Lithium battery diaphragm and preparation method thereof
A lithium battery diaphragm and raw material technology, applied in the field of lithium battery diaphragm and its preparation, can solve the problems of diaphragm porosity, poor gas permeability, etc., achieve improved puncture strength, improved charge and discharge performance, closed cell temperature, and increased capacity retention Effect
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Embodiment 1
[0025] A lithium battery separator of the present embodiment comprises the following raw materials in parts by weight:
[0026] 50 parts of polypropylene resin, 20 parts of polyethylene resin, 8-14 parts of graphene modified liquid, 4-8 parts of polyetherimide, 4-7 parts of aluminum oxide, 3-6 parts of rare earth lanthanum chloride, scaly 1-3 parts of mica, 4-10 parts of pore-forming agent, and 1-3 parts of pore-forming auxiliary agent.
[0027] The preparation method of the graphene-modified solution in this embodiment is to activate the graphene first, then add it to the olive oil in the oil bath, add it while stirring, then add nano-montmorillonite, and stir until the raw materials are fully mixed , you can.
[0028] The activation treatment of this embodiment uses ammonium bifluoride and ethanolamine to prepare the activator according to the weight ratio of 1:2, and the inter-activator and graphene are mixed and ultrasonically dispersed according to the weight ratio of 1:...
Embodiment 2
[0037] A lithium battery separator of the present embodiment comprises the following raw materials in parts by weight:
[0038] 60 parts of polypropylene resin, 30 parts of polyethylene resin, 14 parts of graphene modified liquid, 8 parts of polyetherimide, 7 parts of alumina, 6 parts of rare earth lanthanum chloride, 3 parts of scaly mica, 10 parts of pore-forming agent 3 parts, 3 parts of pore-forming additives.
[0039] The preparation method of the graphene-modified solution in this embodiment is to activate the graphene first, then add it to the olive oil in the oil bath, add it while stirring, then add nano-montmorillonite, and stir until the raw materials are fully mixed , you can.
[0040] In the activation treatment of this example, ammonium bifluoride and ethanolamine were used to prepare an activator at a weight ratio of 1:4, and an interactivator and graphene were mixed and ultrasonically dispersed at a weight ratio of 3:1 for 40 minutes.
[0041] The olive oil i...
Embodiment 3
[0047] A lithium battery separator of the present embodiment comprises the following raw materials in parts by weight:
[0048] 55 parts of polypropylene resin, 25 parts of polyethylene resin, 11 parts of graphene modified liquid, 6 parts of polyetherimide, 5.5 parts of alumina, 4.5 parts of rare earth lanthanum chloride, 2 parts of scaly mica, 6 pore-forming agents 2 parts, 2 parts of pore-forming additives.
[0049]The preparation method of the graphene-modified solution in this embodiment is to activate the graphene first, then add it to the olive oil in the oil bath, add it while stirring, then add nano-montmorillonite, and stir until the raw materials are fully mixed , you can.
[0050] In the activation treatment of this embodiment, ammonium bifluoride and ethanolamine were used to prepare an activator at a weight ratio of 1:3, and an interactivator and graphene were mixed and ultrasonically dispersed at a weight ratio of 2:1 for 35 minutes.
[0051] The olive oil in t...
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