Dry-process Lithium-ion Battery Binder
Qingyane Electronic’s PTFE dry-process binder for lithium-ion batteries uses high-purity PTFE resin as its core raw material. Through proprietary modification processes, its particle morphology and surface properties are precisely optimized. Requiring no solvents, the binder can be directly dry-mixed with active materials and conductive agents, then shear-fibrillated, and finally formed into electrode sheets via dry rolling.
From raw material selection to production and quality testing, the entire process complies with international standards including ASTM D4895 and ISO 12086, as well as strict internal quality control specifications. This guarantees consistent and stable performance in every batch, enabling customers to achieve efficient, eco-friendly, and low-cost production of dry-process electrodes.
The key advantages of this product lie in its solvent-free nature, high fibrillation efficiency, low dosage requirement, and strong bonding strength. It addresses critical pain points of traditional wet-process binders, such as solvent residue, high environmental pressure, and low active material loading in electrodes.
Furthermore, the inherent superior properties of PTFE enhance the cycle stability and service life of electrodes. Compatible with various dry-process manufacturing technologies, it provides essential support for performance upgrades in lithium-ion energy storage devices.
Core Physicochemical Parameters
All product parameters are strictly tailored to the production needs of dry-process lithium-ion battery electrodes. Validated by authoritative testing organizations, the key indicators are presented in the table below, ensuring the product’s adaptability and reliability across diverse production scenarios:
Core Features of PTFE Binder (Dry-Process Exclusive Advantages)
Relying on the inherent advantages of PTFE material and Qingyane Electronic’s modification technology, this product has irreplaceable core competitiveness compared with traditional wet-process binders (such as PVDF) and other dry-process binders, perfectly adapting to the production needs of dry-process electrodes:
1. Solvent-Free and Eco-Friendly, Reducing Production Costs
No organic solvents such as NMP need to be added, enabling direct dry mixing and dry rolling forming. It completely solves the environmental pressure and cost consumption caused by solvent volatilization and recovery in the wet process; at the same time, it avoids the negative impact of solvent residues on battery performance, making the production process greener and more efficient, and greatly reducing the enterprise’s environmental treatment costs and energy consumption.
2. High Fibrillation Performance and Excellent Bonding Strength
Under the action of shear force, PTFE resin can quickly form a continuous fibrous network. The fibers are intertwined and wrapped, firmly wrapping and bonding active materials and conductive agents to form electrode sheets with stable structure. With an addition amount of only 0.5%–1.5%, the electrode peeling strength can reach 6–10 N/m, which is much higher than the industry average, effectively avoiding problems such as powder falling, cracking and delamination of the electrode sheet during subsequent processing, assembly and charge-discharge processes.
3. Excellent Electrochemical Stability and Corrosion Resistance
PTFE material has extremely high chemical inertness, is insoluble in any acids, alkalis, organic solvents and lithium battery electrolytes, does not undergo oxidation or reduction reactions within a wide potential window (0–5V), and will not have side reactions with electrode active materials, ensuring the stability of the battery during long-term cycling; at the same time, it has excellent corrosion resistance, and can be compatible with various electrode systems such as positive electrodes (NCM, LFP) and negative electrodes (graphite, silicon-carbon), with extremely strong compatibility.
4. High Temperature Resistance and Aging Resistance, Improving Battery Life
With a melting point as high as 326–328℃, it can withstand the high temperature during dry rolling (usually 80–120℃). At the same time, during the long-term use of the battery, it can effectively resist high-temperature aging and avoid battery performance degradation caused by binder failure; the PTFE fibrous network structure is stable, not easy to swell or break, which can significantly improve the cycle life of the battery, with a 300-cycle retention rate ≥88% (1C/1C test condition).
5. Strong Process Adaptability, Compatible with Multiple Dry Production Modes
The product can be perfectly compatible with various mainstream dry production processes such as rolling dry process, air flow dry mixing and continuous dry sheet making. It can directly replace the original binder without large-scale modification of existing production equipment, reducing the enterprise’s equipment upgrade cost; at the same time, it is compatible with active materials of different particle sizes and types, meeting the electrode production needs of different scenarios such as power and energy storage.
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