Flexible, three-dimensional ordered macroporous TiO2 electrode with enhanced electrode–electrolyte interaction in high-power Li-ion batteries. (June 2016)

• Record Type: Journal Article
• Authors: Lui, Gregory; Li, Ge; Wang, Xiaolei; Jiang, Gaopeng; Lin, Edric; Fowler, Michael; Yu, Aiping; Chen, Zhongwei
• Is Part Of: Nano energy. Volume 24(2016:Jun.)
• Page Start: 72
• Page End: 77
• Publication Date: 2016-06
• Subjects: Three-dimensional ordered macroporous -- Li-ion batteries -- TiO2 -- Flexible -- High-power; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2016.03.019
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: A simple methodology is developed for the in-situ preparation of flexible, three-dimensional ordered macroporous (3DOM) TiO2 electrodes with greatly enhanced mass transfer. The 3DOM electrode is fabricated using a polystyrene colloidal crystal templated carbon cloth, and provides significant improvements over conventional nanoparticle electrodes without the use of binder or other additive. When evaluated as an anode in a Li-ion battery, the 3DOM electrode provides outstanding high rate performance. The electrode provides a specific capacity of 174 mA h g −1 at a current density of 2 A g −1, which is 2.6 times greater than that achieved with a nanoparticle electrode (68 mA h g −1 ). The 3DOM electrode also achieves excellent cycling stability, with a capacity retention of 94.8% (181 mA h g −1 ) over 1000 cycles at 10 C (1.7 A g −1 ) compared to 93.7% (67 mA h g −1 ) for the nanoparticle electrode. To the best of our knowledge, the performance of our 3DOM electrode is among the highest of binder-free, flexible TiO2 electrodes. We believe that this methodology is highly useful and is easily transferable to other materials and applications Graphical abstract: Highlights: A high power anode is fabricated using three-dimensional ordered macroporous TiO2 . The porous structure improves mass transport and electrode–electrolyte interaction. The anode shows excellent rate and cycling capabilities over particle electrodes.