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Author

Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Unique Structural Changes of Three-Dimensionally Ordered Macroporous TiO2 Electrode Materials During Electrochemical Cycling

Cited 18 times inthomson ciCited 10 times inthomson ci
Title
Unique Structural Changes of Three-Dimensionally Ordered Macroporous TiO2 Electrode Materials During Electrochemical Cycling
Author
Kim, HyejungKim, Min GyuCho, Jaephil
Keywords
electrodes; intercalation; Jahn– Teller distortion; lithium ion batteries; structural change; TiO2
Issue Date
201212
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED ENERGY MATERIALS, v.2, no.12, pp.1425 - 1432
Abstract
Structural changes during lithium intercalation (to x = 1.1 in LixTiO2) are studied in three-dimensionally ordered macroporous (3DOM)-TiO2 (figure) prepared by colloidal crystal templating. During the charging/discharging cycles, the pristine crystalline domains are pulverized to smaller nanodomains (∼4 nm), but the original 3DOM structure remains robust and maintains its pristine pore-wall thickness. The long-range ordered crystalline orthorhombic phase is partially transformed into the short-range order amorphous phase and Jahn–Teller distortion is also observed.
URI
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DOI
http://dx.doi.org/10.1002/aenm.201200416
ISSN
1614-6832
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