Grzegorz LOTA*, Marek BARANIAK, Kacper KOPCZYŃSKI – Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Poznan, Poland; Juliusz PERNAK – Institute of Chemical Technology and Engineering, Poznan University of Technology, Poznan, Poland; Henryk PRZYBYŁO – PPUH Autopart Jacek Bąk sp. z o.o., Mielec, Poland; Włodzimierz MAJCHRZYCKI – Institute of Non-Ferrous Metals Division in Poznan, Poland, Central Laboratory of Batteries and Cells Poznań, Poland
Please cite as: CHEMIK 2016, 70, 9, 549–554
Although lead-acid battery was invented over 150 years ago, it is still one of the most important chemical power sources . The main substrate for electrode material in each lead-acid battery is lead powder, which is a mixture of lead oxide PbO and metallic lead Pb. In order to obtain an electroactive material, appropriate amounts of sulfuric acid, water, and additives are added to lead powder. The choice of additional ingredients (e.g. expanders, polypropylene fibres) depends on whether the prepared material is to be positive or negative. Moreover, the intended use of the battery sometimes requires the addition of different additives to pastes. Examples are start-stop system batteries that require the increase in the active material durability to allow start more often. Such an electroactive material is pasted in a grid, seasoned and electroformed. Obtaining an electrode material of high capacitance is, therefore, closely linked to the physicochemical properties of the lead powder used [1, 2].
Read more in pdf