Electrochromic behavior of a lambda-MnO{sub 2} electrode accompanying Li{sup +}-insertion in an aqueous phase

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1836556· OSTI ID:220871

Kanoh, Hirofumi; Hirotsu, Takahiro; Ooi, Kenta ^[1]

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1. Shikoku National Industrial Research Inst., Takamatsu (Japan)

Electrochemical insertion/extraction reactions of spinel-type manganese oxide with Li{sup +} ions have been extensively studied from the standpoint of the development of alternative materials for secondary batteries. electrochromic properties of thin manganese oxide films have been examined for application to electrochromic materials. Electrochromism of spinel-type manganese oxide accompanying an Li{sup +}-insertion in an aqueous phase was examined by visual light spectrometry. An absorbance spectrum for lithiated manganese oxide gave lower absorbance in the wave-length range < 700 nm than did an Li{sup +}-extracted one. The greatest difference was observed at {approximately} 450 nm and is explained by the difference between the spectra for Mn{sup 3+} and Mn{sup 4+}. A reversible change in absorbance at 450 nm occurred with the Li{sup +}-insertion/extraction reaction. Cyclic voltammetry indicated that the absorbance change couples with the electrochemical response of the manganese oxide to Li{sup +} ions.

• Sponsoring Organization: USDOE
• OSTI ID: 220871
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 3 Vol. 143; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
ELECTRIC BATTERIES
ELECTROCHROMISM
ELECTRODES
IMPREGNATION
LITHIUM COMPOUNDS
MANGANESE OXIDES
VISIBLE SPECTRA
VOLTAMETRY