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Title: Electrochemical In-situ conductivity measurements for thin film of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} spinel

Abstract

Electrical conductivity of LiMn{sub 2}O{sub 4}, which is a promising cathode active material for lithium ion batteries, was monitored in situ during electrochemical lithium extraction and reinsertion reactions in 1 M LiClO{sub 4} propylene carbonate solution. The in-situ conductivity measurement was achieved by means of an interdigitated microarray electrode coated with a uniform and dense film of LiMn{sub 2}O{sub 4}. The conductivity of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} was found to exhibit a peak-shaped profile as a function of lithium content. The conductivity of Cr{sup 3+}-doped spinel, LiMn{sub 1.95}Cr{sub 0.05}O{sub 4}, decreased monotonically with decreasing lithium content. These results are discussed by considering the effects of phase transformation on the conductivity of these materials.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Tohoku Univ., Sendai (JP)
OSTI Identifier:
20080266
Resource Type:
Journal Article
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 12; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0897-4756
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; THIN FILMS; SPINELS; LITHIUM OXIDES; MANGANESE OXIDES; ELECTRIC CONDUCTIVITY; CATHODES; PHASE TRANSFORMATIONS

Citation Formats

Nishizawa, Matsuhiko, Ise, Tomoaki, Koshika, Hiromichi, Itoh, Takashi, and Uchida, Isamu. Electrochemical In-situ conductivity measurements for thin film of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} spinel. United States: N. p., 2000. Web. doi:10.1021/cm990696z.
Nishizawa, Matsuhiko, Ise, Tomoaki, Koshika, Hiromichi, Itoh, Takashi, & Uchida, Isamu. Electrochemical In-situ conductivity measurements for thin film of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} spinel. United States. doi:10.1021/cm990696z.
Nishizawa, Matsuhiko, Ise, Tomoaki, Koshika, Hiromichi, Itoh, Takashi, and Uchida, Isamu. Mon . "Electrochemical In-situ conductivity measurements for thin film of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} spinel". United States. doi:10.1021/cm990696z.
@article{osti_20080266,
title = {Electrochemical In-situ conductivity measurements for thin film of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} spinel},
author = {Nishizawa, Matsuhiko and Ise, Tomoaki and Koshika, Hiromichi and Itoh, Takashi and Uchida, Isamu},
abstractNote = {Electrical conductivity of LiMn{sub 2}O{sub 4}, which is a promising cathode active material for lithium ion batteries, was monitored in situ during electrochemical lithium extraction and reinsertion reactions in 1 M LiClO{sub 4} propylene carbonate solution. The in-situ conductivity measurement was achieved by means of an interdigitated microarray electrode coated with a uniform and dense film of LiMn{sub 2}O{sub 4}. The conductivity of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} was found to exhibit a peak-shaped profile as a function of lithium content. The conductivity of Cr{sup 3+}-doped spinel, LiMn{sub 1.95}Cr{sub 0.05}O{sub 4}, decreased monotonically with decreasing lithium content. These results are discussed by considering the effects of phase transformation on the conductivity of these materials.},
doi = {10.1021/cm990696z},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = 5,
volume = 12,
place = {United States},
year = {2000},
month = {5}
}