High voltage lithium ion positive electrode material

A lithium-ion battery, the battery comprising:

• a positive electrode, comprising a compound of formula Li1+y/2Co1−x−y−z−dSizFexMyM′d(PO4) wherein,
• M is a trivalent cation selected from at least one of Cr, Ti, Al, Mn, Ni, V, Sc, La, and/or Ga;
• M′ is a divalent cation selected from at least one of Mn, Ni, Zn, Sr, Cu, Ca, and/or Mg;
• y is within a range of 0<y≤0.10;
• x is within a range of 0<x≤0.20;
• z is within a range of 0≤z≤0.10;
• and
• d is within a range of 0≤d≤0.20;
• the positive electrode material having an initial capacity of at least 120 mAhg−1;
• and
• a negative electrode;
• and
• an electrolyte.

A lithium-ion battery, the battery comprising:

• a positive electrode, comprising a compound of formula Li1+y/2Co1−x−y−z−dSizFexMyM′d(PO4) wherein,
• M is a trivalent cation selected from at least one of Cr, Ti, Al, Mn, Ni, V, Sc, La, and/or Ga;
• M′ is a covalent cation selected from at least one of Mn, Ni, Zn, Sr, Cu, Ca, and/or Mg;
• y is within a range of 0<y≤0.10;
• x is within a range of 0<x≤0.20;
• z is within a range of 0≤z≤0.10;
• and
• d is within a range of 0≤d≤0.20;
• the positive electrode material having a capacity of at least 100 mAhg−1 after 500 cycles;
• and
• a negative electrode;
• and
• an electrolyte.