Synthesis and Enhanced Lithium Storage Properties of Electrospun V2O5 Nanofibers in Full-Cell Assembly with a Spinel Li4Ti5O12 Anode

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• 作者：Yan Ling Cheah ; Vanchiappan Aravindan ; Srinivasan Madhavi
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：April 24, 2013
• 年：2013
• 卷：5
• 期：8
• 页码：3475-3480
• 全文大小：383K
• 年卷期：v.5,no.8(April 24, 2013)
• ISSN：1944-8252

文摘

We have successfully demonstrated the reversible electrochemical Li-insertion properties of electrospun vanadium pentoxide nanofibers (VNF) in full-cell assembly with a Li₄Ti₅O₁₂ anode. Li-insertion in to VNF is restricted for the intercalation of 1 mol of Li by adjusting lower cutoff potential (2.5鈥? V vs Li). The half-cell (Li/VNF) delivered a reversible capacity of 148 mA h g^鈥? with excellent cycleability and capacity retention of over 85% after 30 cycles. Full-cell assembly is conducted for such VNF cathodes after the electrochemical lithiation (LiV₂O₅) with spinel Li₄Ti₅O₁₂ anode under the optimized mass loadings. Full-cell (LiV₂O₅/Li₄Ti₅O₁₂) delivered an excellent cycleability irrespective of applied current densities with good reversible capacity of 119 mA h g^鈥? (at 20 mA g^鈥? current density). This work clearly demonstrates the possibility of using LiV₂O₅/Li₄Ti₅O₁₂ configuration for high power applications such as hybrid electric vehicles and electric vehicles in the near future.

Keywords:

Li-ion battery; cathode; vanadium pentoxide nanofibers; spinel Li₄Ti₅O₁₂ anode; full-cell; electrospinning