Chen, Yue and Zhang, Shaohua and Ye, Jiefeng and Zheng, Xinyi and Zhang, Jian-Min and Mangayarkarasi, Nagarathinam and Niu, Yubiao and Lu, Hongyi and Zhao, Guiying and Tao, Jianming and Li, Jiaxin and Lin, Yingbin and Kolosov, Oleg V. and Huang, Zhigao (2024) Nonequilibrium fast-lithiation of Li 4 Ti 5 O 12 thin film anode for LIBs. Communications Physics, 7 (1): 280. ISSN 2399-3650
Full text not available from this repository.Abstract
Li4Ti5O12 (LTO) is known for its zero-strain characteristic in electrochemical applications, making it a suitable material for fast-charging applications. Here, we systematically studied the quasi-equilibrium and non-equilibrium lithium-ion transportation kinetics in LTO thin-film electrodes, across a range of scales from the crystal lattice to the microstructured electrodes. At the crystal lattice scale, during the non-equilibrium lithiation process, lithium ions are dispersedly embedded into the 16c position, resulting in more 8a → 16c migration compared with the quasi-equilibrium lithiation, and forming numerous fast lithium diffusion channels inside the LTO lattice. At the microstructural electrode scale, optical spectrum characterizations supported the “nano-filaments” lithiation model in polycrystalline LTO thin-film electrodes during the lithiation process. Our results reveal the patterns of lithium migration and distribution within the LTO thin film electrode under the non-equilibrium and quasi-equilibrium lithiation process, offering profound insights into the potential optimization strategies for enhancing the performance of fast-charging thin film batteries.