通过调控硝酸浓度,利用水热酸化钼酸盐溶液高产率地合成了的α-MoO3纳米纤维.并用X射线衍射(XRD)、透射电子显微镜(TEM)和高分辨透射电镜(HRTEM)等技术对其形貌和结构作了表征.结果表明,当硝酸浓度＞6.73mol/L时,可制备出直径范围在50～400nm,沿[001]方向生长的正交相α-MoO3纳米纤维;硝酸浓度在2.6mol/L左右时,产物是针状的六方相MoO3;随着硝酸浓度的提高,产物由六方相MoO3向正交相MoO3过渡.对正交MoO3纳米纤维电极材料的电化学充放电测试表明,电流密度从0.195mA/cm2增至0.52mA/cm2时,首次锂插入容量降幅比通常的微米级粉体材料要小.
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