One-pot facile synthesis of iron oxide nanowires as high capacity anode materials for lithium ion batteries
One-pot facile synthesis of iron oxide nanowires as high capacity anode materials for lithium ion batteries
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DOI：
10.1016/j.jallcom.2009.08.043
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发表时间：
2009-11-13
影响因子：
6.2
通讯作者：
Wang, Guoxiu
中科院分区：
文献类型：
--
作者：
Liu, Hao;Wexler, David;Wang, Guoxiu
采用水热法合成了α-Fe 2 O3纳米线。用X射线衍射、扫描电镜和透射电镜对合成材料的晶体结构和形貌进行了表征。结果表明，所制备的α-Fe 2 O3纳米线长径比高达500，形貌均匀。通过循环伏安法（CV）和充放电测试对α-Fe 2 O3纳米线的电化学性能进行了评价。在0.1C倍率下首次充放电容量可达947/1303 mAh/g。在100次循环后，锂储存容量保持在456 mAh/g。这种良好的电化学性能可能归因于纳米线中用于锂离子迁移的大表面积和短路径。(C)2009 Elsevier B. V.保留所有权利。
alpha-Fe2O3 nanowires were synthesized by a facile hydrothermal method. The crystalline structure and morphology of the synthesized materials have been characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results revealed that the prepared alpha-Fe2O3 product was uniform nanowires with the length/diameter ratio as high as 500. The electrochemical properties of alpha-Fe2O3 nanowires were evaluated by cyclic voltammetry (CV) and charge/discharge measurements. The initial charge/discharge capacities can reach 947/1303 mAh/g at the rate of 0.1 C. The lithium storage capacity maintained 456 mAh/g after 100 cycles. This good electrochemical performance may be attributed to the large surface area and short pathways in nanowires for lithium ion migration. (C) 2009 Elsevier B.V. All rights reserved.