| abstract |
Disclosed are a negative electrode mixture capable of improving cycle performance and a lithium ion battery having high cycle performance. A negative electrode mixture is composed of a negative electrode active material and a halogen-containing sulfide solid electrolyte glass ceramic, the negative electrode active material is graphite, and the halogen-containing sulfide solid electrolyte glass ceramic is represented by the following formula (1). It is. LaMbPcSdXeOf (1) (wherein L represents an alkali metal. M represents B, Al, Si, Ge, As, Se, Sn, Sb, Te, Pb, Bi, or a combination thereof. X Represents I, Cl, Br, F, or a combination thereof, a to f are 0 <a≰12, 0≰b≰0.2, c = 1, 0 <d≰9, 0 <e≰, respectively. 9, 0≰f≰9 is satisfied.) [Selection figure] None |