Section of Chemistry

Cathodes (Lithium-ion batteries)

Lithium insertion  materials are common as cathodes in rechargeable Li-ion batteries. Both structure and properties of these materials are crucial to the function of the complete battery. Our research covers a wide range of aspects on cathode materials:

  • The energy available depends on how much lithium can be extracted reversibly. Polyanionic cathodes such as lithium iron silicate (Li2FeSiO4) is a promising cathode material with high capacity and low cost.

  • Charge and discharge properties can be affected by particle size and morphology of the electrode materials. We synthesise and characterise a number of nano-structured cathode materials using different techniques.

  • The lifetime of a battery depends on reactions between the electrodes and the electrolyte. We use Photoelectron Spectroscopy (PES) to study how side-reactions affect the cathode surface and interface.

  • Theoretical calculations, especially DFT calculations, can help rationalise the structure, diffusion mechanisms, and dopant effects. This will also provide some atomic level understanding and functionality.
     

Funding

  • VINNOVA

  • Swedish Research Council (VR)

  • Swedish Energy Agency (STEM)