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Biofuel cells draw on sweat to power wearables

Their new biofuel cell array consists of a water-repellent paper substrate onto which multiple biofuel cells are laid out in series and in parallel; the number of cells depends on the output voltage and power required. In each cell, electrochemical reactions between lactate – a chemical found in sweat – and an enzyme present in the electrodes produce an electric current.
Unlike previous designs, the entire device can be fabricated via screen printing, a technique generally suitable for cost-effective mass production. Similarly, previous cells used silver wires as conducting paths, but the new biofuel cells employ porous carbon ink. Paper layers collect sweat and transport it to all cells simultaneously through the capillary effect. ....

Seiya Tsujimura , Tsutomu Mikawa , Isao Shitanda , Hiroyuki Matsui , Karolina Grabowska , Tokyo University Of Science , University Of Tsukuba , Yamagata University , Associate Professor Isao Shitanda , Tokyo University , Power Sources , ஹீரோயுக்கி மாட்சு , டோக்கியோ பல்கலைக்கழகம் ஆஃப் அறிவியல் , பல்கலைக்கழகம் ஆஃப் ட்சூகுபா , யமாகத பல்கலைக்கழகம் , டோக்கியோ பல்கலைக்கழகம் , பவர் ஆதாரங்கள் ,

No Batteries? No Sweat! Wearable Biofuel Cells Now Produce Electricity from Lactate

No Batteries? No Sweat! Wearable Biofuel Cells Now Produce Electricity from Lactate
Wearable electronic devices and biosensors are great tools for health monitoring, but it has been difficult to find convenient power sources for them. Now, a group of scientists from Japan has successfully developed and tested a wearable biofuel cell array that generates electric power from the lactate in the wearer s sweat, opening doors to electronic health monitoring powered by nothing but bodily fluids.
It cannot be denied that, over the past few decades, the miniaturization of electronic devices has taken huge strides. Today, after pocket-size smartphones that could put old desktop computers to shame and a plethora of options for wireless connectivity, there is a particular type of device whose development has been steadily advancing: wearable biosensors. These tiny devices are generally meant to be worn directly on th ....

Seiya Tsujimura , Tsutomu Mikawa , Isao Shitanda , Hiroyuki Matsui , Tokyo University Of Science , University Of Tsukuba , Yamagata University , Associate Professor Isao Shitanda , Tokyo University , Power Sources , ஹீரோயுக்கி மாட்சு , டோக்கியோ பல்கலைக்கழகம் ஆஃப் அறிவியல் , பல்கலைக்கழகம் ஆஃப் ட்சூகுபா , யமாகத பல்கலைக்கழகம் , டோக்கியோ பல்கலைக்கழகம் , பவர் ஆதாரங்கள் ,