Sodium ion storage in reduced graphene oxide

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• 作者：Nanjundan Ashok Kumar ; ¹ ; ^{ashok.nanjundan@uq.edu.au" class="auth_mail" title="E-mail the corresponding author} ; Rohit Ranganathan Gaddam¹ ; Srinivasa Rao Varanasi ; Dongfang Yang ; Suresh K. Bhatia ; X.S. Zhao ; ^{george.zhao@uq.edu.au" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Graphene oxide ; Metal reduction ; Anode ; Sodium-ion battery ; Stability
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 October 2016
• 年：2016
• 卷：214
• 期：Complete
• 页码：319-325
• 全文大小：1492 K

文摘

The performance of few-layered metal-reduced graphene oxide (RGO) as a negative electrode material in sodium-ion battery was investigated. Experimental and simulation results indicated that the as-prepared RGO with a large interlayer spacing and disordered structure enabled significant sodium-ion storage, leading to a high discharge capacity. The strong surface driven interactions between sodium ions and oxygen-containing groups and/or defect sites led to a high rate performance and cycling stability. The RGO anode delivered a discharge capacity of 272 mA h g⁻¹ at a current density of 50 mA g⁻¹, a good cycling stability over 300 cycles and a superior rate capability. The present work provides new insights into optimizing RGOs for high-performance and low-cost sodium-ion batteries.