A novel cathode Li2CoMn3O8 for lithium ion batteries operating over 5 volts

Abstract

The spinel phase, Li₂CoMn₃O₈ , can be used as a cathode in secondary lithium batteries, Li/LiPF₆ ,propylene carbonate/Li₂CoMn₃O₈ , with a discharge capacity of ca. 40 mAh g^–1 at 5.0 V increasing to ca. 130 mAh g^–1 at 3.8 V. This appears to be the first single cell system to operate reversibly over 5 volts.