Lithium-ion battery negative electrode sheet and lithium-ion battery with hard carbon and soft carbon as active materials
A lithium-ion battery and active material technology, which is applied in the field of lithium-ion battery manufacturing, can solve the problems such as the lack of very systematic research and analysis of hard carbon and soft carbon, the low initial charge and discharge efficiency of the graphite system, and the processing performance that is not as good as that of the graphite system. The effect of improving high current rate performance, improving charging performance, improving cycle performance and safety
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Embodiment 1
[0024] Embodiment 1: artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and SBR emulsion with a mass content of 40% are according to the weight of 91.5: 1.5: 1.0: 2.0: 4.0 Proportional mixing, as the first layer of graphite layer material, according to 40g / m on one side 2 The areal density is coated on both sides of the metal foil current collector, and dried to make a pole piece; the hard carbon material, soft carbon material, Super P (graphite), KS-6 (carbon black), carboxymethyl Sodium cellulose and SBR emulsion with a mass content of 40% are mixed to make a slurry, and the mass ratio of each component is 45.0:46.5:1.5:1.0:2.0:4.0, according to 90g / m on one side 2 The surface density of the primary pole piece is coated on both sides of the primary pole piece to make a secondary pole piece; artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and 40% of the mass content SBR emulsion is mixed...
Embodiment 2
[0025] Embodiment 2: the SBR emulsion of artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, mass content 40% is according to the weight of 91.5:1.5:1.0:2.0:4.0 Proportional mixing, as the first layer of graphite layer material, according to 40g / m on one side 2 The areal density of the metal foil is coated on both sides of the metal foil current collector, and dried to make a pole piece; the hard carbon material, Super P (graphite) KS-6 (carbon black), sodium carboxymethyl cellulose, SBR emulsion with a mass content of 40% is mixed to make a slurry, and the mass ratio of each component is 91.5:1.5:1:2:4, according to 90g / m on one side 2 The surface density of the primary pole piece is coated on both sides of the primary pole piece to make a secondary pole piece; artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and 40% of the mass content SBR emulsion is mixed according to the weight ratio o...
Embodiment 3
[0026] Embodiment 3: the SBR emulsion of artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethylcellulose, mass content 40% is according to the weight of 91.5:1.5:1.0:2.0:4.0 Proportional mixing, as the first layer of graphite layer material, according to 40g / m on one side 2 The areal density of the metal foil is coated on both sides of the metal foil current collector, and dried to make a pole piece; the soft carbon material, Super P (graphite) KS-6 (carbon black), sodium carboxymethyl cellulose, SBR emulsion with a mass content of 40% is mixed to make a slurry, and the mass ratio of each component is 91.5:1.5:1:2:4, according to 90g / m on one side 2 The surface density of the primary pole piece is coated on both sides of the primary pole piece to make a secondary pole piece; artificial graphite, Super P (graphite), KS-6 (carbon black), sodium carboxymethyl cellulose, and 40% of the mass content SBR emulsion is mixed according to the weight ratio of...
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