Anchoring Nickel and Stabilizing Oxygen in Coherent LiNiO2LiFePO4 Composite Cathode Materials for Rechargeable Lithium-Ion Batteries
© 2025 Wiley‐VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 35 vom: 16. Sept., Seite e2509213 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
|
| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article coherent coating composite cathode lithium iron phosphate nickel‐rich oxide oriented diffusion channel |
| Zusammenfassung: | © 2025 Wiley‐VCH GmbH. 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 LiNiO2LiFePO4 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 |
|---|---|
| Beschreibung: | Date Revised 05.09.2025 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202509213 |