Lithium ion battery

摘要

In a lithium ion battery, one or more chelating agents may be attached to a microporous polymer separator for placement between a negative electrode and a positive electrode or to a polymer binder material used to construct the negative electrode, the positive electrode, or both. The chelating agents may comprise, for example, at least one of a crown ether, a podand, a lariat ether, a calixarene, a calixcrown, or mixtures thereof. The chelating agents can help improve the useful life of the lithium ion battery by complexing with unwanted metal cations that may become present in the battery's electrolyte solution while, at the same time, not significantly interfering with the movement of lithium ions between the negative and positive electrodes.

主权项

1. A microporous polymer separator for use in a lithium ion battery, comprising:
one or more chelating agents attached to the microporous polymer separator, wherein the one or more chelating agents complex with metal cations but do not strongly complex with lithium ions so that the movement of lithium ions across the microporous polymer separator during operation of the lithium ion battery is not substantially affected.