Journal
CHEMICAL ENGINEERING JOURNAL
Volume 442, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.136146
Keywords
TiO2(B) nanosheets; Ti vacancies; Li-ion battery; Mg-ion battery
Categories
Funding
- Natural Science Foun-dation of China [51771131]
Ask authors/readers for more resources
Multivalent ion batteries hold promise for future energy storage. This study demonstrates the enhanced electrochemical performance of 2D cation-deficient TiO2(B) nanosheets through the substitution of oxygen with fluorine. The resulting D-TiO2(B) exhibits improved charge transfer, diffusion coefficient, and electrochemical kinetics, leading to high reversible capacity, long-cycling stability, and rate capability in both Mg-ion and Li-ion batteries.
Multivalent ion batteries show a promising future. As one of the crucial defects, cationic vacancies can improve diffusion coefficient and electronic conductivity and provide additional metal ions storage sites. Here, we prepare 2D cation-deficient TiO2(B) nanosheets (D-TiO2(B)) through the substitute of O by F. The D-TiO2(B) exhibits excellent properties of charge transfer and electrochemical kinetics. In the Mg-ion battery, the D-TiO2(B) electrode delivers a high reversible capacity of 129.4 mAh g(-1) at 100 mA g(-1) after 200 cycles. Furthermore, the DTiO2(B) electrode also displays high specific capacity, good long-cycling stability and rate capability in Li-ion battery. The improved electrochemical performance is attributed to the elevated diffusion coefficient, abundant energy storage sites and reduced interface resistance due to cation vacancies and F.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available