상세정보
학술지
Electrochemical Properties of TiO2 Nanotube-Li4Ti5O12 Composite Anodes for Lithium-Ion Batteries
- 발행일
- 201207
- 출처
- Current Applied Physics, v.12 no.4, pp.1199-1206
- ISSN
- 1567-1739
- 출판사
- Elsevier
- 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.
- 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