超级电容器
塔菲尔方程
电催化剂
电容
电极
材料科学
双功能
电流密度
析氧
催化作用
纳米技术
复合材料
化学工程
化学
电化学
工程类
有机化学
物理化学
物理
量子力学
作者
Ganesh T. Chavan,Deepak P. Dubal,Pritam J. Morankar,Chan‐Wook Jeon,Jinsung An,Ki-Han Song
出处
期刊:Materials
[Multidisciplinary Digital Publishing Institute]
日期:2025-01-28
卷期号:18 (3): 604-604
摘要
In the present study, self-assembled hierarchical CoMn-LDH, CoMn@CuZnS, and CoMn@CuZnFeS heterostructured composites were synthesized for bifunctional applications. As an electrode for a supercapacitor, CoMn-LDH demonstrated superior areal and specific capacitance of 5.323 F cm−2 (279.49 mAh/g) at 4 mA cm−2, comparable to or even higher than other LDHs. The assembled AC//CoMn-LDH hybrid supercapacitor device further demonstrated better stability with 63% original capacitance over 20,000 cycles. Later, as a catalyst, CoMn-LDH, CoMn@CuZnS, and CoMn@CuZnFeS electrodes revealed better performance, with overpotentials of 340, 350, and 366 and −199, −215, and −222 mV to attain 10 mA cm−2 of current density for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. Moreover, for CoMn-LDH, small Tafel slopes of 102 and 128 mV/dec were noticed for OER and HER with good stability compared to heterostructured electrodes.
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