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Alkali‐Ion Storage Behaviour in Spinel Lithium Titanate Electrodes
Author(s) -
Pan Huilin,
Sun Yang,
Mu Linqin,
Hu YongSheng,
Chen Liquan,
Huang Xuejie
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500209
Subject(s) - lithium titanate , lithium (medication) , materials science , alkali metal , spinel , ion , electrode , lithium ion battery , metallurgy , chemistry , battery (electricity) , thermodynamics , physics , psychology , power (physics) , organic chemistry , psychiatry
The alkali‐ion storage in spinel lithium titanate (Li 4 Ti 5 O 12 ) is comprehensively investigated in this work. In Li 4 Ti 5 O 12 , Na storage is more dependent on the particle size compared to Li storage. Electrochemical results show a Na‐storage capacity from 150 to 16 mAh g −1 , with increasing particle size from 50 to 500 nm, whereas the Li‐storage capacity appears to be independent of particle size. The Na‐storage rate capability in Li 4 Ti 5 O 12 is much worse than that of Li, probably because of the sluggish Na + diffusion in Li 4 Ti 5 O 12 . Ab initio molecular dynamics simulations also indicate that this can be attributed to the slow diffusion kinetics of Na + in spinel Li 4 Ti 5 O 12 .