The New York Binghamton University team has recently developed a new bio-battery, this time based on textiles that can be stretched arbitrarily, while the electric drive comes from the act of bacteria exchanging electrons between molecules. Your saliva and sweat are the bacteria that generate electricity. The source of nutrition.
A year ago, the team led by Seokheun Choi, an assistant professor of electronics and information engineering at Binghamton University, has introduced a paper bio-cell that can be folded multiple times without affecting power generation, and the battery power will be collapsed. Change in degree.
Recently, the team released an updated "textile bio-cell" after its improvement. It also has stable power generation capability in repeated stretching and torsion tests. A biofuel cell (biological fuel cell) is a bio-electrochemical-based battery system that uses natural bacteria and the interaction of artificial bacteria on fabrics to generate current-initiated chemical reactions. Simply put, bacteria are used to trigger a reduction/oxidation reaction so that electrons are exchanged between molecules to generate electricity.
Previously, Seokheun Choi had used filthy water and saliva to test the power generation capacity of bacteria. However, the use of bio-batteries in wearable electronic products is very underdeveloped because bacteria may cause health problems.
But Seokheun Choi believes that there are more bacteria in the human body than cells. If it is not wasted as a resource, his latest intention is to target the body's natural secretions: sweat, one of which is called "Pseudomonas aeruginosa." "Pseudomonas aeruginosa" bacteria act as biocatalysts, resulting in a device with a maximum power output of 6.4 μW/cm2 and a current density of 52 μA/cm2, similar to other flexible paper microbial fuel cells.
New Atlas reported that all battery components were integrated into a single piece of fabric with no barrier between the anode and cathode. The anode compartment is designed to be hydrophilic to conduct electricity, and electricity can be obtained from bacteria in sweat. Cathodes use silver oxide and redox reactions as solid materials for textile electronics.
Compared with conventional batteries or other enzymatic fuel cells, microbial fuel cells can be the best power source for wearable electronics, because the constant secretion of sweat is a potential fuel to support bacterial vitality, provide stable enzymatic reactions, and allow microbial fuel cells to Long-term operation, that is to say, your clothes or socks in the future can draw on your sweat while powering wearable devices and monitor related exercise results at any time.
This paper was published in the "Advanced Energy Materials" journal.
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