Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第6期    总第231期    2018年6月

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文章编号:1004-0609(2018)-06-1151-08
钠离子电池正极材料VO2(B)纳米带阵列的可控合成与电化学性能
秦牡兰,刘万民,张志成,徐星星

(湖南工程学院 化学化工学院,湘潭 411104)

摘 要: 以V2O5作为钒源,乙二醇作为结构导向剂和还原剂,在不使用模板的情况下,通过水热法制备VO2(B)纳米带阵列结构。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对合成产物的晶体结构和形貌进行表征,研究乙二醇的含量和水热反应时间对产物结构和形貌的影响。作为钠离子电池正极材料,研究水热反应时间和充放电电压范围对VO2(B)电化学性能的影响。结果表明:当乙二醇含量为10 mL时,在180 ℃水热反应6 h所合成的VO2(B)纳米带阵列在1.5~4 V的电压范围内具有更好的电化学性能。

 

关键字: 钠离子电池;正极材料;VO2(B);纳米带阵列;水热法

Controllable synthesis and electrochemical performance of VO2(B) nanobelt arrays as cathode materials for sodium-ion batteries
QIN Mu-lan, LIU Wan-min, ZHANG Zhi-cheng, XU Xing-xing

School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China

Abstract:VO2(B) nanobelt arrays were synthesized by hydrothermal method with V2O5 as vanadium source and ethylene glycol as structure-directing agent and reductant, without using template. The crystal structure and morphology of synthesized VO2(B) were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The influences of ethylene glycol content and reaction time on structure and morphology of synthesized product were studied. As cathode materials for sodium-ion batteries, the effects of reaction time and charge-discharge voltage range on the electrochemical performance of synthesized VO2(B) were further researched. The results show that VO2(B) nanobelt arrays synthesized at 180 ℃ for 6 h using 10 mL ethylene glycol have better electrochemical performance in the voltage range of 1.5-4 V.

 

Key words: sodium-ion battery; cathode material; VO2(B); nanobelt array; hydrothermal method

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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