期刊
ELECTROCHIMICA ACTA
卷 299, 期 -, 页码 62-71出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.12.180
关键词
CoP; Hollow microspheres; Asymmetric supercapacitor; Energy density
资金
- National Natural Science Foundation of China [51764011, 51564006, 21805055]
- Natural Science Foundation of Guangxi, China [2017GXNSFDA198021, 2016GXNSFAA380205, AA17204063, 2018GXNSFAA138064, 2017GXNSFBA198075]
- Innovation Project of Guet Graduate Education [2017YJCX113]
- Guangxi Key Laboratory of Manufacturing Systems Foundation [17-259-05-003Z]
A novel three-dimensional (3D) hierarchical pompon-like CoP hollow microspheres are prepared via a hydrothermal method combined with a subsequent phosphatization treatment. These hollow microspheres present a high specific surface area of roughly 24.6m(2) g(-1), and a plausible mechanism for their growth is also proposed. The as-obtained materials display an enhanced specific capacitance of 449.4 F g(-1) at 1 A g(-1) benefited from its unique 3D hierarchical pompon-like hollow structure with a large surface area and high utilization of active materials. Moreover, an asymmetric supercapacitor employing the as-synthesized CoP as the positive electrode and actived carbon (AC) as the negative electrode were successfully assembled, which delivered a high energy density of 22.2 Wh kg(-1) at power density of 374.9 W kg(-1) with a good cycling performance (80.9% capacitance retention after 3000 cycles). As a practical application test, a unit of three serially-connected ASCs was charged for 15 s and supplied power to, (a) a light emitting diode (LED) and (b) a small LED display screen, each of which worked for more than 35 min and 1 min, respectively. The above results demonstrate that the 3D hierarchical pompon-like CoP hollow microspheres are a promising electrode material for supercapacitor applications. (C) 2019 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