Of Ce (iv) / Ce (iii) As The Redox Battery Positive

The electrochemical property of Ce(Ⅳ)/Ce(Ⅲ) as active material for anodic electrode was studied. The viscosity and conductance of the electrolyte, diffusivity and the kinetic parameters of Ce(Ⅳ) in the electrolyte had been studied. Under the [Ce(Ⅳ)]:[Ce(Ⅲ)] ratios of 3:1, 1:1 and 1:3, the viscosity of Ce(Ⅳ) in the experimental electrolyte were 6.34 mPa.s,5.58 mPa.s and 5.37mPa.s respectively. The conductance was 2.598·m-1,3.01S·m-1 and 2.84S·m-1 respectively. The diffusion coefficients of Ce(IV) in the electrolyte was 3.69×10-11 cm2·S-1,5.60×10-12 cm2·s-1 and 2.03×10-12cm2·s-1 respectively. And the exchange current densities of the reaction were determined as 2.31×10-3mA·cm-2,4.18×10-3mA·cm-2,1.09×10-3mA·cm-2 respectively. The results showed that the property was better at the [Ce(Ⅳ)]:[Ce(Ⅲ)] ratios of 1:1, and the redox reaction of the Ce(Ⅳ)/Ce(Ⅲ) was quasi-reversible reaction.The property of Ce(Ⅳ)/Ce(Ⅲ) had been studied using graphite felt electrode, the complex electrode based with graphite felt and the complex used as catalyzer/carbon black, including Co-PTh/C, Mn-H2CO4/C and Co-PPy/C complex electrode. The results showed that the reduction current density of the complex electrode based with graphite felt was higher than graphite felt electrode, and the reduction current density of Co-PTh/C complex electrode was also higher than the complex electrode of Mn-H2CO4/C and Co-PPy/C. And the Co-PTh/C and Mn-H2CO4/C complex electrodes were fit to the battery as anodic materials.The deposition-stripping of zinc usedβ-naphthol polyoxyethylene as an additive in cathodic electrolyte was studied. The results showed that the deposition-stripping of zinc used 0.01g additive in 0.5 mol·L-1 H2SO4 was good.