 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| . |  |
. |
 by Staff Writers Ulsan, South Korea (SPX) Feb 13, 2018
The current development of stretchable battery materials that mimic the functions of nature has emerged as a highly interesting research area, necessary for the next wave of wearable electronics. A recent study, affiliated with UNIST has presented a bioinspired Jabuticaba-like hybrid carbon/polymer (HCP) composite that was developed into a stretchable current collector using a simple and cost-effective solution process. Using the HCP composite as a stretchable current collector, the research team has, for the first time, developed a highly stretchable rechargeable lithium-ion battery (ARLB) based on aqueous electrolytes. This breakthrough has been led by Professor Soojin Park in the School of Energy and Chemical Engineering in collaboration with Professor Kwanyong Seo and Professor So Youn Kim in the School of Energy and Chemical Engineering at UNIST. Stretchable electronic devices have recently attracted tremendous attention as next-generation devices due to their immense flexibility. The increasing interest and demand of flexible electronics has fueled the search for highly stretchable electrodes with high mechanical durability and high electrical conductivity during deformation. Although many methods have been proposed for these electrodes, none of them has managed to simultaneously achieve high stretchability for the electrodes and have a scalable manufacturing process. Professor Park solved such issues using a conductive polymer composite, composed of Jabuticaba-like hybrid carbon fillers containing carbon nanotubes and carbon black in a simple solution process. The shape of this structure resembled that of a Jabuticaba tree, the Brazilian grapetree. The research team observed that the HCP composite is found to effectively retain its electrical conductivity, even under high strain rates. This makes it suitable for use in highly stretchable aqueous Li-ion batteries. "Our findings are expected to expand the number of stretchable nanocomposites with electrochemical and mechanical properties available for use in a wide variety of applications,"says Professor Seo, who was in charge of the fabrication of stretchable current collectors. A detailed analysis of the percolation behaviors of the conductive filler within the composite was done using an in situ SAXS measurement under stretching, which revealed that the different types of carbon in the filler led to a formation of highly interconnected cosupporting networks. Professor So Youn Kim led the in situ SAXS experiments. SAXS is a highly useful technique for measuring the behavior of nanofillers in polymer matrices. Besides, the research team has, for the first time, developed stretchable ARLB as a stretchable power source, using the HCP composite as a stretchable current collector and they have delivered stable power to a LED even under 100% strain. "This study is expected to facilitate the design of stretchable nanocomposites with optimized electrochemical and mechanical properties for use in energy storage devices and stretchable electronics," says Professor Kim. Woo-Jin Song, et. al., "Jabuticaba-Inspired Hybrid Carbon Filler/Polymer Electrode for Use in Highly Stretchable Aqueous Li-Ion Batteries," Advanced Energy Materials, (2018).
A new approach to rechargeable batteries Boston MA (SPX) Feb 05, 2018 A type of battery first invented nearly five decades ago could catapult to the forefront of energy storage technologies, thanks to a new finding by researchers at MIT and other institutions. The battery, based on electrodes made of sodium and nickel chloride and using a new type of metal mesh membrane, could be used for grid-scale installations to make intermittent power sources such as wind and solar capable of delivering reliable baseload electricity. The findings are being reported in the journ ... read more
|
|||||||||||||
|
|
| The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us. |
del.icio.us
Digg
Reddit
Google
