Izvorni znanstveni članak
https://doi.org/10.5599/jese.2075
Primary aluminum-air flow battery for high-power applications: Optimization of power and self-discharge
Dayatri Bolaños-Picado
; Departamento de Ingeniería Química, 11501 2060, Sabanilla de Montes de Oca, San José, Costa Rica
Cindy Torres
; Departamento de Ingeniería Química, 11501 2060, Sabanilla de Montes de Oca, San José, Costa Rica
Diego González-Flores
; Centro de Electroquímica y Energía Química (CELEQ), Universidad de Costa Rica, 11501 2060, Sabanilla de Montes de Oca, San José, Costa Rica
Sažetak
Aluminum-air batteries are a front-runner technology in applications requiring a primary energy source. Aluminum-air flow batteries have many advantages, such as high energy density, low price, and recyclability. One of the main challenges with aluminum-air batteries is achieving high power while parasitic corrosion and self-discharge are minimized. In this study, the optimization of an aluminum-air flow cell by multiple-parameters analysis and integration of a four-cell stack are shown. We also studied the incorporation of ammonium metavanadate (NH4VO3) as anticorrosive in 4 mol L-1 KOH electrolyte by discharge and polarization plots. It was concluded that NH4VO3 is an efficient anticorrosive at low currents, but it limits the battery reaction at high-current and high-power applications. Nevertheless, high currents inhibit the corrosion reaction using 4 mol L-1 KOH electrolyte, allowing high power and capacity without anticorrosive additives. The flow in the stack also plays a significant role, and parallel flow is suggested over cascade flow since the latter results in the progressive accumulation of hydrogen as the electrolyte flows through the stack.
Ključne riječi
Ammonium metavanadate; aluminum alloys; conversion coatings; forced flow; primary power source; backup battery
Hrčak ID:
311009
URI
Datum izdavanja:
7.12.2023.
Posjeta: 169 *