Energy harvesting smart fabrics are one step closer thanks to lasers

  Last updated October 25, 2019 at 3:20 pm

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The next generation of waterproof smart fabrics will be laser printed and made in minutes.


The waterproof smart fabric, embedded with energy storage devices. Credit: RMIT


Australian scientists have developed a cost-efficient and scaleable method for rapidly fabricating textiles that are embedded with energy storage devices.


In just three minutes, the method developed by researchers at RMIT can produce a 10x10cm smart textile patch that’s waterproof, stretchable and readily integrated with energy harvesting technologies.


The technology enables graphene supercapacitors – powerful and long-lasting energy storage devices that are easily combined with solar or other sources of power – to be laser printed directly onto textiles.


Smart fabrics have diverse applications


In a proof-of-concept, the researchers connected the supercapacitor with a solar cell, delivering an efficient, washable and self-powering smart fabric that overcomes the key drawbacks of existing e-textile energy storage technologies.


RMIT researcher Dr Litty Thekkakara with the e-textile. Credit: RMIT


The growing smart fabrics industry has diverse applications in wearable devices for the consumer, health care and defence sectors – from monitoring vital signs of patients, to tracking the location and health status of soldiers in the field, and monitoring pilots or drivers for fatigue.


Litty Thekkakara, a researcher in RMIT’s School of Science, says smart textiles with built-in sensing, wireless communication or health monitoring technology called for robust and reliable energy solutions.


“Current approaches to smart textile energy storage, like stitching batteries into garments or using e-fibres, can be cumbersome and heavy, and can also have capacity issues,” Thekkakara says.


“These electronic components can also suffer short-circuits and mechanical failure when they come into contact with sweat or with moisture from the environment.


New technology is fully washable


“Our graphene-based supercapacitor is not only fully washable, it can store the energy needed to power an intelligent garment – and it can be made in minutes at large scale.


“By solving the energy storage-related challenges of e-textiles, we hope to power the next generation of wearable technology and intelligent clothing.” The research analysed the performance of the proof-of-concept smart textile across a range of mechanical, temperature and washability tests and found it remained stable and efficient,” she says.


Min Gu from the University of Shanghai for Science and Technology, says the technology could enable real-time storage of renewable energies for e-textiles.


“It also opens the possibility for faster roll-to-roll fabrication, with the use of advanced laser printing based on multifocal fabrication and machine learning techniques.”


The research is published in Scientific Reports.


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Energy harvesting smart fabrics are one step closer thanks to lasers




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