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Merck
CN

939773

Sodium difluorophosphate

greener alternative

99.5% trace metals basis, ≤200 ppm acid, anhydrous, battery grade

Synonym(s):

NaDFP battery additive, Sodium phosphorodifluoridate

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About This Item

Empirical Formula (Hill Notation):
F2O2P·Na
CAS Number:
15587-24-3
Molecular Weight:
123.96
UNSPSC Code:
12352107
NACRES:
NA.21

Key Documents

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Product Name

Sodium difluorophosphate, 99.5% trace metals basis, ≤200 ppm acid, anhydrous, battery grade

SMILES string

[Na].O=P(F)(F)O

grade

battery grade

assay

99.5% trace metals basis

form

powder

Quality Level

100

greener alternative product characteristics

Design for Energy Efficiency
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sustainability

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impurities

≤200 ppm acid
≤200 ppm free acid
≤250 ppm H2O

solubility

soluble (carbonates: soluble(lit.))
soluble (ethers: soluble(lit.))

anion traces

chloride (Cl-): ≤10 ppm
sulfate (SO42-): ≤10 ppm

cation traces

Ca: ≤10 ppm
Fe: ≤10 ppm
K: ≤10 ppm
Li: ≤10 ppm

application(s)

battery manufacturing

greener alternative category

Enabling

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Application

Sodium difluorophosphate is used in sodium-ion battery research in liquid electrolyte formulations as an additive. It is intended to optimize the performance and stability of sodium-ion batteries. When used as an additive in the liquid electrolyte, it has been shown to improve the efficiency of sodium metal deposition and dissolution, reduce overpotential, and enhance the stability of the solid-electrolyte interphase (SEI) layer on the negative electrode, leading to high coulombic efficiency, excellent rate capability, and long cycle life.

General description

Our battery grade sodium difluorophosphate (NaDPF) is a high-purity, anhydrous compound, synthesized carefully to reduce trace acid, chloride, and sulfate impurities. The crystalline NaDPF is soluble (up to ~1 wt.%) in carbonate blends used in battery electrolytes, like ethylene carbonate and dimethyl carbonate.
Sodium Difluorophosphate is an effective electrolyte additive for sodium-ion batteries that supports green energy storage. It provides electrochemical stability and forms a strong solid electrolyte interphase (SEI), improving battery safety and lifespan. Its easy synthesis and compatibility with battery materials make it key for sustainable and durable sodium-based energy storage. Click here for more information.

pictograms

Corrosion
GHS05

signalword

Danger

hcodes

H314

Hazard Classifications

Eye Irrit. 2 - Skin Corr. 1B

Storage Class

8A - Combustible corrosive hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
MKCW8462

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Sodium difluorophosphate: facile synthesis, structure, and electrochemical behavior as an additive for sodium-ion batteries
Huan Yang
Journal of Material Chemistry A, 9, 3637-3647 (2021)

Articles

Role of Advanced Electrolytes in Sodium Ion Batteries

Discover the role of electrolytes in sodium-ion batteries, to enhance performance, safety, and sustainability in energy storage solutions.

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