期刊
JOURNAL OF POWER SOURCES
卷 189, 期 1, 页码 263-268出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2008.09.045
关键词
Lithium-ion; Positive; GITT; Modeling; Battery
Galvanostatic Intermittent Titration Technique (GITT) experiments were conducted to determine the lithium diffusion coefficient of LiNi0.8Co0.15Al0.05O2, used as the active material in a lithium-ion battery Porous composite positive electrode. An electrochemical model, based on concentrated solution porous electrode theory, was developed to analyze the GITT experimental results and compare to the original GITT analytical theory. The GITT experimental studies on the oxide active material were conducted between 3.5 and 4.5 V vs. lithium, with the maximum lithium diffusion coefficient value being 10(-10) cm(2) s(-1) at 3.85 V. The lithium diffusion coefficient values obtained from this study agree favorably with the values obtained from an earlier electrochemical impedance spectroscopy study. (C) 2008 Elsevier B.V. All rights reserved.
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