Dry-method positive pole piece of lithium ion secondary battery and preparation method of dry-method positive pole piece
A technology for positive pole pieces and secondary batteries, which is applied in the field of dry-process positive pole pieces and its preparation, which can solve the problems of increasing battery resistivity, high battery manufacturing costs, and cracking battery performance, so as to improve the degree of dispersion and save manufacturing costs , Improve the effect of mixing degree
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Embodiment 1
[0041] This embodiment provides a preparation of lithium iron phosphate positive pole piece of lithium ion secondary battery, the steps are as follows:
[0042] (1) Powder ingredients: the positive electrode main material powder and the conductive agent SP are uniformly mixed for 2 hours through a high-speed dispersing kneader, and the linear speed is 25m / s to obtain a powder; the positive electrode main material and the conductive agent in the obtained powder have a mass ratio of 96:4;
[0043] (2) Carrier preheating: 70% porosity, 10g / m 2 Heat the PTFE non-woven fabric with surface density to 120°C, and place it at a distance of 40mm directly below the high-speed jet machine;
[0044] (3) Preparation of electrode coating: The mixed powder is sprayed vertically downward at a speed of 10m / s in a high-speed jet machine, and sputtered on the inside and surface of the PTFE non-woven fabric to obtain a surface density of 170g / m 2 The electrode coating; the lower part of the PTFE n...
Embodiment 2
[0048] This embodiment provides a kind of preparation of lithium-ion secondary battery ternary nickel cobalt lithium manganese oxide positive pole piece, the steps are as follows:
[0049] (1) Powder ingredients: The positive electrode main material powder and the conductive agent SP are uniformly mixed for 2 hours through a high-speed dispersing kneader, and the linear speed is 30m / s to obtain a powder; the positive electrode main material and the conductive agent in the obtained powder have a mass ratio of 97:3;
[0050] (2) Carrier preheating: 80% porosity, 10g / m 2 Heat the PTFE non-woven fabric with surface density to 120°C, and place it at a distance of 60mm directly below the high-speed jet machine;
[0051] (3) Preparation of electrode coating: The mixed powder is sprayed vertically downward at a speed of 15m / s in a high-speed jet machine, and sputtered on the inside and surface of PTFE non-woven fabric to form a surface density of 180g / m 2 The electrode coating; the ...
Embodiment 3
[0055] This embodiment provides a preparation of lithium manganate positive electrode sheet for a lithium ion secondary battery, the steps are as follows:
[0056] (1) Powder ingredients: The positive electrode main material powder and the conductive agent SP are uniformly mixed for 2 hours through a high-speed dispersing kneader, and the linear speed is 30m / s to obtain a powder; the positive electrode main material and the conductive agent in the obtained powder have a mass ratio of 95:5;
[0057] (2) Carrier preheating: 80% porosity, 12g / m 2 Heat the surface density PTFE non-woven fabric to 120°C, and place it at a distance of 100mm directly below the high-speed jet machine;
[0058] (3) Preparation of electrode coating: The mixed powder is sprayed vertically downward at a speed of 20m / s in a high-speed jet machine, and sputtered on the inside and surface of PTFE non-woven fabric to form a surface density of 190g / m 2 The electrode coating; the lower part of PTFE is equippe...
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Abstract
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Application Information

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