A Mild Strategy to Strengthen Three Dimensional Graphene Aerogel for Supporting Sulfur as a Free‐standing Cathode in Lithium–Sulfur Batteries

Bulletin of the Korean Chemical Society

Yinglin Yan¹ 

[1] Institute of Chemical Power Sources, Collaborative Innovation Center of Modern Equipment and Green Manufacturing School of Materials Science and Engineering, Xi'an University of Technology Xi'an 710048 People's Republic of China

关键词: Li?S batteries;    3D graphene aerogel;    Ammonia strengthening;    Electrochemical performance;   

DOI  :  10.1002/bkcs.11438

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Recently, three dimensional graphene aerogel (3DGA) supported sulfur microparticles was used as a cathode material for lithium–sulfur batteries, which was considered as one of the most promising next generation rechargeable batteries due to its ultra‐high theoretical specific capacity (1675 mAh/g). However, the mechanical strength of 3DGA remains an issue for further application. Herein, a strengthened 3DGA (S3DGA) was achieved by soaking in a low concentration ammonia solution at a relative low temperature. Then the S3DGA loaded sulfur (S3DGA‐S) was cut into a round piece and directly used as a cathode without additional binders or conductive additives in LiS batteries. The mechanical strength, microstructure, and electrochemical properties were investigated by compare with a 3DGA prepared without strengthen. The S3DGA‐S presented good mechanical strength, excellent capacity retention, and lower electrochemical impedance.

【 授权许可】

Unknown