US 12,472,457 B2
Gas recovery system and method of manufacturing electrode film
Shota Kinoshita, Nisshin (JP); Shigehiko Sugiura, Nisshin (JP); Atsuhito Ota, Nisshin (JP); Hironori Tatsumi, Kariya (JP); and Nobuhiko Matsuda, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Apr. 28, 2023, as Appl. No. 18/308,724.
Claims priority of application No. 2022-088378 (JP), filed on May 31, 2022.
Prior Publication US 2023/0381711 A1, Nov. 30, 2023
Int. Cl. B01D 53/32 (2006.01); B01D 53/04 (2006.01)
CPC B01D 53/0446 (2013.01) [B01D 53/0407 (2013.01); B01D 53/326 (2013.01); B01D 2257/504 (2013.01); B01D 2259/40083 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A gas recovery system configured to recover a recovery target gas from a gas mixture by causing an electrochemical reaction, the gas recovery system comprising:
a plurality of electrochemical cells stacked with each other; and
a gas passage formed between the plurality of electrochemical cells so as to allow the gas mixture to flow through the gas passage, wherein
each of the plurality of electrochemical cells having
a working electrode including an adsorbent configured to adsorb the recovery target gas, and
a counter electrode configured to exchange electrons with the working electrode, wherein
electron donation occurs from the counter electrode to the working electrode when a voltage is applied between the working electrode and the counter electrode, such that the adsorbent adsorbs the recovery target gas along with the electron donation,
at least one of the working electrode or the counter electrode includes an electrode film,
the electrode film includes a plurality of regions, each of which having a size smaller than a size of the electrochemical cell, and
a reducing part that reduces warpage of the electrode film is located adjacent to the plurality of regions.
 
5. A method of manufacturing an electrode film of at least one of a working electrode or a counter electrode in a gas recovery system configured to recover a recovery target gas from a gas mixture by causing an electrochemical reaction,
the gas recovery system comprising: a plurality of electrochemical cells stacked with each other; and a gas passage formed between the plurality of electrochemical cells so as to allow the gas mixture to flow through the gas passage,
the working electrode of the electrochemical cell includes an adsorbent configured to adsorb the recovery target gas,
the counter electrode of the electrochemical cell is configured to exchange electrons with the working electrode, wherein
electron donation occurs from the counter electrode to the working electrode when a voltage is applied between the working electrode and the counter electrode, such that the adsorbent adsorbs the recovery target gas along with the electron donation,
the electrode film includes a plurality of regions, each of which having a size smaller than a size of the electrochemical cell,
a reducing part that reduces warpage of the electrode film is located adjacent to the plurality of regions,
the method comprising:
placing a masking member including a plurality of openings on a substrate;
applying a constituent material of the electrode film to the substrate and the masking member;
forming the plurality of regions and the reducing part by removing the masking member after the applying is completed; and
drying the constituent material of the electrode film applied on the substrate.