Study of pseudocapacitive contribution to superior energy storage of 3D heterostructure CoWO4/Co3O4 nanocone arrays
Study of pseudocapacitive contribution to superior energy storage of 3D heterostructure CoWO4/Co3O4 nanocone arrays
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3D异质结构CoWO4/Co3O4纳米锥阵列的赝电容贡献研究
DOI:
10.1016/j.jpowsour.2019.02.041
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发表时间:
2019-04
影响因子:
9.2
通讯作者:
Jiang Xinbiao
中科院分区:
文献类型:
--
作者:
Zhang Mingchang;Fan Huiqing;Ren Xiaohu;Zhao Nan;Peng Haijun;Wang Chao;Wu Xiaobo;Dong Guangzhi;Long Changbai;Wang Weijia;Gao Yong;Ma Longtao;Wu Peng;Li Hua;Jiang Xinbiao
Nanoscale transition metal oxides and polyoxometalates attract great attention due to their short diffusion channel distance and reversible redox reaction. However, the inevitable agglomeration, shrinkage and volumetric expansion/shrinkage of nanomaterials seriously affect their electrochemical properties. Here, the 3D heterostructure CoWO4/Co3O4nanocone arrays are synthesized via a facile and efficient microwave hydrothermal method. The obtained CoWO4/Co3O4NCAs overcome these shortcomings and achieve high electrochemical performance. The electrochemical behaviors of as-prepared composites are investigated systematically, during which four pairs of redox peaks in cyclic voltammetry curve are observed and discussed in detail. The kinetic analysis of redox reaction is employed to confirm the redox pseudocapacitance mechanism (surface capacitance-dominated process) and intercalation pseudocapacitance mechanism (diffusion-controlled process) of charge storage, suggesting faradaic intercalation process of 3D heterostructure CoWO4/Co3O4NCAs (22% diffusion contribution at 0.8 mV s−1). The assembled solid-state hybrid supercapacitors further exhibit high energy density (45.6 Wh kg−1) and power density (7500 W kg−1at 32.8 Wh kg−1) even at a super-high total loading mass of 23.1 mg of active materials. This work provides some meaningful and significant basis and foundation for the study of supercapacitors.
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影响因子:
29.4
作者:
Ting Yu;Yanwu Zhu;X. J. Xu;Zexiang Shen;Ping-Ou Chen;Chwee Teck Lim;J. Thong;C. Sow
通讯作者:
Ting Yu;Yanwu Zhu;X. J. Xu;Zexiang Shen;Ping-Ou Chen;Chwee Teck Lim;J. Thong;C. Sow
影响因子:
--
作者:
Mei, Weimin;Huang, Jun;Zhu, Liping;Ye, Zhizhen;Mai, Yongjin;Tu, Jiangping
通讯作者:
Tu, Jiangping
影响因子:
11.9
作者:
Lin Jinghuang;Wang Haohan;Yan Yaotian;Zheng Xiaohang;Jia Henan;Qi Junlei;Cao Jian;Tu Jinchun;Fei Weidong;Feng Jicai
通讯作者:
Feng Jicai
影响因子:
32.5
作者:
Qie, Long;Chen, Weimin;Huang, Yunhui
通讯作者:
Huang, Yunhui
影响因子:
9.2
作者:
Lv, Yaokang;Gan, Lihua;Wright, Dominic S.
通讯作者:
Wright, Dominic S.