In a study completed at Northwestern University in Illinois and published today in Nature Energy, Dr Dong Jun Kim – now of UNSW’s School of Chemistry – led a team of researchers including Nobel Laureate Sir Fraser Stoddart to demonstrate a strategy for designing active materials for rechargeable aluminium batteries.
Up until now, finding appropriate host electrodes for insertion of complex aluminium ions had been a fundamental challenge.
“We believe the research discussed in the article opens up a new approach to designing aluminium-ion batteries that could be of interest to scientists investigating next-generation electrochemical energy storage,” Dr Kim added.
What makes this is a big deal is that while lithium-ion batteries have enjoyed remarkable success powering mobile electronic devices, in renewable energy applications they are fraught by limited cycle life, safety concerns and relatively high costs.
Aluminium-ion batteries, on the other hand, have been seen as ideal contenders for this space, given aluminium is the third most abundant element in the Earth’s crust behind oxygen and silicon. It also has the one of the highest theoretical volumetric capacities on account of its multiple redox states.
“Developing batteries using aluminium has received a lot of expectation for delivering high energy to price ratios,” Dr Kim said.
“Our results showed promising battery performances, however, it is early days and we stress that there is need to improve even more in every aspect. So it does not make much sense to compare against the well-established lithium-ion battery system.”
Dr Kim said he will be continuing to research aluminium-ion batteries while examining the potential of using other elements.
Source : UNSW