Hydrogen reduced sodium vanadate nanowire arrays as electrode material of lithium-ion battery

• Published in: Journal of Central South University Vol. 26; no. 6; pp. 1540 - 1549
• Main Authors: Xu, Xue-liu, Li, Guang-zhong, Fu, Ze-wei, Hu, Jun-tao, Luo, Zhi-ping, Hua, Kang, Lu, Xue-qin, Fang, Dong, Bao, Rui, Yi, Jian-hong
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.06.2019; Springer Nature B.V
• Subjects: Arrays; Chemical composition; Chemical reduction; Crystal structure; Electrode materials; Electrodes; Engineering; Hydrothermal crystal growth; Lithium; Lithium-ion batteries; Metallic Materials; Morphology; Nanowires; Organic chemistry; Rechargeable batteries; Sodium compounds; Vanadates; Vanadium oxides; sodium vanadate; 钒酸钠; 锂离子电池; nanowire array; hydrogen reduction; lithium-ion battery; 纳米线阵列; 氢还原
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-019-4110-y

Vanadates and vanadium oxides are potential lithiumion electrode materials because of their easy preparation and high capacity properties. This paper reports the electrochemical lithium-storage performance of VO 2 and NaV 2 O 5 composite nanowire arrays. Firstly, Na 5 V 12 O 32 nanowire arrays are fabricated by a hydrothermal method, and then VO 2 and NaV 2 O 5 composite nanowire arrays are prepared by a reduction reaction of Na 5 V 12 O 32 nanowire arrays in hydrogen atmosphere. Crystal structure, chemical composition and morphology of the prepared samples are characterized in detail. The obtained composite is used as an electrode of a lithium-ion battery, which exhibits high reversible capacity and good cycle stability. The composite obtained at 500 °C presents a specific discharge capacity up to 345.1 mA × h/g after 50 cycles at a current density of 30 mA/g.