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Wearable heater composites comprising traditional Hanji cellulose fibers coated with graphene,silver nanowires,and PEDOT:PSS via scalable supersonic spraying

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Journal of Materials Science & Technology 2023年第33期164卷 27-36页

作者： Woojin Lim Ashwin Khadka Byeong-Yeop Kim Chanwoo Park Ali Aldalbahi govindasami periyasami Bhavana Joshi Sam S.Yoon School of Mechanical Engineering Korea UniversitySeoul 136-713Republic of Korea Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia

Traditional Korean Hanji paper and cotton fabric were introduced as flexible substrates in the fabrication of graphene-coated *** nanowires and PEDOT:PSS were added to increase the electrical conductivity of the heaters,thereby enhancing their heating *** optimal concentrations of silver nanowires and PEDOT:PSS with respect to that of graphene were *** active materials were deposited on flexible Hanji/cotton and non-flexible alumina substrates using supersonic *** proposed Hanji-and cotton-based heaters were light,wearable,stretchable,skin-friendly,and *** unyielding alumina-based heater exhibited the highest heating temperature of 275°C at 13 *** heater bendability and stretchability were tested considering multiple bending and stretching ***,water boiling and fabric drying were successfully performed using the alumina-based *** supersonic spraying deposition technique was used to produce writable and patternable heaters.

关键词： Graphene Silver nanowires PEDOT:PSS Supersonic spraying Hanji Wearable heater

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Bimetallic zeolitic imidazolate framework-derived substrate-free anode with superior cyclability for high-capacity lithium-ion batteries

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Journal of Materials Science & Technology 2021年第8期67卷 116-126页

作者： Bhavana Joshi Edmund Samuel Yong-il Kim govindasami periyasami Mostafizur Rahaman Sam S.Yoon School of Mechanical Engineering Korea UniversitySeoul136-713Republic of Korea Department of Physics NES Science CollegeSwami Ramanand Teerth Marathwada UniversityLatur RoadNandedMaharashtra431606India Department of Chemistry College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Freestanding carbon nanofibers loaded with bimetallic hollow nanocage structures were *** nanocages inherited the rhombic dodecahedral morphology of the zeolitic imidazolate framework(ZIF)precursors,ZIF-8 and *** anode materials for lithium-ion batteries(LIBs),the bimetallic nanocage-loaded freestanding carbon nanofibers effectively buffered volume expansions and alleviated pulverization through their different reduction and oxidation *** higher capacities of the composite anodes arose via the formation of the Li_(x)Zn alloy and Li_(2)O by Zn and Co ions,respectively,and the enhanced conductivity conferred by the carbon nanofibers.A synergistic effect of the composite components toward the strong electrochemical performance(688 m A h·g^(-1)at 1200 m A·g^(-1))of the bimetallic nanocage-loaded fibers was demonstrated through the superior long-term stability of the anode(1048 m A h·g^(-1)after 300 cycles at 100 m A·g^(-1)),suggesting that the fabricated anode can be a promising material for use in portable LIBs.

关键词： Carbon nanofiber Nanostructure Composite anode Zeolitic imidazolate framework

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