Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Anchoring Nickel and Stabilizing Oxygen in Coherent LiNiO2@LiFePO4 Composite Cathode Materials for Rechargeable Lithium?Ion Batteries
The LiNiO2@LiFePO4 composite material with coherent combination exhibits remarkable cyclability, rate capability and high first?cycle Coulombic efficiency. The coherent oriented channels favor the reversible and rapid lithium?ion transport with suppressed strain accumulation while phosphate anions anchored on the LiNiO2 surface stabilizes Ni sites, mitigating surface degradation.LiNiO2 is an appealing cathode material for Li?ion batteries because of high energy density and low cost but suffers from irreversible phase transition and surface instability. Herein, a ball?milled LiNiO2@LiFePO4 composite with oriented coherent combination is reported with enhanced structural stability and Li+ diffusion. The coherent oriented channels are demonstrated to favor the reversible and rapid Li+ intercalation during the H2?H3 phase transition, which significantly alleviates structural strain accumulation. The covalent P?O bonds anchored on the LiNiO2 surface stabilizes the Ni sites, mitigating surface reconstruction and lattice oxygen loss. The LiNiO2@LiFePO4 cathode exhibits a specific capacity of 210 mAh g?1 and an initial Coulombic efficiency of 93.7% at 0.1 C, along with a remarkable rate capability of 156 mAh g?1 at 10 C. Furthermore, the full cells pairing LiNiO2@LiFePO4 cathode and graphite anode deliver a considerable energy density over 280 Wh kg?1 and a remarkable capacity retention. This study offers an effective approach of phosphate coalesce to upgrade high?capacity nickel?rich oxide cathode materials.
» Publication Date: 17/06/2025
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
