Efficient Synthesis of Graphene Nanoscrolls for Fabricating Sulfur-Loaded Cathode and Flexible Hybrid Interlayer toward High-Performance Li-S Batteries

Yi Guo; Gang Zhao; Naiteng Wu; Yun Zhang; Mingwu Xiang; Bo Wang; Heng Liu; Hao Wu

doi:10.1021/acsami.6b13455

Efficient Synthesis of Graphene Nanoscrolls for Fabricating Sulfur-Loaded Cathode and Flexible Hybrid Interlayer toward High-Performance Li-S Batteries

ACS Appl Mater Interfaces. 2016 Dec 21;8(50):34185-34193. doi: 10.1021/acsami.6b13455. Epub 2016 Dec 8.

Authors

Yi Guo¹, Gang Zhao¹, Naiteng Wu¹, Yun Zhang¹, Mingwu Xiang¹, Bo Wang², Heng Liu¹, Hao Wu¹

Affiliations

¹ College of Materials Science and Engineering, Sichuan University , Chengdu 610064, P. R. China.
² MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin 15001, P.R. China.

PMID: 27998107
DOI: 10.1021/acsami.6b13455

Abstract

A modified lyophilization approach is developed and used for highly efficient transformation of 2D graphene oxide sheet into 1D graphene nanoscroll (GNS) with high topological transforming efficiency (∼94%). Because of the unique open tubular structure and large specific surface area (545 m² g^-1), GNS is utilized for the first time as a porous cathode scaffold for encapsulating sulfur with a high loading (81 wt %), and also as a conductive skeleton for assembling MnO₂ nanowires into a flexible free-standing hybrid interlayer, both enabling high-rate and long-life Li-S battery.

Keywords: free-standing hybrid interlayer; graphene nanoscroll; high sulfur loading; large surface area; lithium sulfur batteries.