Electrospun porous vanadium pentoxide nanotubes as a high-performance cathode material for lithium-ion batteries. (10th August 2015)

• Record Type: Journal Article
• Authors: Li, Zhitong; Liu, Guoxue; Guo, Min; Ding, Liang-Xin; Wang, Suqing; Wang, Haihui
• Is Part Of: Electrochimica acta. Volume 173(2015)
• Page Start: 131
• Page End: 138
• Publication Date: 2015-08-10
• Subjects: vanadium pentoxide -- electrospinning -- lithium ion batteries -- nanotubes; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.05.057
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: The V2 O5 nanotubes are prepared by eletrospinning with using low-cost inorganic vanadium source. The as-prepared V2 O5 has porous, hollow and interconnected nanostructures. By controlling the annealing time, a small amount of carbon can be retained in V2 O5 nanotubes. The V2 O5 nanotubes with carbon exhibit excellent high rate performance and cycling stability. Abstract: In this work, porous vanadium pentoxide (V2 O5 ) nanotubes have been synthesized by a simple electrospinning technique followed by an annealing process with using low-cost inorganic vanadium precursor. By controlling the annealing time at 400 °C, a small amount of polymer pyrolysis carbon can be retained which improves the conductivity of the porous V2 O5 nanotubes. When evaluated as a cathode material for lithium ion batteries, the porous V2 O5 nanotubes delivered capacities of 114.9, 99.7 and 79.6 mAh g −1 at 10, 20 and 50C in the voltage range of 2.5-4.0 V, respectively. Moreover, the porous V2 O5 nanotubes display good cycling performance, the capacity retention is 97.4% after 200 cycles at 50C. The results indicate that fabricating nanostructured V2 O5 with a porous interconnected morphology is an effective way to improve the electrochemical performance of V2 O5 .