Electrostatic Spray Deposition of Porous SnO2/Graphene Anode Films and Their Enhanced Lithium-Storage Properties

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• 作者：Yinzhu Jiang ; Tianzhi Yuan ; Wenping Sun ; Mi Yan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：November 28, 2012
• 年：2012
• 卷：4
• 期：11
• 页码：6216-6220
• 全文大小：331K
• 年卷期：v.4,no.11(November 28, 2012)
• ISSN：1944-8252

文摘

Porous SnO₂/graphene composite thin films are prepared as anodes for lithium ion batteries by the electrostatic spray deposition technique. Reticular-structured SnO₂ is formed on both the nickel foam substrate and the surface of graphene sheets according to the scanning electron microscopy (SEM) results. Such an assembly mode of graphene and SnO₂ is highly beneficial to the electrochemical performance improvement by increasing the electrical conductivity and releasing the volume change of the anode. The novel engineered anode possesses 2134.3 mA h g^鈥? of initial discharge capacity and good capacity retention of 551.0 mA h g^鈥? up to the 100th cycle at a current density of 200 mA g^鈥?. This anode also exhibits excellent rate capability, with a reversible capacity of 507.7 mA h g^鈥? after 100 cycles at a current density of 800 mA g^鈥?. The results demonstrate that such a film-type hybrid anode shows great potential for application in high-energy lithium-ion batteries.

Keywords:

electrochemical spray deposition; tin oxide; graphene; thin films; lithium ion battery