Alkaline battery positive electrode preparation method
An alkaline battery and positive electrode technology is applied in the field of the preparation of the positive electrode of the alkaline battery, which can solve the problems of low current discharge performance of the battery and the reduction of positive active materials, and achieves the advantages of reducing the polarization of the positive electrode, increasing the porosity, and improving the utilization rate. Effect
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Embodiment 1
[0018] 1) Suspend barium sulfate particles with an average particle size of 2 μm in MnSO 4 solution, and the concentration of suspended barium sulfate particles in the bath is controlled at about 0.7g / L, and the modified electrolytic manganese dioxide containing barium sulfate with an average particle size of 25 μm is obtained by the suspension electrolysis process. The content of barium sulfate in the modified electrolytic manganese dioxide is listed in Table 1. During the electrolysis process, the electrolyte and barium sulfate should be continuously replenished so that the content of barium sulfate in the solution is at a relatively stable value.
[0019] 2) Take 1500g of unmodified electrolytic manganese dioxide, graphite 140g, and calcium stearate 60g that do not contain barium sulfate and mix them uniformly through dry mixing, then add 640g of 40% KOH aqueous solution and mix them evenly with wet mixing; Sieve to obtain granular powder.
[0020] 3) Stir the granular po...
Embodiment 2
[0024] 1) Suspend barium sulfate particles with an average particle size of 3 μm in MnSO 4 solution, and the concentration of suspended barium sulfate particles in the bath is controlled at about 1.2g / L, and the modified electrolytic manganese dioxide containing barium sulfate with an average particle size of 35 μm is obtained by the suspension electrolysis process. The content of barium sulfate in the modified electrolytic manganese dioxide is listed in Table 1. During the electrolysis process, the electrolyte and barium sulfate should be continuously replenished so that the content of barium sulfate in the solution is at a relatively stable value.
[0025] 2) Stir the granular powder obtained in Step 2 of Example 1, while stirring, add 4% by weight of the modified electrolytic manganese dioxide prepared in Step 1, stir evenly, and make it into a battery positive electrode.
[0026] 3) The remaining steps are the same as Steps 4-5 of Example 1.
Embodiment 3
[0028] 1) Suspend barium sulfate particles with an average particle size of 4 μm in MnSO 4 solution, and the concentration of the suspended barium sulfate particles in the bath is controlled at about 2.0g / L, and the modified electrolytic manganese dioxide containing barium sulfate with an average particle size of 40 μm is obtained by the suspension electrolysis process. The content of barium sulfate in the modified electrolytic manganese dioxide is listed in Table 1. During the electrolysis process, the electrolyte and barium sulfate should be continuously replenished so that the content of barium sulfate in the solution is at a relatively stable value.
[0029] 2) Stir the granular powder obtained in Step 2 of Example 1, while stirring, add 5% by weight of the modified electrolytic manganese dioxide prepared in Step 1, stir evenly, and make it into a battery positive electrode.
[0030] 3) The remaining steps are the same as Steps 4-5 of Example 1.
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