2D conductive MOFs with sufficient redox sites: reduced graphene oxide/Cu-benzenehexathiolate composites as high capacity anode materials for lithium-ion batteries

Chunfeng Meng; Pinfei Hu; Hantao Chen; Yueji Cai; Hu Zhou; Zehong Jiang; Xiang Zhu; Zeyu Liu; Chengyin Wang; Aihua Yuan

doi:10.1039/d0nr08549a

2D conductive MOFs with sufficient redox sites: reduced graphene oxide/Cu-benzenehexathiolate composites as high capacity anode materials for lithium-ion batteries

Nanoscale. 2021 Apr 30;13(16):7751-7760. doi: 10.1039/d0nr08549a.

Authors

Chunfeng Meng¹, Pinfei Hu², Hantao Chen², Yueji Cai², Hu Zhou¹, Zehong Jiang², Xiang Zhu³, Zeyu Liu², Chengyin Wang⁴, Aihua Yuan²

Affiliations

¹ School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China.
² School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China. aihua.yuan@just.edu.cn.
³ Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China.
⁴ School of Chemical and Chemistry Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, P. R. China.

PMID: 33861280
DOI: 10.1039/d0nr08549a

Abstract

As a superconductive metal-organic framework (MOF) material, Cu-BHT (BHT: benzenehexathiol) can exhibit outstanding electrochemical properties owing to the potential redox reactions of the cuprous ions, sulfur species and benzene rings of Cu-BHT, but its compact texture limits the specific capacity of Cu-BHT. To improve the dense feature of Cu-BHT, rGO/Cu-BHT (rGO: reduced graphene oxide) composite materials are fabricated via a facile route and they exhibit applicable conductivities, improved lithium ion diffusion kinetics compared to pristine Cu-BHT, and sufficient redox sites. The rGO/Cu-BHT composite materials maximize the potential capacity of Cu-BHT, and the rGO/Cu-BHT 1 : 1 material achieves outstanding reversible specific capacities of 1190.4, 1230.8, 1131.4, and 898.7 mA h g-1, at current densities of 100, 200, 500, and 1000 mA g-1, respectively, superior to those of pristine Cu-BHT and rGO. These results present the promising future of 2D conductive MOFs as functional materials for energy storage, based on the regulation of electronic conductivity, redox sites, and lithium ion diffusion kinetics.