The Role of Protective Surface Coatings on the Thermal Stability of Delithiated Ni-Rich Layered Oxide Cathode Materials

To achieve a broader public acceptance for electric vehicles based on lithium-ion battery (LIB) technology, long driving ranges, low cost, and high safety are needed. A promising pathway to address these key parameters lies in the further improvement of Ni-rich cathode materials LIB cells. Despite higher achieved capacities thus energy densities, there major drawbacks terms capacity retention thermal stability (of charged cathode) which crucial customer can be mitigated by protecting particles. We studied impact surface modifications cycle life LiNi0.90Co0.05Mn0.05O2 layered oxide cathodes with WO3 simple sol–gel coating process. Several advanced analytical techniques such as low-energy ion scattering, differential scanning calorimetry, high-temperature synchrotron X-ray powder diffraction delithiated materials, well charge/discharge cycling give significant insights into coverage coatings mitigating degradation mechanisms. The results show that successful only 20% prolong an cell play role improving and, hence, LIBs.