Compton scattering and density functional theory investigations of cathode materials for Sodium ion batteries
Assa Aravindh Sasikala devi
Research unit of sustainable chemistry (SusChem), University of Oulu
Sodium ion batteries (SIBs) are emerging as the potential alternative for Lithium ion batteries (LIBs) due to their earth abundance and low cost. Nevertheless, the challenges lie in the larger ionic radius of Na, high atomic weight and lower standard potential and various materials such as phosphates, flourophosphates and layered transition metal oxides (LTMOs) are being tested as cathode materials for SIBs. In this work, P2-Na2/3[Fe1/2Mn1/2]O2, produced by significant iron doping is investigated as a potential cathode material focusing on the magnetic properties and electron momentum density. Compton scattering experiments at Spring-8, Japan combined with density functional theory and momentum density calculations are employed for understanding the sodium extraction and insertion, charge compensation and redox reactions in the LTMO material under investigation.
