The State Key Laboratory of Mechanical Transmissions and the School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, P.R. China.
Nanoscale. 2015 May 21;7(19):8758-65. doi: 10.1039/c5nr01689d.
Herein, we introduce a novel peapod-like architectural array with TiO2 nanoparticles encapsulated in graphitized carbon fibers for the first time. The unique peapod-like TiO2 arrays with high conductivity architectures are designed and fabricated for application in Li-ion batteries. Since the as-synthesized TiO2 peapod array is characterized with the large surface area derived from the mesoporous carbon fiber, as well as the high conductivity further enhanced by a thin carbon coating layer, it has shown superior rate capability, high specific capacitances, and excellent cycling stability, e.g. the specific capacity can reach up to 162 mA h g(-1) over 200 cycles. A rational and universal approach to fabricate a high-performance TiO2 peapod array for constructing next-generation Li-ion batteries is demonstrated in this paper. Furthermore, due to the specificity of the structure and the versatility of TiO2, the nanocomposite can also be applied in photochemical catalysis, electronics, biomedicine, gas sensing and so on.
本文首次介绍了一种新型的豆荚状结构阵列，其中 TiO2 纳米粒子被包裹在石墨化碳纤维中。独特的豆荚状 TiO2 阵列具有高导电性结构，设计用于锂离子电池。由于合成的 TiO2 豆荚阵列具有源自介孔碳纤维的大表面积，以及通过薄碳涂层进一步增强的高导电性，因此它表现出优异的倍率性能、高比容量和出色的循环稳定性，例如，在 200 次循环中，比容量可高达 162 mA h g(-1)。本文展示了一种合理且通用的方法，用于制造高性能 TiO2 豆荚阵列，以构建下一代锂离子电池。此外，由于结构的特异性和 TiO2 的多功能性，该纳米复合材料还可以应用于光化学催化、电子、生物医学、气体传感等领域。
