| 摘要 |
1,215,225. Alkali metal - air fuel cells. NORTH AMERICAN ROCKWELL CORP. 8 March, 1968 [8 March, 1967], No. 11536/68. Heading H1B. A rechargeable fuel cell comprises a first subcell having molten sodium, potassium or sodium/potassium mixture as anode, an amalgam of the alkali metal as cathode and a molten salt or mixture of salts of the alkali metal, fusible below 180‹ C., as electrolyte, and a second subcell using an oxygen-containing gas at the cathode, the amalgam of the first subcell as anode, and an aqueous solution of the hydroxide of the alkali metal as electrolyte. When potassium is used as fuel the fused salt mixture may suitably be (in mol. per cent) 30-50 KNH 2 / 20-35 KOH / 30-50 KI, and aqueous KOH the second electrolyte. With Na/K fuel may be used NaNH 2 /KNH 2 mixture, or the mixed amides, hydroxides and iodides. In Fig. 2 molten Na in anode compartment 21 contacts electrolyte matrix 24 of porous beryllia or alumina, preferably containing the eutectic NaNH 2 / NaOH / Nal (52/38/10) melting at 127‹ C., which contacts a thin porous metal layer 26 containing Na amalgam; aqueous NaOH is circulated past this, through compartment 27; the opposing oxygen electrode 30 is e.g. a platinum-activated nickel screen; current is removed during discharge and supplied during charge via leads 33 and 34, which are attached to the two halves of the cell casing, which are insulated from one another by 0-rings 25; sodium, air and electrolyte are supplied and removed via tubes 22, 31 and 32, and 28 and 29. |
