Chemically and Compositionally Modified Solid Solution Disordered Multiphase Nickel Hydroxide Positive Electrode for Alkaline Rechargeable Electrochemcial Cells

摘要

A high capacity, long cycle life positive electrode for use in an alkaline rechargeable electrochemical cell comprising: a solid solution nickel hydroxide material having a multiphase structure that comprises at least one polycrystalline gamma -phase including a polycrystalline gamma -phase unit cell comprising spacedly disposed plates with at least one chemical modifier incorporated around the plates, the plates having a range of stable intersheet distances corresponding to a 2+oxidation state and a 3.5+, or greater, oxidation state; and at least one compositional modifier incorporated into the solid solution nickel hydroxide material to promote the multiphase structure.