Guarantee of safety of power lithium battery
The diaphragm is a key material that directly determines the safety performance of the battery. As the capacity of lithium-ion batteries continues to increase, the energy stored inside is increasing, and it is possible that the temperature is too high to melt the diaphragm and cause a short circuit. If a layer of ultra-fine ultra-pure alumina coating is applied to the separator, short circuits between the electrodes can be avoided and the safety of the lithium battery can be improved.
Material introduction
The ultrafine alumina material for diaphragm coating is an ultrafine white powder with a size range of 400-500nm. It has excellent thermal conductivity, insulation, mechanical strength, thermal stability and other properties. It can be used for lithium battery diaphragms. Hole adjustment, heat conduction, high temperature resistance, and flame retardant functions greatly improve the high temperature resistance and safety performance of lithium batteries.
Application characteristics
1. Used as a lithium battery separator coating, it can effectively improve the high temperature resistance of the separator. Even if the internal temperature of the lithium battery is too high to cause the organic bottom film of the separator to melt, the alumina coating can maintain the integrity of the separator and prevent Short circuit
2. The ultrafine alumina particles have a concentrated particle size distribution, good dispersibility, and will not block the pores of the lithium battery diaphragm;
3. It can improve the mechanical properties of the diaphragm, improve the wettability of the diaphragm, increase the adsorption of the diaphragm to the electrolyte, and reduce the interface impedance of the diaphragm.