Simple synthesis and electrochemical performance of V6O13 cathode materials as lithium-ion batteries
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V6O13 is synthesized by hydrothermal and solvothermal, respectively. The methods are compared to seek a simpler method for V6O13 synthesis. The results show that the best reaction time of hydrothermal-V6O13 is 3.5 h and the phase is pure. Compare with the solvothermal, the hydrothermal-V6O13 has smaller structure unit of about 100–200 nm, and there are also many pores, which is conducive to the transportation and storage of lithium ions. The results of charge-discharge test show that the electrochemical performance of hydrothermal-V6O13 is better than solvothermal-V6O13. The initial discharge capacity of hydrothermal-V6O13 is 319.2 mAh/g, and the retention rate is 50.5% after 100 cycles, which are 39.9 mAh/g and 12.6% higher than solvothermal-V6O13, respectively. The results of CV and EIS also confirm that hydrothermal-V6O13 has better electrochemical performance as lithium-ion batteries.
KeywordsLithium-ion batteries Cathode materials V6O13 Hydrothermal
This work was supported by the National Natural Science Foundation of China (No. 51562006).
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