Vanadium Sulfide on Reduced Graphene Oxide Layer as a Promising Anode for Sodium Ion Battery

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• 作者：Ruimin Sun ; Qiulong Wei ; Qidong Li ; Wen Luo ; Qinyou An ; Jinzhi Sheng ; Di Wang ; Wei Chen ; Liqiang Mai
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 23, 2015
• 年：2015
• 卷：7
• 期：37
• 页码：20902-20908
• 全文大小：568K
• ISSN：1944-8252

文摘

As an alternative system of rechargeable lithium ion batteries, sodium ion batteries revitalize researchers鈥?interest due to the low cost, abundant sodium resources, and similar storage mechanism to lithium ion batteries. VS₄ has emerged as a promising anode material for SIBs due to low cost and its unique linear chains structure that can offer potential sites for sodium storage. Herein, we present the growth of VS₄ on reduced graphene oxide (rGO) as SIBs anode for the first time. The VS₄/rGO anode exhibits promising performance in SIBs. It delivers a reversible capacity of 362 mAh g^鈥? at 100 mA g^鈥? and a good rate performance. We also investigate the sodium storage behavior of the VS₄/rGO. Different than most transition metal sulfides, the VS₄/rGO composite experiences a three-step separation mechanism during the sodiation process (VS₄ to metallic V and Na₂S, then the electrochemical mechanism is akin to Na鈥揝). The VS₄/rGO composite proves to be a promising material for rechargeable SIBs.