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Preparation method of lithium ion battery anode piece and lithium ion battery
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A technology for lithium-ion batteries and negative pole pieces, which is applied to battery electrodes, secondary batteries, circuits, etc., can solve the problems of slurry settlement and difficult dispersion of slurry, and achieve improved bonding strength, high stability, and improved battery performance. The effect of cycle performance
Inactive Publication Date: 2018-08-03
上海汇平新能源有限公司
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Problems solved by technology
However, in the production process, problems such as slurry difficulty in dispersion and slurry settlement often occur
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Embodiment 1
[0031] a, take by weighing 100 parts by weight of graphite negative electrode, 2 parts by weight of carbon black (Super-P), 1.5 parts by weight of thickener (CMC), mix and stir;
[0032] b. Weigh 0.1 parts by weight of the Bic additive LAPONITE-RD and add it to deionized water, mix it evenly, add it to the mixture in step a, and stir for 1-5 hours;
[0033] c, add 1.5 parts by weight of SBR emulsion, continue to stir for 0.5 hour, obtain negative electrode slurry;
[0034] d, coating the negative electrode slurry on the negative electrode current collector, and drying to obtain the negative electrode sheet;
[0035] e. Roll the resulting negative electrode sheet to 1.6g / cm 3 The compacted density is divided into strips and assembled into lithium-ion batteries.
Embodiment 2
[0037] a, take by weighing 100 parts by weight of graphite negative electrode, 2 parts by weight of carbon black (Super-P), 1.5 parts by weight of thickener (CMC), mix and stir;
[0038] b. Weigh 0.3 parts by weight of the Bic additive LAPONITE-RD and add it to deionized water, mix it evenly, add it to the mixture in step a, and stir for 1-5 hours;
[0039] c, add 1.5 parts by weight of SBR emulsion, continue to stir for 0.5 hour, obtain negative electrode slurry;
[0040] d, coating the negative electrode slurry on the negative electrode current collector, and drying to obtain the negative electrode sheet;
[0041] e. Roll the resulting negative electrode sheet to 1.6g / cm 3 The compacted density is divided into strips and assembled into lithium-ion batteries.
Embodiment 3
[0052] a. Take 100 parts by weight of silicon carbon negative electrode, 3 parts by weight of carbon black (Super-P), 2 parts by weight of thickener (CMC), mix and stir evenly;
[0053] b. Weigh 0.6 parts by weight of Bic additive LAPONITE-RD and add it to deionized water, mix it evenly, add it to the mixture in step a, and stir for 1-5 hours;
[0054] c, add 2 parts by weight of SBR emulsion, continue to stir for 0.5 hour, obtain negative electrode slurry;
[0055] d, coating the negative electrode slurry on the negative electrode current collector, and drying to obtain the negative electrode sheet;
[0056] e. Roll the resulting negative electrode sheet to 1.6g / cm 3 The compacted density is divided into strips and assembled into lithium-ion batteries.
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Abstract
The invention relates to a preparation method of a lithiumion battery anode piece containing an anodeslurry additive and a lithiumion battery. The preparation method comprises the following steps:weighing 100 parts by weight of an anode active material, 1-3 parts by weight of a conductive agent and 1-3 parts by weight of a thickening agent for mixing and uniform stirring; uniformly mixing 0.2-2 parts by weight of a slurry additive and deionized water; adding the mixture to the anode material, and performing stirring for 1-5 hours; adding 1-3 parts by weight of a binder and continuing stirring for 0.5 hours to obtain anode slurry; applying the slurry to a current collector and performing drying to obtain the anode piece; roll pressing and cutting the anode piece to obtain a final anodepiece. The lithiumion battery is prepared with the obtained anode piece. The preparation method and the lithium ion battery have the beneficial effects that bonding strength of an electrode coatingis improved, so that cycle performance of the battery is improved.
Description
technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for preparing a lithium ion battery negative pole piece containing a slurry additive and the lithium ion battery. Background technique [0002] As a clean and efficient portable energy storage device, lithium-ion batteries have developed rapidly in recent years, especially in the application of new energy pure electric vehicles and hybrid vehicles. With the commercial development of lithium-ion batteries, people have higher and higher performance requirements for lithium-ion batteries. The current is charged and discharged quickly, and even requires its charge and discharge cycle life to reach the service life of the car. [0003] The preparation process of lithium-ion batteries is relatively complicated. Among them, the preparation of positive and negative electrode pastes and the coating of positive and negative electrodes have a greater impact on batter...
Claims
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