Single crystal Ni-rich layered cathodes enabling superior performance in all-solid-state batteries with PEO-based solid electrolytes

Single-crystal Ni-rich cathodes in ASSBs with PEO-based electrolytes show higher Li⁺ diffusion coefficients, higher specific capacities, and more stable cycling performances relative to polycrystalline cathodes. This is due to the lack of grain boundaries in the structure.