One-step synthesis of CoMoO4/graphene composites with enhanced electrochemical properties for supercapacitors
One-step synthesis of CoMoO4/graphene composites with enhanced electrochemical properties for supercapacitors
复制标题
一步合成具有增强超级电容器电化学性能的CoMoO4/石墨烯复合材料
DOI：
10.1016/j.electacta.2013.03.131
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发表时间：
2013-06-01
影响因子：
6.6
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Xia, Xifeng;Lei, Wu;Wang, Xin
采用水热法制备了具有电化学性能的CoMoO 4/石墨烯（CoMoO 4/G）超级电容器材料。Co2+离子通过静电作用吸附在氧化石墨烯上，然后加入（NH 4）（6）Mo 7 O24并调节pH，水热反应后在石墨烯片上生长CoMoO 4纳米颗粒。所制备的CoMoO 4/G复合材料具有较高的比表面积和较大的电活性区域，有利于OH-离子的加入和快速的电荷传输。结果表明，CoMoO 4/G复合材料在1 mV s（-1）下的比电容为394.5 F g（-1），比能量密度为54.8 Wh kg（-1），高于纯CoMoO 4的比电容（72.0 F g（-1），10.0 Wh Kg（-1））。与纯CoMoO 4相比，CoMoO 4/G复合材料具有较低的电化学电阻、良好的倍率性能和良好的循环寿命。(C)2013爱思唯尔有限公司保留所有权利。
A facile hydrothermal method was provided for synthesis of the CoMoO4/graphene (CoMoO4/G) with the enhanced electrochemical properties for supercapacitor. The Co2+ ions were adsorbed on the graphene oxide by electrostatic interaction, followed by adding (NH4)(6)Mo7O24 and adjusting pH. The CoMoO4 nanoparticles were grown on the graphene sheet after hydrothermal reaction. The as-prepared CoMoO4/G composites possessed high surface/body ratios and large electroactive regions, which could facilitate easy accession of OH- ions and fast charge transport. As a result, CoMoO4/G composites achieved a specific capacitance about 394.5 F g(-1) and a specific energy density around 54.8 Wh kg(-1) calculated from the CV curve at 1 mV s(-1), which was higher than that of pure-CoMoO4 (72.0 F g(-1), 10.0 Wh Kg(-1)). Moreover, in comparison with pure-CoMoO4, the CoMoO4/G composites exhibited low electrochemical resistance, good rate capability and well cycle life. (C) 2013 Elsevier Ltd. All rights reserved.