Microwave-assisted synthesis of graphene-SnO₂ nanocomposite for rechargeable lithium-ion batteries

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• 作者：Hongling Lu ; Nianwu Li ; Mingbo Zheng ; Lan Qiu ; Songtao Zhang ; Jiafei Zheng ; Guangbin Ji ; Jieming Cao
• 关键词：Tin oxide ; Graphene ; Nanocomposite ; Porous materials ; Anode material
• 刊名：Materials Letters
• 出版年：15 January, 2014
• 年：2014
• 卷：115
• 期：Complete
• 页码：125-128
• 全文大小：1472 K

文摘

Graphene-SnO₂ nanocomposite was rapidly synthesized by a microwave-assisted method without using any additive. The as-prepared nanocomposite exhibits excellent electrochemical performance for lithium-ion batteries. Results show that the graphene-SnO₂ nanocomposite with 70 wt% SnO₂ content exhibits a stable capacity of about 890 mA h g^鈭? without noticeable fading for up to 80 cycles at a current density of 500 mA g^鈭?. Even when cycled at a high current density of 1000 mA g^鈭?, the specific capacity still remains approximately 790 mA h g^鈭?. The good electrochemical performance can be attributed to the porous structure of the nanocomposite and the restriction effect of graphene on the volume change of SnO₂ nanoparticles.