Facile Approach to Prepare Porous CaSnO3 Nanotubes via a Single Spinneret Electrospinning Technique as Anodes for Lithium Ion Batteries

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• 作者：Linlin Li ; Shengjie Peng ; Jin Wang ; Yan Ling Cheah ; Peifen Teh ; Yahwen Ko ; Chuiling Wong ; Madhavi Srinivasan
• 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：6005-6012
• 全文大小：479K
• 年卷期：v.4,no.11(November 28, 2012)
• ISSN：1944-8252

文摘

CaSnO₃ nanotubes are successfully prepared by a single spinneret electrospinning technique. The characterized results indicate that the well-crystallized one-dimensional (1D) CaSnO₃ nanostructures consist of about 10 nm nanocrystals, which interconnect to form nanofibers, nanotubes, and ruptured nanobelts after calcination. The diameter and wall thickness of CaSnO₃ nanotubes are about 180 and 40 nm, respectively. It is demonstrated that CaSnO₃ nanofiber, nanotubes, and ruptured nanobelts can be obtained by adjusting the calcination temperature in the range of 600鈥?00 掳C. The effect of calcination temperature on the morphologies of electrospun 1D CaSnO₃ nanostructures and the formation mechanism leading to 1D CaSnO₃ nanostructures are investigated. As anodes for lithium ion batteries, CaSnO₃ nanotubes exhibit superior electrochemical performance and deliver 1168 mAh g^鈥? of initial discharge capacity and 565 mAh g^鈥? of discharge capacity up to the 50th cycle, which is ascribed to the hollow interior structure of 1D CaSnO₃ nanotubes. Such porous nanotubular structure provides both buffer spaces for volume change during charging/discharging and rapid lithium ion transport, resulting in excellent electrochemical performance.

Keywords:

CaSnO₃ nanotubes; CaSnO₃ nanofibers; electrospinning; lithium ion batteries; anodes; electrochemical performance