Method for recycling electrode scraps, and method for manufacturing electrode by using same
AssigneeLG Energy Solution, Ltd.
InventorsJun-Muk Lim, Joo-Yul Baek, Hee-Seok Song, Seong-Keun Jang, Woo-Ha Kim, Sang-Hoon Choy
Life of this patent
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Abstract
Provided are a reuse method of electrode scrap and a method of fabricating a recycled electrode using the same. The reuse method of electrode scrap of the present disclosure includes (a) dry milling electrode scrap remaining after punching an electrode sheet including an active material layer on a current collector to obtain milled products; and (b) screening active material layer flakes from current collector fragments in the milled products by sieving the milled products, and collecting the screened active material layer flakes to obtain reusable particles.
Claims12
A method of reusing an electrode scrap, comprising:
- dry milling an electrode scrap remaining after punching an electrode sheet including an active material layer on a current collector to obtain milled products;
- screening active material layer flakes from current collector fragments in the milled products by sieving the milled products to produce screened active material layer flakes;
- and
- collecting the screened active material layer flakes to obtain reusable particles,
- wherein
- the screening comprises separating the active material layer flakes from the current collector fragments in the milled products stepwise according to size by sieving the milled products in a sequential order using a plurality of sieves having different mesh sizes;
- and
- the collecting comprises collecting smallest sized active material layer flakes and active material layer flakes that are at least one size bigger than the smallest sized active material layer flakes to obtain reusable particles.
A method of fabricating a recycled electrode, comprising:
- dry milling an electrode scrap remaining after punching an electrode sheet including an active material layer on a current collector to obtain milled products;
- screening active material layer flakes from current collector fragments in the milled products by sieving the milled products to produce screened active material layer flakes;
- collecting the screened active material layer flakes to obtain reusable particles;
- and
- using the reusable particles alone without composition adjustment, or in combination with a same slurry as a slurry used to form the active material layer to fabricate another electrode,
- wherein
- the screening comprises separating the active material layer flakes from the current collector fragments in the milled products stepwise according to size by sieving the milled products in a sequential order using a plurality of sieves having different mesh sizes;
- and
- the collecting comprises collecting smallest sized active material layer flakes and active material layer flakes that are at least one size bigger than the smallest sized active material layer flakes to obtain the reusable particles.
Dependencies are inferred from the claim text.