Batteries that usually power implantable devices such as pacemakers eventually run out of chemical reactants, requiring a surgery to replace them — a health hazard to cardiac patients.
Now, a research team from Egypt and the United States has reportedly overcome this drawback by inventing ultrathin, biocompatible supercapacitors that can be used to make efficient and long-lasting batteries for implantable devices1.
“Besides pacemakers, the supercapacitors could be used to safely power a broad spectrum of implantable biomedical devices such as deep brain stimulators, biosensors and various other electronic devices,” says the study’s lead author Islam M. Mosa of Tanta University, Egypt.
The scientists prepared the supercapacitors using graphene, a muscle protein and biofluids as electrolytes. Batteries made using such supercapacitors can power pacemakers for a long time by utilizing protein and biofluids available in the body.
The supercapacitors, thinner than a human hair, can generate high power density. Unlike pure graphene which is potentially toxic to human cells, the graphene-protein hybrid material used in the supercapacitors showed no toxic effects on specific cultured cells.
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Source: Nature Middle East