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Boehmite products
- Description
- Specifications
- Physical Properties
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Product Introduction
In the lithium‑ion battery industry, boehmite is primarily used for coating lithium‑battery separator membranes, edge coating of electrode sheets, and as a battery additive. As a separator‑coating material, compared with alumina, boehmite‑based coatings impart superior thermal stability, reduced thermal shrinkage, and enhanced electrolyte wettability to the coated separator, thereby improving insulation performance and reducing the risk of short circuits in lithium batteries. Moreover, owing to its lower hardness and density relative to alumina, boehmite can effectively reduce the overall weight of the coating material.
The wear and tear on the device and the weight of the battery.
Coating the edges of lithium‑battery electrode sheets with boehmite can prevent burrs generated during slitting from piercing the separator, thereby enhancing battery safety and yield. Moreover, owing to boehmite’s low magnetic impurity content, low water absorption, low bulk density, and low Mohs hardness, it helps improve the battery’s rate capability and cycle life, further boosting product yield.
Classification of boehmite to meet various coating requirements
Boehmite ZKB131T for lithium‑ion battery coating: applicable coating thickness of 4 µm or greater.
Boehmite ZKB331A for lithium‑ion battery separator coating: applicable coating thickness 2–4 µm.
Boehmite ZKB332A for lithium‑ion battery separator coating: applicable coating thickness ≤ 2 μm. -
Boehmite ZKB131T
Technical Specification for Boehmite Used in Lithium-Ion Batteries
Molecular formula: AlOOH
Molecular weight: 60
Technical Indicators:
Project
Technical indicators
ZKB131T
Testing method instrument
Purity, % ≥ - 99.9 ICP Appearance - White powder Visual inspection Median particle size, µm - 1.2~2.8 Laser particle size analyzer Specific surface area, m²/g - 2.0~8.0 Specific Surface Area Tester Moisture, ppm ≤ - 2000 Moisture meter pH - 6.0~8.5 pH meter Trace element content, ≤ ppm Sodium 500 ICP Iron 50 Calcium 500 Copper 5 Total magnetic substances, ppb ≤ - 200 ICP Boehmite ZKB331A
Technical Specification for Boehmite Used in Lithium-Ion Battery Coating
Molecular formula: AlOOH (denoted as A100H)
Molecular weight: 60
Technical Indicators:
Project
Technical indicators
ZKB331T
Testing method instrument
Purity, % ≥ - 99.9 ICP Appearance - White powder Visual inspection Median particle size, µm - 0.5~1.2 Laser particle size analyzer Specific surface area, m²/g - 4.0~8.0 Specific Surface Area Tester Moisture, ppm ≤ - 3500 Moisture meter pH - 6.0~9.5 pH meter Trace element content, ≤ ppm Sodium 500 ICP Iron 80 Calcium 150 Copper 20 Total magnetic substances, ppb ≤ - 200 ICP Boehmite ZKB332A
Technical Specification for Boehmite Used in Lithium-Ion Batteries
Molecular formula: AlOOH (denoted as A100H)
Molecular weight: 60
Technical Indicators:
Project
Technical indicators
ZKB332A
Testing method instrument
Purity, % ≥ - 99.9 ICP Appearance - White powder Visual inspection Median particle size, µm - 0.2~0.6 Laser particle size analyzer Specific surface area, m²/g - 10.0~30.0 Specific Surface Area Tester Moisture, ppm ≤ - 15000 Moisture meter pH - 5.0~8.5 pH meter Trace element content, ≤ ppm Sodium 500 ICP Iron 80 Calcium 500 Copper 5 Total magnetic substances, ppb ≤ - 200 ICP
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