Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 286, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2022.115988
Keywords
Cathode material; Li1.2V3O8; Li1.2V2.97Sn0.03O8; Sn doping; Sol-gel method
Funding
- Youth Project of Natural Science Foundation of Anhui Province [1908085QB61]
- Innova- tive Project of Training of ?
- Excellent Talents of Anhui Province [2019zyrc075]
- Foundation of-State Key Laboratory of High -efficiency Utilization of Coal and-Green Chemical Engineering [2022-K65]
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The discharge capacity and performance at high current density of Li1.2V3O8 are improved by Sn4+ doping.
The discharge capacity of Li1.2V3O8 is obviously decreased, and the diffusion coefficient of lithium ion is relatively low. In order to improve the electrochemical performances of Li1.2V3O8, the study of Sn4+ doped Li1.2V3O8 is performed. The initial discharge capacity of Li1.2V2.97Sn0.03O8 is lower than that of Li1.2V3O8. However, the discharge capacity of Li1.2V2.97Sn0.03O8 is higher than that of Li1.2V3O8 from the second cycle, and the discharge capacity of Li1.2V2.97Sn0.03O8 are significantly improved at high current density. At 50, 100 and 200 mA g(-1), the discharge capacities of Li1.2V2.97Sn0.03O8 are 271.8, 268 and 257.2 mAh g(-1), respectively. The discharge capacity is maintained at 264.7, 259.6 and 238.3 mAh g(-1), after 50 cycles at room temperature. Furthermore, the electrochemical reactivity of vanadium in Li1.2V3O8 electrodes could be improved by Sn4+ doping. Thus, the electrochemical reaction kinetics and the electrochemical properties of Li1.2V2.97Sn0.03O8 are improved.
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