Influence of graphene oxide on electrochemical performance of Si anode material for lithium-ion batteries

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• 作者：Wenjing Liu^a ; Jinjin Jiang^a ; Hao Wang^a ; ^b ; Chunxiao Deng^a ; ^b ; Feng Wang^a ; Gongchang Peng^a ; ^{Pgc0370@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Si/graphene oxide ; Electrochemical performance ; High-performance batteries ; Capacity retention
• 刊名：Journal of Energy Chemistry
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：25
• 期：5
• 页码：817-824
• 全文大小：4799 K

文摘

We have developed a Si/graphene oxide electrode synthesized via ultrasonication-stirring method under alkaline condition. Scanning electron microscopy (SEM), transmission electron microscope (TEM), EDS dot-mapping and high-resolution transmission electron microscopy (HRTEM) results show that Si particles are evenly dispersed on the graphene oxide sheets. The electrochemical performance was investigated by galvanostatic charge/discharge tests at room temperature. The results revealed that Si/graphene oxide electrode exhibited a high reversible capacity of 2825 mAh/g with a coulombic efficiency of 94.6% at 100 mA/g after 15 cycles and a capacity retention of 70.8% after 105 cycles at 4000 mA/g. These performance parameters show a great potential in the high-performance batteries application for portable electronics, electric vehicles and renewable energy storage.