Journal ArticleDOI
Wearable High-Performance Supercapacitors Based on Silver-Sputtered Textiles with FeCo2S4–NiCo2S4 Composite Nanotube-Built Multitripod Architectures as Advanced Flexible Electrodes
TLDR
In this article, a novel flexible electrode with nanotube-built multitripod architectures of ternary metal sulfides' composites (FeCo2S4−NiCo 2S4) on a silver-sputtered textile cloth is presented.Abstract:
To achieve high-performance wearable supercapacitors (SCs), a new class of flexible electrodes with favorable architectures allowing large porosity, high conductivity, and good mechanical stability is strongly needed. Here, this study reports the rational design and fabrication of a novel flexible electrode with nanotube-built multitripod architectures of ternary metal sulfides' composites (FeCo2S4–NiCo2S4) on a silver-sputtered textile cloth. Silver sputtering is applicable to almost all kinds of textiles, and S2− concentration is optimized during sulfidation process to achieve such architectures and also a complete sulfidation assuring high conductivity. New insights into concentration-dependent sulfidation mechanism are proposed. The additive-free FeCo2S4–NiCo2S4 electrode shows a high specific capacitance of 1519 F g−1 at 5 mA cm−2 and superior rate capability (85.1% capacitance retention at 40 mA cm−2). All-solid-state SCs employing these advanced electrodes deliver high energy density of 46 W h kg−1 at 1070 W kg−1 as well as achieve remarkable cycling stability retaining 92% of initial capacitance after 3000 cycles at 10 mA cm−2, and outstanding reliability with no capacitance degradation under large twisting. These are attributed to the components' synergy assuring rich redox reactions, high conductivity as well as highly porous but robust architectures. An almost linear increase in capacitance with devices' area indicates possibility to meet various energy output requirements. This work provides a general, low-cost route to wearable power sources.read more
Citations
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Journal ArticleDOI
Towards flexible solid-state supercapacitors for smart and wearable electronics
TL;DR: The state-of-the-art advancements in FSSCs are reviewed to provide new insights on mechanisms, emerging electrode materials, flexible gel electrolytes and novel cell designs.
Journal ArticleDOI
Bio-Integrated Wearable Systems: A Comprehensive Review
Tyler R. Ray,Jungil Choi,Amay J. Bandodkar,Siddharth Krishnan,Philipp Gutruf,Limei Tian,Roozbeh Ghaffari,John A. Rogers +7 more
TL;DR: This review summarizes the latest advances in this emerging field of "bio-integrated" technologies in a comprehensive manner that connects fundamental developments in chemistry, material science, and engineering with sensing technologies that have the potential for widespread deployment and societal benefit in human health care.
Journal ArticleDOI
Towards establishing standard performance metrics for batteries, supercapacitors and beyond.
Abolhassan Noori,Maher F. El-Kady,Mohammad S. Rahmanifar,Richard B. Kaner,Mir Fazlollah Mousavi +4 more
TL;DR: An overview of the energy storage devices from conventional capacitors to supercapacitors to hybrid systems and ultimately to batteries is provided, although the focus is kept on capacitive and hybrid energy storage systems.
Journal ArticleDOI
Mixed Metal Sulfides for Electrochemical Energy Storage and Conversion
Xin-Yao Yu,Xiong Wen David Lou +1 more
TL;DR: Mixed metal sulfides (MMS) have attracted increased attention as promising electrode materials for electrochemical energy storage and conversion systems including lithium-ion batteries (LIBs), SIBs, hybrid supercapacitors (HSCs), metal-air batteries (MABs), and water splitting as discussed by the authors.
Journal Article
Fabrication of symmetric supercapacitors based on MOF-derived nanoporous carbons
Rahul R. Salunkhe,Yuichiro Kamachi,Nagy L. Torad,Soo Min Hwang,Ziqi Sun,Shi Xue Dou,Jung Ho Kim,Yusuke Yamauchi +7 more
TL;DR: In this paper, a symmetric supercapacitor based on Nanoporous Carbon (NPC) was designed by direct carbonization of Zn-based metal-organic frameworks (MOFs) without using an additional precursor.
References
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Journal ArticleDOI
Worm-like amorphous MnO2 nanowires grown on textiles for high-performance flexible supercapacitors
Peihua Yang,Yuzhi Li,Ziyin Lin,Yong Ding,Song Yue,Ching-Ping Wong,Xiang Cai,Shaozao Tan,Wenjie Mai,Wenjie Mai +9 more
TL;DR: In this article, a worm-like (WL) nanostructure was proposed for amorphous MnO2 nanowires with a possible formation mechanism and the specific capacitance was 2-3 times larger than that of its crystalline cotton-like NMO2 counterpart.
Journal ArticleDOI
FeCo2O4 submicron-tube arrays grown on Ni foam as high rate-capability and cycling-stability electrodes allowing superior energy and power densities with symmetric supercapacitors
TL;DR: Template-free chemical growth on Ni foam and thermal treatment results in homogeneous FeCo 2O4 submicron-tube arrays which serve as binder-free electrodes with high capacitance, rate-capability and cycling-stability owing to FeCo2O4 conductivity, high porosity, and strong bonding between tubes and Ni foam.
Journal ArticleDOI
B4C-nanowires/carbon-microfiber hybrid structures and composites from cotton T-shirts.
TL;DR: This work investigates new concepts for nano-reinforcement dispersion and new synthesis techniques that enable low-cost, high-throughput manufacturing of nanocomposites, including nanowires and nanorods.
Journal ArticleDOI
Hierarchically MnO2–Nanosheet Covered Submicrometer-FeCo2O4-Tube Forest as Binder-Free Electrodes for High Energy Density All-Solid-State Supercapacitors
TL;DR: The synthesis of hierarchically porous, nanosheet covered submicrometer tube forests on Ni foam is reported, which achieves superior rate capability, and remarkable cycling stability with 94% capacitance retention being stable after 1500 cycles.
Journal ArticleDOI
Cotton textile enabled, all-solid-state flexible supercapacitors
TL;DR: In this paper, a hierarchical NiCo2O4@NiCo 2O4/ACT core/shell nanostructure was grown on flexible cotton activated carbon textiles (ACTs) to fabricate NiCo 2 o4@niCo2 o4/act electrodes, which exhibited an exceptional combination of electrochemical and mechanical properties.