TiNb2O7 hollow nanofiber anode with superior electrochemical performance in rechargeable lithium ion batteries
TiNb2O7 hollow nanofiber anode with superior electrochemical performance in rechargeable lithium ion batteries
复制标题
TiNb2O7 中空纳米纤维负极在可充电锂离子电池中具有优异的电化学性能
DOI：
10.1016/j.nanoen.2017.05.057
复制
发表时间：
2017-08
期刊：
影响因子：
17.6
通讯作者：
Jie Shu
中科院分区：
文献类型：
--
作者：
Haoxiang Yu;Hua Lan;Lei Yan;Shangshu Qian;Xing Cheng;Haojie Zhu;Nengbing Long;Miao Shui;Jie Shu
空心微结构在电化学领域一直表现出一些特殊的性能。本研究采用共静电纺丝的方法，合理设计并制备了具有一维中空结构的tinb2o7纳米纤维。电纺丝制备的tinb2o7中空纳米纤维具有插层电位高、电荷-电荷电阻低、电化学动力学快等特点。电化学结果表明，在0.4 C的电流下，tinb2o7中空纳米纤维在150次循环后的可逆容量为210.1 mAh g−1，在10 C的电流下，在900次循环后的可逆容量为158.4 mAh g−1，其容量保持率为80.6%。纳米纤维优异的电化学性能与其独特的中空结构形态有关。此外，还系统分析了tinb2o7中空纳米纤维的锂离子存储机制，该机制与整个充放电循环过程中一个两相共存和两个固溶过程有关。此外，原位和非原位观察也证明了tinb2o7中空纳米纤维具有优异的结构稳定性和电化学可逆性。因此，tinb2o7中空纳米纤维可以作为下一代可充电锂离子电池的替代电极材料。
Hollow microstructure always exhibits some special properties in the field of electrochemistry. Here, this study reports the rational design and preparation of TiNb2O7nanofibers with one dimensional hollow structure via co-electrospinning. The as-electrospun TiNb2O7hollow nanofibers show high intercalation potential, low charge-charge resistance and fast electrochemical kinetics. The electrochemical results exhibit that the TiNb2O7hollow nanofibers deliver a reversible capacity of 210.1 mAh g−1after 150 cycles at a current rate of 0.4 C, and 158.4 mAh g−1after 900 cycles even at a current rate of 10 C with an outstanding capacity retention of 80.6%. The excellent electrochemical performance of nanofibers can be related to the unique morphology of hollow structure. Furthermore, the lithium ions storage mechanism of TiNb2O7hollow nanofibers is also systematically analyzed, which is related to one two-phase coexistence and two solid-solution processes during the whole charge-discharge cycle. In addition, it is also demonstrated by in situ and ex situ observations that TiNb2O7hollow nanofibers have outstanding structural stability and electrochemical reversibility. Therefore, the TiNb2O7hollow nanofibers can be applied as an alternative promising electrode material for the next rechargeable lithium ions batteries.
登录
查看更多内容
影响因子：
6.2
作者：
S. Yin;C. Feng;S. J. Wu;H. L. Liu;B. Ke;Kailai Zhang;Donghua Chen
通讯作者：
S. Yin;C. Feng;S. J. Wu;H. L. Liu;B. Ke;Kailai Zhang;Donghua Chen
钛酸锂负极材料拉曼表征非原位与原位装置的设计与比较
影响因子：
2.8
作者：
Shu, Jie;Shui, Miao;Xu, Dan;Gao, Shan;Yi, Tingfeng;Wang, DongJie;Li, Xing;Ren, Yuanlong
通讯作者：
Ren, Yuanlong
影响因子：
--
作者：
Feng, Xuyong;Shen, Chen;Chen, Chunhua
通讯作者：
Chen, Chunhua
DOI：
10.1107/s0365110x61001996
发表时间：
1961-06
期刊：
Acta Crystallographica
影响因子：
--
作者：
A. D. Wadsley
通讯作者：
A. D. Wadsley
影响因子：
27.8
作者：
Chen, Chaoji;Xu, Henghui;Xie, Jia
通讯作者：
Xie, Jia