GAS-GENERATING POROUS-ELECTRODES WITH SOLID POLYMER ELECTROLYTE - CALCULATION OF CHARACTERISTICS

The literature on experimental investigations of gas-generating porous electrodes with solid polymer electrolyte (GPE+SPE) contains a great variety of opinions as to the most important parameters, that is, abou t the necessary thickness of the porous layer that would guarantee cur rent densities of about 1 A/cm(2) (different sources indicate the valu es from 0.1 to 500 mu m), the weight of platinum black (in different p apers it varies between 0.1 and 10 mg/cm(2)), and so forth, The presen t paper is concerned with a theoretical evaluation of principal parame ters of GPE+SPE. Theoretical investigation of GPE+SPE has been shown t o call for the solution of a radically new problem, namely, the proble m of double percolation. It is demonstrated that optimization of param eters of GPE+SPE can make it possible to produce electrodes with curre nt densities of 1 A/cm(2) at overvoltages of 20 and 200 mV on the cath ode and the anode, respectively.