Supercapacitors challenge batteries: powerful graphene hybrid material for highly efficient energy storage
Some researchers have developed a novel, powerful as well as sustainable graphene hybrid material for supercapacitors. It serves as the positive electrode in the energy storage device. The researchers are combining it with a proven negative electrode based on titan and carbon. The new energy storage device does not only attain an energy density of up to 73 Wh/kg, which is roughly equivalent to the energy density of a nickel-metal hydride battery, but also performs much better than most other supercapacitors at a power density of 16 kW/kg.
The researchers are betting on a new strategy to overcome the performance limits of standard materials – they utilize hybrid materials. The abstract idea of combining basic materials was transferred to supercapacitors by the research team. As a basis, they used the novel positive electrode of the storage unit with chemically modified graphene and combined it with a nanostructured metal-organic framework, a so-called MOF.
New understanding of ionic interactions with graphene and water could improve water purification processes and electric energy storage
New findings have been uncovered about the role of ionic interaction within graphene and water. The insights could inform the design of new energy-efficient electrodes for batteries or provide the backbone ionic materials for neuromorphic computing applications.
This story is from the January - March 2021 edition of Energy Future.
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This story is from the January - March 2021 edition of Energy Future.
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