P2-Type Na0.67Ni0.33Mn0.55Ti0.12O2 (NNMTO) Powder for Na-Ion Battery Cathode, 100 g/bottle, CSIBCNNMTO

Sodium Nickel Manganese Titanium Oxide (NNMTO), typically crystallized in the P2-type layered structure, is one of the most promising cathode materials for high-voltage sodium-ion batteries (SIBs). It evolved directly from the classic Na0.67Ni0.33Mn0.67O2 baseline to solve the severe structural degradation that occurs at high operating voltages.

In the pristine Na0.67Ni0.33Mn0.67O2 matrix, charging the battery above 4.0 V (vs. Na/Na+) extracts a large amount of Na+ ions. This triggers a highly destructive P2 to "O2" (or OP4) phase transition, causing the layers to glide, the crystal lattice to abruptly contract, and the cycle life to plummet. Replacing a portion of the Mn^{4+} with Ti^{4+} alters the chemistry in three profound ways: (1) Suppression of Phase Transitions: Ti^{4+} (0.605 Å) has a larger ionic radius than Mn^{4+} (0.53 Å). The strong Ti-O covalent bonds act as "atomic pillars" that lock the transition metal layers in place, completely suppressing or smoothing out the detrimental P2-O2 phase glide at high voltages. (2) Expanded Diffusion Channels: The larger size of the Ti^{4+} ion physically widens the interlayer spacing (d-spacing), facilitating smoother and faster Na+ insertion and extraction. (3) Mitigation of Jahn-Teller Distortion: Titanium helps ensure that manganese remains strictly in its stable Mn^{4+} valence state, avoiding the formation of Mn^{3+}, which induces severe asymmetric lattice distortion and subsequent manganese dissolution into the electrolyte.

Part Number	CSIBCNNMTO (C-SIB-C-NNMTO)
Chemical Formula	Na0.67Ni0.33Mn0.55T0.12O2 (P2 type)
Particle Size Distribution	D10 = 2.06 um;  D50 =4.53 um;   D90 = 9.38 um
Tap Density	1.65 g/cm3
Specific Area	0.81 m2/g
XRD
First Discharging Capacity	~115.2 mAh/g (0.1 C, 2.5-4.25 V, Na)
First Cycle Columbic Efficiency	95.36%
Cycling Stability	Capacity retention after 50 cycles at 1 C is 98.87%
Package Grade	100 g/bottle

Notes: (1) Please store the NNMTO 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. S. An, et al. Titanium Substitution to Advance the Prospect of NaMnO2 Cathodes for Practical Application in Sodium-Ion Batteries, ACS Appl. Energy Mater. 2025, 8, 14, 10508–10518
2. K. Tang, et al. Electrochemical performance and structural stability of air-stable Na0.67Ni0.33Mn0.67-xTixO2 cathode materials for high-performance sodium-ion batteries, Chemical Engineering Journal, 2020, 399, 125725