Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7727016 | Journal of Power Sources | 2016 | 7 Pages |
Abstract
Three-dimensional Li2S/graphene hierarchical architecture (3DLG) is synthesized with a facile infiltration method. Highly-crystalline Li2S nanoparticles are deposited homogenously into three-dimensional graphene foam (3DGF) network grown by chemical vapor deposition (CVD), resulting in 3DLG with high surface area, porosity, flexibility and conductivity. The 3DLG is employed as flexible, free-standing and binder-free cathode without metallic current collectors or conducting additives. Due to the unique structure, the 3DLG exhibits a high discharge capacity of 894.7Â mAh gâ1 at 0.1Â C, a high capacity retention of 87.7% after 300 cycles at 0.2Â C, and the high-rate capacity up to 4Â C reaches 598.6Â mAh gâ1. The cyclic performance is record-breaking compared to the previous reports on free-standing graphene-Li2S cathodes. Flexible lithium-sulfur batteries based on the high-capacity 3DLG cathode have promising application potentials in flexible electronics, electrical vehicles, etc.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jiarui He, Yuanfu Chen, Weiqiang Lv, Kechun Wen, Pingjian Li, Fei Qi, Zegao Wang, Wanli Zhang, Yanrong Li, Wu Qin, Weidong He,