What are the benefits of including lignins in lead batteries?

To improve the battery lifetime and cold-crank performance.

Lignosulfonates are added in the negative active mass of lead batteries to improve the battery lifetime and cold-crank performance. They are often added with conductive carbons and have the additional role of dispersing the carbons during paste preparation to ensure homogeneity of the active mass and consistent performance. Importantly, the interactions between lignosulfonates and carbons are known to have synergistic effects on the resulting battery performance, requiring consistent preparation and through testing to identify the peak performance.