Boric Acid Assisted Reduction of Graphene Oxide: A Promising Material for Sodium-Ion Batteries

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• 作者：Ying Wang ; Caiyun Wang ; Yijing Wang ; Huakun Liu ; Zhenguo Huang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 27, 2016
• 年：2016
• 卷：8
• 期：29
• 页码：18860-18866
• 全文大小：538K
• 年卷期：0
• ISSN：1944-8252

文摘

Reduced graphene oxide, an intensively investigated material for Li-ion batteries, has shown mostly unsatisfactory performance in Na-ion batteries, since its d-spacing is believed to be too small for effective insertion/deinsertion of Na⁺ ions. Herein, a facile method was developed to produce boron-functionalized reduced graphene oxide (BF-rGO), with an enlarged interlayer spacing and defect-rich structure, which effectively accommodates the sodiation/desodiation and provides more active sites. The Na/BF-rGO half cells exhibit unprecedented long cycling stability, with ∼89.4% capacity retained after 5000 cycles (0.002% capacity decay per cycle) at 1000 mA·g^–1 current density. High specific capacity (280 mAh·g^–1) and great rate capability were also delivered in the Na/BF-rGO half cells.