The Improvement of Utilization and Durability of Positive Active Materials for Lead-Acid Batteries

Reducing greenhouse gas emissions and fossil fuel consumption from the transport sector is a major problem for governments worldwide. For example, the European Commission (EC) has demanded automakers to reduce CO2 emissions by 2030 to 55 % of those in 2021, i.e., to less than 50 g CO2 emissions per 1 km driven.  Furthermore, the EC aims to remove 100 % CO2 emissions by 2035.  These actions require a complete replacement of internal combustion engine vehicles and hybrid vehicles (HEVs) to zero-emission alternatives such as electric vehicles (EVs). Lead–acid batteries in HEVs and EVs are used as auxiliaries unlike conventional SLI and  idle stop-start (ISS) batteries and therefore a reduction in both size and weight is require for improving fuel efficiency. Increasing utilization of the positive active material (PAM) is a key target for cost, size and weight saving. In general, it is well known that PAM subject to a high utilization shows poor durability and thereby  adversely affects the cycle-life of lead–acid batteries. The use of new additives is a promising approach for maximizing the trade-off between utilization and durability of PAM.  This presentation will report the effect of new additives on the characterization, utilization, durability of PAM.


Dr Akihiro Watanabe Research Engineer, The Furukawa Battery Co., Ltd, Japan

Akihiro Watanabe has both a Bachelor of Engineering degree (2011) and a Master of Engineering degree (2013) from Kanagawa University, Japan, as well as a Doctor of Science from Tokyo Institute of Technology (2017)  He joined the Furukawa Battery in 2017 and is now a research engineer in the R&D department.