Open AccessLeaf‐Like Graphene‐Oxide‐Wrapped Sulfur for High‐Performance Lithium–Sulfur Battery
Author(s) -
Yuan Shouyi,
Guo Ziyang,
Wang Lina,
Hu Shuang,
Wang Yonggang,
Xia Yongyao
Publication year - 2015
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201500071
Subject(s) - graphene , materials science , sulfur , oxide , composite number , cycling , carbon nanotube , electrode , carbon fibers , lithium (medication) , conductivity , composite material , chemical engineering , battery (electricity) , nanotechnology , chemistry , metallurgy , medicine , power (physics) , physics , archaeology , quantum mechanics , endocrinology , engineering , history
Carbon/sulfur composites are attracting extensive attention because of their improved performances for Li–S batteries. However, the achievements are generally based on the low S‐content in the composites and the low S‐loading on the electrode. Herein, a leaf‐like graphene oxide (GO), which includes an inherent carbon nanotube midrib in the GO plane, is synthesized for preparing GO/S composites. Owing to the inherent high conductivity of carbon nanotube midribs and the abundant surface groups of GO for S‐immobilization, the composite with an S‐content of 60 wt% exhibits ultralong cycling stability over 1000 times with a low capacity decay of 0.033% per cycle and a high rate up to 4 C . When the S‐content is increased to 75 wt%, the composite still shows a perfect cycling performance over 1000 cycles. Even with the high S‐loading of 2.7 mg cm −2 on the electrode and the high S‐content of 85 wt%, it still shows a promising cycling performance over 600 cycles.