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학술지 Lithium-Ion Battery Anode Properties of TiO2 Nanotubes Prepared by the Hydrothermal Synthesis of Mixed (Anatase and Rutile) Particles
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저자
최민규, 이영기, 송승완, 김광만
발행일
201008
출처
Electrochimica Acta, v.55 no.20, pp.5975-5983
ISSN
0013-4686
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.electacta.2010.05.052
협약과제
09SB1200, 통합형 플랙서블 필름 전지 시스템 개발, 김광만
초록
From mixed (anatase and rutile) bulk particles, anatase TiO2 nanotubes are synthesized in this study by an alkaline hydrothermal reaction and a consequent annealing at 300.400°C. The physical and electrochemical properties of the TiO2 nanotube are investigated for use as an anode active material for lithium-ion batteries. Upon the first discharge.charge sweep and simultaneous impedance measurements at local potentials, this study shows that interfacial resistance decreases significantly when passing lithium ions through a solid electrolyte interface layer at the lithium insertion/deinsertion plateaus of 1.75/2.0 V, corresponding to the redox potentials of anatase TiO2 nanotubes. For an anatase TiO2 nanotube containing minor TiO2(B) phase obtained after annealing at 300°C, the high-rate capability can be strongly enhanced by an isotropic dispersion of TiO2 nanotubes to yield a discharge capacity higher than 150mAhg -1, even upon 100 cycles of 10 C-rate discharge.charge operations. This is suitable for use as a high-power anode material for lithium-ion batteries. © 2010 Elsevier Ltd. All rights reserved.
키워드
Anode properties, Hydrothermal synthesis, Li-ion batteries, TiO nanotube 2
KSP 제안 키워드
Anatase and rutile, Anode active material, High power, Hydrothermal reaction, Li-ion, Physical and electrochemical properties, Redox potentials, Solid Electrolyte Interface(SEI), Solid electrolyte interface layer, TiO2 nanotubes, anode materials