@phdthesis{Bozkaya2023,
  author    = {Bozkaya, Beg{\"u}m},
  title     = {Influence of Carbon Additives on the Electrochemical Performance of Modern Lead-Acid Batteries},
  doi       = {10.25972/OPUS-31917},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-319174},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2023},
  abstract  = {In the first part of this thesis, a validation of both short-term and long-term DCA tests on 2 V laboratory cells is focussed. The aim is to improve the laboratory cell level measurement technology for dynamic charge acceptance regarding the investigation of carbon additives. To address this issue, it is crucial to apply carbon additives generating a remarkable difference in charge acceptance. For this purpose, five different carbon additives providing a variation in the specific external surface were included as additives in the negative plates of 2 V lead-acid cells. Both short-term (charge acceptance test 2 from SBA and DCA from EN) and long-term (Run-in DCA from Ford) DCA tests were executed on the lead-acid cells. Further understanding of the mechanism was studied by applying electrochemical methods like cyclic voltammetry and electrochemical impedance spectroscopy. The second part of this thesis aims to understand the impact of carbon surface functional groups on the electrochemical activity of the negative electrodes as well as the DCA of 2 V lead-acid cells. In order to address this topic, commercially available activated carbon was modified by different chemical treatments to incorporate specific surface functional groups in the carbon structure. A series of activated carbons having a broad range of pH was prepared, which were used as additives in the negative electrodes. The corresponding lead-acid cells were subjected to cyclic voltammetry and DCA test according to EN. Further, the physical and chemical properties of the functionalized carbon additives were intensively analyzed to establish a structure-property relationship with a focus on DCA.},
  subject      = {Bleiakkumulator},
  language  = {en}
}