Solvothermal alcoholysis synthesis of hierarchically porous TiO2-carbon tubular composites as high-performance anodes for lithium-ion batteries. (10th June 2019)

• Record Type: Journal Article
• Authors: Lin, Xiangjun; Wang, Yameng; Chai, Wei; Liu, Ting; Mou, Jirong; Liu, Jiang; Huang, Jianlin; Liu, Meilin
• Is Part Of: Electrochimica acta. Volume 308(2019)
• Page Start: 253
• Page End: 262
• Publication Date: 2019-06-10
• Subjects: Solvothermal alcoholysis -- TiO2-Carbon composites -- Hierarchically porous structure -- 1D tubular frameworks -- Lithium-ion batteries; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.04.052
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Hierarchically porous one-dimensional (1D) TiO2 -carbon tubular composites (TiO2 C-Ts) with interconnected nanoflakes on the porous tube walls, have been successfully created using a simple solvothermal alcoholysis followed by a subsequent calcination process. The as-prepared TiO2 C-Ts demonstrate high electrical conductivity due to the 1D tubular frameworks and the interconnected porous tube walls, offering fast ion/electron transport paths and large space for storing the electrolyte, while buffering the volume change during the Li + insertion/extraction process. When evaluated as an anode in a lithium-ion battery, the optimized TiO2 C-Ts600 electrode displays a remarkable reversible capacity of 534 mA h g −1 after 100 cycles at 180 mA g −1 and an impressive capacity of 284.9 mA h g −1 (∼80% capacity retention) after 3000 cycles at 3.5 A g −1 . Further, the performance of the TiO2 C-Ts600 electrode is also investigated in a full cell using LiFePO4 as the cathode, demonstrating highly reversible discharge capacity (353.8 mA h g −1 after 100 cycles at 100 mA g −1, corresponding to capacity retention of ∼73%) and superior rate capability (254.4 mA h g −1 at 1.0 A g −1 ), suggesting its great potential application in high-performance energy storage devices.