Enhanced cycling performance of lithium-ion batteries with V2O5 as cathode by Co-doping for structural stability

The high capacity and cycling performance are important for the lithium-ion battery (LIB). V 2 O 5 is considered a good active material among various potential candidates due to its low cost, abundant availability, and high energy density, however, the disadvantage of lower cycling performance is di...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2024, Vol.54 (7), p.1473-1484
Main Authors: Yuan, Baohe, Yuan, Xiang, An, Zheng, Zhang, Binger, Luo, Shijun, Chen, Lulu, Liu, Xiansheng
Format: Article
Language:English
Subjects:
Cathodes
Chemistry
Chemistry and Materials Science
Current density
Cycles
Electrochemistry
Electrode materials
Industrial Chemistry/Chemical Engineering
Lithium-ion batteries
Microspheres
Physical Chemistry
Rechargeable batteries
Research Article
Structural stability
Vanadium pentoxide
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Summary:The high capacity and cycling performance are important for the lithium-ion battery (LIB). V 2 O 5 is considered a good active material among various potential candidates due to its low cost, abundant availability, and high energy density, however, the disadvantage of lower cycling performance is difficult to solve due to structural instability during the charging and discharging process. Here, we prepared composite microspheres of Co-doped V 2 O 5 by a simple solvothermal method for solving structural instability. As the cathode material in LIBs, the V 2 O 5 -Co 0.1 composite microspheres exhibit a specific capacity of 171 mAhg −1 at a current density of 0.08 Ag −1 (except for the first cycle). After 10 cycles, the specific capacity of V 2 O 5 -Co 0.1 composite microspheres did not change, it exhibited better cycling stability. When the current density is increased to 0.1 Ag −1 and 0.3 Ag −1 , 241 mAhg −1 and 200 mAhg −1 specific capacities are obtained. Although the initial specific capacity of pure V 2 O 5 microspheres was higher than that of V 2 O 5 -Co 0.1 , its capacity retention after cycling was 86%, which was lower than that of V 2 O 5 -Co 0.1 . The reason for the enhanced stability of V 2 O 5 -Co 0.1 composite microspheres is that Co ions are fixed between the layered structures of V 2 O 5 , which increases the stability of the V 2 O 5 structure. Graphical Abstract
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-023-02050-3