采用水热法合成了六角形的NH4V3(OH)6(SO4)2前驱体,经退火得到六角形V2O3纳米颗粒,分别对前驱体和退火产物进行表征,并通过SEM表征了不同水热反应时间段前驱体产物的形貌,讨论了六角形纳米结构的形成机理.测试表明,前驱体整体尺寸约600 nm,单枝长度超过200 nm,宽度则小于100 nm,而退火后尺寸减小为约300 nm,单枝长度约100 nm,宽度不超过50 nm.进一步对六角形V2O3纳米颗粒进行锂离子电池充放电性能测试,结果表明,在50 mAh/g的电流密度、1.5～3V终止电压下首次放电比容量为77 mAh/g,20次循环后还有42 mAh/g.
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