Patent ID: 9312564
Filing Date: 2016-04-12
CPC Classification: H01M,Y02E

Claim Text:
1. A positive electrode having a surface on which a positive electrode active material composition including a positive electrode active material is formed, the positive electrode comprising: a solid solution having an open-circuit voltage less than 3 V with respect to lithium metal; and a lithium compound having an open-circuit voltage of 3 V or greater with respect to lithium metal, wherein: the solid solution is represented by Formula 1 below: M is at least one of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), and copper (Cu); M′ is at least one of magnesium (Mg), aluminum (Al), zinc (Zn), zirconium (Zr), gallium (Ga), and germanium (Ge); M″ is at least one of aluminum (Al), gallium (Ga), germanium (Ge), magnesium (Mg), niobium (Nb), zinc (Zn), cadmium (Cd), titanium (Ti), cobalt (Co), nickel (Ni), potassium (K), sodium (Na), calcium (Ca), silicon (Si), iron (Fe), copper (Cu), tin (Sn), vanadium (V), boron (B), phosphorus (P), selenium (Se), bismuth (Bi), arsenic (As), zirconium (Zr), manganese (Mn), chromium (Cr), strontium (Sr), vanadium (V), scandium (Sc), yttrium (Y), and a rare-earth element; x, y and z satisfy 0<x<0.5, 0≦y<0.5, and 0.7<z<1.3 respectively; and a, b and c satisfy 0.1≦a≦2.3, 0≦b≦0.3, and 0.7≦c≦1.1, respectively, wherein the Li