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Naslov:Electrolysis energy efficiency of highly concentrated FeCl[sub]2 solutions for power-to-solid energy storage technology
Avtorji:Luin, Uroš (Avtor)
Valant, Matjaž (Avtor)
Datoteke:.pdf s10008-022-05132-y.pdf (1,99 MB)
 
.pdf RAZ_Luin_Uros_i2022.pdf (2,01 MB)
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano ()
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:An electrochemical cycle for the grid energy storage in the redox potential of Fe involves the electrolysis of a highly concentrated aqueous FeCl2 solution yielding solid iron deposits. For the high overall energy efficiency of the cycle, it is crucial to maximize the energy efficiency of the electrolysis process. Here we present a study of the influence of electrolysis parameters on the energy efficiency of such electrolysis, performed in an industrial-type electrolyzer. We studied the conductivity of the FeCl2 solution as a function of concentration and temperature and correlated it with the electrolysis energy efficiency. The deviation from the correlation indicated an important contribution from the conductivity of the ion-exchange membrane. Another important studied parameter was the applied current density. We quantitatively showed how the contribution of the resistance polarization increases with the current density, causing a decrease in overall energy efficiency. The highest energy efficiency of 89 ± 3% was achieved using 2.5 mol L−1 FeCl2 solution at 70 °C and a current density of 0.1 kA m−2. In terms of the energy input per Fe mass, this means 1.88 Wh g−1. The limiting energy input per mass of the Fe deposit was found to be 1.76 Wh g−1.
Ključne besede:electrolysis, ferrous chloride, iron deposition, energy efficiency
Leto izida:2022
Št. strani:str. 1-10
Številčenje:iss. , Vol.
COBISS_ID:97710851 Povezava se odpre v novem oknu
UDK:620.1/.2
ISSN pri članku:1432-8488
URN:URN:SI:UNG:REP:MMKUVEZ5
DOI:10.1007/s10008-022-05132-y Povezava se odpre v novem oknu
Licenca:CC BY-NC-ND 4.0
To delo je dosegljivo pod licenco Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
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Gradivo je del revije

Naslov:Journal of solid state electrochemistry
Skrajšan naslov:J. Solid State Electrochem.
Založnik:Springer
ISSN:1432-8488
COBISS.SI-ID:1497882 Novo okno

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