Lithium ion battery negative electrode piece using hard carbon and soft carbon as active materials and lithium ion battery
A lithium-ion battery and active material technology, applied in the field of lithium-ion battery manufacturing, can solve the problems of hard carbon and soft carbon without very systematic research and analysis, low initial charge and discharge efficiency of graphite system, and poor processing performance of graphite system, etc., to achieve The effect of improving high current rate performance, improving charging performance, improving cycle performance and safety
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[0024] Example 1: The weight of artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and SBR emulsion with a mass content of 40% is 91.5:1.5:1.0:2.0:4.0 Proportion mixing, as the first graphite layer material, according to 40g / m per side 2 The surface density is coated on both sides of the metal foil current collector, dried to make a primary pole piece; hard carbon material, soft carbon material, Super P (graphite), KS-6 (carbon black), carboxymethyl Base cellulose sodium and 40% by mass SBR emulsion are mixed to form a slurry, the mass ratio of each component is 45.0:46.5:1.5:1.0:2.0:4.0, according to 90g / m per side 2 The surface density is coated on both sides of the primary pole piece to make the secondary pole piece; artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, 40% by mass SBR emulsion is mixed according to the weight ratio of 91.5:2.5:2.0:2.0:2.0 as the material of the second graphite...
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[0025] Example 2: The weight of artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and SBR emulsion with a mass content of 40% is 91.5:1.5:1.0:2.0:4.0 Proportion mixing, as the first graphite layer material, according to 40g / m per side 2 The surface density is coated on both sides of the metal foil current collector, dried to make a primary pole piece; hard carbon material, Super P (graphite) KS-6 (carbon black), sodium carboxymethyl cellulose, SBR emulsion with a mass content of 40% is mixed to form a slurry, and the mass ratio of each component is 91.5:1.5:1:2:4, according to 90g / m per side 2 The surface density is coated on both sides of the primary pole piece to make the secondary pole piece; artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, 40% by mass SBR emulsion is mixed according to the weight ratio of 91.5:2.5:2.0:2.0:2.0 as the material of the second graphite layer, at 15g / m per sid...
Example Embodiment
[0026] Example 3: The weight of artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and SBR emulsion with a mass content of 40% is 91.5:1.5:1.0:2.0:4.0 Proportion mixing, as the first graphite layer material, according to 40g / m per side 2 The surface density is coated on both sides of the metal foil current collector, dried to make a primary pole piece; soft carbon material, Super P (graphite) KS-6 (carbon black), sodium carboxymethyl cellulose, SBR emulsion with a mass content of 40% is mixed to form a slurry, and the mass ratio of each component is 91.5:1.5:1:2:4, according to 90g / m per side 2 The surface density is coated on both sides of the primary pole piece to make the secondary pole piece; artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, 40% by mass SBR emulsion is mixed according to the weight ratio of 91.5:2.5:2.0:2.0:2.0 as the material of the second graphite layer, at 15g / m per sid...
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