NaTiPO4 (NTP) Powder for Aqueous Na-Ion Battery Anode, 20 g/bottle, CASIBANTP

NaTi2(PO4)3 (NTP)—often written broadly as NaTiPO4 when discussing its generic polyanionic titanium phosphate framework—is one of the premier anode (negative electrode) materials for sodium-ion batteries, particularly celebrated for its exceptional performance in aqueous sodium-ion batteries (ASIBs).

NaTi2(PO4)3 crystallizes into a rhombohedral structure (space group R3c). (1) Structural Cage: The skeleton of the material is built from corner-sharing [TiO6] octahedra and [PO4] tetrahedra. Each [TiO6] unit is linked to six [PO4] units, creating an open, robust 3D interconnected network. (2) Large Diffusion Tunnels: This open framing hosts large interstitial cavities (specifically the Na(1) and {Na(2) sites) that act as wide highways for Na+ ions. The activation energy for sodium migration through these tunnels is exceptionally low, enabling rapid ion intercalation and deintercalation. (3) Zero-Strain Intercalation: Because the covalent polyanionic framework is remarkably rigid, the total volume change during complete sodiation/desodiation is < 1%. This "zero-strain" nature prevents structural collapse, particle pulverization, and mechanical peeling over thousands of cycles.

In an aqueous (water-based) electrolyte, the thermodynamic stability window of water is narrow (1.23 V, though practically extended to ~1.5 V - 2.0 V due to overpotentials). If an anode's operating voltage is too low (like graphite or metallic sodium at ~0 V), it will trigger severe hydrogen evolution reactions (HER), decomposing the water, building up gas pressure, and destroying the cell. At ~ 0.4 V vs. Standard Hydrogen Electrode (SHE) (which equates to its position in aqueous testing), NTP sits perfectly within the stable electrochemical window of water, effectively suppressing hydrogen gas generation while maximizing the overall cell voltage.

Part Number	CASIBANTP (C-ASIB-A-NTP)
Chemical Formula	NaTiPO4
Chemical Composition	Na: 5.5 wt%  Ti: 22.6 wt%   PO4: 69.0 wt%
Particle Size Distribution	D10: 1.6 um,  D50 =4.8 um,  D90: 9.1 um
Tap Density	1.50 g/cm3
Specific Area	0.48 m2/g
pH	10.5
XRD
First Discharging Capacity	~110 mAh/g (0.1 C)
Package Grade	20 g/bottle

Notes: (1) Please store the NTP 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. Y. Louis, et al. Accurate Prediction of Voltage of Battery Electrode Materials Using Attention-Based Graph Neural Networks, ACS Appl. Mater. Interfaces 2022, 14, 23, 26587–26594
2. C. Xu, et al. A novel KTP-type NaTiPO4F electrode material for high-performance Na-ion batteries, A novel KTP-type NaTiPO4F electrode material for high-performance Na-ion batteries, 2025, 76, 104156