Korean Journal of Chemical Engineering, Vol.26, No.4, 1016-1021, July, 2009
Preparation of silica-based proton conductors for intermediate temperature fuel cells
E-mail:
The ternary system SiO2-P2O5-ZrO2 electrolyte and phosphotungstic acid (PWA) doped SiO2-P2O5-ZrO2 electrolyte were prepared for intermediate temperature fuel cell by using sol-gel technique. These silica-based proton conductors were confirmed to be non-crystalline structure without phase separation and good thermal stability by XRD and TG/DTA analysis. The doped PWA was found to be stabilized within the silica matrix and to enhance the proton conductivity. The proton conductivities of SiO2-P2O5-ZrO2 and SiO2-P2O5-ZrO2-PWA electrolytes showed 3.3×10^(-5) and 1.8×10^(-3) S/cm at 90 ℃, respectively, and the cell performance of SiO2-P2O5-ZrO2-PWA electrolyte was obtained as 0.02-0.25 mA/cm2 at 300 ℃ under humid condition.
- Alberti G, Casciola M, Solid State Ion., 145(1-4), 3 (2001)
- Nakrumpai B, Pruksathorn K, Piumsomboon P, Korean J. Chem. Eng., 23(4), 570 (2006)
- Norby T, Solid State Ion., 125(1-4), 1 (1999)
- Haile SM, Acta Materialia, 51, 5981 (2003)
- Zhang JL, Xie Z, Zhang JJ, Tanga YH, Song CJ, Navessin T, Shi ZQ, Song DT, Wang HJ, Wilkinson DP, Liu ZS, Holdcroft S, J. Power Sources, 160(2), 872 (2006)
- Seo DH, Kim HR, Shakkthivel P, Shul YG, Journal of the Korea Electrochemical Society, 11, 22 (2008)
- Wainright JS, Litt MH, Savinell RF, Handbook of Fuel Cells, 3, 436 (2003)
- Abe Y, Hayashi M, Iwamoto T, Sumi H, Hench LL, Journal of Non-Crystalline Solid, 351, 2138 (2005)
- Daiko Y, Akai T, Kasuga T, Nogami M, Journal of the Ceramic Society of Japan, 109, 815 (2001)
- Nogami M, Nagao R, Cong W, Abe Y, Journal of Sol-Gel Science and Technology, 13, 933 (1998)
- Aparicio M, Klein LC, Journal of Sol-Gel Science and Technology, 28, 199 (2003)
- Uma T, Nogami M, Mater. Chem. Phys., 98(2-3), 382 (2006)
- Castro Y, Aparicio M, Moreno R, Duran A, Journal of Sol-Gel Science and Technology, 35, 41 (2005)
- Garland NL, Kopasz JP, J. Power Sources, 172(1), 94 (2007)
- Mioc U, Davidovic M, Tjapkin N, Colomban P, Novak A, Solid State Ionics, 46, 103 (1991)
- Staiti P, Freni S, Hocevar S, J. Power Sources, 79(2), 250 (1999)
- Aparicio M, Castro Y, Duran A, Solid State Ion., 176(3-4), 333 (2005)
- Honma I, Takeda Y, Bae JM, Solid State Ion., 120(1-4), 255 (1999)
- Uma T, Nogami M, J. Membr. Sci., 280(1-2), 744 (2006)
- Izumi Y, Ogawa M, Urabe K, Appl. Catal. A: Gen., 132(1), 127 (1995)