Spray Pyrolysis에 의한 Manganese Oxide 입자의 제조 및 전기화학적 특성

최원창; 변동진; 이중기; 박달근; 김현중; Won-Chang Choe; Dong-Jin Byun; Jung-Kee Lee; Dal-Keun Park; Hyeon-Joong Kim

Korean Journal of Materials Research, Vol.11, No.11, 936-940, November, 2001

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Spray Pyrolysis에 의한 Manganese Oxide 입자의 제조 및 전기화학적 특성

Preparation of Manganese Oxide Powders by Spray Pyrolysis and its Electrochemical Characterization

최원창, 변동진 ^†, 이중기 ¹, 박달근¹, 김현중¹

고려대학교 공과대학 재료공학과
¹한국과학기술연구원 나노환경 연구센타

Won-Chang Choe, Dong-Jin Byun^†, Jung-Kee Lee¹, Dal-Keun Park¹, and Hyeon-Joong Kim¹

Dept. of Material Science, Korea University, Seoul, 136-701, Korea
¹Eco-Nano Research Center, KIST, Seoul 130-650, Korea

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Spray pyrolysis is a favorable technique to form complex mixed-metal oxide powders with high purity in high temperature region. Manganese oxide powders were prepared by spray pyrolysis from an aqueous solution of Mn(NO 3 ) 2 . Powders were formed in the temperature range of 500~ 700 ? C under the constant pressure of 300torr. All the powders have hydrous forms. When the temperature was increased, the size and the surface area of the particles decreased. An electrochemical capacitors were made with manganese oxide electrodes and KOH electrolyte. With the temperature decreased, capacitors showed high capacitance. Capacitor which was prepared with powders formed in the temperature 500 ? C demonstrated specific capacitances as high as 83F/g.

Keywords:spray pyrolysis;hydrous manganese oxide

[References]

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Kwon SJ, Characterization of Metal Doped Tin Oxide Particles Prepared by spray Pyrolysis, Dept. Chem. Eng., KAIST (1997) (1997)
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[Related Articles]

[1] Handbook of Nanostructured Materials and Nanotechnology 1st ed., pp. 557, Nalwa HS, Academic Press, U.S.A, (2000) (2000)

[2] Kwon SJ, Characterization of Metal Doped Tin Oxide Particles Prepared by spray Pyrolysis, Dept. Chem. Eng., KAIST (1997) (1997)

[3] Kanno Y, Suzuki T, J. Mater. Sci., 23, 3067 (1988)

[4] Kodas TT, Adv. Mater., 180 (1989)

[5] Messing GL, Zhang SC, Jayanthi GV, J. Am. Ceram. Soc., 76, 2707 (1993)

[6] Anderson H, Kodas TT, Smith DM, Ceram. Bull., 68, 996 (1989)

[7] Jayanthi GV, Zhang SC, Messing GL, Aerosol. Sci. Technol., 19, 478 (1993)

[8] Milosevic O, Jordovic B, Uskokovic D, Mater. Lett., 19, 165 (1994)

[9] Milosevic O, Uskokovic D, Mater. Sci. Eng. A, 168, 249 (1993)

[10] Zhang SC, Messing GL, J. Am. Ceram. Soc., 73(1), 61 (1990)

[11] Fernandez JL, Dechialvo MR, Chialvo AC, J. Appl. Electrochem., 27(12), 1323 (1997)

[12] Zhang SC, Messing GL, in 'Ceramic transactions', vol. 12, 'Ceramic Powder Science III'. Messing GL, Hirano S, Hausner H, American Ceramic Society, Westerville, OH, (1990) (1990)

[13] Lenggoro IW, Okuyama K, de la Mora JF, Tohge N, J. Aerosol Sci., 31(1), 121 (2000)

[14] Erday L, transl. by Svehla G, Gravimetric Analysis, Part 1, Macmillan, New York, 298 (1983) (1983)