Method for separating or recovering materials from electrodes, method for producing an electrode, and electrode

Abstract

A method for separating or recovering materials from electrodes includes: providing a substrate, in particular an electrode substrate, to which a coating has been applied; and at least partially stripping the coating from the substrate by snow blasting.

Claims

1. A method for separating or recovering materials from electrodes, the method comprising: providing a substrate including a coating thereon, the substrate comprising a carrier material of a first electrode; producing accelerated CO.sub.2 snow particles by snow blasting; exposing the coating to the accelerated CO.sub.2 snow particles and selectively removing coating material from some areas of the substrate, a first portion of the coating being removed while a second portion of the coating remains on the substrate; after exposing the coating to the accelerated CO.sub.2 snow particles, compacting the coating for production of the first electrode; producing purified and/or prepared coating material from the coating material removed from the substrate; and utilizing some or all of the purified and/or prepared coating material to coat another carrier material for production of a second electrode.

2. The method according to claim 1, further comprising: collecting the coating material removed from the substrate by suctioning.

3. The method according to claim 1, wherein producing the purified and/or prepared coating material comprises material separation, whereby active material, conductive carbon black, solvent, binder, and/or additives are separated from the coating material removed from the substrate.

4. The method according to claim 1, wherein producing the purified and/or prepared coating material comprises crushing and/or pulverizing the coating material removed from the substrate.

5. The method according to claim 1, further comprising: feeding the purified and/or prepared coating material to a mixing process to generate a recycled coating material.

6. The method according to claim 1, further comprising one or more blasting nozzles fixed in place or fastened on a movable robot arm for producing the accelerated CO.sub.2 snow particles.

7. The method according to claim 1, wherein the substrate is continuously fed into a chamber for removal of the coating material.

8. The method according to claim 1, wherein the substrate is stationary during removal of the coating material.

Description

BRIEF DESCRIPTION OF THE FIGURE

(1) In the figure:

(2) FIG. 1: shows a diagram to illustrate an embodiment of the method.

DETAILED DESCRIPTION OF THE FIGURE

(3) FIG. 1 shows a schematic view of an electrode 10 comprising a substrate 20, in particular a carrier material, such as an aluminum foil or a copper foil, having a coating 30 arranged thereon. The coating 30 is removed from the substrate 20 by CO.sub.2 snow blasting. This is indicated via the schematic spray lance, which has the reference sign 40. In the present case, it is shown that the carrier material 20 is moved along a conveyance direction F. The spray lance 40 is arranged fixed in place, for example. The angle of the spray lance 40 relative to the carrier material 20 can be adjusted if needed. According to one embodiment, multiple such spray lances are provided along the conveyance direction F. Additionally or alternatively, multiple spray lances 40 are provided adjacent to one another. Furthermore, one such spray lance 40 can alternatively also be fastened on an industrial robot, so that its alignment and position relative to the carrier material 20 can be adapted as desired. The carrier material 20 can also be transported along the conveyance direction F in this case. Alternatively, it can also rest.

LIST OF REFERENCE SIGNS

(4) 10 electrode 20 substrate, carrier material 30 coating 40 spray lance F conveyance direction