Unique Structural Changes of Three-Dimensionally Ordered Macroporous TiO2 Electrode Materials During Electrochemical Cycling
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- Unique Structural Changes of Three-Dimensionally Ordered Macroporous TiO2 Electrode Materials During Electrochemical Cycling
- Kim, Hyejung; Kim, Min Gyu; Cho, Jaephil
- electrodes; intercalation; Jahn– Teller distortion; lithium ion batteries; structural change; TiO2
- Issue Date
- WILEY-V C H VERLAG GMBH
- ADVANCED ENERGY MATERIALS, v.2, no.12, pp.1425 - 1432
- 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.
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