Effect of TiO₂Coating on Electrochemical Performance of V₂O₅Li-Ion Battery Anode Materials AITranslate

2冯婷,王睿,王京玥,王磊营,石沁灵,王立帆,詹纯.压电材料K_(0.5)Na_(0.5)NbO_(3)表面修饰高镍正极材料LiNi_(0.83)Co_(0.12)Mn_(0.05)O_(2)的电化学性能研究[J].稀有金属与硬质合金,2022,50(5):89-95. 被引量：1

10Yingze Song,Luwei Zou,Chaohui Wei,Yu Zhou,Yue Hu.Single-atom electrocatalysts for lithium-sulfur chemistry:Design principle,mechanism,and outlook[J].碳能源(英文),2023,5(4):13-41.

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Chinese Library Classification Number:TB34[一般工业技术—材料科学与工程]

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Using ammonium metavanadate as V raw material and tetrabutyl phthalate as Ti raw material,micron-sized flower ball V₂O₅@TiO₂composites in network shape were prepared by hydrothermal reaction and calcination at 350℃.The electrochemical performance of V₂O₅@TiO₂composites as anode materials for lithium-ion batteries was tested.The results show that under the condition of constant current chargedischarge current density of 100 mA/g,the specific discharge capacity of particulate V₂O₅is 270 mA·h/g with a capacity retention rate of 50.2%after 300 cycles,while the specific discharge capacity of V₂O₅@TiO₂composites is as high as 619.9 mA·h/g with the capacity retention rate of 160.7%under the same test conditions.The ability of V₂O₅@TiO₂composites to maintain a high specific discharge capacity during long-term cycling is mainly attributed to the coating of TiO₂that acts as a protective layer,which inhibits the dissolution of V₂O₅in the electrolyte and reduces the stress of Li+insertion/extraction,slowing down the degradation of the V₂O₅structure.The results of this study provide a simple and effective method for the preparation and surface modification of V₂O₅as anode materials for lithium-ion batteries.