Biomass-derived nitrogen-doped hierarchical porous carbon as efficient sulfur host for lithium–sulfur batteries

By Qinghuiqiang Xiao, Gaoran Li, Minjie Li, Ruiping Liu, Hai-bo Li, Pengfei Ren, Yue Dong, M. Feng, Zhongwei Chen. Journal of Energy Chemistry, 2020

176 citations recorded by the source corpus.

Abstract Lithium–sulfur (Li–S) battery is a potential energy storage technology with high energy density and low cost. However, the gap between theoretical expectation and practical performance limits its wide implementation. Herein, we report a nitrogen-doped porous carbon derived from biomass pomelo peel as sulfur host material for Li–S batteries. The hierarchical porous architecture and the polar surface introduced by N-doping render a favorable combination of physical and chemical sulfur confinements as well as an expedite electron/ion transfer, thus contributing to a facilitated and stabilized sulfur electrochemistry. As a result, the corresponding sulfur composite electrodes exhibit an ultrahigh initial capacity of 1534.6 mAh g−1, high coulombic efficiency over 98% upon 300 cycles, and decent rate capability up to 2 C. This work provides an economical and effective strategy for the fabrication of advanced carbonaceous sulfur host material as well as the significant improvement of Li–S battery performance.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/1861726483df13c2d70975431a7a96e7ca2ab71d