SnO2鈥揋raphene Composite Synthesized via an Ultrafast and Environmentally Friendly Microwave Autoclave Method and Its Use as a Superior Anode for Lithium-Ion Batteries

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• 作者：Chao Zhong ; Jiazhao Wang ; Zhixin Chen ; Huakun Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：December 22, 2011
• 年：2011
• 卷：115
• 期：50
• 页码：25115-25120
• 全文大小：972K
• 年卷期：v.115,no.50(December 22, 2011)
• ISSN：1932-7455

文摘

SnO₂鈥揼raphene composites have been synthesized by an ultrafast and environmentally friendly microwave autoclave method. From field emission scanning electron microscopy and transmission electron microscopy, it can be determined that the SnO₂ nanoparticles, around 4鈥? nm in diameter, are uniformly sandwiched between graphene nanosheets containing only a few layers. The successful synthesis demonstrates that in situ loading of SnO₂ nanoparticles can be an effective way to prevent graphene nanosheets from being restacked during the reduction. The Li-cycling properties of the materials have been evaluated by galvanostatic discharge鈥揷harge cycling and impedance spectroscopy. Results show that the SnO₂鈥揼raphene composite with a graphene content of 33.3 wt % exhibits a very stable capacity of about 590 mA h g^鈥? without noticeable fading for up to 200 cycles.