Addition of various carbon materials into lead-acid battery electrodes was studied and examined in order
to enhance the power density, improve cycle life and stability of both negative and positive electrodes in
lead acid batteries.
High electrical-conductivity, high-aspect ratio, good mechanical properties and chemical stability of
multi-wall carbon nanotubes (MWCNT, unmodified and mofified with carboxylic groups) position them
as viable additives to enhance the electrodes' electrical conductivity, to mitigate the well-known sulfation
failure mechanism and improve the physical integration of the electrodes.
In this study, we investigated the incorporation-effect of carbon nanotubes (CNT) to the positive and
the negative active materials in lead-acid battery prototypes in a configuration of flooded cells, as well as
gelled cells. The cells were tested at 25% and 30% depth-of-discharge (DOD). The positive effect of the
carbon nanotubes (CNT) utilization as additives to both positive and negative electrodes of lead-acid
batteries was clearly demonstrated and is explained herein based on microscopic studies