Non-aqueous electrolytic solution secondary battery
View Patent ↗A non-aqueous electrolytic solution secondary battery includes a positive electrode containing, as a positive electrode active material, a compound represented by the following general formula, Li x Fe 1-y M y PO 4 , wherein M is at least one member selected from the group consisting of Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca and Sr; 0.9<x<1.2; and 0≦y<0.3; a negative electrode containing a lithium metal, a lithium alloy or a material capable of doping and dedoping lithium; and a non-aqueous electrolytic solution, the non-aqueous electrolytic solution containing a fluorinated ethylene carbonate FEC.
1. A non-aqueous electrolytic solution secondary battery comprising:
a positive electrode containing a positive electrode active material, the positive electrode active material consisting essentially of a compound represented by a following general formula:
Li x Fe 1-y M y PO 4
wherein M is at least one member selected from the group consisting of Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca and Sr; 0.9<x<1.2; and 0<y<0.3;
a negative electrode containing a lithium metal, a lithium alloy or a material capable of doping and dedoping lithium; and
a non-aqueous electrolytic solution,
the non-aqueous electrolytic solution containing a fluorinated ethylene carbonate FEC, wherein the content of the FEC in the non-aqueous electrolytic solution ranges from 0.5% to 10% by mass in relation to the non-aqueous electrolytic solution, wherein the non-aqueous electrolytic solution further contains LiPF 6 .
2. A non-aqueous electrolytic solution secondary battery comprising:
a positive electrode containing a positive electrode active material, the positive electrode active material consisting essentially of a compound represented by a following general formula:
Li x Fe 1-y M y PO 4
wherein M is at least one member selected from the group consisting of Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca and Sr; 0.9<x<1.2; and 0≦y<0.3;
a negative electrode containing a lithium metal, a lithium alloy or a material capable of doping and dedoping lithium; and
a non-aqueous electrolytic solution,
the non-aqueous electrolytic solution containing a fluorinated ethylene carbonate FEC selected from the group consisting of 4,4-difluoroethylene carbonate, 4,5-difluoroethylene carbonate, 4,4,5-trifluoroethylene carbonate and 4,4,5,5-tetrafluoroethylene carbonate, wherein the content of the FEC in the non-aqueous electrolytic solution ranges from 0.5% to 10% by mass in relation to the non-aqueous electrolytic solution, wherein the non-aqueous electrolytic solution further contains LiPF 6 .
3. The non-aqueous electrolytic solution secondary battery according to claim 2 , wherein the compound represented by the general formula, Li x Fe 1-y M y PO 4 is LiFePO 4 .