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액상합성법에 의한 초고용량 캐패시터용 RuOx 나노입자 합성
Synthesis of RuOx Nanoparticles for Supercapacitor by Liquid Phase Synthesis Method
건양대학교 화학공학과, 논산 320-030 1한국에너지기술연구원 에너지저장연구센터, 대전 305-343
Department of Chemical Engineering, Konyang University, Nonsan 320-030, Korea 1Energy Storage Research Center, Korea Institute of Energy Research, Daejeon 305-343, Korea
HWAHAK KONGHAK, October 2002, 40(5), 607-612(6), NONE
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Abstract
초고용량 캐패시터에 사용되는 RuOx 나노분말을 침전법과 마이크로에멀젼법에 의해 각각 합성하여, 그 분말 특성을 비교하였다. 침전법에 의해 제조된 수화물 분말은 30 nm 이상의 크기를 가지며 응집이 일어난 미세구조를 보였다. 제조된 분말의 비표면적 값은 합성시의 pH에 크게 의존하며, 열처리 온도에 따라 감소하는 경향을 보여 200 ℃에서 열처리시 90 m(2)/g의 비표면적을 보였다. 반면에 마이크로에멀젼법에 의해 제조된 수화물 분말은 15-20 nm의 직경을 보이며 응집되지 않은 미세구조를 보였다. 이 방법에 의해 제조된 분말들의 비표면적은 열처리 온도에 의존하였으며, 200 ℃에서 열처리 시 가장 큰 160 m(2)/g을 보였다.
RuOx nano powders used for supercapacitor were synthesized by precipitation and microemulsion method, respectively and properties of powders were compared. The hydroxide powders prepared by the precipitation method were found to be more than above 30 nm in particle diameter and to have a highly aggregated microstructure. The specific surface area(SSA) of the powders, depended on the pH conditions during precipitation, decreased with increasing calcination temperature and showed 90 m(2)/g at 200 ℃. On the other hand, the hydroxide powders prepared by the microemulsion method were found to be 15-20 nm in particle diameter and to have a non-aggregated microstructure. The SSA depended on calcination temperature_x000D_
and showed 160 m(2)/g at 200 ℃.
Keywords
References
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Hirano S, Bull. Ceram. Soc. Jpn., 22, 1052 (1987)
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Arturo M, Quintela L, Rivas J, J. Colloid Interface Sci., 158, 446 (1993)
Barnickel P, Wokaum A, Sager W, Eicke HF, J. Colloid Interface Sci., 148, 80 (1992)
Burgard D, Kroph C, Nass R, Schmidt H, Mater. Res. Soc. Symp. Proc., 346, 101 (1994)
Hingorani S, Shah DO, Multani MS, J. Mater. Res., 10, 461 (1995)
Pillai V, Shah DO, J. Magn. Magn. Mater., 163, 243 (1996)
Moumen N, Veillent P, Pileni MP, J. Magn. Magn. Mater., 149, 67 (1995)
Gandsden JA, "Infrared Spectra of Minerals and Related Inorganic Compounds," Butterworths, Reading, Mass (1975)
Nakamoto K, "Infrared and Raman Apectra of Inorganic and Coordination Compounds," Wiley, New York, NY (1978)
Zheng JP, Jow TR, J. Electrochem. Soc., 142(1), L6 (1995)
Zheng JP, Cygan PJ, Jow TR, J. Electrochem. Soc., 142(8), 2699 (1995)
