Paper describes the in-situ study of Li2MnSiO4 and Li2FeSiO4 cathode materials with X-ray absorption spectroscopy. Local environment and oxidation state of Fe and Mn were simultaneously monitored during the electrochemical oxidation and reduction. In this work with the help of EXAFS analysis we discovered that deformations that occur during the reduction process are completely reversible in the case of Li2FeSiO4 and only partially in the case of Li2MnSiO4.This work confirmed anomalies observed from in-situ characterisation with X-ray diffraction spectroscopy.
COBISS.SI-ID: 1073915
Paper reports the possibilities of using selected ionic liquids as electrolyte solutions for Li-ion batteries and their compability with a Li2FeSiO4. The advantage of the use of ionic liquids in the combination with Li2FeSiO4 is better stability at high temperatures compared to classical electrolytes and materials used in commercial batteries. In this work we demonstrated that some electrolyte salts known that can not be used in the combination with classical electrolytes, have a potential to be used in ionic liquids based electrolytes.
COBISS.SI-ID: 4159770