Unitary plate electrode

Details Unitary plate electrode Unitary plate electrode

H - Electricity

01

M

319/72, 319/75

H01M 4/14 (2006.01) H01M 4/64 (2006.01) H01M 4/68 (2006.01)

Patent

CA 1235737

ABSTRACT UNITARY PLATE ELECTRODE The unitary electrode (10) comprises a porous sheet of fiberglass resin phase (12) the strands (14) of which contain a coating (16) of conductive tin oxide. The lower portion of the sheet contains layer (18) of resin and the upper layer (20) contains lead dioxide forming a positive active electrode on an electrolyte- impervious layer. The strands (14) form a continuous conduction path through both layers (16, 18). Tin oxide is prevented from reduction by coating the sur- face of the plate facing the negative electrode with a conductive, impervious layer resistant to reduction such as a thin film (130) of lead or graphite filled resin adhered to the plate with a layer (31) of conductive adhesive. The plate (10) can be formed by casting a molten resin from kettle (60) onto a sheet of glass wool (56) overlying a sheet of lead foil and then apply- ing positive active paste from hopper (64) into the upper layer (68). The plate can also be formed by passing an assembly of a sheet (80) of resin, a sheet (86) of sintered glass and a sheet (90) of lead be- tween the nip (92) of heated rollers (93, 95) and then filling lead oxide into the pores (116) of the upper layer (118).

465371

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