Patent ID: 10050313

Abstract:
A lithium ion battery includes a positive and a negative electrode, and a nanoporous or microporous polymer separator soaked in electrolyte solution and disposed between the electrodes. At least two different chelating agents are included and selected to complex with: i) two or more different transition metal ions; ii) a transition metal ion in two or more different oxidation states; or iii) both i) and ii). The at least two different selected chelating agents are to complex with transition metal ions in a manner sufficient to not affect movement of lithium ions across the separator during operation of the battery. The chelating agents are: dissolved or dispersed in the electrolyte solution; grafted onto the polymer of the separator; attached to the binder material of the negative and/or positive electrode; disposed within pores of the separator; coated on a surface of the separator; and/or coated on a surface of an electrode.