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公开(公告)号：US20240021857A1
公开(公告)日：2024-01-18
申请号：US18349205
申请日：2023-07-10
Applicant: DENSO CORPORATION
Inventor： Hironori TATSUMI , Nobuhiko MATSUDA , Shota KINOSHITA , Atsuhito OTA
IPC: H01M8/0656 , H01M4/88 , H01M4/86
CPC classification number: H01M8/0656 , H01M4/8875 , H01M4/8626
Abstract: An electrochemical cell includes a working electrode and a counter electrode. The working electrode is configured to adsorb and desorb a recovery target gas from a mixed gas containing the recovery target gas by electrochemical reaction. The counter electrode is configured to exchange electrons with the working electrode. The working electrode has a volume porosity that is equal to or greater than a volume porosity of the counter electrode.
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公开(公告)号：US20230381713A1
公开(公告)日：2023-11-30
申请号：US18308713
申请日：2023-04-28
Applicant: DENSO CORPORATION
Inventor： Shota KINOSHITA , Naohisa OYAMA , Hironori TATSUMI
CPC classification number: B01D53/326 , B01D53/0407 , B01D2257/504
Abstract: A gas adsorption system includes: a first electrode film configured to adsorb and desorb a target gas from a mixed gas containing the target gas to be recovered by an electrochemical reaction; and a second electrode film having an active material to transfer electrons to and from the first electrode film. The active material has a particle size less than or equal to 10 μm.
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公开(公告)号：US20230381715A1
公开(公告)日：2023-11-30
申请号：US18318757
申请日：2023-05-17
Applicant: DENSO CORPORATION
Inventor： Hiroki TAKEZAKI , Hiroaki UMEDA , Hironori TATSUMI
CPC classification number: B01D53/326 , B01D53/04 , B01D2253/204 , B01D2256/22 , B01D2257/504 , B01D2255/1021 , B01D2255/1026 , B01D2255/402 , B01D2255/806 , B01D2255/1028 , B01D2255/2073
Abstract: A carbon dioxide recovery system separates CO2 from gas containing CO2 via an electrochemical reaction. The carbon dioxide recovery system includes an electrochemical cell including a working electrode and a counter electrode. The working electrode includes CO2 adsorbent. The CO2 adsorbent adsorbs CO2 via an oxygen reduction reaction by using electrons supplied from the counter electrode to the working electrode when a first voltage is applied between the working electrode and the counter electrode. The oxygen reduction reaction produces active oxygen via reduction of O2. The CO2 adsorbent desorbs CO2 by discharging electrons from the working electrode to the counter electrode when a second voltage different from the first voltage is applied between the working electrode and the counter electrode. The CO2 adsorbent has a promoting function for promoting the oxygen reduction reaction.
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公开(公告)号：US20250135396A1
公开(公告)日：2025-05-01
申请号：US19009379
申请日：2025-01-03
Applicant: DENSO CORPORATION
Inventor： Nobuhiko MATSUDA , Hidenori ECHIZEN , Hiroshi KATO , Shota KINOSHITA , Hironori TATSUMI
Abstract: An electrochemical cell is configured by laminating a working electrode, a counter electrode, a separator, a working electrode collector material and a counter electrode current collector. The working electrode adsorbs the gas to be recovered. The counter electrode transfers electrons to and from the working electrode. The separator is disposed between the working electrode and the counter electrode to prevent physical contact between the working electrode and the counter electrode to suppress electrical shorts from occurring. The working electrode current collector contacts the working electrode and electrically connects the working electrode to the counter electrode. The counter electrode current collector contacts the counter electrode and electrically connects the working electrode to the counter electrode. The counter electrode sealing member is disposed to cover the counter electrode and the counter electrode current collector with respect to the electrochemical cell to suppress contact between the mixed gas and the counter electrode.
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公开(公告)号：US20250121322A1
公开(公告)日：2025-04-17
申请号：US18986902
申请日：2024-12-19
Applicant: DENSO CORPORATION
Inventor： Hiroaki UMEDA , Hironori TATSUMI , Yoshiki MORIOKA
Abstract: A carbon dioxide recovery system is for separating CO2 from a CO2 containing gas that contains CO2 through electrochemical reactions and includes an electrochemical cell in which a working electrode including a CO2 adsorbent and a counter electrode are disposed to sandwich an electrolyte. The CO2 adsorbent is configured to absorb CO2 in response to electrons being supplied from the counter electrode to the working electrode due to a voltage applied between the working electrode and the counter electrode. The electrolyte is made of a material that satisfies at least one of requirements that a dissolved oxygen concentration is 0.2 cm3/cm3 or less and an oxygen diffusion coefficient is 5×10−7 cm−2/s or less.
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Patent Agency Ranking
公开(公告)号：US20230381714A1
公开(公告)日：2023-11-30
申请号：US18308716
申请日：2023-04-28
Applicant: DENSO CORPORATION
Inventor： Shota KINOSHITA , Hironori TATSUMI , Nobuhiko MATSUDA
IPC: B01D53/32
CPC classification number: B01D53/326 , B01D2257/504 , B01D2256/22
Abstract: A gas recovery system includes: a working electrode that adsorbs a recovery target gas; a counter electrode that exchanges electrons with the working electrode; a working-electrode current collector in contact with the working electrode to electrically connect the working electrode and the counter electrode; and a counter-electrode current collector in contact with the counter electrode to electrically connect the working electrode and the counter electrode. The working-electrode current collector has a working electrode opening to expose the working electrode to the gas mixture. The counter-electrode current collector has a counter electrode opening to expose the counter electrode to the gas mixture. An opening area of the counter electrode opening is smaller than an opening area of the working electrode opening.
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公开(公告)号：US20240149215A1
公开(公告)日：2024-05-09
申请号：US18403494
申请日：2024-01-03
Applicant: DENSO CORPORATION
Inventor： Eiichi HIROSE , Hironori TATSUMI , Hiroki TAKEZAKI
CPC classification number: B01D53/326 , B01D53/62 , C01B32/50 , B01D2257/504 , B01D2258/01 , B01D2258/06
Abstract: A carbon dioxide recovery system separates CO2 from a CO2 containing gas containing CO2 by an electrochemical reaction. The carbon dioxide recovery system includes an electrochemical cell having a working electrode and a counter electrode. The working electrode has a CO2 adsorbent that adsorbs CO2. When electrons are supplied from the counter electrode to the working electrode by applying a voltage between the working electrode and the counter electrode, the CO2 adsorbent combines with CO2 as the electrons are supplied. The working electrode has a working electrode conductive additive that forms a conductive path to the CO2 adsorbent. The working electrode conductive additive is a metal oxide having a structure in which an oxygen element is disposed around a metal element.
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8.发明公开公开(公告)号：US20230387425A1
公开(公告)日：2023-11-30
申请号：US18308708
申请日：2023-04-28
Applicant: DENSO CORPORATION
Inventor： Atsuhito OTA , Shota KINOSHITA , Hironori TATSUMI , Nobuhiko MATSUDA
CPC classification number: H01M6/02 , B01D53/326 , H01M4/0416 , H01M4/621 , B01D2313/345
Abstract: An electrochemical cell includes a working electrode and a counter electrode. A voltage is applied between the working electrode and the counter electrode such that electrons are supplied from the counter electrode to the working electrode so as to capture a target species. An electrode film of at least one of the working electrode and the counter electrode has an active material, a conductive aid and a binder. At least a part of the active material is contained as an agglomerate in the electrode film, and the maximum diameter of the aggregate is less than or equal to 10 μm.
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公开(公告)号：US20230383429A1
公开(公告)日：2023-11-30
申请号：US18321060
申请日：2023-05-22
Applicant: DENSO CORPORATION
Inventor： Hiroki TAKEZAKI , Hiroaki UMEDA , Hironori TATSUMI
CPC classification number: C25B15/085 , B01J2220/4812 , B01J20/3483 , B01J20/20
Abstract: A carbon dioxide recovery system includes an electrochemical cell. The electrochemical cell includes a working electrode, a counter electrode, and an electrolytic solution. The working electrode includes a CO2 adsorbent. The working electrode and the counter electrode are disposed to sandwich the electrolytic solution therebetween. The CO2 adsorbent is configured to absorb CO2 in response to a voltage being applied between the working electrode and the counter electrode and electrons being supplied from the counter electrode to the working electrode. The CO2 adsorbent is a porous body having pores, and a pore diameter of the pores is larger than an ion diameter of the electrolytic solution.
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公开(公告)号：US20230381711A1
公开(公告)日：2023-11-30
申请号：US18308724
申请日：2023-04-28
Applicant: DENSO CORPORATION
Inventor： Shota KINOSHITA , Shigehiko SUGIURA , Atsuhito OTA , Hironori TATSUMI , Nobuhiko MATSUDA
IPC: B01D53/04
CPC classification number: B01D53/0446 , B01D2257/504
Abstract: A gas recovery system configured to recover a recovery target gas from a gas mixture includes electrochemical cells and a gas passage between the electrochemical cells. The electrochemical cell has a working electrode including an adsorbent, and a counter electrode configured to exchange electrons with the working electrode. 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 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 regions.
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