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학술지 Electrochemical Properties of TiO2 Nanotube-Li4Ti5O12 Composite Anodes for Lithium-Ion Batteries
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저자
김광만, 강근영, 김상효, 이영기
발행일
201207
출처
Current Applied Physics, v.12 no.4, pp.1199-1206
ISSN
1567-1739
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.cap.2012.02.059
협약과제
11SB1300, 통합형 플랙서블 필름 전지 시스템 개발, 김광만
초록
For application as an anode material in lithium batteries, composite anodes consisting of TiO 2 nanotubes (TNT) and Li 4Ti 5O 12 (LTO) nanocrystalline particles are prepared by hydrothermal reaction of rutile TiO 2 particles, physical blending with LTO, and subsequent heat treatment at 300°C. The TNT-LTO composites with varying the composition are characterized by electron microscopy, X-ray diffraction, potentiostatic cyclic voltammetry, and galvanostatic charge-discharge tests at various current rates. With higher LTO content, short TNTs with the average tube diameter of 10 nm are distributed among the potato-shaped LTO particles with the average diameter of 200 nm. At higher content of TNT, however, the LTO particles are sparsely distributed in the fibrillar aggregates of TNT with more lengthened image. As a result, the samples of TNT:LTO = 2:8 and 4:6 show superior cycle performance and high-rate capability, mainly due to their higher electrode densities to yield nanotubular TNT distributed on and supported by potato-shaped LTO nanoparticles. © 2011 Elsevier B.V. All rights reserved.
키워드
Anode properties, Lithium ion battery, Lithium titanate oxide, Titanium oxide nanotube
KSP 제안 키워드
Average diameter, Charge-discharge tests, Composite Anode, Current rate, Cycle performance, Cyclic voltammetry, Electron Microscopy, Galvanostatic charge/discharge, Hydrothermal reaction, Ion batteries, Lithium battery