超级电容器
阴极
兴奋剂
材料科学
储能
功率密度
钒
镍
阳极
化学工程
纳米技术
无机化学
光电子学
化学
电容
物理
冶金
功率(物理)
工程类
电极
物理化学
量子力学
作者
Shidong Li,Xinbo Pan,Wenquan Wang,Lijun Zhao
标识
DOI:10.1016/j.matchemphys.2024.129226
摘要
One of the most promising cathode materials for supercapacitors is nickel-cobalt layered double hydroxide (NiCo-LDH). Doping atoms are widely used to solve the problems of poor electrical conductivity and structural defects of electrode materials. Vanadium (V) has received widespread attention due to its multiple oxidation states and low cost. In this article, we use one-step hydrothermal method to synthesize V-doped NiCo-LDH (V-NC1.5). By regulating the doping amount of V, 2V-NC1.5 exhibits superb specific capacitance of 1835 F g−1 at 1 A g−1. An asymmetric aqueous supercapacitor was assembled with 2V-NC1.5 and activated carbon. Its maximum energy density can reach 60.9 Wh kg−1 at 800 W kg−1 of power density. When the two units are connected in series, they can effectively power a white LED bulb and maintain its brightness for more than 30 min. This result provides a potential opportunity for the efficient deployment of innovative energy storage technologies in the coming years.
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