Date(s) - 12/02/2021
15:30 - 16:30
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Aluminum Batteries: Sustainable Alternative to Lithium-Ion Systems
Dr. Giuseppe Antonio Elia
Helmholtz Institute Ulm / Karlsruhe Institute of Technology, Helmholtzstrasse 11, 89081 Ulm Germany
The transition to a sustainable energy economy requires an increase in the share of renewable
energy sources (RESs) . Renewable energy production is characterized by intermittent power
output and requires large scale applications to improve energy storage capability (currently, less than 1% of the electrical energy production can be stored). The development of low-cost and environmentally friendly electrochemical storage systems characterized by high performance is fundamental for a sustainable energy economy. The most mature modern battery technology is the lithium-ion battery (LIB), which is considered the most suitable battery for electromobility because of the high energy density of LIBs. However, long-term, large-scale application of LIBs appears to be problematic due to the natural scarcity and limited production capacity of key materials containing Co and Ni . Several other metallic anodic materials such as sodium, potassium, calcium, magnesium, and aluminum [3–5], characterized by a higher abundance of lithium, have been considered suitable candidates for electrochemical storage devices in the replacement of lithium systems. In particular, aluminum, the most abundant metallic element in the earth’s crust, is considered a promising candidate for application in stationary electrochemical storage systems. The lightweight of aluminum and its ability to exchange three electrons during the electrochemical process (Al3+ + 3e- ↔ Al) grant both a high gravimetric and volumetric capacity density of 2.98 Ah g-1 and 8.04 Ah cm-3, respectively, the latter value being four times as high compared to a lithium metallic anode. Additionally, the aluminum can be handled in open-air, leading to enormous advantages in cell fabrication and a drastic improvement of the safety level of electrochemical storage systems employing this electrode material. In our work, we propose the use of advanced cathode material for the application in aluminum batteries. Electrochemical tests have been performed employing 1-ethyl-3-methylimidazolium chloride (EMImCl) ionic liquid and AlCl3 in a molar ratio of EMImCl:AlCl3 1:1.5 as the electrolyte. [6–9]
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