The O3-Type NaNi1/3Fe1/3Mn1/3O2 (NFM111) a promising, cobalt-free, and low-cost layered transition metal oxide cathode material primarily developed for Sodium-Ion Batteries (SIBs). The charging and discharging is compensated by the redox reactions of the transition metals: Ni2+/Ni3+ and Fe3+/Fe4+ are the primary couples. Mn is typically present as stable Mn4+, although it can participate in redox in some doped or high-voltage scenarios. It exhibits a high initial discharge capacity, often reported around 120–135 mAh/g when cycled in a moderate voltage window (e.g., 2.0-4.0 V), and can reach up to 180 mAh/g at higher cutoff voltages (e.g., 4.3 V).

Part Number	CSIBCNFM111 (C-SIB-C-NFM111)
Chemical Formula	NaNi1/3Fe1/3Mn1/3O2 (O3-type)
Chemical Composition	Na: 20.72 wt%, Ni+Fe+Mn = 50.63 wt% (Ni:Fe:Mn=1:1:1 in mol%)
Particle Size Distribution	D10 = 3.45 um;  D50 =7.64 um;   D90 = 17.03 um
Tap Density	1.34 g/cm3
Specific Area	0.68 m2/g
XRD
First Discharging Capacity	~127 mAh/g (0.1 C, 2.0-4.0 V, Na)
First Columbic Efficiency	92.4%

Notes: (1) Please store the NNFM111O 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. W. Tang, et al. Enhanced stability and electrochemical performance of O3-type NaNi1/3Fe1/3Mn1/3O2 cathode material via yttrium doping for advanced sodium-ion batteries, Ionics, 2024, 30, 7026-7036.
2. N. Hong, et al. Full-Scale Regulation Enabled High-Performance Sodium O3-Type Layered Cathodes, Angew. Chem. Int. Ed., 2025, 64, e202423479.