US 12,509,782 B2 · Co-electrolysis cell design for efficient CO2 reduction from gas phase at low temperature

Abstract

A membrane electrode assembly for an electrochemical cell, in particular a co-electrolysis cell for CO2 reduction reaction, can overcome the problem of parasitic CO2 pumping from cathode to anode side and, at the same time, maintain good Faradaic efficiency towards CO2 reduction reaction in a co-electrolysis system where pure or diluted gaseous CO2 is used. The assembly includes an MEA, having an anode, a cathode, a polymer ion exchange membrane between cathode and anode, an additional ion exchange polymer film between the cathode and the polymer ion exchange membrane and a discontinuous interface formed between the additional polymer film located at the cathode side and the ion exchange membrane.

Claims5

Dependent claims

An electrochemical co-electrolysis cell for the reduction of carbon dioxide, comprising a membrane electrode assembly (MEA), said MEA comprising:

an anode electrode substrate,
a cathode electrode substrate, and
an acidic cation exchange polymer membrane disposed between the anode electrode substrate and the cathode electrode substrate,
wherein the cathode electrode substrate comprises a mixture of a cathode catalyst material and an anion exchange ionomer and a continuous film layer of the anion exchange ionomer disposed on one side of the cathode electrode substrate,
wherein the anion exchange ionomer film layer on the cathode electrode substrate assumes the porosity of the cathode electrode substrate upon which it is deposited to form a discontinuous contact interface with the cation exchange polymer membrane and to separate the cathode catalyst material from the cation exchange polymer membrane.

2 more elements

Dependencies are inferred from the claim text.

Co-electrolysis cell design for efficient CO2 reduction from gas phase at low temperature

Life of this patent

Co-electrolysis cell design for efficient CO2 reduction from gas phase at low temperature

Life of this patent

Abstract

Claims5