CoNi2S4-Graphene-2D-MoSe2 as an Advanced Electrode Material for Supercapacitors

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• 作者：Jianfeng Shen ; Jingjie Wu ; Liyuan Pei ; Marco-Tulio F. Rodrigues ; ZhuQing Zhang ; Fangfang Zhang ; Xiang Zhang ; Pulickel M. Ajayan and Mingxin Ye
• 刊名：Advanced Energy Materials
• 出版年：2016
• 出版时间：July 6, 2016
• 年：2016
• 卷：6
• 期：13
• 全文大小：9525K
• ISSN：1614-6840

文摘

3D CoNi₂S₄-graphene-2D-MoSe₂ (CoNi₂S₄-G-MoSe₂) nanocomposite is designed and prepared using a facile ultrasonication and hydrothermal method for supercapacitor (SC) applications. Because of the novel nanocomposite structures and resultant maximized synergistic effect among ultrathin MoSe₂ nanosheets, highly conductive graphene and CoNi₂S₄ nanoparticles, the electrode exhibits rapid electron and ion transport rate and large electroactive surface area, resulting in its amazing electrochemical properties. The CoNi₂S₄-G-MoSe₂ electrode demonstrates a maximum specific capacitance of 1141 F g⁻¹, with capacitance retention of ≈108% after 2000 cycles at a high charge–discharge current density of 20 A g⁻¹. As to its symmetric device, 109 F g⁻¹ at a scan rate of 5 mV s⁻¹ is exhibited. This pioneering work should be helpful in enhancing the capacitive performance of SC materials by designing nanostructures with efficient synergetic effects.