Large-scale fabrication of reduced graphene oxide-sulfur composite films for flexible lithium-sulfur batteries

• 作者: Linlin Zhang Minjie Yao Yue Liu Zhiqiang Niu
• 来源期刊: 能源化学
• 年，卷（期）: 2019,（11）
• 页码范围: 199-206
• 页数: 8页
• 语种: 英文

摘要

The rapid development of flexible electronic devices requires the design of flexible energy-storage devices.Lithium-sulfur (Li-S) batteries are attracting much interest due to their high energy density.Therefore,flexible Li-S batteries with high areal capacity are desired.Herein,we fabricated freestanding reduced graphene oxide-sulfur (RGO@S) composite films with a cross-linked structure using a blade coating technique,followed by a subsequent chemical reduction.The porous cross-linked structure endows the com-posite films with excellent electrochemical performance.The batteries based on RGO@S composite films could exhibit a high discharge capacity of 1381 mAh/g at 0.1 C and excellent cycle stability.Furthermore,the freestanding composite film possesses excellent conductivity and high mechanical strength.Therefore,they can be used as the cathodes of flexible Li-S batteries.As a proof of concept,soft-packaged Li-S batteries were assembled and remained stable electrochemical performance under different bending states.