| abstract |
A lithium-ion battery includes positive and negative electrodes, and a nanoporous or microporous polymer separator between the positive and negative electrodes, immersed in an electrolyte solution. Chelating agents are also included for complexing transition metal ions without interfering with the movement of lithium ions across the separator during operation of the lithium ion cell. The chelating agent is: dissolved in the electrolyte solution; grafted onto the polymer of the separator as a substituted side group; attached to the binder material of the negative and/or positive electrodes; coated on the surface of the separator; and/or coated on The surface of the negative and/or positive electrode. The chelating agent is selected from: ion traps in molecular form selected from polyamines, thiols, and alkali metal salts of organic acids; polymers functionalized with alkali metal salts of organic acids; polymers functionalized with nitrogen-containing functional groups; A polymer functionalized with one or more functional groups. |