Lithium ion battery, negative electrode, negative electrode conductive paste and preparation method of negative electrode conductive paste
A lithium-ion battery and conductive paste technology, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of electrode sheet quality degradation, difficult to remove air bubbles, etc., and fully guarantee the quality of electrode sheets and load uniformity , improve energy density, good effect of component dispersion
Inactive Publication Date: 2018-09-28
TSINGHUA UNIV
6 Cites 19 Cited by
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The invention discloses lithium ion battery negative electrode conductive paste, and belongs to the field of lithium ion battery material manufacturing. The conductive paste comprises a thickening agent, a binding agent, a conductive agent, a defoaming agent, an active substance and a solvent, on the basis of 100% by mass of the conductive paste, the solid content accounts for 5-30%, and the massratio of the thickening agent, the binding agent, the defoaming agent and the active substance is (0.1-2.0):(0.5-15):(0.5-15):(0.1-5):(70-97.5). The conductive paste is an aqueous binding agent system, carboxymethyl cellulose is used as the thickening agent, and a silicon/silicon carbide/carbon compound is used as the active substance. Moreover, the invention also provides a preparation method ofthe conductive paste, a lithium ion battery negative electrode prepared by employing the conductive paste and a lithium ion battery. The half cell of the lithium ion battery, assembled by employing the negative electrode paste preparation method provided by the invention, has excellent cycle stability and initial coulombic efficiency.
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