Carbon wrapped CoP hollow spheres for high performance hybrid supercapacitor

被引:56
作者
Zhang, Xiaojie [1 ]
Hou, Shujin [2 ]
Ding, Zibiao [2 ]
Zhu, Guang [3 ]
Tang, Haoran [1 ]
Hou, Yuancheng [1 ]
Lu, Ting [2 ]
Pan, Likun [2 ]
机构
[1] Huaiyin Inst Technol, Fac Chem Engn, Natl & Local Joint Engn Res Ctr Deep Utilizat Tec, Huaian 223003, Peoples R China
[2] East China Normal Univ, Shanghai Key Lab Magnet Resonance, Sch Phys & Elect Sci, Shanghai 200062, Peoples R China
[3] Suzhou Univ, Anhui Key Lab Spin Elect & Nanomat, Suzhou 234000, Anhui, Peoples R China
关键词
CoP/C; Hollow spheres; Hybrid supercapacitor; Excellent electrochemical performance; METAL-ORGANIC-FRAMEWORKS; FACILE SYNTHESIS; LITHIUM-ION; COMPOSITE FILM; GRAPHENE-ZNO; PHOSPHIDES; POLYHEDRA; ANODE; NANOFIBERS;
D O I
10.1016/j.jallcom.2019.153578
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Carbon coated CoP hollow spheres (CoP/C) were prepared from cobalt-based MOFs via simple calcining and subsequent phosphorization process. Meanwhile, N-doped carbon shells were also synthesized by a low-cost hard-templating method. Both of the obtained CoP/C and N-doped carbon shells deliver remarkable specific capacitances and excellent capacitance retentions when used as electrodes for supercapacitor. Remarkably, the asymmetric supercapacitor device based on the CoP/C and N-doped carbon shells delivers a high energy density of 16.14 Wh kg(-1) at a power density of 700 W kg(-1) and outstanding cycling stability (99.5% capacitance retention after 5000 cycles at a current density of 7 A g(-1)). CoP/C should be a promising electrode material for next-generation supercapacitor application. (C) 2020 Elsevier B.V. All rights reserved.
引用
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页数:11
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