Journal
NANO ENERGY
Volume 57, Issue -, Pages 592-599Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2018.12.088
Keywords
Li-ion battery; Anode; Charging induced nucleation; gamma-Li3VO4 nanocrystal
Categories
Funding
- National Natural Science Foundation of China [51402156]
- Shandong Provincial Natural Science Foundation [ZR2014EMQ003, ZR2018QB003]
Ask authors/readers for more resources
It was recently discovered that nanocrystals could be generated in glass anodes by Li-ion insertion, and thereby the cycling stability of Li-ion batteries was enhanced. Here we reveal the origins of both the nanocrystal formation and the enhancement of battery performances by exploring phase transitions, redox reactions, and structural heterogeneity in glass anodes. We infer that Li+ ions interact with the higher energy domains of structural network during discharging/charging, and some of the Li ions are incorporated into the structural network, and thereby the potential energy is lowered through nanocrystal formation. Upon 5000 discharging/charging cycles at a high current density of 1 A g(-1), the nanocrystals in the 40TeO(2)-60V(2)O(5) glass were identified to be gamma-Li3VO4. Owing to the metastable nature of the gamma-Li3VO4 phase, the glass anode becomes electro-chemically active and highly ionic conductive. Simultaneously, the cycling stability is greatly enhanced by the nanostructured glass since the nanocrystals could suppress the propagation of micro-cracks generated by volume changes in glass matrix.
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