The diaphragm performance requirements of boehmite coatings:
(1) it has sufficient chemical and electrochemical stability and will not be corroded by the electrolyte.
It has excellent insulation, the battery works when the heat is exothermic, and the current is blocked effectively.
3. The plate structure, the coating has a gap, does not affect the penetration of lithium ion and the permeability of the diaphragm.
4. The particle size is small and the particles are uniform. The thickness of the diaphragm coating can be effectively reduced and the uniformity of the thickness can be ensured.
Good heat resistance, effectively improving the thermal stability of the diaphragm during the heat release of the lithium battery.
The low hardness, reduce mechanical wear of coating materials.
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