New Flexible Biofuel Cells Come Out! Using Sweat To Generate Electricity To Continuously Illuminate The LED

- Nov 06, 2019-

Technology Daily, New York, September 25th, the US-European international research team has recently developed a unique flexible stretchable device that can be applied to the skin to change the LED (organic) by changing the compounds in the sweat to generate electricity. Light-emitting diodes) are called biofuel cells. This research opens up new avenues for the development of wearable electronic devices powered by autonomous and environmentally friendly bio-batteries. Related papers were published on the 25th Advanced Functional Materials.

The potential use of wearable electronic devices is increasing, especially in medical and sports monitoring. This type of equipment requires the development of a reliable, efficient source that can be easily integrated into the human body. The use of "biofuels" found in human organic fluids has long been a promising direction.

A joint research team at the University of California, San Diego and the University of Grenoble Alp, France, has developed a flexible conductive material consisting of carbon nanotubes, cross-linked polymers and enzymes that are connected by stretchable connectors and passed through the wire. Screen printing is printed directly on the material.

Following skin deformation, biofuel cells generate electrical energy by reducing the oxidation of lactic acid present in oxygen and sweat. Once applied to the arm, it uses the booster to continuously power the LED. The production of the fuel cell is relatively simple and inexpensive, and the main cost is the production of an enzyme that converts compounds in sweat. Researchers are now looking to amplify the voltage provided by biofuel cells to power larger portable devices.

As the most special member of the energy family, biofuel cells can be said to be a true green battery. It uses organic matter as a fuel and directly or indirectly utilizes an enzyme as a catalyst, and the energy conversion rate is theoretically quite high. However, at this stage, the inactive part of the biological cell membrane or the enzyme protein causes great resistance to electron transfer, which in turn affects the efficiency of the entire battery. Therefore, in order to develop a biofuel cell that can really come in handy, it is necessary to overcome this difficult problem.