期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 33, 页码 17432-17441出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta02761c
关键词
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资金
- Program for Key R&D plan of Hunan Province [2015JC3091]
- National Natural Science Foundation of China [21376069, 21576075]
- Hunan Provincial Education Department [17A205]
Hierarchical Mg-doped V2O5@carbon (HVC) spheres were fabricated using poly(methacrylic acid) (PMAA) microgel as a microreactor. The monodisperse micron-sized spheres are formed from 200 nm particles, in which primary V2O5 nanoparticles are embedded uniformly in a carbon matrix to form a mulberry-like morphology. The effect of the Mg-doping level on the electrochemical properties of the as-prepared HVC spheres was studied. Benefitting from the unique morphology and chemical pre-insertion of Mg2+ ions, the Mg0.10V2O5@C sample exhibited an excellent rate capability and stable cyclability when operated over the potential range of 1.5-4.0 V (vs. Li+/Li). The results suggest that these porous HVC spheres hold promise for use as high-energy-density cathode materials for rechargeable lithium batteries.
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