IP Library › Patent Application 17946066
Patent Application
App. No. 17/946,066

OXIDATION RESISTANT SEPARATOR FOR A BATTERY

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
17/946,066
Abstract

A lithium ion rechargeable battery comprises: a negative electrode adapted to give up electrons during discharge, a positive electrode adapted to gain electrons during discharge, a microporous separator sandwiched between said positive electrode and said negative electrode, an organic electrolyte being contained within said separator and being in electrochemical communication with said positive electrode and said negative electrode, and an oxidative barrier interposed between said separator and said positive electrode, and thereby preventing oxidation of said separator.

Claims (21)

1 . A lithium ion rechargeable battery comprises:

a negative electrode adapted to give up electrons during discharge,

a positive electrode adapted to gain electrons during discharge,

a microporous separator sandwiched between said positive electrode and said negative electrode,

an organic electrolyte being contained within said separator and being in electrochemical communication with said positive electrode and said negative electrode, and

an oxidative barrier interposed between said separator and said positive electrode, and thereby preventing oxidation of said separator.

2 . The battery of claim 1 wherein said separator comprises a polypropylene membrane.

3 . The battery of claim 1 wherein said separator comprises a polyvinylidene fluoride membrane.

4 . The battery of claim 1 wherein said separator comprises a multi-layered separator wherein the layer facing the positive electrode being selected from the group consisting of polypropylene, halocarbons, copolymers thereof, and mixtures thereof.

5 . The battery of claim 1 wherein said oxidative barrier comprises a coating formed on said separator and in contact with said positive electrode.

6 . The battery of claim 5 wherein said coating comprises a polymer selected from the group consisting of polypropylene, halocarbons, co-polymers thereof, metal oxides, and mixtures thereof.

7 . The battery of claim 5 wherein said coating comprises an antioxidant.

8 . The battery of claim 7 wherein said antioxidant being selected from the group consisting of phenols, phosphorus containing compounds, sulfur containing compounds, and mixtures thereof.

9 . The battery of claim 1 wherein said oxidative barrier comprises a coating formed on said positive electrode and in contact with said separator.

10 . The battery of claim 9 wherein said coating comprises a polymer selected from the group consisting of polypropylene, halocarbons, co-polymers thereof, metal oxides, and mixtures thereof.

11 . The battery of claim 9 wherein said coating comprises an antioxidant.

12 . The battery of claim 11 wherein said antioxidant being selected from the group consisting of phenols, phosphorus containing compounds, sulfur containing compounds, and mixtures thereof.

13 . The battery of claim 1 wherein said oxidative barrier comprises antioxidants dispersed into the separator.

14 . The battery of claim 13 wherein said antioxidant being selected from the group consisting of phenols, phosphorus containing compounds, sulfur containing compounds, and mixtures thereof.

15 . The battery of claim 13 wherein said antioxidant further comprising about 1-10% by weight of said separator.

16 . The battery of claim 13 wherein said antioxidant being concentrated at the face of said separator adjacent said positive electrode.