期刊
ELECTROCHIMICA ACTA
卷 345, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.136198
关键词
Cobalt-doped MnO2; Graphene oxide; Nanocomposites; Asymmetric supercapacitor; High-voltage supercapacitors
资金
- National Science Foundation of China (NSFC) [21641007]
- Key Laboratory of Environment Friendly Polymer Materials of Anhui Province
Efficient and novel cobalt doped MnO2 nanowires decorated with Graphene oxide was successfully synthesized with hydrothermal method and ultrasonic process. The nanocomposite phase was confirmed by XRD and XPS data. TEM and HRTEM analysis showed the good dispersion of MnO2 nanowires on graphene oxide sheets. Benefiting from the synergistic effect between cobalt-doped MnO2 nanowires and graphene oxide, the electrode material showed a satisfactory electrochemical performance with high specific capacitance of 397 F g(-1) at 0.5 A g(-1), high rate capability (328 F g(-1) at 20 A g(-1)), and excellent capacitance retention only 2.5% decay after 4000 cycles at 10 A g(-1) current density. As application for asymmetric supercapacitor device, the Cobalt doped MnO2 decorated with graphene oxide (MCo(0.25)/GO) electrode achieved a wide potential window up to 2.3 V with a high energy density of 35.3 Wh.kg(-1) at power density of 590 W kg(-1). Moreover, an energy density value of 25.8 Wh.kg(-1) is maintained at high power density (5.6 kW kg(-1)). Therefore, the prepared MCo(0.25)/GO nanocomposite, with outstanding electrochemical performance, is considered as suitable and great potential application for supercapacitor device in the next generation. (c) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据