Seed-assisted synthesis of highly ordered TiO2@α-Fe2O3 core/shell arrays on carbon textiles for lithium-ion battery applications
Seed-assisted synthesis of highly ordered TiO2@α-Fe2O3 core/shell arrays on carbon textiles for lithium-ion battery applications
复制标题
用于锂离子电池应用的碳纺织品上高度有序的 TiO2@α-Fe2O3 核/壳阵列的种子辅助合成
DOI：
10.1039/c2ee03396h
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发表时间：
2012-04-01
影响因子：
32.5
通讯作者：
Yu, Ting
中科院分区：
文献类型：
--
作者：
Luo, Yongsong;Luo, Jingshan;Yu, Ting
采用分步晶种辅助水热法在碳纤维织物上制备了高度有序的TiO 2 @ a-Fe 2 O3核/壳阵列，并将其作为锂离子电池负极材料进行了研究。该复合TFA阳极具有上级的高倍率性能和优异的循环性能。TFAs的比容量远高于原始碳纺织品（CT）和碳纺织品上的TiO 2纳米棒阵列（TRAs），表明材料和结构杂化对电化学性能的增强具有积极的协同效应。这种复合纳米结构不仅为锂的插入/提取提供了大的界面面积，而且还应该有利于减少电子和离子传输的扩散途径，从而即使在高放电-充电速率下也能提高循环时的容量保持率。值得强调的是，由于CT基底的可拉伸、轻质和可生物降解的特性，CT基底也为LIB作为柔性电子器件呈现出许多潜在的优点。这里提出的制造策略是方便的，具有成本效益的，和可扩展的，这为高性能LIB的最佳复合电极材料的设计开辟了新的途径。
Highly ordered TiO2@alpha-Fe2O3 core/shell arrays on carbon textiles (TFAs) have been fabricated by a stepwise, seed-assisted, hydrothermal approach and further investigated as the anode materials for Li-ion batteries (LIBs). This composite TFA anode exhibits superior high-rate capability and outstanding cycling performance. The specific capacity of the TFAs is much higher than that of pristine carbon textiles (CTs) and TiO2 nanorod arrays on carbon textiles (TRAs), indicating a positive synergistic effect of the material and structural hybridization on the enhancement of the electrochemical properties. This composite nanostructure not only provides large interfacial area for lithium insertion/extraction but should also be beneficial in reducing the diffusion pathways for electronic and ionic transport, leading to the improved capacity retention on cycling even at high discharge-charge rates. It is worth emphasizing that the CT substrates also present many potential virtues for LIBs as flexible electronic devices owing to the stretchable, lightweight and biodegradable properties. The fabrication strategy presented here is facile, cost-effective, and scalable, which opens new avenues for the design of optimal composite electrode materials for high performance LIBs.