Single-crystal high-nickel layered cathodes for lithium-ion batteries: advantages, mechanism, challenges and approaches

The ever-increasing demand of advanced lithium-ion batteries is calling for high-performance cathode materials. Among promising next-generation cathode materials, high-nickel layered oxides with spherical polycrystalline secondary particles exhibit the outstanding advantage of high energy density. However, polycrystals, suffered from the pulverization of particles and the expansion of cracks, show the shortcoming of poor cycling performance. As...