AEROXIDE® fumed metal oxides in electrodes for lead acid batteries – New pore formation additives

Agenda for
5-9 September

Michael Glagla
Technical Market Manager, Evonik Industries
Lead-acid batteries (LABs), followed by lithium-ion batteries (LIBs), are currently the most important electrochemical storage technology from a societal and economic perspective. To extend the advantages and thus expand competitiveness, LABs, which have been neglected in the past, must meet the increased requirements and therefore continuously improve. Evonik takes up this topic and offers the possibility to improve existing systems by adding customized additives to LAB electrodes.

The focus of this presentation is on structural modifications of the positive and negative active mass (PAM and NAM) to increase overall porosity and to adjust the pore size distribution within the electrodes. Functionalization of the active masses with fumed metal oxides results in improved electrode plates with an increased porosity. The associated improvements in the electrolyte accessibility have a direct influence on the active mass utilization and thus on the forming efficiency and final battery capacity. In addition to creating a more advantageous pore size distribution, the use of fumed metal oxides as a coating on electrode materials such as leady oxide and red lead results in pastes with stable high density but lower viscosity and longer storage stability. Such paste characteristics are beneficial when it comes to maximum throughput in both continuous and batch production lines. This improved processability would therefore also be reflected in time and cost savings and thus also in a more sustainable production method. Evonik is continuously looking for new collaboration partners to support the development of next-generation lead-acid batteries.


Michael Glagla joined Evonik in 2009 and earned his BSc in Chemical Engineering in 2017 and his MSc in Chemical Engineering in 2020 from the Provadis University in Frankfurt am Main, Germany, while studying part-time. His tasks as “Technical Market Manager” in the application technology for batteries include the improvement of the lead-acid battery by additivation with special oxides in cooperation with institutes and the lead battery industry. Responsibilities are also technical customer support and the planning and implementation of laboratory tests and methods.