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对于高级超级电容器和电催化应用的等级性Commn-LDH和异构复合材料

Ganesh T Chavan¹, Deepak P Dubal², Pritam J Morankar³

¹Department of Civil & Environmental Engineering, Hanyang University ERICA, Ansan 15588, Republic of Korea.

Materials (Basel, Switzerland)

|February 13, 2025

概括

层级的-层双氧化物 (CoMn-LDH) 复合材料表现出卓越的性能,作为氧和演变反应的超级电容电极和电催化剂. 这些材料为储能和转换应用提供了增强的稳定性和电容.

科学领域:

材料科学与工程材料科学与工程
电化学电化学电化学
纳米技术纳米技术

背景情况:

层状双氧化物 (LDH) 是储能和催化物的有希望的材料.
开发高效和稳定的电极材料对于先进的电化学设备至关重要.
层次纳米结构可以提高储能和催化材料的性能.

研究的目的:

综合和描述新型的等级 CoMn-LDH 和它的异构结构 (CoMn@CuZnS,CoMn@CuZnFeS).
评估这些材料作为超级电容电极和氧进化反应 (OER) 和进化反应 (HER) 的电催化剂的双功能应用.

主要方法:

CoMn-LDH 的水热合成.
在 CoMn@CuZnS 和 CoMn@CuZnFeS 异构结构的制造.
使用循环电压测量,静电电荷放电和电化学阻抗光谱学进行电化学表征.
对OER和HER进行电催化活性测试.

主要成果:

CoMn-LDH表现出优越的面积电容 (5.323 F cm−2) 和特定电容 (279.49 mAh/g) 在4 mA cm−2.
该AC//CoMn-LDH混合超级电容器表现出了显著的稳定性,在20,000个周期中保持了63%的电容.
CoMn-LDH,CoMn@CuZnS,和CoMn@CuZnFeS证明了高效的OER和HER催化,具有较低的超电位.
CoMn-LDH表现出有利的Tafel斜率 (OER为102mV/dec, HER为128mV/dec) 和良好的稳定性.

结论:

合成的CoMn-LDH及其异构结构是超级电容器和OER/HER电催化剂的有效双功能材料.
作为超级电容电极,CoMn-LDH表现出卓越的性能,具有高容量和稳定性.
这些材料为开发先进的储能和转换系统提供了有前途的途径.

关键词:

塔菲尔坡道的斜坡这是一个双功能电极.循环稳定性的周期性稳定性化物超级电容器装置的装置.这是一个过度潜在的潜力.

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