Meng Jingjing, Lu Shixiang, Xu Wenguo, Li Shuguang, Dong Xiuqi
School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
RSC Adv. 2022 May 23;12(24):15508-15516. doi: 10.1039/d2ra02056d. eCollection 2022 May 17.
Supercapacitors are energy storage devices with the advantage of rapid charging and discharging, which need a higher specific capacitance and superior cycling stability. Hence, a composite material consisting of RuCoO and reduced graphene oxide with a nanowire network structure was synthesized on nickel foam using a one-step hydrothermal method and annealing process. The nanowire network structure consists of nanowires with gaps that provide more active sites for electrochemical reactions and shorten the diffusion path of electrolyte ions. The prepared electrodes exhibit outstanding electrochemical performance with 2283 F g at 1 A g. When the current density is 10 A g, the specific capacitance of the electrodes is 1850 F g, which maintains 81% of the initial specific capacitance. In addition, the prepared electrodes have a long-term cycling life with capacitance retention of 92.60% after 3000 cycles under the current density of 10 A g. The composite material is a promising electrode material for high-performance supercapacitors.
超级电容器是一种储能装置，具有快速充放电的优点，需要更高的比电容和优异的循环稳定性。因此，采用一步水热法和退火工艺在泡沫镍上合成了一种具有纳米线网络结构的RuCoO与还原氧化石墨烯复合材料。纳米线网络结构由带有间隙的纳米线组成，这些间隙为电化学反应提供了更多活性位点，并缩短了电解质离子的扩散路径。制备的电极在1 A g时表现出2283 F g的出色电化学性能。当电流密度为10 A g时，电极的比电容为1850 F g，保持初始比电容的81%。此外，制备的电极具有长期循环寿命，在10 A g的电流密度下经过3000次循环后电容保持率为92.60%。该复合材料是一种有前途的高性能超级电容器电极材料。
