| 摘要 |
1,148,894. Boron compounds; carbon. ALLMANNA SVENSKA ELEKTRISKA A.B. 20 June, 1966 [21 June, 1965], No. 27360/66. Heading C1A. [Also in Divisions C7 and H1] A porous electrode material for, e.g. fuel cells or accumulators is formed either by sintering in a reducing atmosphere a mixture of a conductive material and at least one of the following boron compounds: (a) a metal borate, (b) a partially hydrolysed metal borate, (c) a metal borate at least partially reduced by hydrogen, (d) a boron oxide or (e) an at least partially hydrolysed boron oxide or by sintering in a reducing atmosphere at least one of the compounds (a) to (c). The conducting material may be at least one of Fe, Ni, Cr, Co, Ti, W, Mo, Ag, C with a particle size of 1 to 100 microns forming 50-99À5% by weight of the electrode and the borate may be at least one of the borates of Fe, Ni, Co, Cr, Mn, Ag, W, Mo; Na, K with a particle size of 0À001 to 50 microns and forming 0À5 to 50% by weight of the electrode. The powder mixture may also include a P.T.F.E. dispersion or up to 25% of ammonium carbonate or bicarbonate and is sintered in hydrogen at 300-1200‹C. The mixture may also be pressed on to a Ni mesh and sintered. The electrode material may be used as grains or plates in fuel cells. The metal borates are produced according to the method disclosed in Specification 1,148,893. |
