The,raw,material,zinc-manganes business, insurance The raw material of zinc-manganese dry battery
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Manganese dioxide is the active material of positiveelectrode, directly participating in the electrochemical reactions, is the mainmaterial to determine the amount of battery charge. According to itspreparation method, can be divided into natural manganese dioxide, chemicalmanganese dioxide and electrolytic manganese dioxide. Wherein theelectrochemical activity of electrolytic manganese dioxide is highest, chemicalmanganese dioxide followed.Graphite is one of the materials of anode. Have crystalform (commonly known as Flake) and aphanitic form (commonly known as theearthy) two kinds. Graphite does not participate in the electrochemicalreaction, have good electrical conductivity, adsorptivity and tendency. Addedinto batteries can increase the battery's electrical conductivity. It adheres aroundthe porous manganese powder absorbs a certain amount of liquid, make thebatteries maintain a certain amount of water, can fully improve the utilizationof manganese powder.Acetylene black, the function is similar tographite in anode. Its specific gravity is very small, the particles are finer,average diameter is 35~45nm, specific surface is 60~70m2/g, electrical conductivity is only second tographite, dispersivity, hydroscopicity are far better than graphite.Zinc, the cathode active material, as a batterys containerand cathode electrical conductor, is the main material to determine the batterysstore performance. There are containing a small amount of cadmium and lead inzinc. Cadmium can enhance the strength of zinc, lead can improve the processingperformance of zinc. Cadmium and lead were able to increase the overpotential ofhydrogen in zinc electrode, reduce the self-discharge of zinc electrode, slowingthe corrosion of zinc and hydrogen released. According to metal powder supplier, if the zinc plate containing Cu, Fe, Ni and so on, will reduce theoverpotential of H2 precipitation on zinc electrode, accelerate batterysself-discharge during storage, so that these harmful impurities must bestrictly controlled.Ammonium chloride is the main component ofzinc-manganese battery electrolyte. Its role is: supplying the H+ which reduceddue to the positive reaction in discharge process; alsoadded with a certain volume of solid ammonium chloride in anode, to supply theammonium chloride which reduced in the discharge process; enhance theconductivity of the electrolyte. Zinc chloride, used in the electrolyte. Mainrole: mitigating zinc corrosion, keeping the water in the electrolyte, damageingstarchs chain-like structure, accelerating the rate of electrolyte paste,reducing the increase of pH values during battery discharge. Flour, cornstarch, the main role is to make the electrolyte paste becomes immobileseparation layer, make it both has good ion conductivity and fixed batteries, convenientto portable use; have protective effect on zinc, can slow the corrosion ofzinc. The sticky of flour is better than starch, with strong adhesiveness, keepmoisture performance is good, uneasy to precipitate. So that while preparingelectrolyte, starch and flour should mix use.Source:http://www.mhcmp.com
The,raw,material,zinc-manganes