Metal fluoride and phosphate nanocomposites as electrode materials

摘要

The present invention relates to primary and secondary electrochemical energy storage systems. More particularly, the present invention relates to such systems as battery cells, especially battery cells utilizing metal fluorides with the presence of phosphates or fluorophosphates, which use materials that take up and release ions as a means of storing and supplying electrical energy.

主权项

1. A battery cell comprising:
(a) a positive electrode comprising a nanocomposite; and (b) a solid electrolyte, wherein the positive electrode is characterized by a specific capacity of about 100 mAh/g to 600 mAh/g at a voltage of about 2 volts to about 4 volts when measured against a Li/Li+ reference potential, wherein the nanocomposite comprises a metal fluoride component, conductive matrix, and a phosphate matrix, wherein the metal fluoride component is characterized by a particle size about 1 nm to about 100 nm, wherein the metal fluoride component is selected from the group consisting of CuF2, BiF3, CoF3, AgF, MnF3, NiF2, and FeF3, and wherein the conductive matrix comprises sulfur.