Investigations on the effect of carbon surface functional groups on electrochemical behavior of lead-carbon electrodes

Agenda for
5-9 September

Jochen Settelein
Fraunhofer Institute for Silicate Research ISC
The influence of surface functional groups of carbon additives on the electrochemical performance of negative electrodes for lead-acid batteries is presented. Within a systematic approach two groups of carbon additives were synthesized to determine the influence of basic and acidic surface groups. Additionally, the effect of specific external surface area is included in order to compare the effect of structural versus chemical properties of carbon.

The presentation will include the characterization of 14 carbon additives, including determination of the amount and type of surface functional groups as well as carbon’s porous texture. Additionally, more advanced analysis methods such as cyclic voltammetry and the adsorption of water and of lignosulfonate will be presented and discussed and relationships between carbon properties drawn. Finally, an outlook regarding the effect of the modified carbon additives on the electrical performance negative lead electrodes (e.g. dynamic charge acceptance) is provided.


Between 2013 and 2018 Jochen Settelein did his PhD at the University of Würzburg in cooperation with the Fraunhofer ISC on the topic “Additives in lead-acid batteries and their influence on the physical and electrochemical properties of the active material”. Between 2016 and 2019 he was group manager for lead-acid battery technology at the Fraunhofer R&D Center Electromobility FZEB. Since 2020 he is responsible for the analytics department at FZEB. Besides advanced battery testing and analytics, his group focusses on fundamental and applied studies about the mechanism and effects of the battery active material