Microstructure and Oxygen Reduction Performance of Gas Diffusion Electrode in 4 M KOH Solution

Kwon Pil Park; Il Shik Moon; Jae Gyu Oh

Journal of Industrial and Engineering Chemistry, Vol.5, No.1, 16-21, March, 1999

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Microstructure and Oxygen Reduction Performance of Gas Diffusion Electrode in 4 M KOH Solution

Kwon Pil Park^†, Il Shik Moon , and Jae Gyu Oh¹

Department of Chemical Engineering, Sunchon National University, Chunnam 540-742 Korea
¹Union Carbon Corporation, Chunnam 520-330, Korea

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The microstructure and performance of the oxygen reduction electrodes in 4 M KOH solution usually used for aluminum-air cell are investigated. The microstructure of the electrodes were varied by using different preparative condition (320∼380 ℃ sintering temperature and 18 ∼ 50% PTFE content). Electrolyte uptake and pore size distribution for each electrodes were measured. From these data, microstructure properties of electrodes were calculated. The microstructure and alkali uptake are not affected by the sintering temperature variation. The porosity and alkali absoprtion of electrode decrease as PTFE content increases. The agglomerate porosity and the macropore porosity are not influenced significantly by the preparative conditions. Maximum performance for oxygen reduction was obtained at 22% PTFE content in 4 M KOH solution.

Keywords:oxygen reduction;microstructure;aluminum-air cell;KOH electrolyte

[References]

Watanabe M, Tomikawa M, Motoo S, J. Electroanal. Chem., 195, 81 (1985)
Liu CT, Proceedings of the Symposium on Porous Electrodes: Theory and Practice, Vol. 84-8, p. 191, The Electrochemical Society, Inc., Pennington, NJ (1984)
Watanabe M, Tomikawa M, Motoo S, J. Electroanal. Chem., 195, 81 (1985)
Kenjo T, Kawatsu K, Electrochim. Acta, 30, 229 (1985)
Holze R, Vielstich W, J. Electrochem. Soc., 131, 2298 (1984)
Giordano N, Passalacqua E, Recupero V, Vivaldi M, Taylor EJ, Wilemski G, Electrochim. Acta, 35, 1411 (1990)
Giordano N, Passalacqua E, Staiti P, Mirzaian H, Recupero V, Aldercci V, Di Leonardo R, Vivaldi M, Wilemski G, Taylor EJ, The Electrochemical Society Meeting, Extended Abstract n.71, pp. 108-109, Chicago (1988)
Giordano N, Passalacqua E, Vivaldi M, Taylor EJ, Wilemski G, The 40th Meeting of the Int. Soc. Electrochem., Kyoto, Japan (1989)
Mori T, Imahashi J, Kamo T, Tamura K, Hishinuma Y, J. Electrochem. Soc., 1133, 896 (1986)
Jalan VM, Bushnell CL, U.S. Patent, 4,136,059 (1979)
Vogel W, Lundquist J, Bradford A, Electrochim. Acta, 17, 1735 (1972)
Kunze HR, Gruver GA, J. Electrochem. Soc., 22, 1279 (1975)
Yang SC, Cutlip MB, Stonehart P, Electrochim. Acta, 35, 869 (1990)

[Related Articles]

[1] Watanabe M, Tomikawa M, Motoo S, J. Electroanal. Chem., 195, 81 (1985)

[2] Liu CT, Proceedings of the Symposium on Porous Electrodes: Theory and Practice, Vol. 84-8, p. 191, The Electrochemical Society, Inc., Pennington, NJ (1984)

[3] Watanabe M, Tomikawa M, Motoo S, J. Electroanal. Chem., 195, 81 (1985)

[4] Kenjo T, Kawatsu K, Electrochim. Acta, 30, 229 (1985)

[5] Holze R, Vielstich W, J. Electrochem. Soc., 131, 2298 (1984)

[6] Giordano N, Passalacqua E, Recupero V, Vivaldi M, Taylor EJ, Wilemski G, Electrochim. Acta, 35, 1411 (1990)

[7] Giordano N, Passalacqua E, Staiti P, Mirzaian H, Recupero V, Aldercci V, Di Leonardo R, Vivaldi M, Wilemski G, Taylor EJ, The Electrochemical Society Meeting, Extended Abstract n.71, pp. 108-109, Chicago (1988)

[8] Giordano N, Passalacqua E, Vivaldi M, Taylor EJ, Wilemski G, The 40th Meeting of the Int. Soc. Electrochem., Kyoto, Japan (1989)

[9] Mori T, Imahashi J, Kamo T, Tamura K, Hishinuma Y, J. Electrochem. Soc., 1133, 896 (1986)

[10] Jalan VM, Bushnell CL, U.S. Patent, 4,136,059 (1979)

[11] Vogel W, Lundquist J, Bradford A, Electrochim. Acta, 17, 1735 (1972)

[12] Kunze HR, Gruver GA, J. Electrochem. Soc., 22, 1279 (1975)

[13] Yang SC, Cutlip MB, Stonehart P, Electrochim. Acta, 35, 869 (1990)