Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.matchemphys.2008.03.041
Title: Study on Li+-ion diffusion in nano-crystalline LiMn2O4 thin film cathode grown by pulsed laser deposition using CV, EIS and PITT techniques
Authors: Tang, S.B. 
Lai, M.O. 
Lu, L. 
Keywords: Charge-transfer resistance
Diffusion coefficient
Nano-crystalline LiMn2O4 thin film
Pulsed laser deposition
Issue Date: 15-Sep-2008
Source: Tang, S.B., Lai, M.O., Lu, L. (2008-09-15). Study on Li+-ion diffusion in nano-crystalline LiMn2O4 thin film cathode grown by pulsed laser deposition using CV, EIS and PITT techniques. Materials Chemistry and Physics 111 (1) : 149-153. ScholarBank@NUS Repository. https://doi.org/10.1016/j.matchemphys.2008.03.041
Abstract: In the present work, LiMn2O4 thin films have been prepared by pulsed laser deposition on stainless steel substrates. The films deposited at 400 °C and 200 mTorr of oxygen were mainly composed of nano-crystals less than 100 nm and their agglomerates. Three different electrochemical methods including CV, EIS and PITT were applied to measure the overall Li+-ion diffusion coefficients and charge-transfer resistances at various potentials from 3.85 to 4.5 V. The Li+ diffusion coefficients were in the range of 10-12 to 10-10 cm2 s-1, depending on the potentials. It was found that the charge-transfer resistances decreased with the increase of potentials. Especially, relatively high diffusion coefficients and low charge-transfer resistances were observed above 4.2 V. © 2008 Elsevier B.V. All rights reserved.
Source Title: Materials Chemistry and Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/85694
ISSN: 02540584
DOI: 10.1016/j.matchemphys.2008.03.041
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