LITHIUM-ION CELL-BASED ON ORTHORHOMBIC LIMNO2

This paper will demonstrate that cathodes based on the high temperatur e form of orthorhombic LiMnO2, with the structure described by Hoppe, Brachtel and Jansen, have good capacity and cycle life. X-ray diffract ion studies have revealed that cathodes prepared from orthorhombic LiM nO2 undergo a structural change on being charged beyond a certain pote ntial in which the original structure is converted to spinel Li1-xMn2O 4. Orthorhombic LiMnO2 has been found to have long-term stability in a mbient conditions and is easily prepared in a one-step reaction.