An ultra-high-performance anode material for supercapacitors: self-assembled long Co3O4 hollow tube network with multiple heteroatom (C-, N- and S-) doping

An ultra-high-performance anode material for supercapacitors: self-assembled long Co3O4 hollow tube network with multiple heteroatom (C-, N- and S-) doping
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一种超高性能超级电容器负极材料:多杂原子(C、N、S)掺杂的自组装长Co3O4空心管网络

DOI:
10.1039/c6ta02376b
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发表时间:
2016-06
影响因子:
11.9
通讯作者:
Wu Qingsheng
Wu Qingsheng
中科院分区:
材料科学2区
文献类型:
--
作者:
Li Jiangfeng;Zan Guangtao;Wu Qingsheng

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以鸡蛋壳膜为模板和掺杂剂,通过水热和煅烧技术制备了三种独特形貌的杂原子(C、N和S)自掺杂Co3O4超长空心管网络结构。所得Co3O4表现出超高的比电容(0.5 A g-1电流密度下为1498 F g-1)和良好的倍率性能(10 A g-1高电流密度下为795 F g-1)。此外,组装的非对称超级电容器具有29.5 W h kg−1的高能量密度,以及出色的长期循环稳定性(1000次循环后电容保持率为91.4%)。据推测,长空心网络管和微量杂原子掺杂的协同效应有助于实现显着的电化学性能。
Three unique morphologies of heteroatom (C-, N- and S-) self-doped Co3O4 network structures of super-long hollow tubes have been produced by hydrothermal and calcination techniques using the chicken eggshell membrane as the template and dopant. The obtained Co3O4 shows a super high specific capacitance (1498 F g−1 at a current density of 0.5 A g−1), and a good rate capability (795 F g−1 at a high current density of 10 A g−1). Furthermore, the assembled asymmetric supercapacitor delivers a high energy density of 29.5 W h kg−1, as well as excellent long-term cyclic stability (91.4% capacitance retention over 1000 cycles). It is speculated that the synergistic effect of long hollow network tubes and trace amounts of heteroatom doping contributes to the remarkable electrochemical performance.
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