High performance of solvothermally prepared VO2(B) as anode for aqueous rechargeable lithium batteries

• Main Authors: Milošević Sanja, Stojković Ivana, Mitrić Miodrag, Cvjetićanin Nikola
• Format: Article
• Language: English
• Published: Serbian Chemical Society 2015-01-01
• Series: Journal of the Serbian Chemical Society
• Subjects: aqueous rechargeable lithium batteries; anode materials; discharge capacity; electrochemical impedance spectroscopy; electric conductivity
• Online Access: http://www.doiserbia.nb.rs/img/doi/0352-5139/2015/0352-51391400128M.pdf
• ISSN: 0352-5139; 1820-7421

The VO2 (B) was synthesized via a simple solvothermal route at 160oC in ethanol. The initial discharge capacity of VO2 (B) anode, in saturated aqueous solution of LiNO3, was 177 mAh g-1 at a current rate of 50 mA g-1. After 50 cycles capacity fade was 4%, but from 20th-50th cycle no capacity drop was observed. The VO2 (B) has shown very good cyclability at current rate of even 1000 mA g-1 with initial discharge capacity of 92 mAh g-1. The excellent electrochemical performance of VO2 (B) was attributed to the stability of micro-nano structures to repeated intercalation /deintercalation process, very good electronic conductivity as well as the very low charge transfer resistance in the aqueous electrolyte. [Projekat Ministarstva nauke Republike Srbije, br. III45014]