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Spacing graphene and Ni-Co layered double hydroxides with polypyrrole for high-performance supercapacitors
Journal of Materials Science & Technology ( IF 10.9 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.jmst.2019.10.030
Jing Liang , Cuili Xiang , Yongjin Zou , Xuebu Hu , Hailiang Chu , Shujun Qiu , Fen Xu , Lixian Sun

The urgent need of high-performance of energy storage devices triggers us to design newly class of materials. Generally, the materials feature with high conductivity, abundant pores and excellent stability. Here, a sandwiched hybrid composite containing reduced graphene oxide, polypyrrole and Ni-Co layered double hydroxides (RGO/PPy/NiCo-LDH) was prepared in a facile way. The polypyrrole was incorporated in the two dimensional (2D) nanosheets, which not only serve as the spacer to increase the surface area, but also enhance the conductivity of the nanocomposite. The obtained architecture was employed as an advanced electrode in a supercapacitor. The electrode shows an ultrahigh specific capacitance (2534 F g−1 at 1 A g −1) and good cycling efficiency (78 % after 5000 cycles). Moreover, an asymmetric cell based RGO/PPy/NiCo-LDH composite demonstrates excellent electrochemical properties and good prospect of practical use.



中文翻译:

间隔石墨烯和Ni-Co层状双氢氧化物与聚吡咯的高性能超级电容器

对高性能储能设备的迫切需求促使我们设计新的材料类别。通常,该材料具有高导电性,丰富的孔和优异的稳定性。在此,以简便的方式制备了包含还原的氧化石墨烯,聚吡咯和Ni-Co层状双氢氧化物(RGO / PPy / NiCo-LDH)的夹心杂化复合材料。将聚吡咯掺入二维(2D)纳米片中,其不仅用作间隔物以增加表面积,而且还增强了纳米复合材料的电导率。所获得的架构被用作超级电容器中的高级电极。该电极所示的超高比电容(2534 F G -1 1 A G -1)和良好的循环效率(5000次循环后为78%)。而且,基于不对称电池的RGO / PPy / NiCo-LDH复合材料表现出优异的电化学性能和良好的实用前景。

更新日期:2020-01-08
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