The synthrsis of potassium hexatitanate and manufacturing alkaline fuel cell matrix

Abstract

Summary form only given. The synthesis of potassium hexatitanate has been studied for substitution of asbestos, caused of its severe problem on toxic pollottant. In most of alkaline fuel cell adapted asbestos as the matrial of matrix but it is now prohibited to manufacture because of above reason. For the improvement of alkaline fuel cell performance, developement of matrix with new matrial is required. In this study, the characteristic of synthesized potassium hexatitanate and thin film type matrix for alkaline fuel cell with this material was studied. After ball milled the mixture with 1:4 of K/sub 2/CO/sub 3/ and TiO/sub 2/ Mixture Was sintered at 850/spl deg/C and its product was confirmed with XRD. Adding the PTFE to the obtained potassium hexatitanate according to the various ball-mill time to control its particle size, thin film type matrix was manufactured. The highest wettability of 50/spl deg/ was found powder onlycontaining 10w/o of PTFE and also it had good mechanical properties. But the matrix with K/sub 2/O . 6TiO/sub 2/ whisker had 170/spl deg/% of wettability. To improve its properties, the characteristics of matrix made by whisker and powder mixture were investigated of bubble pressure, pore size distribution and so on. To compared to cell performance according to various mixture ratios of whisker and powder, single cell was assembled Ag oxygen electrode, Raney Ni hydrogen electrode and potassium hexatitanate matrix. Operatibg temperature was at 80/spl deg/C and electrode size was 10 x 10cm/sup 2/.