In the last 20 years, direct alcohol fuel cells (DAFCs) have been the subject of tremendous research efforts for the potential application as on-demand power sources. Two leading technologies respectively based on proton exchange membranes (PEMs) and anion exchange membranes (AEMs) have emerged: the first one operating in an acidic environment and conducting protons; the second one operating in alkaline electrolytes and conducting hydroxyl ions. In this review, we present an analysis of the state-of-the-art acidic and alkaline DAFCs fed with methanol and ethanol with the purpose to support a comparative analysis of acidic and alkaline systems, which is missing in the current literature. A special focus is placed on the effect of the reaction stoichiometry in acidic and alkaline systems. Particularly, we point out that, in alkaline systems, OH- participates stoichiometrically to reactions, and that alcohol oxidation products are anions. This aspect must be considered when designing the fuel and when making an energy evaluation from a whole system perspective.

Berretti E., Osmieri L., Baglio V., Miller H.A., Filippi J., Vizza F., et al. (2023). Direct Alcohol Fuel Cells: A Comparative Review of Acidic and Alkaline Systems. ELECTROCHEMICAL ENERGY REVIEWS, 6(1) [10.1007/s41918-023-00189-3].

Direct Alcohol Fuel Cells: A Comparative Review of Acidic and Alkaline Systems

Santamaria M.;
2023-12-01

Abstract

In the last 20 years, direct alcohol fuel cells (DAFCs) have been the subject of tremendous research efforts for the potential application as on-demand power sources. Two leading technologies respectively based on proton exchange membranes (PEMs) and anion exchange membranes (AEMs) have emerged: the first one operating in an acidic environment and conducting protons; the second one operating in alkaline electrolytes and conducting hydroxyl ions. In this review, we present an analysis of the state-of-the-art acidic and alkaline DAFCs fed with methanol and ethanol with the purpose to support a comparative analysis of acidic and alkaline systems, which is missing in the current literature. A special focus is placed on the effect of the reaction stoichiometry in acidic and alkaline systems. Particularly, we point out that, in alkaline systems, OH- participates stoichiometrically to reactions, and that alcohol oxidation products are anions. This aspect must be considered when designing the fuel and when making an energy evaluation from a whole system perspective.
dic-2023
Settore ING-IND/23 - Chimica Fisica Applicata
Berretti E., Osmieri L., Baglio V., Miller H.A., Filippi J., Vizza F., et al. (2023). Direct Alcohol Fuel Cells: A Comparative Review of Acidic and Alkaline Systems. ELECTROCHEMICAL ENERGY REVIEWS, 6(1) [10.1007/s41918-023-00189-3].
File in questo prodotto:
File Dimensione Formato  
s41918-023-00189-3.pdf

accesso aperto

Tipologia: Versione Editoriale
Dimensione 5.01 MB
Formato Adobe PDF
5.01 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/608433
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 12
social impact