Additives On The Zinc Battery Anode And Electrolyte Performance

In this paper, the parameters of battery and the characteristics of zinc battery are reviewed briefly. The disadvantages of the zinc electrode and the methods used to improve the properties of zinc battery are discussed. The most useful method is to add additives to the electrode or electrolyte. The effections of several kinds of additives have been studied in this paper. This paper includes the following parts: to make the power of Ca[Zn(OH)₃]₂·2H₂O, to research the effections of the additives to electrolyte, and to research the effections of the additives to electrode.Of all additives to electrode, Ca(OH)₂ improves greatly the performance of zinc electrode. But the better property can be getten if the electrode is made of Ca[Zn(OH)₃]₂·2H₂O. To make single-phase Ca[Zn(OH)₃]₂-2H₂O, the phase structure, thermal stability, and solubility of it are researched. Finally, the single-phase Ca[Zn(OH)₃]₂·2H₂O is maden successfully.It is an important way for improving battery performance by adding some matter to alkali electrolyte. The effections of the KOH and senven kinds of important additives to alkali electrolyte are researched by the Uniform Test Design. By analyzing and discussing the solubility of discharged matter, velocity of zinc being eroded, and conductance of the electrolyte, the best electrolyte is gotten by the colligate guideline, including the solubility of discharged matter, velocity of zinc being eroded, and conductance of the electrolyte.In order to improve the performance of zinc electrode, the effections of the additives to electrode have been researched as well as. In this part, four important elements have been researched via orthogonal design experiments. Under this condition, the best electrode is made by the co-principle between the capability of discharging and the attenuation ratio. Meanwhile, the relations between the capability attenuation and phase or the curves of Cyclic Voltammetry are analyzed simply.In order to investigate the function of the additive, the charge-dischargeexperiments of zinc electrode made up of only zinc oxide are done, in 20% KOH solution without any additives. As a result, its discharge capability attenuates very quickly, and the electrode is only cycled twice in its whole lifetime, with every cycle including charging and discharging. However, the best electrode can cycled about 46 times in the best electrolyte without obvious capability attenuation. So the performance of electrode is improved greatly, but we have a long way to go if we want to use widely the second zinc electrode.In order to have a batter understanding to the discharge capability attenuation of electrode, the ratio of Zinc and Calcium in the wost sample and the best sample are analyzed. That Zinc dissolving in the electrolyte is one of the most important reasons to induce capability attenuation is discoverd. For the most important addtive (BiaOs), the single factor experiments are done, meanwhile the phase structure of charged electrode is analyzed. The discharge capability increasing with the increase of the content of Bi2C>3 is getten. The reason is that the reductibility of Ca[Zn(OH)3]2-2H2O is increased with the adding of Bi2C>3.