Fabrication of Ultralong Hybrid Microfibers from Nanosheets of Reduced Graphene Oxide and Transition‐Metal Dichalcogenides and their Application as Supercapacitors

Sun, Gengzhi; Liu, Juqing; Zhang, Xiao; Wang, Xuewan; Li, Hai; Yu, Yang; Huang, Wei; Zhang, Hua; Chen, Peng

doi:10.1002/ange.201405325

Cited by 103 publications

(41 citation statements)

References 72 publications

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“…Recently, significant achievements have been made through the use of carbon‐based fibers that were prepared from carbon nanotube (CNT), reduced graphene oxide (RGO), and activated carbon as well as their composites with conducting polymers such as polyaniline, and poly(3,4‐ethylenedioxythiophene), and pseudocapacitive inorganic moieties . For instance, two CNT/polyaniline composite yarns were twisted into a supercapacitor with a specific capacitance of 38 mF cm −2 at 0.01 mA cm −2 ; two CNT/Co 3 O 4 composite yarns were also twisted to fabricate a fiber supercapacitor to display a specific capacitance of 52.6 mF cm −2 at 0.053 mA cm −2 ; polyelectrolyte‐wrapped graphene/CNT core‐sheath fibers had been made into supercapacitors with a specific capacitance of 177 mF cm −2 at 0.1 mA cm −2 …”

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confidence: 99%

A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode

et al. 2016

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confidence: 99%

A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode

et al. 2016

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“…These fiber‐based SCs are lightweight and thus provide high areal, volumetric, and gravimetric energy storage performance. Some of the fiber‐based SCs make use of active materials, like graphene and carbon nanotubes, transition metal oxides and dichalcogenides, conducting polymers, and many other types of two‐dimensional (2D) layered nanomaterials . They have reasonable degrees of flexibility, i.e., they can be repeatedly bent without significantly altering their energy storage performance .…”

Section: Introductionmentioning

confidence: 99%

“…Some of the fiber‐based SCs make use of active materials, like graphene and carbon nanotubes, transition metal oxides and dichalcogenides, conducting polymers, and many other types of two‐dimensional (2D) layered nanomaterials . They have reasonable degrees of flexibility, i.e., they can be repeatedly bent without significantly altering their energy storage performance . Some of these fiber‐based SCs have been hand‐woven in textile prototypes, albeit in short lengths, but sufficient to demonstrate textile integration .…”

Section: Introductionmentioning

confidence: 99%

Elastic Fiber Supercapacitors for Wearable Energy Storage

Qin

Seyedin

Zhang

et al. 2018

Macromol. Rapid Commun.

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The development of wearable devices such as smart watches, intelligent garments, and wearable health-monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber-based supercapacitors are emerging as a promising candidates for this purpose because they are lightweight, flexible, have high energy and power density, and the potential for easy integration into traditional textile processes. An important characteristic that is oftentimes ignored is stretchability-fiber supercapacitors should be able to accommodate large elongation during use, endure a range of bending motions, and then revert to its original form without compromising electrical and electrochemical performance. This article summarizes the current research progress on stretchable fiber-based supercapacitors and discusses the existing challenges on material preparation and fiber-based device fabrication. This article aims to help researchers in the field to better understand the challenges related to material design and fabrication approaches of fiber-based supercapacitors, and to provide insights and guidelines toward their wearability.

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“…One of the methods of fiber fabrication is wet spinning . However, with this technique there are complicated, dangerous, and uneconomical steps due to various treatment processes such as an additional reduction process and electrodeposition . In addition, the wet‐spun fiber supercapacitor has a critical problem of the low electrical conductivity of materials.…”

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confidence: 99%

“…Our MnO 2 /PtNP embedded wet‐spun supercapacitor can be produced in a simple and easy one‐step process compared with other methods that require post‐treatment. Unlike existing research on carbon‐based and fiber‐type wet‐spun supercapacitors, it is the first time for fabrication by adding a pseudocapacitive material. In addition, it shows the possibility of fabricating a supercapacitor using various active materials besides MnO 2 used in the paper.…”

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MnO₂/PtNP Embedded Wet‐Spun Fiber Supercapacitors

Kim

Lee

Park

et al. 2018

Adv Materials Technologies

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Here, we demonstrate continuously producible wet-spun supercapacitors having an embedded structure that consists of carbon nanotube (CNT), manganese dioxide (MnO 2 ), and platinum nanoparticle (PtNP). Amorphous MnO 2 , a promising pseudocapacitive material, was added to improve electrochemical performance to an average 20 times higher than wet-spun CNT fiber. However, MnO 2 has low conductivity and limited solidstate charge, with the result that electrochemical performance decreases induced by rate-capability decrease. Therefore, the rate capability was improved up to 60% and specific capacitance was obtained by adding PtNP to enhance ion accessibility and decrease equivalent series resistance (ESR). Furthermore, all-solidstate symmetric supercapacitors provide a capacitance of 53.1 mF cm −2 at 2 mV s −1 using poly(vinyl alcohol) (PVA)/LiCl gel electrolyte. Our MnO 2 /PtNP embedded wet-spun supercapacitor can be produced in a simple and easy one-step process compared with other methods that require post-treatment. Unlike existing research on carbon-based and fiber-type wet-spun supercapacitors, [18][19][20][21][22]25] it is the first time for fabrication by adding a pseudocapacitive material. In addition, it shows the possibility of fabricating a supercapacitor using various active materials besides MnO 2 used in the paper. Figure 1a shows a schematic image of the fabrication process of the wet-spun fiber-type supercapacitor. Other methods require complex thermal and electrochemical processes, but our wet-spinning method is simple and easily makes fiber-type supercapacitors including pseudocapacitive material without post-treatment, like hydrogen iodide treatment. First, a mixed solution of CNT powder, MnO 2 power, PtNP, and water fills a syringe with gauge inner diameter of 0.5 mm. Then, pushing the piston with constant speed makes wet-spun fiber into a spinning coagulation bath of PVA/water. MnO 2 is a transition metal dioxide that is a promising pseudocapacitive material. CNT is a conductive skeleton of fiber with good mechanical properties and provides alignment from its aspect ratio. CNT forms a conductive electrode while wrapping the MnO 2 . In addition, it is an environmentally friendly and low-cost material because of its abundance in nature, but it has low electrical conductivity (≈10 −6 S m −1 ). [26] Continuously fabricable wet-spun fiber supercapacitor has an issue of electrical conductivity because resistance is proportional to length. To overcome this Fiber-shaped microsupercapacitors that have small volume and high flexibility are particularly needed due to the sudden high demand for appropriate power sources for wearable electronics, smart textiles, and microrobotics. For commercialization of fiber supercapacitors, an economical and mass-producible fabrication process is required. However, most wet-spun fiber supercapacitors are graphene-based electrodes that require complicated and dangerous post-treatment, such as using heat and chemical reaction. Here, continuous wet-spun fiber supercapacitors ...

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Fabrication of Ultralong Hybrid Microfibers from Nanosheets of Reduced Graphene Oxide and Transition‐Metal Dichalcogenides and their Application as Supercapacitors

Cited by 103 publications

References 72 publications

A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode

A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode

Elastic Fiber Supercapacitors for Wearable Energy Storage

MnO₂/PtNP Embedded Wet‐Spun Fiber Supercapacitors

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Fabrication of Ultralong Hybrid Microfibers from Nanosheets of Reduced Graphene Oxide and Transition‐Metal Dichalcogenides and their Application as Supercapacitors

Cited by 103 publications

References 72 publications

A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode

A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode

Elastic Fiber Supercapacitors for Wearable Energy Storage

MnO2/PtNP Embedded Wet‐Spun Fiber Supercapacitors

Contact Info

Product

Resources

About

MnO₂/PtNP Embedded Wet‐Spun Fiber Supercapacitors