Achieving Fast Charging and Superior Cycling Stability Single-Crystal Ni-Rich Cathodes by Ultrafast Aqueous Washing.

ABSTRACT: Single-crystal Ni-rich layered oxides represent ideal cathodes for high-energy-density lithium-ion batteries due to their high compaction density and volumetric capacity. However, lithium-excess high-temperature synthesis generates substantial residual lithium compounds (RLCs; e.g., Li₂CO₃/LiOH) on particle surfaces. These RLCs elevate interfacial impedance, while protracted Li⁺ diffusion pathways in micrometer-sized crystals collectively degrade fast-charge capability and cycling stability. To address these challenges, we develop an efficient strategy employing 3-min ultrafast washing followed by 600°C annealing for LiNi_0.85Co_0.1Mn_0.05O₂ single crystals. This approach achieves 80% capacity retention at 5 C charging meeting

SUBMITTER: Liu K 

PROVIDER: S-EPMC12915119 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature