Beyond Theoretical Lithiation of the Anode Material Li4Ti5O12
![Beyond Theoretical Lithiation of the Anode Material Li4Ti5O12 Beyond Theoretical Lithiation of the Anode Material Li4Ti5O12](https://neutrons.ornl.gov/sites/default/files/styles/rhpage640/public/3NScD_highlights_Dec-Jan_2020_submitted_pptx_-_Microsoft_PowerPoint_Online-2.jpg?itok=BUN9tNaZ)
Scientific Achievement
It is shown that the accommodation of Li ions on a previously unexpected crystallographic site explains how the anode material LTO (Li4Ti5O12) can be reversibly lithiated from Li4 to Li8, beyond the expected maximum of Li7.
Significance and Impact
The identification of the mechanism for enhanced Li capacity will guide future design and optimization of large-capacity anode materials for intercalation batteries.
Research Details
- Neutron diffraction resolved the structure and the crystallographic site occupancy of Li in LTO for different states of charge, in agreement with calculations and measured voltage profiles.
- Transmission electron microscopy showed the formation of a solid electrolyte interface layer during the initial charge cycle.
“Elucidating the Limit of Li Insertion into the Spinel Li4Ti5O12,”
Haodong Liu, Zhuoying Zhu, Jason Huang, Xin He, Yan Chen, Rui Zhang, Ruoqian Lin, Yejing Li, Sicen Yu, Xing Xing, Qizhang Yan, Xiangguo Li, Matthew J. Frost, Ke An, Jun Feng, Robert Kostecki, Huolin Xin, Shyue Ping Ong, and Ping Liu,
ACS Materials Letters, 1, 96-102 (2019). DOI: https://doi.org/10.1021/acsmaterialslett.9b00099