OXIDE COATINGS ON LITHIUM OXIDE PARTICLES

摘要

The present invention generally relates to unique coatings for use with energy storage particles, such as lithium oxide energy storage materials. The invention provides unique coatings for particles, unique particle/coating combinations, and unique methods for making coatings and/or coated particles. In one aspect of the invention, a particle is formed having a core and a coating. The particle may comprise a core having a material such as LiFePO₄, and a coating. The particle may be formed, in some embodiments, by using a non-stoichiometric combination of salts or other precursors, and sintering the same to form particles. LiFePO₄ may form as the core of the particle, while the remaining materials may form a coating around the LiFePO₄. Typically, the LiFePO₄ is crystalline while the coating is generally amorphous, and in some instances, the coating may prevent large crystals of LiFePO₄ from forming. However, in other embodiments, a coating may be applied to a particle after formation of the particle to form a core/coating structure. The particles disclosed herein may have a relatively high energy capacity, and thus may find use in batteries and other energy storage devices. Other aspects of the invention relate to devices comprising such particles, methods of making such particles, kits for making such particles, methods of promoting the making or use of such particles, and the like.