Conductive, tough, hydrophilic poly(vinyl alcohol)/graphene hybrid fibers for wearable supercapacitors

Chen, Shaohua; Ma, Wujun; Xiang, Hengxue; Cheng, Yanhua; Yang, Shengrong; Weng, Wei

doi:10.1016/j.jpowsour.2016.04.030

Cited by 109 publications

(74 citation statements)

References 57 publications

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“…It is highly recommended that cyclic performance under dynamically mechanical deformations such as bending, folding, twisting, stretching, and compressing is systematically tested. Moreover, despite some research on the mechanical strength of electrodes and short‐term cycle test under stress, the long‐term mechanical properties of ESTs have never been investigated. Researchers have only conducted mechanical flexibility tests by bending ESTs at different angles for less than 1000 cycles, while data of fatigue life under conditions simulating daily wearable conditions are still absent in the literature.…”

Section: Challenges Of Ests For Future Wearable Applicationsmentioning

confidence: 99%

Advances in Flexible and Wearable Energy‐Storage Textiles

Liu

et al. 2018

Small Methods

147

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Considerable attention has been drawn to flexible and wearable energy‐storage devices due to the blooming of portable and wearable electronics in recent years. However, huge challenges are yet to be addressed before the need of both high flexibility and high performance can be met. With many desired features for wearable applications, textiles have become a growing research frontier where scientific views from various fields collide, sparking new ideas. Here, recent research progress in energy‐storage textiles (ESTs), in which textiles are employed to enhance either electrochemical performance or flexibility and wearability, is summarized. The research of ESTs is mainly divided into three parts, with a focus on supercapacitors, lithium‐ion batteries (LIBs), and some other representative battery systems, respectively. Electrode preparation, cell assembly, device performance, and the remaining challenges are discussed in detail, aiming to provide insights for future development.

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Section: Challenges Of Ests For Future Wearable Applicationsmentioning

confidence: 99%

Advances in Flexible and Wearable Energy‐Storage Textiles

Liu

et al. 2018

Small Methods

147

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“…Conducting nanofibers of polyaniline/polyethylene oxide with non-covalently functionalized graphene, also fabricated by electrospinning exhibited two orders of magnitude enhancement in electrical conductivity (Moayeri and Ajji, 2015). Wet spinning has been applied to elastomers, and both conducting and insulating polymers have been prepared using mainly GO as an additive, followed by post-spinning reduction (Ding et al, 2014;Chen et al, 2016;Seyedin et al, 2016). PVA/rGO and polypyrrole/rGO fibers prepared by this method showed excellent electrochemical performance for use in lightweight supercapacitors (Ding et al, 2014;Chen et al, 2016).…”

Section: Current Research Statusmentioning

confidence: 99%

“…Wet spinning has been applied to elastomers, and both conducting and insulating polymers have been prepared using mainly GO as an additive, followed by post-spinning reduction (Ding et al, 2014;Chen et al, 2016;Seyedin et al, 2016). PVA/rGO and polypyrrole/rGO fibers prepared by this method showed excellent electrochemical performance for use in lightweight supercapacitors (Ding et al, 2014;Chen et al, 2016). Melt spinning was used to fabricate conducting textile fibers of polypropylene (PP) with hybridized graphite nanoplatelets, carbon black filler, and amine functionalized graphene/polyamide 6 fibers (Nilsson et al, 2013;Hou et al, 2014).…”

Section: Current Research Statusmentioning

confidence: 99%

New Perspectives on Graphene/Polymer Fibers and Fabrics for Smart Textiles: The Relevance of the Polymer/Graphene Interphase

et al. 2018

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The fast-growing interest in smart textiles for wearable electronics or sensors is stimulating considerable activity in the development of functional fibers and fabrics that incorporate graphene, due to its outstanding electrical, mechanical, and thermal properties, among others. This paper provides an overview of the current state-of-the-art of research in this field, and a perspective on the factors decisive to its growth, in particular the polymer-graphene interphase.

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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.…”

mentioning

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.…”

mentioning

confidence: 99%

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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Conductive, tough, hydrophilic poly(vinyl alcohol)/graphene hybrid fibers for wearable supercapacitors

Cited by 109 publications

References 57 publications

Advances in Flexible and Wearable Energy‐Storage Textiles

Advances in Flexible and Wearable Energy‐Storage Textiles

New Perspectives on Graphene/Polymer Fibers and Fabrics for Smart Textiles: The Relevance of the Polymer/Graphene Interphase

MnO₂/PtNP Embedded Wet‐Spun Fiber Supercapacitors

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Conductive, tough, hydrophilic poly(vinyl alcohol)/graphene hybrid fibers for wearable supercapacitors

Cited by 109 publications

References 57 publications

Advances in Flexible and Wearable Energy‐Storage Textiles

Advances in Flexible and Wearable Energy‐Storage Textiles

New Perspectives on Graphene/Polymer Fibers and Fabrics for Smart Textiles: The Relevance of the Polymer/Graphene Interphase

MnO2/PtNP Embedded Wet‐Spun Fiber Supercapacitors

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Product

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MnO₂/PtNP Embedded Wet‐Spun Fiber Supercapacitors