A new battery made of aluminium with double the energy density compared to other previous batteries made of the same material was produced by a research group from Chalmers University of Technology, Sweden, and the National Institute of Chemistry, Slovenia.
According to the same researchers, the use of aluminium for batteries alone offers several advantages, including high energy density, at least in theory, and the ability to recycle components. In addition, the same cost per device could be significantly lower than the cost of current lithium batteries.
These properties make aluminium batteries not only a forward-looking concept, but also objects that can be built over large areas, i.e. also in the commercial sector and can already be used today, for example in the photovoltaic or energy storage sector, wind power, as Patrik Johansson, one of the Chalmers researchers involved in this project, has indicated.
In conventional aluminium-based batteries, the latter is used as the anode, while graphite is used as the cathode. In the model developed by Johansson and colleagues, graphite is replaced by a nanostructured organic cathode.
The latter is produced from carbon-based anthraquinone molecules. This molecule enables the storage of the charge carriers by the electrolyte, the liquid space in which the ions move between the electrodes. It is precisely this feature that results in a density much greater than that of the battery itself.
The same researchers are now trying to use an electrolyte that can do its job even better because the current version uses chlorine, a material from which, like Niklas Lindahl, another researcher involved in studies wants to remove the same researchers.
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