Graphene-Fiber-Based Supercapacitors Favor <i>N</i>-Methyl-2-pyrrolidone/Ethyl Acetate as the Spinning Solvent/Coagulant Combination

He, Nanfei; Qin, Pan; Liu, Yixin; Gao, Wei

doi:10.1021/acsami.7b05982

Cited by 40 publications

(40 citation statements)

References 69 publications

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“…This method is suitable for making tens of centimeters long fiber electrodes with very high active material loadings (>90 wt%). Wet‐spinning is an industrially viable approach to fiber production and has therefore attracted considerable attention for the fabrication of various FSC electrodes, such as graphene fibers, CNT fibers, and conducting polymer fibers . In wet‐spinning composite formulations containing an active material and a binder, the two components must be homogeneously dispersed to achieve “spinnablility” into long continuous fibers.…”

Section: Introductionmentioning

confidence: 99%

Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Zhang

Seyedin

Qin

et al. 2019

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applications because they can be integrated into textiles or be made elastic if the fiber electrodes are resilient to bending, stretching, and twisting. [7][8][9][10][11][12] To power electronics, FSCs require high electrical conductivity and high energy storage performance from the fiber electrodes. In hybrid fiber electrodes that comprise of at least one active material and a binder, these electrode properties are dependent upon the amount of active material (loading) and how well the two components are mixed. It is also important that the method of production can be made scalable and continuous. To date, however, a continuous and scalable production of fiber electrodes with high electrical conductivity and energy storage performance remains a challenge. One example of fiber fabrication is via a deposition technique that involves coating of active materials onto a conductive fiber substrate. [13][14][15][16][17][18] This method is simple and scalable to achieve FSC electrodes with active material loading of up to ≈30 wt%. [13,14] Another fiber fabrication example is biscrolling technique, which can trap active materials onto the helical corridors of carbon nanotube (CNT) sheets. [19][20][21][22][23][24][25] This method is suitable for making tens of centimeters long fiber electrodes with very high active material loadings (>90 wt%). Wet-spinning is an industrially viable approach to fiber production and has therefore attracted considerable attention for the fabrication of various FSC electrodes, such as graphene fibers, [26][27][28] CNT fibers, [29][30][31] and conducting polymer fibers. [32][33][34] In wet-spinning composite formulations containing an active material and a binder, the two components must be homogeneously dispersed to achieve "spinnablility" into long continuous fibers. Also, the two components must not limit the function of the other component particularly at high active material loading. The high conductivity and electrochemical performance of the active material must be maintained (for use as electrodes) and the binder must provide durability and flexibility (for continuous production).Ti 3 C 2 T x is one of the growing family of 2D early-transition metal carbides/carbonitrides (MXenes), which shows great promise for application in FSC electrodes. [14,35,36] Besides its high conductivity (up to 9880 S cm −1 ), [37] Ti 3 C 2 T x MXene has an exceptionally high capacitance (up to 1500 F cm −3 ) [38] that comes predominantly from the intercalation/deintercalation of H + and surface redox Fiber-shaped supercapacitors (FSCs) are promising energy storage solutions for powering miniaturized or wearable electronics. However, the scalable fabrication of fiber electrodes with high electrical conductivity and excellent energy storage performance for use in FSCs remains a challenge. Here, an easily scalable one-step wet-spinning approach is reported to fabricate highly conductive fibers using hybrid formulations of Ti 3 C 2 T x MXene nanosheets and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate....

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Section: Introductionmentioning

confidence: 99%

Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Zhang

Seyedin

Qin

et al. 2019

Small

179

242

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“…One way to realize these properties is to use fibrous conductors as the electrodes . Achievements in the employment of modified GFs as electrodes have pushed wearable supercapacitors to a user‐friendly level ( Figure A) . Huang et al directly used two as‐prepared GFs in parallel as the electrodes .…”

Section: Flexible Electronicsmentioning

confidence: 99%

A Review on Graphene Fibers: Expectations, Advances, and Prospects

et al. 2019

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Graphene fiber (GF) is a macroscopically assembled fibrous material made of individual units of graphene and its derivatives. Beyond traditional carbon fibers, graphene building blocks consisting of regulable sizes and regular orientations of GF are expected to generate extreme mechanical and transport properties, as well as multiple functions in smart electronic fibrous devices and textiles. Here, the features of GF are presented along four lines: preparation, morphology, structure–performance correlations, and state‐of‐the‐art applications as flexible and wearable electronics. The principles, experiments, and keys of fabricating GF from graphite with different methods, focusing on the industrially viable mainstream strategy, wet spinning, are introduced. Then, the fundamental relationship between the mechanical and transport properties and the structure, including both highly condensed structures for high‐performance and hierarchical structures for multiple functions, is presented. The advances of GF based on structure–performance formulas boost its functional applications, especially in electronic devices. Finally, the possible promotion methods and structural–functional integrated applications of GF are discussed.

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“…Besides of the inner structure, the outer surface of the GBF could also be influenced by the coagulation bath. For example, it was found that GBFs produced with the N ‐methyl‐2‐pyrrolidone dispersion of GO and an organic coagulation bath of ethyl acetate featured much rougher surface, exposing more surface sites for electrochemical applications …”

Section: Advance In Preparation Of Gbfsmentioning

confidence: 99%

Graphene‐Based Fibers: Recent Advances in Preparation and Application

Zhang

2019

Advanced Materials

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investigated [17][18][19][20] for building graphene-based fibers (GBFs) over recent years. [21][22][23] These unique macroscopic 1D assemblies of microscopic 2D graphene building blocks are of lightweight, high specific surface area (SSA), and remarkable mechanical and electrical properties, thus qualifying them as ideal materials for fiber electronics. [14,[24][25][26] Currently, the well-developed wet-spinning method is widely adopted in preparing GBFs, [27,28] while newly designed spinning methods with microfluidic spinnerets and different kinds of coagulation bath have yielded GBFs with novel structures and functions. Apart from these methods, emerging techniques such as chemical vapor deposition (CVD) and twisting have been developed to meet different applications of GBFs in strain sensors, stretchable SC, and multifunctional actuators. [9,29,30] Together with the evolution in their preparation, mechanical and electrical properties of GBFs have been considerably enhanced since their debut. Bioinspired strengthening and toughening strategies for membranes have been found to work for GBFs as well, and atomic doping methods have efficiently increased electrical conductivity of GBFs to a record value of 2.2 × 10 7 S m −1 , [31] which is even comparable to that of certain metals such as nickel (1.5 × 10 7 S m −1 ) and aluminum (3.5 × 10 7 S m −1 ). Based on their novel structures and significantly enhanced mechanical/electrical properties, GBFs have found their substantial uses particularly in newly designed, high-performance electrochemical devices for energy conversion and storage.Several excellent reviews have witnessed the rapid development of GBFs. [17,20,23] For example, Chou and co-workers [18] previously gave a comprehensive review on the synthesis, device performance, and potential applications of GBFs. Another review presented by Gao and his colleagues [32] focused on the microscopic mechanism during liquid crystal formation and summarized its effects on producing continuous fibers. Additionally, applications of GBFs in flexible/ wearable SCs and bioinspired nanocomposites were specifically discussed by Huang et al. [25] and Cheng and co-workers, [33] respectively. In this featured article, we mainly focus on very recent research advances in GBFs over the past few years and introduce progresses in preparation techniques, strategies for performance enhancement and novel applications (Figure 1), aiming to provide a state-of-the-art update for GBFs as well as perspectives for their future development.Graphene-based fibers (GBFs) are macroscopic 1D assemblies formed by using microscopic 2D graphene sheets as building blocks. Their unique structure exhibits the same merits as graphene such as low weight, high specific surface area, excellent mechanical/electrical properties, and ease of functionalization. Furthermore, the fibrous nature of GBFs is intrinsically compatible with existing textile technologies, making them suitable for applications in flexible and wearable electronics. Recently, novel synthetic ...

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Graphene-Fiber-Based Supercapacitors Favor N-Methyl-2-pyrrolidone/Ethyl Acetate as the Spinning Solvent/Coagulant Combination

Cited by 40 publications

References 69 publications

Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

A Review on Graphene Fibers: Expectations, Advances, and Prospects

Graphene‐Based Fibers: Recent Advances in Preparation and Application

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Graphene-Fiber-Based Supercapacitors Favor N-Methyl-2-pyrrolidone/Ethyl Acetate as the Spinning Solvent/Coagulant Combination

Cited by 40 publications

References 69 publications

Highly Conductive Ti3C2Tx MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Highly Conductive Ti3C2Tx MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

A Review on Graphene Fibers: Expectations, Advances, and Prospects

Graphene‐Based Fibers: Recent Advances in Preparation and Application

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Product

Resources

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Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors