HIGH CAPACITY LITHIUM-ION ELECTROCHEMICAL CELLS

摘要

A lithium-ion electrochemical cell is provided that has high total energy, high energy density and good performance upon repeated charge-discharge cycles. The cell includes a composite positive electrode that comprises a metal oxide electrode material, a composite negative electrode that comprises a alloy anode active material having a first cycle irreversible capacity of 10 percent or higher and an electrolyte. The first cycle irreversible capacity of the composite positive electrode is within 40 percent of the first cycle irreversible capacity of the composite negative electrode.