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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A free-standing manganese cobalt sulfide@cobalt nickel layered double hydroxide core-shell heterostructure for an asymmetric supercapacitor
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A free-standing manganese cobalt sulfide@cobalt nickel layered double hydroxide core-shell heterostructure for an asymmetric supercapacitor

机译：一种独立式锰钴硫化物@钴镍层层双氢氧化物核心壳异质结构，用于不对称超级电容器

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摘要

Rational design of self-supported electrode materials is important to develop high-performance supercapacitors. Herein, a free-standing MnCo2S4@CoNi LDH (MCS@CN LDH) core-shell heterostructure is successfully prepared on Ni foam using the hydrothermal reaction and electrodeposition. In this architecture, the inner MnCo2S4 nanotube provides an ultra-high electrical conductivity and the CoNi LDH nanosheets can offer more electrochemical active sites for better faradaic reactions. Moreover, the core-shell heterostructure can also maintain the structural integrity during the processes of continuous charge/discharge. The MCS@CN LDH electrode displays a satisfactory specific capacitance of 1206 C g(-1) and excellent cycling performance with similar to 92% retention after 10000 cycles. In addition, an asymmetric supercapacitor (ASC), in which MCS@CN LDH and N-doped rGO are used as the positive electrode and the negative electrode, was assembled which exhibits an energy density of 48.8 W h kg(-1) with superior cycling stability, indicating the potential of this electrode in practical energy storage.
机译：自支持的电极材料设计合理，重要的是要开发出高性能的超级电容器。在本文中，一个独立的MnCo2S4 @的CoNi LDH（MCS @ CN LDH）核壳异质结构上使用水热反应和电解镍泡沫成功地制备。在此体系结构中，内MnCo2S4碳纳米管提供的超高电导率和LDH的CoNi纳米片可以提供更好的法拉第反应多个电化学活性位点。此外，核 - 壳异质结构也能保持连续的充电/放电的过程中的结构完整性。的MCS @ CN LDH电极显示器1206 C g还（-1）和优异的循环性能有类似于92％的保留令人满意的比电容10000次循环之后。此外，非对称超电容器（ASC），其中MCS @ CN LDH和N掺杂RGO被用作正极和负极，组装其表现出48.8 W时千克（-1）具有优异的能量密度循环稳定性，表明在实际的能量存储该电极的电势。

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