CN-122025633-A - Polymeric adhesive for electrochemical cells including labels

CN122025633ACN 122025633 ACN122025633 ACN 122025633ACN-122025633-A

Abstract

The invention provides an electrode material. The electrode material includes an active material, a non-fluorinated polymeric binder including a detectable label, and a conductive filler.

Inventors

N. Harding
K.LI
S. Kotabe

Assignees

通用汽车环球科技运作有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250106
Priority Date: 20241112

Claims (10)

1. An electrode material comprising: An active material; a non-fluorinated polymeric binder comprising a detectable label, and And conductive filler.
2. The electrode material of claim 1, wherein the non-fluorinated polymeric binder comprises a first repeating unit derived from a first monomer comprising the detectable label.
3. The electrode material of claim 1, wherein the non-fluorinated polymeric binder further comprises: A second repeat unit derived from one or more second monomers selected from the group consisting of (meth) acrylates, vinyl aromatics, vinyl ethers, vinyl ketones, and vinyl esters; Crosslinkable groups, crosslinking groups, or combinations thereof, or A combination thereof.
4. The electrode material of claim 1, wherein the detectable label comprises fluorescein or a derivative thereof, rhodamine or a derivative thereof, acridine or a derivative thereof, coumarin or a derivative thereof, eosin or a derivative thereof, erythrosin or a derivative thereof, pyrene or a derivative thereof, or a combination thereof.
5. The electrode material of claim 1, wherein the non-fluorinated polymeric binder is prepared by free radical polymerization of: A first monomer comprising the detectable label; one or more second monomers selected from the group consisting of (meth) acrylates, vinylaromatic compounds, vinyl ethers, vinyl ketones and vinyl esters, and Optionally, a third monomer comprising a crosslinkable group, a crosslinking group, or a combination thereof.
6. An electrochemical cell comprising: A positive electrode; A negative electrode, and An electrolyte is provided, which is a metal-containing electrolyte, Wherein at least one of the positive electrode or the negative electrode comprises the electrode material according to claim 1.
7. A method of measuring the distribution of binder in an electrode material, the method comprising: providing an electrode material according to claim 1; Exposing the electrode material to activating radiation sufficient to provide a quantitative signal from the detectable label, and The distribution of the non-fluorinated polymeric binder is determined based on the quantitative signal from the detectable label.
8. The method of claim 7, further comprising charging and discharging an electrochemical cell containing the electrode material prior to the step of providing the electrode material.
9. The method of claim 7, wherein the non-fluorinated polymeric binder comprises a first repeating unit derived from a first monomer comprising the detectable label.
10. The method of claim 7, wherein the non-fluorinated polymeric binder further comprises: A second repeat unit derived from one or more second monomers selected from the group consisting of (meth) acrylates, vinyl aromatics, vinyl ethers, vinyl ketones, and vinyl esters; A third repeating unit comprising a crosslinkable group, a crosslinking group, or a combination thereof, or A combination thereof.

Description

Polymeric adhesive for electrochemical cells including labels Technical Field The present invention relates to cell technology, and more particularly to polymeric binders for electrodes in electrochemical cells. Background High voltage electrical systems are increasingly being used to power the on-board functions of mobile and stationary systems. For example, in motor vehicles, the need to increase fuel economy and reduce emissions has led to the development of advanced Electric Vehicles (EVs). EVs rely on a Rechargeable Energy Storage System (RESS), typically comprising one or more high voltage battery packs, and an electric drivetrain to deliver power from the battery to the wheels. The battery pack may include any number of interconnected battery modules depending on the power requirements of a given application. Each battery module includes a collection of conductively coupled electrochemical cells. The battery pack is configured to provide a Direct Current (DC) output voltage at a level suitable for powering a coupled electrical and/or mechanical load, such as an electric motor. The electrodes in a battery are one of the key components responsible for the electrochemical reactions that take place during charge and discharge. Modern automotive high voltage battery packs benefit from high energy density electrodes to improve overall performance and range. However, there is still a continuing need for a fluorine-free polymeric binder material, and related ability to quantitatively determine the distribution and final migration of the polymeric binder in the electrode material during battery assembly and subsequent operation. Disclosure of Invention In one aspect, an electrode material is provided. The electrode material includes an active material, a non-fluorinated polymeric binder including a detectable label, and a conductive filler. In another embodiment of the electrode material, the non-fluorinated polymeric binder comprises a first repeating unit derived from a first monomer comprising a detectable label. In another embodiment of the electrode material, the non-fluorinated polymeric binder further comprises a second repeating unit derived from one or more second monomers selected from the group consisting of (meth) acrylates, vinyl aromatics, vinyl ethers, vinyl ketones, and vinyl esters. In another embodiment of the electrode material, the non-fluorinated polymeric binder further comprises a third repeating unit comprising a crosslinkable group, a crosslinking group, or a combination thereof. In another embodiment of the electrode material, the detectable label comprises fluorescein or a derivative thereof, rhodamine or a derivative thereof, acridine or a derivative thereof, coumarin or a derivative thereof, eosin or a derivative thereof, erythrosin or a derivative thereof, pyrene or a derivative thereof, or a combination thereof. In another embodiment of the electrode material, the non-fluorinated polymeric binder is prepared by free radical polymerization of a first monomer comprising a detectable label, one or more second monomers selected from the group consisting of (meth) acrylates, vinyl aromatics, vinyl ethers, vinyl ketones, and vinyl esters, and optionally, a third monomer comprising a crosslinkable group, a crosslinking group, or a combination thereof. In another embodiment of the electrode material, the electrode material does not include a fluorinated binder. In another aspect, an electrochemical cell is provided that includes a positive electrode, a negative electrode, and an electrolyte. At least one of the positive electrode or the negative electrode comprises an electrode material as described herein. In another embodiment of an electrochemical cell, a non-fluorinated polymeric binder includes a first repeating unit derived from a first monomer including a detectable label. In another embodiment of the electrochemical cell, the non-fluorinated polymeric binder further comprises a second repeat unit derived from one or more second monomers selected from the group consisting of (meth) acrylates, vinyl aromatics, vinyl ethers, vinyl ketones, and vinyl esters. In another embodiment of the electrochemical cell, the non-fluorinated polymeric binder further comprises a third repeating unit comprising a crosslinkable group, a crosslinking group, or a combination thereof. In another embodiment of the electrochemical cell, the detectable label comprises fluorescein or a derivative thereof, rhodamine or a derivative thereof, acridine or a derivative thereof, coumarin or a derivative thereof, eosin or a derivative thereof, erythrosin or a derivative thereof, pyrene or a derivative thereof, or a combination thereof. In another embodiment of the electrochemical cell, the non-fluorinated polymeric binder is prepared by free radical polymerization of a first monomer comprising a detectable label, one or more second monomers selected from the group consisting of (meth) acrylates, vinyl aromatics,