Scalable Low-Temperature CO₂ Electrolysis: Current Status and Outlook

Area of Science:

• Electrochemistry
• Chemical Engineering
• Materials Science

Background:

• Electrochemical CO2 reduction (eCO2R) in membrane electrode assemblies (MEAs) offers advantages like reduced resistance and stackability for e-chemical production.
• Current eCO2R MEA performance falls short of economic feasibility thresholds, requiring lower cell voltages and longer stability (>5 years).
• Carbon capture and product separation processes, critical for e-chemical cost, are underdeveloped compared to CO2 electrolysis.

Purpose of the Study:

• To review the current state of eCO2R technologies in MEAs from academic and industrial perspectives.
• To identify the performance gaps hindering commercialization of e-chemical production.
• To propose future research directions for achieving industrially viable e-chemical manufacturing.

Main Methods:

• Literature review and analysis of existing eCO2R MEA technologies.
• Comparative assessment of academic research and industrial applications.
• Identification of key challenges in performance, stability, and integrated processes.

Main Results:

• eCO2R in MEAs has advanced but not yet met commercialization criteria for voltage and durability.
• Significant attention has been given to CO2 electrolysis, with less focus on essential upstream (capture) and downstream (separation) processes.
• A notable gap exists between current eCO2R capabilities and the demands of industrial-scale e-chemical production.

Conclusions:

• Further research is needed to enhance eCO2R performance and stability in MEAs.
• Integrating efficient carbon capture and product separation is vital for the economic feasibility of e-chemical production.
• Addressing these challenges will pave the way for industrially viable e-chemical manufacturing through eCO2R.