Titanium Coating The Anode In The Electrolytic Manganese Dioxide Industrial Research

Some anodes and their manufacture methods are compared each other in the Electrolytic Manganese Dioxide industry in this article. According to the demand of the anodes capability ,the ameliorated methods to anodes are brought forward in it and three kinds of Anode of Ti are prepared, which is Ti/SnO₂,Ti/SnRuCo, Ti/MnO₂/SnRuCo and Ti/TiSnRuMn anodes. The morphology,phase structure, crystal structure and morphology of multivariant oxides were studied by XRD and SEM. Finally, The of different coatings on properties of the multivariant active oxide coated were studied by some electrochemical measurements including cyclic voltammograms. The following results are indicated. 1)For Ti/SnO₂ anode, the result shows : normal thermal decomposition method can prepare the nano-coating., which crystal structure is rutile. And when the preparation temperature of coat is 500 ℃, appending Ru,Co elements in coating can improve the electrochemical capability of Ti/SnO₂ electrode, however, appending La element can not.2)For Ti/SnRuCo anode, the result shows: with the temperature arising, the width of coat crack increases. When the preparation temperature of coat is 600℃, the coat can separate out Ru element. When content of Ru is lower, the structure of coat is Sn-base sosoloid. When content of Ru is lower is higher, the structure of coat is Ru-base sosoloid. Appending Sn in coat can refine the crystal grain. The crack of coat is few when the content of Ru in coat is lower and higher. With the content of Co in coat arising, the crystal grain becomes thinner and thinner. But, the Ru-Sn sosoloid is isolating and maintaining. Appending much Co in coat result that the Co oxide sloughs. At the same time, the Ru oxide also sloughs. The best prepared processing parameter of Ti-base SnRuCo electrode is that the preparation temperature is 500℃ and the mol ratio of Sn,Co and Ru is 61: 4: 35. 3) For Ti/MnO₂/SnRuCo,the use of MnO₂ interface layer can reduce cracks of coating notably,but not shift the roughness of coating. The integral charge of the cyclic volatammety curve of the anode, which uses MnO₂ interface layer,is the maximal. Its ratio of porosity is also the maximal and the inner surface of anode has a bigger contribution to the integral charge. Its complex-plane plots are characterized by two distinct line .In the high frequency region,a short straight line with an angular coefficient close to 45° is observed. The second straight line is observed in the low frequency with angular coefficient close to 90°.By analyzing the EIS, it can be seen...