| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pore structure for improving the discharge capacity in high rate discharge and a low rate discharge by specifying the total pore volume of a positive pole plate and the total pore volume of pores having diameters within a specified range. SOLUTION: A pore structure of a positive pole plate is set so that the total pore volume is 0.14-0.18 cm<3> /g, the total pore volume of pores having diameters within a range of 0.01 or more and less than 0.1 is 0.02 cm<3> /g or more, the total pore volume of pores having diameters within the range of 0.1 or more and 4.0 m or less is 0.13 cm<3> /g. In order to provide this pore structure, chemical conversion charge is performed in mannitol or a diluted sulfuric acid containing mannitol and hydrazine sulfide, when a non-chemical conversion treated plate is used. Since the structure is determined in the process of converting the non-chemical conversion plate into lead dioxide when mannitol is added to the electrolyte in chemical conversion, the pore structure of the positive pole plate can be controlled by its addition quantity.</p> |
