{"id":16609,"date":"2020-05-12T09:00:00","date_gmt":"2020-05-12T08:00:00","guid":{"rendered":"https:\/\/www.engineernewsnetwork.com\/blog\/?p=16609"},"modified":"2020-05-11T09:39:17","modified_gmt":"2020-05-11T08:39:17","slug":"working-up-a-sweat-could-power-future-wearable-devices","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/working-up-a-sweat-could-power-future-wearable-devices\/","title":{"rendered":"Working up a sweat could power future wearable devices"},"content":{"rendered":"\n

A new generation of wearable devices could be powered by human sweat instead of conventional, environmentally-unfriendly batteries, scientists say<\/strong><\/p>\n\n\n\n

In a new paper published in the journal Advanced Materials, engineers from the Bendable Electronics and Sensing Technologies (BEST) group at the University of Glasgow describe how working up a sweat could be enough to generate power for exercise monitors and other electronic devices in the future.<\/p>\n\n\n\n

They have developed a new type of flexible supercapacitor which replaces the electrolytes found in conventional batteries with sweat. It can be fully charged with as little as 20 microlitres of fluid and is robust enough to survive 4,000 cycles of the types of flexes and bends it might encounter in real-world use.<\/p>\n\n\n\n

It works by coating polyester cellulose cloth in a thin layer of a polymer known as poly(3,4-ethylenedioxythiophene) polystyrene sulfonate \u2013 or PEDOT:PSS. <\/p>\n\n\n\n

The team chose the polyester cellulose cloth because it is particularly absorbent, and PEDOT:PSS because it offers a useful combination of flexibility, high conductivity and environmental friendliness. The PEDOT:PSS acts as the supercapacitor\u2019s electrode.<\/p>\n\n\n\n

As the cloth absorbs its wearer\u2019s sweat, the positive and negative ions in the sweat interact with the polymer\u2019s surface, creating an electrochemical reaction which generates energy.<\/p>\n\n\n\n

The researchers tested the effectiveness of their tech by having volunteers run outdoors and on a treadmill while wearing a 2cm x 2cm cell version of the device. <\/p>\n\n\n\n

The runner sweated enough to allow the device to generate about 10 milliwatts of power \u2013 about enough to power a small bank of LEDs \u2013 which kept it going until the runner stopped.<\/p>\n\n\n\n

The research was led by Professor Ravinder Dahiya, head of the BEST group, based at the University of Glasgow\u2019s James Watt School, of Engineering.<\/p>\n\n\n\n

Prof Dahiya said: \u201cConventional batteries are cheaper and more plentiful than ever before, but they are often built using unsustainable materials which are harmful to the environment. That makes them challenging to dispose of safely, and potentially harmful in wearable devices, where a broken battery could spill toxic fluids onto skin.<\/p>\n\n\n\n

\u201cWhat we\u2019ve been able to do for the first time is show that human sweat provides a real opportunity to do away with those toxic materials entirely, with excellent charging and discharging performance. <\/p>\n\n\n\n

\u201cAs wearable devices like health monitors continue to increase in popularity, it opens up the possibility of a safer, more environmentally-friendly method of generating sustainable power \u2013 not just for wearables but possibly also for emerging areas such as e-bikes and electric vehicles, where sweat equivalent solution could replace the human sweat.\u201d<\/p>\n\n\n\n

Professor Dahiya and his team have developed a number of novel bendable technologies, including solar-powered \u2018electronic skin\u2019 which could be used in prosthetics and robotics. They are planning future research on the possibility of integrating sweat power into these devices. <\/p>\n\n\n\n

The BEST group\u2019s Dr Libu Manjakkal ,who contributed to the paper, said, \u201cIt\u2019s an exciting development, and we\u2019re keen to continue exploring the possibilities that sweat power provides for the future of wearable electronics.\u201d<\/p>\n\n\n\n

The team\u2019s paper, titled Wearable Supercapacitor based on Conductive PEDOT: PSS Coated Cloth and Sweat Electrolyt<\/em>e, is published in Advanced Materials<\/em>. The research was funded by the Engineering and Physical Sciences Research Council (EPSRC) and the Royal Society.<\/p>\n","protected":false},"excerpt":{"rendered":"

A new generation of wearable devices could be powered by human sweat instead of conventional, environmentally-unfriendly batteries, scientists say In a new paper published in the journal Advanced Materials, engineers from the Bendable Electronics and Sensing Technologies (BEST) group at the University of Glasgow describe how working up a sweat could be enough to generate …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[104,199],"tags":[],"class_list":["post-16609","post","type-post","status-publish","format-standard","","category-electronics","category-news-views-and-opinion"],"yoast_head":"\nWorking up a sweat could power future wearable devices - Engineer News Network<\/title>\n<meta name=\"description\" content=\"A new generation of wearable devices could be powered by human sweat instead of conventional, environmentally-unfriendly batteries, scientists say\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engineernewsnetwork.com\/blog\/working-up-a-sweat-could-power-future-wearable-devices\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Working up a sweat could power future wearable devices - 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