Lithium ion secondary battery
A secondary battery, lithium ion technology, applied in the field of non-aqueous electrolyte batteries, can solve the problems of cathode deterioration, attacking lithium-nickel composite oxides, etc., to achieve the effect of preventing deterioration and improving cycle characteristics
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[0033] As the negative electrode active material, a 3.4 m 2 / g BET specific surface area of graphite powder. The graphite powder, as a conductive aid, has 62m 2 / g BET specific surface area carbon black powder (hereinafter referred to as "CB"), carboxymethyl cellulose as a binder resin (hereinafter referred to as "CMC") and styrene-butadiene copolymer latex (hereinafter (Referred to as "SBR") is mixed at a solid content mass ratio CB:CMC:SBR=0.3:1.0:2.0. After adding the obtained mixture to ion-exchanged water, it was stirred together with ion-exchange water. Thus, a slurry containing the material uniformly dispersed in water is prepared. The obtained slurry was coated on a copper foil having a thickness of 10 μm as a negative electrode current collector. Next, the electrode was heated at 125°C for 10 minutes to evaporate water. Thus, a negative electrode active material layer was formed. Furthermore, by pressing the negative electrode active mate...
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