Chen Xiaobo, Ding Jingguo, Jiang Jing, Zhuang Guoce, Zhang Zhihai, Yang Peizhi
School of New Energy and Electronic Engineering, Yancheng Teachers University Yancheng 224051 P. R. China
Key Laboratory of Education Ministry for Advance Technique and Preparation of Renewable Energy Materials, Institute of Solar Energy, Yunnan Normal University Kunming 650500 P. R. China
RSC Adv. 2018 Aug 20;8(52):29488-29494. doi: 10.1039/c8ra05158e.
MoS and MoS/carbon allotrope (MoS/C) composites for use as anodes in supercapacitors were prepared a facile hydrothermal method. In this study, we report the effects of various carbon-based materials (2D graphene nanosheet (GNS), 1D carbon nanotube (CNT), and 0D nano carbon (NC)) on the electrochemical performances. Among all nanocomposites studied, MoS/CNT exhibited the best electrochemical performance. Specifically, the MoS/CNT composite exhibits remarkable performances with a high specific capacitance of 402 F g at a current density of 1 A g and an outstanding cycling stability with 81.9% capacitance retention after 10 000 continuous charge-discharge cycles at a high current density of 1 A g, making it adaptive for high-performance supercapacitors. The superiority of MoS/CNT was investigated by field emission scanning electron microscopy and transmission electron microscopy, which showed that MoS nanosheets were uniformly loaded into the three-dimensional interconnected network of nanotubes, providing an excellent three dimensional charge transfer network and electrolyte diffusion channels while effectively buffering the collapse and aggregation of active materials during charge-discharge processes. Overall, the MoS/CNT nanocomposite synthesized by a simple hydrothermal process presents a new and promising candidate for high-performance anodes for supercapacitors.
采用简便的水热法制备了用于超级电容器阳极的二硫化钼（MoS）和二硫化钼/碳同素异形体（MoS/C）复合材料。在本研究中，我们报告了各种碳基材料（二维石墨烯纳米片（GNS）、一维碳纳米管（CNT）和零维纳米碳（NC））对电化学性能的影响。在所研究的所有纳米复合材料中，MoS/CNT表现出最佳的电化学性能。具体而言，MoS/CNT复合材料表现出卓越的性能，在1 A g的电流密度下具有402 F g的高比电容，并且在1 A g的高电流密度下连续进行10000次充放电循环后具有出色的循环稳定性，电容保持率为81.9%，使其适用于高性能超级电容器。通过场发射扫描电子显微镜和透射电子显微镜研究了MoS/CNT的优势，结果表明MoS纳米片均匀地负载在纳米管的三维互连网络中，提供了优异的三维电荷转移网络和电解质扩散通道，同时有效地缓冲了充放电过程中活性材料的坍塌和聚集。总体而言，通过简单水热法合成的MoS/CNT纳米复合材料为高性能超级电容器阳极提供了一种新的且有前景的候选材料。
