Box-implanted Nb2O5 nanorods as superior anode materials in lithium ion batteries

Box-implanted Nb2O5 nanorods as superior anode materials in lithium ion batteries
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盒式植入 Nb2O5 纳米棒作为锂离子电池的优质负极材料

DOI:
10.1016/j.ceramint.2017.06.105
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发表时间:
2017-10
影响因子:
5.2
通讯作者:
Chen Han
Chen Han
中科院分区:
材料科学1区
文献类型:
--
作者:
Shi Chongfu;Xiang Kaixiong;Zhu Yirong;Zhou Wei;Chen Xianhong;Chen Han

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采用水热法合成了一维Nb 2 O 5纳米棒,并将其应用于锂离子电池负极材料。在水热过程中,仅使用表面活性剂P123时,可得到固态的Nb 2 O 5纳米棒,而添加表面活性剂P123和CTAB时,Nb 2 O 5纳米棒中孕育着规则的长方体形状的盒子。盒注入Nb 2 O 5(BI-Nb 2 O 5)纳米棒在40 mA g − 1的电流密度下循环200次后表现出237.6 mA h g− 1的高可逆容量,在5000 mA g−1的电流密度下表现出119.5 mA h g− 1的显著倍率容量。其优异的倍率性能可以归因于规则的盒子植入Nb 2 O 5纳米棒中,这可以为锂离子和电子提供快速传输路径,并缓解充放电过程中的体积变化。
One-dimensional Nb2O5nanorods were synthesized by hydrothermal method and applied for anode materials in lithium ion batteries. Solid Nb2O5nanorods are obtained when surfactant P123 was only utilized in the hydrothermal process, while Nb2O5nanorods were pregnant with regular cuboid-shaped boxes when P123 and CTAB surfactants were incorporated. Box-implanted Nb2O5(BI-Nb2O5) nanorods exhibit a high reversible capacity of 237.6 mA h g−1cycled at the current density of 40 mA g−1after 200 cycles and a remarkable rate capacity of 119.5 mA h g−1at the current density of 5000 mA g−1. Their outstanding rate capability can be attributed to regular boxes implanted in Nb2O5nanorods, which can provide fast transportation path for lithium ions and electronics and relieve the volume change in charge and discharge process.
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