Investigation of the reaction distribution in LiCoO2 compostie cathodes for Li-ion batteries

Dehlia Eide Brennhaugen

        The rechargeable Li-ion battery has become a key component in today’s portable electronics, and is finding new areas of use in environmentally friendly, high performance electric vehicles. Ionic movement and distribution through the cathode material is an important issue to understand and control if a high charging rate is to be achieved. When the charging rate increases, the capacity is observed to decrease because of the formation of a reaction distribution in the composite electrode. To investigate how this reaction distribution forms, a laminated electrode has been developed to investigate the reaction distribution in two dimensions. Investigations into the effects of temperature and electrolyte have been conducted.