A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

Beilstein Journal of Nanotechnology

Yan Zhao^1¹  Yongguang Zhang^1²  Jun Ren^1³ 

[1] School of Life and Environmental Sciences, Deakin University, Geelong, Vic 3216, Australia^3;School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China^1;Synergy Innovation Institute of GDUT, Heyuan, Guangdong Province, China^2

关键词: carbon nanotubes;    energy storage and conversion;    Li–S batteries;    nanocomposites;   

DOI  :  10.3762/bjnano.10.52

学科分类：地球科学(综合)

来源: Beilstein - Institut zur Foerderung der Chemischen Wissenschaften

【 摘 要 】

In this work, a unique three-dimensional (3D) structured carbon-based composite was synthesized. In the composite, multiwalled carbon nanotubes (MWCNT) form a lattice matrix in which porous spherical reduced graphene oxide (RGO) completes the 3D structure. When used in Li–S batteries, the 3D porous lattice matrix not only accommodates a high content of sulfur, but also induces a confinement effect towards polysulfide, and thereby reduces the “shuttle effect”. The as-prepared S-3D-RGO@MWCNT composite delivers an initial specific capacity of 1102 mAh·g⁻¹. After 200 charging/discharge cycles, a capacity of 805 mAh·g⁻¹ and a coulombic efficiency of 98% were maintained, implying the shuttle effect was greatly suppressed by the composite matrix. In addition, the S-3D-RGO@MWCNT composite also exhibits an excellent rate capability.

【 授权许可】

CC BY