Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7995086 | Journal of Alloys and Compounds | 2018 | 22 Pages |
Abstract
Owing to the excellent power density, energy storage capability, and rechargeable nature, lithium-ion batteries are being used in laptops, vehicles, home electronics and large-scale industrial instruments, and thus governing the market of portable electronics. Here, we present the electrochemical performance of the V2O5/acetylene black (V2O5/C) nanocomposite, used as a cathode material in lithium-ion batteries, prepared by a facile chemical synthesis route. The nanocomposite shows an outstanding electrochemical performance with a discharge capacity of 361Â mAh gâ1 during 1st cycle and retains a capacity of 254Â mAh gâ1 after 100 cycles, at a step rate of 0.1Â C. Further, electrochemical impedance spectroscopy was employed to examine the reaction kinetics before and after cycling and the Li+-diffusion coefficient was calculated to be 1.67Â ÃÂ 10â12 and 6.13Â ÃÂ 10â15Â cm2Â sâ1, respectively. The enhanced electrochemical performance of V2O5/C nanocomposite can be ascribed to the synergistic effect of nanosized V2O5 and conductive acetylene black, which could shorten diffusion pathway, play a role of efficient charge carrier and make the electrode have better electronic/ionic conductivity and lower resistance. Hence, V2O5/C nanocomposite could be utilised as promising cathode material for lithium-ion batteries because of its stable electrochemical performance.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Muhammad Haris, Shahid Atiq, Syed Mustansar Abbas, Asif Mahmood, Shahid Mahmood Ramay, Shahzad Naseem,