材料科学
电极
阳极
阴极
超级电容器
电流密度
功率密度
储能
相(物质)
光电子学
二极管
石墨烯
多孔性
纳米技术
化学工程
电容
复合材料
电气工程
化学
物理
有机化学
物理化学
量子力学
工程类
功率(物理)
作者
Damin Lee,Youngjoong Choi,Min Chang Kim,Hyejeong Ji,Heon‐Cheol Shin,Kwang Ho Kim
标识
DOI:10.1016/j.est.2022.104831
摘要
Binder-free porous multi-phase electrodes were grown on Ni foam substrates using a hydrothermal method. This multi-phase electrode was inspired by high-entropy materials, which constituents with different atomic sizes can be used to fabricate electrodes with a high strength, high hardness, and good corrosion resistance. Owing to their unique microscopic structure, well-organized, independent, nanoscale multi-phase electrodes present high electrical conductivities and good ion transport abilities, rendering them attractive for high-performance energy storage systems. Herein, Ni-Cu-Fe-Co- and Mn-containing multi-phase electrodes were fabricated at different reaction times. Among them, the optimized multi-phase electrode, which was fabricated after 12 h of heating, exhibited a remarkably high specific capacity of 1011 mAh g−1 at a current density of 3 A g−1. And an excellent cycling stability of 87% after 5000 charge–discharge cycles at a current density of 10 A g−1. The asymmetric supercapacitor fabricated using the optimized multi-phase composite and graphene as the cathode and anode, respectively, presented a high energy density of 53.2 W h kg−1 and excellent power density of 1302.7 W h kg−1, and could turn on a light-emitting diode. Thus, adjustable high-performance electrodes can be used to develop new energy storage applications.
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