Detail
Humic acid is a kind of natural macromolecular hydroxyl aromatic carboxylic acid, which is extracted from coal and prepared by proper physico-chemical treatment. Humic acid has a large specific surface area, is weakly acidic and electronegative, contains a large number of hydroxyl, carboxyl, phenol hydroxyl, quinone and hydroxyquinone derivatives, has good adsorption, ion exchange and complexation performance; Due to the existence of active groups, the exchange reaction is formed earlier than the passivation stage of lead during discharge, and the adsorption on the surface of lead to prevent the formation of dense impervious lead sulfate layer, thus significantly improving the low-temperature discharge capacity and battery cycle life.