Solid state electrolyte Li6.4La3Zr1.4Ta0.6O12 as a coating enhances the electrochemical performance of lithium-rich manganese-based cathode materials

The electrochemical performance of the materials were improved by preparing Li6.4La3Zr1.4Ta0.6O12 (LLZTO) coatings on the surface of Li1.2Mn0.54Co0.13Ni0.13O2 (LMRO) particles. Morphological measurements indicate the presence of a coating formed by the aggregation of a large number of LLZTO nanoparticles on the surface of pristine LMRO particles. Electrochemical test results show that the material with LLZTO coating has smaller polarization and lower charge transfer impedance. After 100 cycles at 1C, the capacity retention of the material with (2%wt) LLZTO coating was 89.68%, while the capacity retention of the LMRO original was 80.14%.