Efficient Synthesis of Graphene Nanoscrolls for Fabricating Sulfur-Loaded Cathode and Flexible Hybrid Interlayer toward High-Performance Li–S Batteries

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• 作者：Yi Guo ; Gang Zhao ; Naiteng Wu ; Yun ZhangMingwu Xiang ; Bo Wang ; Heng Liu ; Hao Wu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：December 21, 2016
• 年：2016
• 卷：8
• 期：50
• 页码：34185-34193
• 全文大小：780K
• ISSN：1944-8252

文摘

A modified lyophilization approach is developed and used for highly efficient transformation of 2D graphene oxide sheet into 1D graphene nanoscroll (GNS) with high topological transforming efficiency (∼94%). Because of the unique open tubular structure and large specific surface area (545 m² g^–1), GNS is utilized for the first time as a porous cathode scaffold for encapsulating sulfur with a high loading (81 wt %), and also as a conductive skeleton for assembling MnO₂ nanowires into a flexible free-standing hybrid interlayer, both enabling high-rate and long-life Li–S battery.