Patent ID: 8057935
Filing Date: 2011-11-15
Classification: H01M,Y02E,Y02P

Abstract:
1. A lithium-ion secondary battery, comprising: an electrode group formed by laminating or winding a negative electrode layer and a positive electrode layer so as to interpose a separator made of synthetic resin, the negative electrode layer containing a material capable of intercalating/deintercalating lithium-ion, and the positive electrode layer including a fluorinated lithium-containing metallic oxide; and a non-aqueous electrolyte containing lithium salt, where the electrodes are immersed, wherein the fluorinated lithium-containing metallic oxide is obtained by fluorination with fluorine gas of a metal oxide of formula wherein 0.6≦x<1, 0<y≦0.2, 0<z≦0.2 and x+y+z=1 and wherein a fluorine content of the fluorinated lithium-containing metallic oxide is from 0.01 to 0.2 wt % F.