COTTON BASED BIO-FUEL CELL TO POWER PACEMAKERS
Scientist has developed a glucose-powered bio-fuel cell that uses electrodes made from cotton fiber that can help to power implantable medical devices like sensors and pacemakers etc.
This fuel cell provide twice power as compare to other bio-fuel cells and could be paired with batteries or super-capacitors to provide hybrid power source for the medical devices, Said researchers from the Georgia Institute of Technology(US). Gold nano particles assembled on the cotton used by researcher to create high-conductive electrodes that helped to improve the fuel cell’s efficiency, that allowed them to address the performance of bio-fuel cells – connecting the enzyme used to oxidize glucose with an electrode.
A layer by layer assembly technique used to fabricate the gold electrodes, which provide both the electro catalytic cathode and conductive substrate for the anode, it boost the power capacity apx. 3.7 milliwatts per square centimeter.
“We could use this device as a continuous power source for converting chemical energy from glucose in the body to electrical energy,” said Seung Woo Lee, an ast prof at Georgia Tech.
“The layer-by-layer deposition technique precisely controls deposition of both the gold nano particle and enzyme, dramatically increasing the power density of this fuel cell, said Lee
“Cotton has many pores that can support activity in electro chemical devices. The cotton fiber is hydrophilic, an the electrolyte easily wets the surface, ” said Yongmin Ko, a visiting faculty member at Georgia Tech.
“WE have a record high power performance, and the lifetime should be improved for biomedical applications such as pacemakers,” Lee Said.