Enhancing Electrochemical Performance of Graphene Fiber-Based Supercapacitors by Plasma Treatment

Meng, Jie; Nie, Wenqi; Zhang, Kun; Xu, Fujun; Ding, Xin; Wang, Shiren; Qiu, Yiping

doi:10.1021/acsami.8b04438

Cited by 90 publications

(76 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latter was attributed to the combined redox reactions between the PANI and oxygen functional groups on the surface of the fibers, as well as to the synergistic effect of the pseudocapacitance (PANI-CNT) and EDLC (OPFCNT). Oxygen functional groups have been reported in other works to have improved capacitance of carbon-based materials [58][59][60][61] and this also plays a role in the enhanced electrochemical properties of the asymmetrical device. Figure 9 shows cyclic voltammetry graphs of all the devices at 200 and at 5 mV/s.…”

Section: Resultsmentioning

confidence: 85%

Fiber Supercapacitors Based on Carbon Nanotube-PANI Composites

Adusei¹,

Hsieh²,

Kanakaraj³

et al. 2019

Science, Technology and Advanced Application of Supercapacitors

View full text Add to dashboard Cite

Flexible and wearable electronic devices are of a high academic and industrial interest. In order to power these devices, there is a need for compatible energy storage units that can exhibit similar mechanical flexibility. Fiber-based devices have thus become increasingly popular since their lightweight , and flexible structure can be easily integrated into textiles. Supercapacitors have garnered a lot of attention due to their excellent cycling durability, fast charge times and superior power density. The primary challenge, however, with electric double layer capacitors (EDLCs), which are part of the supercapacitor family, is that their energy densities are significantly lower compared to those of batteries. Pseudocapacitors, on the other hand, can be designed and created with large energy densities and other outstanding properties typical for supercapacitors. This chapter discusses the fabrication and testing of supercapacitors based on carbon nanotube-polyaniline (PANI) composite fibers. These flexible and lightweight devices are assembled using different electrolytes for comparison. The created in this work PANI-CNT composite devices attain an energy density of 6.16 Wh/kg at a power density of 630 W/kg and retained a capacitance of 88% over 1000 charge-discharge cycles.

show abstract

Section: Resultsmentioning

confidence: 85%

Fiber Supercapacitors Based on Carbon Nanotube-PANI Composites

Adusei¹,

Hsieh²,

Kanakaraj³

et al. 2019

Science, Technology and Advanced Application of Supercapacitors

View full text Add to dashboard Cite

show abstract

“…Therefore, they have great potential in the application of flexible supercapacitors, as shown in Table 2. In particular, when they are used in micro electronic devices, textile electronic products, and implantable medical devices, they have unique advantages due to the small size, high flexibility, good braid ability, and easy integration into small-sized or various-shaped devices [84,85]. Compared with traditional planar supercapacitors, the energy density of fiber supercapacitors is lower, and the mechanical performance also faces great challenges.…”

Section: Fiber Supercapacitorsmentioning

confidence: 99%

Research Progress of Graphene-Based Materials on Flexible Supercapacitors

Xiao

Yuan

et al. 2020

Coatings

View full text Add to dashboard Cite

With the development of wearable and flexible electronic devices, there is an increasing demand for new types of flexible energy storage power supplies. The flexible supercapacitor has the advantages of fast charging and discharging, high power density, long cycle life, good flexibility, and bendability. Therefore, it exhibits great potential for use in flexible electronics. In flexible supercapacitors, graphene materials are often used as electrode materials due to the advantages of their high specific surface area, high conductivity, good mechanical properties, etc. In this review, the classification of flexible electrodes and some common flexible substrates are firstly summarized. Secondly, we introduced the advantages and disadvantages of five graphene-based materials used in flexible supercapacitors, including graphene quantum dots (GQDs), graphene fibers (GFbs), graphene films (GFs), graphene hydrogels (GHs), and graphene aerogels (GAs). Then, we summarized the latest developments in the application of five graphene-based materials for flexible electrodes. Finally, the defects and outlooks of GQDs, GFbs, GFs, GHs, and GAs used in flexible electrodes are given.

show abstract

“…The SC based on GO‐coated GBFs showed a capacitance of 391.2 mF cm −2 at a current density of 0.1 mA cm −2 , with energy densities of 8.7 and 66.41 mWh cm −2 when a PVA/H 2 SO 4 electrolyte and 1‐ethyl‐3‐methylimidazolium tetrafluoroborate (EMIBF 4 )/poly(vinylidene fluoride) (PVDF) electrolyte were used, respectively. In another recent research, plasma treatment was employed to create small pores in GBFs to improve the SSA . The capacitance of plasma‐treated GBFs was 36.25 mF cm −2 , much higher than that of pristine GBFs (26.55 mF cm −2 ).…”

Section: Progress In the Application Of Gbfsmentioning

confidence: 99%

Graphene‐Based Fibers: Recent Advances in Preparation and Application

Zhang

2019

Advanced Materials

109

View full text Add to dashboard Cite

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 ...

show abstract

Enhancing Electrochemical Performance of Graphene Fiber-Based Supercapacitors by Plasma Treatment

Cited by 90 publications

References 56 publications

Fiber Supercapacitors Based on Carbon Nanotube-PANI Composites

Fiber Supercapacitors Based on Carbon Nanotube-PANI Composites

Research Progress of Graphene-Based Materials on Flexible Supercapacitors

Graphene‐Based Fibers: Recent Advances in Preparation and Application

Contact Info

Product

Resources

About