Carboxymethylcellulose Sodium

CAS Number 9004-32-4

Battery Binders, Battery Materials, Sodium-Ion Battery Materials

Carboxymethylcellulose Sodium CAS 9004-32-4

A water soluble battery binder

allowing sustainable process for battery electrodes

Overview | Product Information | Related Products | Technical Support

Carboxymethylcellulose Sodium (CAS number 9004-32-4), commonly known as CMC, is a biodegradable cellulose derivative. Some of the hydroxyl groups in CMC are substituted by sodium carboxymethyl groups, contributing to its water solubility. CMC is a green alternative battery binder, as it does not require organic solvents for processing.

CMC binder introduces a solid permeable interfacial film on the surface of the active cathode material, limiting resistance increase and maintaining the integrity of the electrode. A CMC-sodium vanadium phosphate fluoride electrode exhibits an excellent capacity of 75 mAh/g at high rate of 70 C and long life span of 3500 cycles at 30 C with capacity retention of 79%.

CMC is also used to prepare a sodium thioantimonate (NSS) composite electrolyte. CMC forms a thin encapsulation on the NSS, providing good sodium ion conductance. The encapsulation also acts as a physical barrier to separate NSS from the electrode and moisture, preventing NSS from direct exposure to extreme potentials. Thus, CMC-NSS composite electrolyte promotes the cycling performance of the battery.

A water soluble binder

green and sustainable

Versatile polymer

binder and composite electrolyte

Worldwide shipping

Quick and reliable shipping

High Purity

> 99.5%

General Information

CAS Number	9004-32-4
Chemical Formula	(C₆H₇O₂(OH)_x(OCH₂COONa)_y)_n
Full Name	Carboxymethyl cellulose sodium salt
Molecular Weight	ca. 500,000 Da
Synonyms	CMC, Sodium carboxymethyl cellulose, CMCNa, NaCMC
Classification or Family	Battery binder materials, Battery materials, Anode binders, Composite electrolytes

Chemical Structure

Carboxymethylcellulose Sodium, CAS number 9004-32-4 — Carboxymethylcellulose sodium chemical structure, CAS number 9004-32-4

Product Details

Purity	99.5%
Degree of substitution	0.94
Viscosity (2% aqueous solution)	9416 mPa·s
Appearance	Off-white powder

MSDS Documentation

Carboxymethylcellulose Sodium MSDS Sheet

References

A cellulose encapsulated composite electrolyte design: towards chemically and mechanically enhanced solid-sodium batteries, S. Dong et al., ACS Nano, 18 (25), 16285–16296 (2024); DOI: 10.1021/acsnano.4c03910.
Understanding key NaCMC properties to optimize electrodes and battery performance, N. Keim et al., Adv. Energy Sustainability Res., 6, 2400364 (2025); DOI: 10.1002/aesr.202400364.
Sustainable recovery and reuse of hard carbon from scrap and end-of-life sodium-ion batteries, B. Liu et al., Adv. Energy Mater., 2405894 (2025); DOI: 10.1002/aenm.202405894.

An in-depth study of the solid electrolyte interphase compositional evolution in sodium-ion batteries: unravelling the effects of a Na metal counter electrode on the SEI, J. Fitzpatrick et al., Adv. Sci., e04717 (2025); DOI: 10.1002/advs.202504717.
A parameter-driven approach to modulating chemical composition in Prussian blue analogues cathodes for sodium-ion batteries, S. Ali et al., Chem. Eur. J., e202404726 (2025); DOI: 10.1002/chem.202404726.
Electrochemical characterization of charge storage at anodes for sodium-ion batteries based on corncob waste-derived hard carbon and binder, L. Bottoni et al., ChemElectroChem, 10, e202201117 (2023); DOI: 10.1002/celc.202201117.
Greener, safer and better performing aqueous binder for positive electrode manufacturing of sodium ion batteries, R. Xu et al., ChemSusChem, 17, e202301154 (2024); DOI: 10.1002/cssc.202301154.
Carboxymethyl cellulose-based materials as an alternative source for sustainable electrochemical devices: a review, M. Akhlaq et al., RSC Adv., 13, 5723 (2023); DOI: 10.1039/d2ra08244f.
Biobased acrylic latexes/sodium carboxymethyl cellulose aqueous binders for lithium-ion NMC 811 cathodes, A. Rolandi et al., ACS Appl. Polym. Mater., 6, 1236–1244 (2024); DOI: 10.1021/acsapm.3c02167.
Moving to aqueous binder: a valid approach to achieving high-rate capability and long-term durability for sodium-ion battery, J. Zhao et al., Adv. Sci., 5, 1700768 (2018); DOI: 10.1002/advs.201700768.

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