Hierarchically porous sheath–core graphene-based fiber-shaped supercapacitors with high energy density

Zheng, Xianhong; Zhang, Kun; Yao, Lan; Qiu, Yiping; Wang, Shiren

doi:10.1039/c7ta08362a

Cited by 82 publications

(80 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… In a two‐electrode system, the electrochemical performance variation of (a) stack capacitance and (b) stack energy of Z‐MSC with scan rate increasing, (c) Ragone plot of D ‐MSC and Z‐MSC, and (d) cycling life of 16E Z‐MSC (CV curve under 10 V s −1 in inset). (Reference: activated carbon SC, 3.5 V/25 mF SC, 63 V/220 μF electrolytic capacitor, 4 V/500 μAh Li thin film battery, 3 V/300 μF Al electrolytic capacitor, graphene/fiber SC).…”

Section: Resultsmentioning

confidence: 99%

Electrophoretic Deposition of Binder‐Free MOF‐Derived Carbon Films for High‐Performance Microsupercapacitors

Park

Kim

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

Recently, miniaturized power supplies have become essential components of micro‐electromechanical systems (MEMS) and portable microdevices due to their high‐power density, moderate specific energy, and superior long‐term cyclability. In this study, microsupercapacitors with ZIF‐8‐derived carbons as active materials were successfully fabricate by electrophoretic deposition method. The carbon materials on microsupercapacitors, which are directly deposited or obtained by pyrolyzing predeposited ZIF‐8 particles, play a crucial role in achieving outstanding electrochemical performances. The microsupercapacitor of 16 interdigital finger electrodes, prepared by electrophoretic deposition of ZIF‐8 particles and subsequent pyrolysis, shows maximum specific power 687.6 mW cm−3, specific energy 2.87 mWh cm−3, and 97.8 % capacitance retention rate after 10 000 cycles. The simple and facile process of electrophoretic deposition and subsequent pyrolysis of ZIF‐8 particles generates a film of densely populated microporous carbon particles on microsupercapacitor, leading to superior capacitive performances.

show abstract

Section: Resultsmentioning

confidence: 99%

Electrophoretic Deposition of Binder‐Free MOF‐Derived Carbon Films for High‐Performance Microsupercapacitors

Park

Kim

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…To enhance the electrochemical performance of the pristine GBF, strategies such as increasing the SSA, chemical doping, and hybridization with other 2D materials have been proposed. The SSA, which is directly related to the formation of electric double layers (EDLs) during charge storage, can be enhanced by introducing hierarchical pores into the GBF . By coating wet‐spun GBFs with GO sheets of smaller sizes, tiny pores in the shell layer largely increased the SSA, while the conductivity of the core could be well maintained.…”

Section: Progress In the Application Of Gbfsmentioning

confidence: 99%

Graphene‐Based Fibers: Recent Advances in Preparation and Application

Zhang

2019

Advanced Materials

110

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

“…However, the issue of low energy density related to large‐volume inactive substrate seriously hindered their practical applications in flexible and wearable electronics. [ 25–27 ] Thus, it is still highly desirable to develop new types of flexible and wearable ZIBs with improved performance to meet the requirement of wearable devices.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Concentric Circle Structured Zinc‐Ion Micro‐Battery with Electrodeposited Electrodes

Jia

et al. 2020

Small Methods

View full text Add to dashboard Cite

High‐performance all‐solid‐state rechargeable batteries with highly wearable, deformable, and waterproof features have attracted considerable attention for their promising applications in next‐generation wearable electronics. Herein, a flexible all‐solid‐state in‐plane Zn‐polyaniline (PANI) micro‐battery with concentric circle structure is reported by directly electrodepositing both positive and negative electrode materials on tyrene‐isoprene styrene rubber (SIS) substrate. As‐fabricated battery delivers a high specific area capacity of 250 µAh cm−2, a high energy density (0.25 mW h cm−2) and a high power density (0.99 mW cm−2) as well as excellent cyclin stability (68% capacity retention after 1200 cycles). More importantly, the concentric circle structured micro‐battery exhibits superior mechanical flexibility, reasonable stretchability, outstanding waterproof ability, and temperature resistance up to 80 °C and excellent integratability with wireless charging coils.

show abstract

Hierarchically porous sheath–core graphene-based fiber-shaped supercapacitors with high energy density

Abstract: Hierarchically porous, micropore-domain graphene-based fiber-shaped supercapacitors show high energy density.

Cited by 82 publications

References 77 publications

Electrophoretic Deposition of Binder‐Free MOF‐Derived Carbon Films for High‐Performance Microsupercapacitors

Electrophoretic Deposition of Binder‐Free MOF‐Derived Carbon Films for High‐Performance Microsupercapacitors

Graphene‐Based Fibers: Recent Advances in Preparation and Application

A Flexible Concentric Circle Structured Zinc‐Ion Micro‐Battery with Electrodeposited Electrodes

Contact Info

Product

Resources

About