A composition for use in a battery electrode comprising a compound including lithium, manganese, nickel, and oxygen. The composition is characterized by a powder X-ray diffraction pattern having peaks including 18.6.+-.0.2, 35.0.+-.0.2, 36.4.+-.0.2, 37.7.+-.0.2, 42.1.+-.0.2, and 44.5.+-.0.2 degrees 2.theta. as measured using Cu K.sub..alpha. radiation.
GOVERNMENT LICENSE RIGHTS
This invention was made with government support under DE-FE0005382 (Subcontract LS-111201A-MMW) awarded by the Department of Energy. The government has certain rights in the invention.