General and controllable synthesis strategy of metal oxide/TiO2 hierarchical heterostructures with improved lithium-ion battery performance.
General and controllable synthesis strategy of metal oxide/TiO2 hierarchical heterostructures with improved lithium-ion battery performance.
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DOI：
10.1038/srep00701
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发表时间：
2012
影响因子：
4.6
通讯作者：
Zhang X
中科院分区：
文献类型：
--
作者：
Wang H;Ma D;Huang X;Huang Y;Zhang X
我们展示了一种简单、高效、通用的方法来合成由纳米纤维茎和各种金属氧化物(MoS)二次纳米结构(包括Co3O4、Fe2O3、Fe3O4和CuO)组成的新型分级异质结构，该方法将静电纺丝技术和水热生长方法有机地结合在一起，并研究了其可控的形成过程和可能的形成机理。此外，作为对这些分级异质结构功能特性的概念验证，首次研究了Co3O4/TiO2分级异质结构作为锂离子电池负极材料，它不仅具有632.5 mAHg-1的高可逆容量和480次循环95.3%的容量保持率，而且相对于原始的二氧化钛纳米纤维表现出优异的倍率性能。Co3O4和TiO2之间的协同效应以及层次化异质结构的独特特性可能是提高电化学性能的原因。
We demonstrate a simple, efficient, yet versatile strategy for the synthesis of novel hierarchical heterostructures composed of TiO2 nanofiber stem and various metal oxides (MOs) secondary nanostructures, including Co3O4, Fe2O3, Fe3O4, and CuO, by advantageously combining the versatility of the electrospinning technique and hydrothermal growth method, for which the controllable formation process and possible formation mechanism are also investigated. Moreover, as a proof-of-concept demonstration of the functional properties of these hierarchical heterostructures, the Co3O4/TiO2 hierarchical heterostructures are investigated as the lithium-ion batteries (LIBs) anode materials for the first time, which not only delivers a high reversible capacity of 632.5 mAh g-1 and 95.3% capacity retention over 480 cycles, but also shows excellent rate capability with respect to the pristine TiO2 nanofibers. The synergetic effect between Co3O4 and TiO2 as well as the unique feature of hierarchical heterostructures are probably responsible for the enhanced electrochemical performance.
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影响因子：
16.6
作者：
Mai, Li-Qiang;Yang, Fan;Luo, Yan-Zhu
通讯作者：
Luo, Yan-Zhu
影响因子：
32.5
作者：
Han, Hyungkyu;Song, Taeseup;Paik, Ungyu
通讯作者：
Paik, Ungyu
影响因子：
10.8
作者：
Mai, Liqiang;Xu, Lin;Zhao, Yunlong
通讯作者：
Zhao, Yunlong
影响因子：
29.4
作者：
Armstrong, Graham;Armstrong, A. Robert;Scrosati, Bruno
通讯作者：
Scrosati, Bruno
影响因子：
29.4
作者：
Armstrong, AR;Armstrong, G;Bruce, PG
通讯作者：
Bruce, PG