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Characterization of nano-sized epitaxial Li$$_{4}$$Ti$$_{5}$$O$$_{12}$$(110) film electrode for lithium batteries

Kim, K.-S.*; Tojigamori, Takeshi*; Suzuki, Kota*; Taminato, So*; Tamura, Kazuhisa  ; Mizuki, Junichiro; Hirayama, Masaaki*; Kanno, Ryoji*

Electrochemical properties and structure changes of nano-sized Li$$_{4}$$Ti$$_{5}$$O$$_{12}$$ during lithium (de)intercalation wereinvestigated using a two-dimensional thin film electrode. Li$$_{4}$$Ti$$_{5}$$O$$_{12}$$ thin films were deposited on a Nb:SrTiO$$_{3}$$(110)substrate by a pulsed laser deposition technique. In situ X-ray diffraction measurements clarified the drastic structural changes of the Li$$_{4}$$Ti$$_{5}$$O$$_{12}$$film upon soaking in the electrolyte and during the first intercalation and deintercalation processes. The surfaceregion of Li$$_{4}$$Ti$$_{5}$$O$$_{12}$$ had a different structure from the bulk during electrochemical cycling and could cause the nanosizedLi$$_{4}$$Ti$$_{5}$$O$$_{12}$$ electrodes to have high capacities and poor stabilities.

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Category:Electrochemistry

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