Product Positioning

A High-Performance Coating Filler Compliant with Food-Grade Safety Standards
 

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1. Product Overview

This product is a high-performance activated clay specifically developed for lithium battery separator coating processes. As a stable supplier for nine consecutive years to leading domestic lithium battery separator manufacturers, our product has undergone long-term industrial verification and deeply matches the stringent demands of processes such as high-speed coating. It is a mature material solution proven by the market.
The production and quality control of this product strictly adhere to GB 25571-2011 “National Food Safety Standard for Food Additive - Activated Clay”. It possesses exceptionally high chemical purity, extremely low impurity content, and excellent batch-to-batch consistency, specifically designed to enhance the comprehensive performance of separators and battery safety.
 

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2. Core Features and Advantages

2.1 High-Purity Safety Assurance

Complies with the National Food Additive Standard, which is more stringent than industrial grades, fundamentally eliminating the risk of introducing heavy metals and other impurities into the battery system. This lays the foundation for the electrochemical stability and long-term cycling safety of the battery.

2.2 Excellent Coating Compatibility

1. High Specific Surface Area (Typical value ≥180 m²/g): Provides strong adsorption and wetting capabilities, significantly improving the absorption rate and retention of electrolyte by the separator.
2. High Fineness and Uniformity (98% passing 75μm sieve): Classified as a micron-grade high-fineness powder, ensuring uniform dispersion in the coating slurry, which is conducive to forming a dense and smooth functional coating.

2.3 Stable Physical & Chemical Properties

Extremely low free acid content, stable pH value, and controlled bulk density result in strong process compatibility and guaranteed batch consistency.

2.4 Proven Reliability

Nine years of experience serving the supply chain of leading customers, with continuously stable product performance.
 

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3. Technical Parameters

Item	Unit	Standard Requirement (GB 25571-2011)	Product Typical Value
Specific Surface Area	m²/g	≥ 130	181
Free Acid (as H₂SO₄)	%	≤ 0.30	0.02
Moisture	%	≤ 12.0	5.1
Fineness (passing 0.075mm sieve)	%	≥ 90	98
Filtration Rate	—	Pass test	Pass
Bulk Density	g/mL	0.55 ± 0.10	0.56
pH Value (50g/L suspension)	—	2.2 ~ 4.8	3.0
Heavy Metals (as Pb)	mg/kg	≤ 40	< 40
Arsenic (As)	mg/kg	≤ 3	< 3

Note: The above typical data are based on our company’s stringent internal quality control system. We ensure consistently stable product performance that meets and exceeds national standard requirements.
 

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4. Application Recommendations

This product is suitable for functional coating slurries applied on various lithium battery separators (such as PE, PP base films, and ceramic-coated films). It primarily contributes to:

1. Enhancing Electrolyte Affinity: High specific surface area improves wetting and electrolyte retention.
2. Improving Mechanical Safety: High-fineness hard particles help increase coating density and puncture resistance.
3. Ensuring a Pure Chemical Environment: Food-grade high purity serves as a safety cornerstone for long battery cycle life.

 

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5. Quality Assurance & Service

Supported by a stringent quality management system, we ensure authentic and traceable data for each batch of products. Leveraging years of experience serving leading customers, we can provide professional technical support and sample adaptation services.
 

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6. Disclaimer

Disclaimer: The information in this Technical Data Sheet is for reference only and does not constitute a guarantee of performance or a specification. The user is responsible for conducting sufficient testing to verify the product’s suitability for their specific application. Product specifications are subject to change without notice.