Open AccessKinetic pathways of ionic transport in fast-charging lithium titanate
Author(s) -
Wei Zhang,
DongHwa Seo,
Tina Chen,
Lijun Wu,
Mehmet Topsakal,
Yimei Zhu,
Deyu Lu,
Gerbrand Ceder,
Feng Wang
Publication year - 2020
Publication title -
science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 12.556
H-Index - 1186
eISSN - 1095-9203
pISSN - 0036-8075
DOI - 10.1126/science.aax3520
Subject(s) - anode , lithium titanate , lithium (medication) , diffusion , ion , metastability , ionic bonding , density functional theory , limiting , materials science , chemical physics , kinetic energy , titanate , inorganic chemistry , analytical chemistry (journal) , chemistry , computational chemistry , thermodynamics , lithium ion battery , electrode , physics , battery (electricity) , endocrinology , engineering , composite material , ceramic , power (physics) , chromatography , quantum mechanics , medicine , mechanical engineering , organic chemistry
Metastable pathways allow high rates In batteries that allow for fast charging and discharging, lithium usually forms a solid solution with the anode so that the only limiting factor is the ionic diffusion. However, for a lithium titanate (Li4 Ti5 O12 ) anode, the lithium ions interact with two phases and the diffusion is slow in both, but it still shows high-rate capabilities. Zhanget al. used electron energy-loss spectroscopy combined with density functional theory calculations to probe the anomalous behavior. They found that a diffuse interface forms between the starting and ending compositions, Li4 Ti5 O12 and Li7 Ti5 O12 , and this is what allows the lithium ions to travel quickly.Science , this issue p.1030
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