HPC in Battery Manufacturing,HPC is a high-purity non-ionic cellulose ether featuring sodium-ion-free property, dual solubility in water and alcohol, shear thinning, thermal gelation at elevated temperatures, and residue-free removal via low-temperature water washing. It is applicable to four major application scenarios: lithium-ion batteries, aqueous zinc-ion batteries, solid-state batteries and separator ceramic coatings, serving as a dedicated protective colloid as well as dispersing and thickening agent for high-end batteries
Slurry Preparation for Lithium-ion Battery Anodes (Most Widely Used Commercial Scenario)
1. Protective Colloid for Powder Dispersion
The hydroxyl groups on molecular chains adsorb graphite, nano-silica particles and carbon nanotubes, separating powders via steric hindrance to avoid agglomeration of nano conductive agents. The slurry remains homogeneous without stratification or precipitation during standing, enabling high-speed slot die coating free of pinholes and particle protrusion defects.
2. Rheology Regulation for High-Speed Coating Compatibility
It exhibits shear-thinning behavior: viscosity decreases under stirring or blade coating for smooth pumping, while viscosity rapidly recovers when static to prevent edge sagging and uneven thickness of electrode sheets.
3. Compatibility with High-Swelling Silicon-Carbon Anodes
A flexible thin film forms after drying to buffer volume expansion of silicon materials during charge and discharge, reducing electrode cracking and active material shedding, and significantly extending long-cycle service life.
4. High Purity with Low Ionic Contamination (Core Advantage over CMC)
CMC is an anionic sodium salt that introduces sodium ion impurities, which tend to trigger side reactions in high-energy and power batteries.
Electronic-grade non-ionic HPC contains extremely low levels of metal ions, suitable for high-end consumer electronics lithium batteries and automotive power lithium batteries.
5. Temporary Protective Film for Process Protection
After coating and drying, HPC forms a protective film on electrode surfaces to prevent abrasion and shedding of active materials during calendering, slitting and transportation. The film can be completely removed with pure water or alcohol without carbon residues.
Additive for Ceramic Coatings on Lithium-ion Battery Separators
1. Acts as a dispersant for alumina/boehmite ceramic powders to stabilize ceramic suspensions and form uniform, compact coatings.
2. Improves electrolyte wettability of separators, reduces interfacial impedance and enhances fast-charging performance.
3. Modifies PE/PP separators to boost heat resistance, lower thermal shrinkage rate and improve thermal safety of batteries.
Additive for Aqueous Cathode Slurries (Ternary / Lithium Iron Phosphate Cathodes)
1. Uniformly disperse lithium iron phosphate and nano conductive carbon, delivering excellent storage stability of slurry.
2. High electrochemical inertia leads to fewer interfacial side reactions in high-voltage cathode systems and lower battery capacity decay.
3. Suitable for 3D-printing cathode ink; the molded structure features no collapse or broken lines with uniform and regular electrode thickness.
Substrate for Gel Solid-State Electrolytes (Cutting-Edge Energy Storage Field)
1. HPC can be compounded with lithium salts to prepare flexible gel electrolytes, which combine the high ionic conductivity of liquid electrolytes and the leakage-free safety merits of solid-state batteries.
2. The three-dimensional polymer network restrains electrolyte volatilization, reduces solvent evaporation and suppresses side reactions at electrode interfaces.
3. It can be coated into ultra-thin electrolyte films, applicable to miniature pouch batteries and household energy storage batteries.
Aqueous Zinc-Ion Batteries (New Type of Safe Energy Storage)
HPC blended with zinc salts is adopted to fabricate artificial protective layers for zinc anodes, representing a cutting-edge industrial solution
