Non-aqueous electrolyte secondary cell, negative electrode...

Details Non-aqueous electrolyte secondary cell, negative electrode... Non-aqueous electrolyte secondary cell, negative electrode...

H - Electricity

01

M

H01M 4/62 (2006.01) H01M 4/02 (2006.01) H01M 4/04 (2006.01) H01M 4/58 (2006.01) H01M 10/40 (2006.01) H01M 6/10 (2006.01)

Patent

CA 2281526

A graphite material capable of occluding and releasing lithium is used as a material of the negative electrode of a non-aqueous electrolyte secondary cell, and the negative electrode material is bound by at least one selected from polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-propylene-vinyl acetate copolymer, and polypropylene. The cell is provided with this negative electrode, a rechargeable positive electrode, and a non-aqueous electrolyte; therefore, the resistance of the mix of the negative electrode against separation is strong, the cell is easily handled, the reliability in the mass-production process is high, and the low- temperature discharge characteristics and cycle characteristics are excellent.

L'invention porte sur un matériau graphité, pouvant capturer et libérer du lithium, et constitutif de l'électrode négative d'un élément d'accumulateur à électrolyte non aqueux. Ledit matériau est lié au moyen d'au moins l'une des résines suivantes: copolymère d'éthylène-acétate de vinyle, copolymère d'éthylène-propylène-acétate de vinyle, ou polypropylène. L'élément comprend ladite électrode, une électrode positive rechargeable et un électrolyte non aqueux. La résistance de l'électrode négative à la séparation est élevée, l'élément est facile à manipuler, la fiabilité du processus de production industrielle est très bonne et les caractéristiques de décharge à basse température et de cycle sont excellentes.

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