文献类型：期刊文献

英文题名：Infixing NiS2 nanospheres into a three-dimensional rGO/CNTs-Li carbon composite as superior electrocatalyst for high-performance Li-S batteries

作者：Wang, Juan[1];Xu, Jie[1];Tang, Weiqiang[1];Niu, Dongfang[1];Zhao, Shuangliang[1];Hu, Shuozhen[1];Zhang, Xinsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：6

期号：6

起止页码：976

外文期刊名：CHEMNANOMAT

收录：;EI(收录号：20201808588505);WOS:【SCI-EXPANDED(收录号:WOS:000537588000016)】；

语种：英文

外文关键词：synergistic effect; polysulfide electrocatalysis; modified separator; Li-S batteries

摘要：A novel flexible three-dimensional (3D) architecture of lithiated carbon nanotubes (CNTs-Li) interlacing reduced graphene oxide (rGO) loaded with NiS2 (denoted as NiS2@rGO/CNTs-Li) was rationally designed and implemented as interlayer with dual functions to suppress lithium polysulfides (LiPSs) shuttle and enhance redox kinetics for high-performance Li-S batteries. In our design, the introduced rGO and CNTs-Li serve as the conductive skeleton for facilitating the fast electron/ion transfer, while the infixing NiS2 catalyst could synchronously entrap the soluble LiPSs and speed up their interconversion. The chemical interaction between NiS2 and LiPSs and the redox kinetics were probed by density functional theory (DFT) calculations and electrochemical measurements, respectively. Benefiting from the synergistic effect of 3D conductive skeleton and polar NiS2 catalyst, the cell with the NiS2@rGO/CNTs-Li modified separator exhibits a high initial capacity of 1515 mA h g(-1) at 0.2 C and an excellent long-term cycling stability up to 600 cycles with a low decay rate of 0.071% at 2.0 C.