High lithium electroactivity of electrospun CuFe2O4 nanofibers as anode material for lithium-ion batteries
High lithium electroactivity of electrospun CuFe2O4 nanofibers as anode material for lithium-ion batteries
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电纺CuFe2O4纳米纤维作为锂离子电池负极材料的高锂电活性
DOI：
10.1016/j.electacta.2014.08.048
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发表时间：
2014-10-20
影响因子：
6.6
通讯作者：
Wei, Qufu
中科院分区：
文献类型：
--
作者：
Luo, Lei;Cui, Rongrong;Wei, Qufu
在这项研究中，通过静电纺丝和煅烧工艺相结合，成功制备了铁氧体铜（CuFe2O4）纳米纤维。通过X射线衍射研究了晶体结构，结果表明，在800℃获得的产物中只能观察到CuFe2O4的峰，表明形成了纯化合物。 SEM和TEM图像显示，初纺的CuFe2O4纳米纤维具有良好的连续纤维形貌，平均直径约为66 nm。首次讨论了静电纺丝 CuFe2O4 纳米纤维作为锂离子电池负极材料的电化学性能。结果表明，静电纺丝CuFe2O4纳米纤维负极表现出1226.0 mAh g(-1)的高首次放电容量，并在50次循环后保持572.4 mAh g(-1)的稳定容量。同时，电极在较高的放电和充电速率下表现出高容量。电纺CuFe2O4纳米纤维阳极优异的电化学性能归因于其高结晶度以及独特的介孔和纤维结构。 (C) 2014 Elsevier Ltd. 保留所有权利。
In this study, copper ferrite (CuFe2O4) nanofibers were successfully fabricated by a combination of electrospinning and calcination process. The crystal structure was investigated by X-ray diffractomentry, and the results show only peaks of CuFe2O4 could be observed from the product obtained at 800 degrees C, indicating the formation of pure compound. SEM and TEM images showed the as-spun CuFe2O4 nanofibers possessed good continuous fiber morphology with an average diameter of about 66 nm. The electrochemical properties of electrospun CuFe2O4 nanofibers as anode material for lithium-ion batteries were discussed for the first time. The results demonstrated that the electrospun CuFe2O4 nanofibers anode exhibited a high initial discharge capacity of 1226.0 mAh g(-1), and maintained a stable capacity of 572.4 mAh g(-1) after 50 cycles. Meanwhile, the electrodes showed high capacity at higher discharge and charge rate. The excellent electrochemical properties of electrospun CuFe2O4 nanofibers anode were attributed to the high crystallinity, as well as the unique mesoporous and fibrous structures. (C) 2014 Elsevier Ltd. All rights reserved.