Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7995079 | Journal of Alloys and Compounds | 2018 | 5 Pages |
Abstract
Transition metal borates, attracting researchers to investigate whether they can exhibit Li cycling similar to the metal oxides, were criticized for their poor electrochemical reversibility. Herein, citric acid assisted sol-gel technique had been used to synthesize high-performance VBO3 anode for Li-ion batteries. High-purity and well-crystallized VBO3 particles covered with amorphous carbon layer (VBO3/carbon) were applied as electrodes for both rechargeable Li and Na batteries. In the Li system, the VBO3/carbon composite delivered a high reversible capacity of 859.5 mA h gâ1 in the first cycle, and showed an outstanding rate ability of â¼720 mA h gâ1 even at a current density of 200 mA gâ1, which suggests both V and B in VBO3 had participated in the electrochemical redox reaction during the Li intercalation and extraction. However, the Na storage of VBO3/carbon after conversion reaction exhibited typical capacitance behavior but poor electrochemical reversibility.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Dongfang Wu, Quan Kuang, Yanming Zhao, Shenghong Liu, Qinghua Fan,