文献类型：期刊文献

英文题名：Sandwich-like NiCo-LDH/rGO with rich mesopores and high charge transfer capability for flexible supercapacitors

作者：Wang, Jiaqi[1];Luo, Yuancong[1];Ling, Lei[1];Wang, Xue[1];Cui, Shicong[2];Li, Zhen[3];Jiao, Zheng[3];Cheng, Lingli[1]

机构：[1]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[2]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]Shanghai Univ, Shanghai Appl Radiat Inst, Shanghai 201800, Peoples R China

年份：2022

卷号：24

期号：27

起止页码：4962

外文期刊名：CRYSTENGCOMM

收录：;EI(收录号：20222712307336);WOS:【SCI-EXPANDED(收录号:WOS:000815223800001)】；

基金：J. Q. Wang, Y. C. Luo and L. Ling contributed equally to this work. This work was supported by the Belt and Road Initiatives International Cooperation Project (No. 20640770300) and the Shanghai Technical Service Center for Advanced Ceramics Structure Design and Precision Manufacturing (No. 20DZ2294000).

语种：英文

外文关键词：Agglomeration - Charge transfer - Energy storage - Precipitation (chemical)

摘要：Layered double metal hydroxides (LDHs) have been widely used in the energy storage field due to their adjustable composition and interlayer spacing. However, easy agglomeration, poor electrical conductivity, and large volume changes during charge/discharge inhibit the application of LDH materials in the direction of supercapacitors. Herein, a sandwich-like NiCo-LDH/rGO composite is designed and prepared by a facile precipitation method, in which NiCo-LDHs grow vertically and uniformly on both sides of rGO. The novel sandwich structure of NiCo-LDH/rGO inhibits the agglomeration of NiCo-LDHs. And the interlaminar voids of NiCo-LDHs lead to the mesoporous morphology of the composites, which can alleviate the volume change stress during phase transition. Moreover, the work function difference between NiCo-LDHs and rGO causes the rapid charge transfer on the interface of NiCo-LDH/rGO composites. The electrochemical performance tests show that the as-prepared NiCo-LDH/rGO has a high specific capacity (2026.8 F g(-1) at 1 A g(-1) and 1425.6 F g(-1) at 30 A g(-1)) and excellent cycling stability. The assembled flexible capacitor (NiCo-LDH/rGO//YP-50) exhibits a high energy density (52.0 W h kg(-1) at a power density of 800 W kg(-1)) and outstanding cycle life (70% specific capacitance retention after 20 000 cycles). Our work designs a high energy density flexible supercapacitor by constructing a vertically grown LDH multistage structure on carbon materials, which provides new insight into the wearable energy storage field.