Positive electrode material for lithium-ion battery and preparation method of positive electrode material
A lithium-ion battery and positive electrode material technology, applied in the field of lithium-ion battery positive electrode materials and its preparation, can solve the problems of large contact resistance, large impedance, large gaps, etc., to reduce internal resistance, eliminate negative effects, and reduce the difficulty of dispersion Effect
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Embodiment 1
[0036] Embodiment 1, differs from comparative example in that this embodiment comprises the following steps:
[0037] Step 1, kneading: lithium iron phosphate, methyl methacrylate, sodium lauryl sulfate (mass ratio is: lithium iron phosphate: methyl methacrylate: sodium lauryl sulfate=93 :1:1), NMP (solid content is 1%) mixed and then kneaded, the revolution is 60 turns / min, and the rotation is 500 turns / min; Kneading 2h obtains mixture 1; Conductive carbon black, polyvinylpyrrolidone (mass ratio is Conductive carbon black: polyvinylpyrrolidone=4.9:0.1) and NMP (solid content is 0.5%) are mixed and kneaded, the revolution is 60 revolutions / min, and the rotation is 500 revolutions / min; Kneading 2h obtains mixture 2; Mixture 1, mixture 2 (mass ratio is lithium iron phosphate: conductive carbon black=93:4.9) mixed together, continue kneading, revolution is 20 revolutions / min, and rotation is 300 revolutions / min; After kneading 2h, obtain polymer monomer, nano iron phosphate Mixe...
Embodiment 2
[0042] Embodiment 2 is different from Embodiment 1 in that this embodiment includes the following steps:
[0043] Step 1, kneading: lithium iron phosphate, methyl methacrylate, sodium lauryl sulfate (mass ratio is: lithium iron phosphate: methyl methacrylate: sodium lauryl sulfate=93 :1:1), NMP (solid content is 5%) are mixed and then kneaded, the revolution is 20 turns / min, and the rotation is 300 turns / min; Kneading 2h obtains mixture 1; Conductive carbon black, polyvinylpyrrolidone (mass ratio is Conductive carbon black: polyvinylpyrrolidone=4.9:0.1) and NMP (solid content is 2%) are mixed and kneaded, the revolution is 20 revolutions / min, and the rotation is 300 revolutions / min; Kneading 2h obtains mixture 2; Mixture 1, mixture 2 (mass ratio is lithium iron phosphate: conductive carbon black=93:4.9) mixed together, continue kneading, revolution is 20 revolutions / min, and rotation is 300 revolutions / min; After kneading 2h, obtain polymer monomer, nano iron phosphate Mixed ...
Embodiment 3
[0047] Embodiment 3 is different from Embodiment 1 in that this embodiment includes the following steps:
[0048] Step 1, kneading: lithium iron phosphate, methyl methacrylate, sodium lauryl sulfate (mass ratio is: lithium iron phosphate: methyl methacrylate: sodium lauryl sulfate=93 :1:1), NMP (solid content is 10%) mixed and kneaded, the revolution is 10 turns / min, and the rotation is 100 turns / min; Kneading 4h obtains mixture 1; Conductive carbon black, polyvinylpyrrolidone (mass ratio is Conductive carbon black: polyvinylpyrrolidone=4.9:0.1) and NMP (solid content is 5%) are mixed and kneaded, the revolution is 10 revolutions / min, and the rotation is 100 revolutions / min; kneading 4h obtains mixture 2; Mixture 1, mixture 2 (mass ratio is lithium iron phosphate: conductive carbon black=93:4.9) mixed together, continue kneading, revolution is 10 revolutions / min, and rotation is 100 revolutions / min; After kneading 4h, obtain polymer monomer, nano iron phosphate Mixed slurry w...
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Abstract
Description
Claims
Application Information
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