的电极材料表现出优异的比电容和良好的循环稳定性。此外，以制备的CoO@Ni-Co LDH/NF为正极，泡沫镍上的活性炭（AC/NF）为负极组装了准固态超级电容器。所组装的器件呈现出高能量密度和功率密度。
