Abstract: A cathode for use in a lithium ion battery includes an active material present in an amount of from 70 to 99 weight percent, wherein the active material includes a lithium rich nickel manganese oxide; a conductive network of a mixture of conductive elements present in an amount of from 0.25 to 20 weight percent, wherein the mixture of conductive elements includes two or more of low aspect ratio particles, plate-like particles, and needle-like particles; and a binder system present in an amount of from 0.25 to 10 weight percent, wherein the binder system includes a primary binder polymer and an acid group or a salt thereof, wherein the amounts are based on a total weight of the cathode.

Abstract: An electrode for an electrochemical cell includes an electroactive material and an electrolyte that includes a lithium-salt additive and a solvent. The electroactive material is represented by: xLi2MnO3·(1?x)LiMO2 where M is a transition metal selected from the group consisting of: nickel (Ni), manganese (Mn), cobalt (Co), aluminum (Al), iron (Fe), and combinations thereof and 0.01?x?0.99. The solvent is selected from the group consisting of: ethylene carbonate (EC), fluoroethylene carbonate (FEC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethylmethylcarbonate (EMC), ethylmethylcarbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), vinyl ethylene carbonate (VEC), tetramethylene sulfone (TMS), ethyl methyl sulfone (EMS), acetonitrile (AN), butyronitrile (BN), and combinations thereof. The electrolyte includes between about 0.001 wt. % and about 10 wt. % of the lithium-salt additive and has an overall salt concentration between about 0.1 mol/L and about 10 mol/L.