Electrochemical In-situ conductivity measurements for thin film of Li{sub 1{minus}x}Mn{sub 2}O{sub 4} spinel
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.
- Research Organization:
- Tohoku Univ., Sendai (JP)
- OSTI ID:
- 20080266
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 5 Vol. 12; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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