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Mn doped Co(OH)2 nanosheets as electrode materials for high performance supercapacitors
Materials Letters ( IF 2.7 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.matlet.2020.127751
Chenglan Zhao , Shunfei Liang , Yuqian Jiang , Fang Gao , Li Xie , Lingyun Chen

Abstract Two-dimensional (2D) nanomaterials have great potential in supercapacitors (SCs). Herein, we reported for first synthesis of Mn doped Co(OH)2 nanosheets via a hydrothermal decomposition of a mixed aqueous solution of MnCl2·6H2O, CoCl2·6H2O and CO(NH2)2 at 200 °C for 6 h without using any template or surfactant. The synergetic effect of unique 2D structure and Mn doping is favorable for electron transportation and ion penetration. The Mn doped Co(OH)2 nanosheets-based electrode displayed a high specific capacitance of 1915.88 F·g−1 at 1.0 A·g−1 and superior cycle performance of 93.5% capacitance retention over 5,000 charge–discharge cycles at 10.0 A·g−1. The present synthetic route provides a simple and facile method for large-scale production of Mn doped Co(OH)2 nanosheets for electrochemical energy storage.

中文翻译:

Mn掺杂的Co(OH)2纳米片作为高性能超级电容器的电极材料

摘要 二维 (2D) 纳米材料在超级电容器 (SCs) 中具有巨大的潜力。在此,我们报道了在不使用任何模板的情况下,通过 MnCl2·6H2O、CoCl2·6H2O 和 CO(NH2)2 的混合水溶液在 200°C 下水热分解 6 小时,首次合成了 Mn 掺杂的 Co(OH)2 纳米片或表面活性剂。独特的二维结构和Mn掺杂的协同效应有利于电子传输和离子渗透。Mn 掺杂的 Co(OH)2 纳米片基电极在 1.0 A·g-1 下显示出 1915.88 F·g-1 的高比电容和在 10.0 A·5,000 次充放电循环中保持 93.5% 的优异循环性能g-1。本合成路线为大规模生产用于电化学储能的Mn掺杂Co(OH)2纳米片提供了一种简单易行的方法。
更新日期:2020-07-01
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