전기화학회지 (Journal of the Korean Electrochemical Society)

  • 제12권4호
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  • Pages.342-348
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  • 2009
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  • 1229-1935(pISSN)
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  • 2288-9000(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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아연공기전지용 Pr1-x (Sr, Ca)xCoO3 양극촉매 제조 및 전기화학적 특성

Preparation and Electrochemical Properties of Pr1-x (Sr, Ca)xCoO3 Cathode Materials for Zinc Air Batteries

  • 허상훈 (한국전기연구원 전지압전연구센터) ;
  • 엄승욱 (한국전기연구원 전지압전연구센터) ;
  • 김현수 (한국전기연구원 전지압전연구센터)
  • 발행 : 2009.11.30
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초록

아연공기이차전지는 고에너지밀도형이고 환경친화적이며 낮은 제조단가와 수용액계의 전해질 사용으로 다른 종류의 전지에 비해 매우 안전한 특성을 가진다. 하지만, 고출력 방전에 취약한 단점이 있으며 수용액에서 산소발생 및 환원반응은 매우 높은 과전압 하에서 일어나 전지효율의 감소 및 수명단축의 결과를 가져온다. 따라서 충 방전이 개시되면서 초기 OCV로부터 전압강하를 최소화 시키는 것이 성능 개선의 관건인데 이는 고성능의 촉매개발로 해결해야 한다. 본 연구에서는구연산법을 이용하여 $Pr_{1-x}(Sr,\;Ca)_x\;CoO_3$분말을 합성하고 각 분말들의 물성을 XRD, SEM, TGA 등을 이용하여 측정하고, 이를 이용한 양극의 환원 및 산화분극과 순환전압전류 등의 전기 화학적 특성을 평가하여 기존에 연구했던 $La_{1-x}Sr_xCoO_3$, $La_{1-x}CaxCoO_3$ 등의 촉매 성능보다 향상된 결과를 얻을 수있었다.

Zn/Air secondary batteries are high energy density type and environment-friendly. Also, they have safer properties than batteries of other type by low manufacturing cost and using the electrolyte solution. But, they have a weak concerning large output discharge. Oxygen evolution reaction(OER) and oxgen reduction reaction(ORR) in aqueous solution make a result of a decrease of cell efficiency and life span. Therefore, to minimize the voltage drop from between OCV and charge/discharge voltage is key point. The problem should be solved through developing catalysts of high efficiency. In this study, we synthesized $Pr_{1-x}(Sr,\;Ca)_x\;CoO_3$ powders by citric method and then measured physical characteristics of each powder by XRD, SEM, TGA etc. We examined its electrochemical properties by the cathodic polarization, anodic polarization and cyclic voltammogram. We achieved results that new catalysts showed better performances than existing $La_{1-x}Sr_xCoO_3$, $La_{1-x}Ca_xCoO_3$, ect. catalysts prepared in our lab.

키워드

참고문헌

  1. S. W. Eom and Y. K. Sun. "Synthesis electrochemical evaluation of $La_{1-\chi}Sr_{\chi}CoO_{3}$ cathode material for zinc air secondary batteries application", J. Korean institute of electrical and electronic material engineers, 21, 447 (2008) https://doi.org/10.4313/JKEM.2008.21.5.447
  2. S. W. Eom, S. Y. Ahn, I. J. Kim, Y. K. Sun, and H. S. Kim, "Electrochemical evaluation of $La_{1-\chi}Ca_{\chi}CoO_{3}$ cathode material for zinc air batteries application", Springer Science, J. Electroceram, (2008) https://doi.org/10.4313/JKEM.2008.21.5.447
  3. X. Wang, P. J. Sebastian, M. A. Smit, H. Yang, and S. A. Gamboa, "Studies on the oxygen reduction catalyst for zinc-air battery electrode", J. Power Sources, 124, 278-284 (2003) https://doi.org/10.1016/S0378-7753(03)00737-7
  4. R. Ran, X. Wu, C. Quan, and D. Weng,"Effect of strontium and cerium doping on the structural and catalytic properties of $PrMnO_{3}$ oxides", Solid State Ionics, 176, 965-971 (2005) https://doi.org/10.1016/j.ssi.2004.11.018
  5. T. L. Wen, H. Tu, Z. Xu, and O. Yamamoto,"A study of $(Pr, Nd, Sm)_{1-\chi}Sr_{\chi}MnO_{3}$ cathode materials for solid oxide fuel cell", Solid State Ionics, 121, 25-30 (1999) https://doi.org/10.1016/S0167-2738(98)00378-6
  6. C. Rossignol, T. M. Ralph, J. M. Bae, and J. T. Vaughey, "$Ln_{1-\chi}Se_{\chi}CoO_{3}$(Ln =Gd, Pr) as a cathode for intermediatetemperature solid oxide fuel cells", Solid State Ionics, Sience Direct, 175, 59-61 (2004) https://doi.org/10.1016/j.ssi.2004.09.021
  7. G. C. Kostogloudis, N. Vasilakos, and C. Fitikos, "Crystal structure, thermal and electrical properties of $Pr_{1-\chi}$$Sr_{\chi}$$CoO_{3-\delta}$ (x = 0, 0.15, 0.3, 0.4, 0.5) perovskite oxides", Solid State Ionics, 106, 207-218 (1998) https://doi.org/10.1016/S0167-2738(97)00506-7
  8. S. W. Eom, S. Y. Ahn, C. W. Lee, Y. K. Sun, and M. S. Yun, "Preparation and Electroche mical Evaluation of $La_{1-\chi}$$Sr_{\chi}$$MnO_{3}$ Cathode Material for Zinc Air Secondary Batteries Application", Solid State Phenomena, 124-126, 1055-1058 (2007) https://doi.org/10.4028/www.scientific.net/SSP.124-126.1055
  9. S. W. Eom, S. Y. Ahh, C. W. Lee, Y. K. Sun, and M. S. Yun, "Preparation and electrochemical evaluation of $La_{1-\chi}Sr_{\chi}MnO_{3}$ cathode", Solid State Phenomena, 124-126, 1055 (2007) https://doi.org/10.4028/www.scientific.net/SSP.124-126.1055
  10. H. D. Moon and H. I. Lee. "A study on the catalytic characteristics of oxygen reduction in an alkaline fuel cell", J.of Korean Ind. & Eng. Chemistry, 7, 543-553 (1996)
  11. P. Lessing, "Mixed-Cation Powders via Polymeric Precursors", Am. Ceram. Bull, 68, 1002-1007 (1989)
  12. L. Jorissen, "Bifunctional oxygen/air electr odes", J. power sources, 155, 23 (2006) https://doi.org/10.1016/j.jpowsour.2005.07.038
  13. HANDELMAN, and Joseph, " Zinc/air cell" , PCT WO 01/56098, (2001)