Lattice Reconstruction Engineering Boosts the Extreme Fast Charging/Discharging Performance of Nickel-Rich Layered Cathodes

The low specific capacity and the poor capacity retention at extreme fast charging/discharging limit the nickel-rich layered cathode commercialization in electric vehicles, and the root causes are interface instability and capacity loss induced by birth defects and irreversible phase transition. In this work, we propose a lattice reconstruction strategy combining polyvinylpyrrolidone-assisted wet chemistry and calcination to prepare the aluminum-modified LiNi0.83Co0.11Mn0.06O2 (ANCM). Our method offers distinct advantages in tailoring birth defects (residual alkali and rocksalt phase), reducing Li vacancies and oxygen vacancies, exhibiting gradient Ni concentration distribution, suppressing the Li/Ni intermixing defects, lowering the lattice strain before and after recycling, and inhibiting the microcracks. The ANCM constructs robust crystal lattices and delivers an initial discharge capacity of 155.3 mAh/g with 89.2% capacity retention after 200 cycles at 5 C. This work highlights the importance of synthesis design and structural modification for cathode materials.