Modeling of Parasitic Hydrogen Evolution Effects in an Aluminum−Air Cell

Abstract

The aluminum-air battery has potential to serve as a near-term power source for electric vehicles. Parasitic hydrogen evolution caused by anode corrosion during the discharge process, however, has long been recognized as an obstacle to further commercialization of the aluminum-air battery. This paper focuses on the parasitic reaction impacts with an aim of better understanding and managing the parasitic reaction. On the basis of a mathematical model, effects of the parasitic hydrogen evolution on cell flow field, ionic mass transfer and current density are investigated. Besides, the possibility of utilizing the parasitically evolved hydrogen to increase the total power output is evaluated.

Paper-based microfluidic aluminum–air batteries: toward next-generation miniaturized power supply

“…Lower discharge current along with longer discharge time could have led to severer parasitic Al corrosion, which results in lower overall specific capacity of the battery. 5,62 A different picture emerges for the non-fluidic Al-air battery: voltage drops quickly regardless of the discharge current densities (Fig. S6b †); this result is in line with the rapid degradation of the non-fluidic Al-air battery during polarization tests (Fig.…”

“…). 5,62 As shown in Fig. S7, † it takes 57 min for a piece of Al foil (8 × 5 mm 2 ) to be fully dissolved in 1.5 M KOH solution.…”

All‐day wearable health monitoring system

“…148 However, when a strong alkali is used as an electrolyte, Al self-corrosion and hydrogen generation are severe, adversely affecting practical applications. [149][150][151][152][153][154] Leung et al reported a paper-made Al-air battery that can reduce Al corrosion, make simpler battery systems, and reduce the capacity of electrolyte storage. 155 The battery structure was constructed using Al-metal foil as the anode material, filter paper as the electrolyte material, and carbon paper as the cathode material.…”

“…Among the aforementioned metallic materials, Al is considered a suitable anode material for MAB development due to its relatively low market price, large reserves, and high energy density (six times that of Zn 148 . However, when a strong alkali is used as an electrolyte, Al self‐corrosion and hydrogen generation are severe, adversely affecting practical applications 149–154 …”

Methane carbon dioxide reforming for hydrogen production in a compact reformer - a modeling study

“…Compared with experimental study, mathematical modeling is an economical and powerful tool to understand the fundamental processes in the reactor. After a mathematical model is validated, the performance of the reactor can be predicted easily by simply adjusting the simulation parameters (Hosseini et al 2011, Lebouvier et al 2011, Lim et al 2005, Wang et al 2010.…”