Synthesis and electrical properties of stabilized manganese dioxide (α-MnO2) thin-film electrodes

Do Kyun Kwon, Teppei Akiyoshi, Hyeongjae Lee, Michael T. Lanagan

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Manganese dioxide (α-MnO2) thin films have been explored as a cathode material for reliable glass capacitors. Conducting α-MnO 2 thin films were deposited on a borosilicate glass substrate by a chemical solution deposition technique. High carbon activities originated from manganese acetate precursor, (Mn(C2H3O2) 2·4H2O) and acetic acid solvent (C 2H4O2), which substantially reduced MnO 2 phase stability, and resulted in Mn2O3 formation at pyrolysis temperature in air. The α-MnO2 structure was stabilized by Ba2+ insertion into a (2 × 2) oxygen tunnel frame to form a hollandite structure. With 15-20 mol% Ba addition, a conducting α-MnO2 thin film was obtained after annealing at 600-650°C, exhibiting low electrical resistivity (∼1 Ω·cm), which enables application as a cathode material for capacitors. The hollandite α-MnO2 phase was stable at 850°C, and thermally reduced to the insulating bixbyte (Mn2O3) phase after annealing at 900°C. The phase transition temperature of Ba containing α-MnO 2 was substantially higher than the reported transition temperature for pure MnO2 (∼500°C).

Original languageEnglish (US)
Pages (from-to)906-909
Number of pages4
JournalJournal of the American Ceramic Society
Volume91
Issue number3
DOIs
StatePublished - Mar 1 2008

Fingerprint

Manganese
Electric properties
Thin films
Electrodes
Superconducting transition temperature
Cathodes
Capacitors
Annealing
Borosilicate glass
Phase stability
Acetic acid
Acetic Acid
Tunnels
Acetates
Pyrolysis
Carbon
Phase transitions
Oxygen
Glass
Substrates

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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title = "Synthesis and electrical properties of stabilized manganese dioxide (α-MnO2) thin-film electrodes",
abstract = "Manganese dioxide (α-MnO2) thin films have been explored as a cathode material for reliable glass capacitors. Conducting α-MnO 2 thin films were deposited on a borosilicate glass substrate by a chemical solution deposition technique. High carbon activities originated from manganese acetate precursor, (Mn(C2H3O2) 2·4H2O) and acetic acid solvent (C 2H4O2), which substantially reduced MnO 2 phase stability, and resulted in Mn2O3 formation at pyrolysis temperature in air. The α-MnO2 structure was stabilized by Ba2+ insertion into a (2 × 2) oxygen tunnel frame to form a hollandite structure. With 15-20 mol{\%} Ba addition, a conducting α-MnO2 thin film was obtained after annealing at 600-650°C, exhibiting low electrical resistivity (∼1 Ω·cm), which enables application as a cathode material for capacitors. The hollandite α-MnO2 phase was stable at 850°C, and thermally reduced to the insulating bixbyte (Mn2O3) phase after annealing at 900°C. The phase transition temperature of Ba containing α-MnO 2 was substantially higher than the reported transition temperature for pure MnO2 (∼500°C).",
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Synthesis and electrical properties of stabilized manganese dioxide (α-MnO2) thin-film electrodes. / Kwon, Do Kyun; Akiyoshi, Teppei; Lee, Hyeongjae; Lanagan, Michael T.

In: Journal of the American Ceramic Society, Vol. 91, No. 3, 01.03.2008, p. 906-909.

Research output: Contribution to journalArticle

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