P2/O3 hybrid-phase layered oxides represent one of the most effective structural engineering strategies for high-performance sodium-ion battery (SIB) cathodes. By deliberately inducing a coherent intergrowth of both P2 and O3 phases within a single particle, this hybrid framework combines the best attributes of both structures while mutually suppressing their individual thermodynamic drawbacks

In a true hybrid material, the P2 and O3 phases are not simply mechanically blended; they are atomically intergrown along the c-axis within the same crystalline grain. This unique interface configuration yields two main structural advantages: (1) "Phase Pinning" Effect: During high-voltage charging (>4.1 V vs. Na+/Na), pristine P2 domains normally slide into the destructive O2 phase (causing a large ~23% volume drop), while O3 domains undergo highly irreversible structural distortions. In a hybrid lattice, the phase boundaries create localized structural strain fields. The rigid P2 domains mechanically anchor the O3 sheets, and vice versa. This mutual stabilization suppresses the collective layer sliding, locking the material into a smooth, highly reversible solid-solution reaction pathway across a wide voltage window.

Notes: (1) Please store the Na1.14Ni1/3Fe1/3Mn2/3O2 powder in a dry area (glovebox is preferred); (2) The battery powder is highly recommended to be dried at 80-100°C in a vacuum oven for 6-12 h before use.

References: 

1. X. Qi, et al. Design and Comparative Study of O3/P2 Hybrid Structures for Room Temperature Sodium-Ion Batteries, ACS Appl. Mater. Interfaces 2017, 9, 46, 40215–40223.
2. D. Hao, et al. Design of high-entropy P2/O3 hybrid layered oxide cathode material for high-capacity and high-rate sodium-ion batteries, Nano Energy, 2024, 125, 109562