Hierarchical core-shell fibers of graphene fiber/radially-aligned molybdenum disulfide nanosheet arrays for highly efficient energy storage

Tang, Min; Wu, Yuntao; Yang, Jing; Xue, Yuhua

doi:10.1016/j.jallcom.2019.153622

Cited by 32 publications

(27 citation statements)

References 31 publications

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“…The areal specific capacitance of A1P1-GPE is 697.22 mF cm –2 at a current density of 5 mA cm –2 and maintains 316.66 mF cm –2 at a current density of 50 mA cm –2 , which is much higher than that of A0P1-GPE (158.33 mF cm –2 at 5 mA cm –2 and 19.44 mF cm –2 at 50 mA cm –2 ). Compared with previously reported hydrogel electrolytes, ,,, the A1P1-GPE exhibits the widest electrochemical window and highest capacitance. Figure c displays the electrochemical impedance spectra (EIS) of the A1P0-, A3P1-, A1P1-, A1P3-, and A0P1-GPEs.…”

Section: Resultsmentioning

confidence: 67%

“…Gel polymer electrolytes (GPEs) are composed of a polymer matrix, abundant solvent water, and an electrolyte salt. Several polymers such as poly(ethylene oxide) (PEO), , poly(vinylidene fluoride) (PVDF), , poly(vinyl alcohol) (PVA), − poly(methyl methacrylate) (PMMA), , and poly(acrylonitrile) (PAN) , have been researched as matrixes in GPEs. To date, PVA has garnered wide attention in GPEs due to its fantabulous membrane-forming ability, chemical stability, and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte

Yan

Zou

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE has developed a reputation due to low ionic conductivity endowed by its high crystallinity and poor water retention capacity. In this work, density functional theory (DFT) calculations first revealed that the high crystallinity of PVA can be greatly disrupted by forming hydrogen bonds with natural agarose macromolecules. The hydrogen bond interpenetrated three-dimensional agarose/PVA network offers high water retention and large amounts of channels for movement of Li + on hydroxyl oxygen atoms. So, an optimized formation of the Li−O coordinate bond (g Li−O (r) = 8.78) and improved diffusion coefficient of Li + (D Li + ) (71 × 10 −6 cm 2 s −1 ) were obtained in the agarose/PVA model. When assembled into SSCs, agarose/PVA-GPE with 2 M LiOAc (AP-GPE) exhibits an outstanding specific capacitance (697.22 mF cm −2 at 5 mA cm −2 ). The high water retention of agarose and large amounts of −OH groups in the agarose macromolecular can generate H 2 O by dehydration reaction, reducing the flammability of PVA and greatly enhancing the safety of SSCs.

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Section: Resultsmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte

Yan

Zou

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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“…The Ragone plots in Figure 5h compare the energy and power densities of the supercapacitor in this work and recently reported FSSs based on carbonaceous fibers. The energy density reported in this study is larger than most of previously reported FSSs, including supercapacitors based on CNT/MnO 2 and CNT/PPy fibers (18.88 μWh cm −2 ), 3 coaxial graphene fibers (17.50 μWh cm −2 ), 33 graphene/ WS 2 fibers (16.86 μWh cm −2 ), 34 graphene/MoS 2 fibers (14.67 μW h cm −2 ), 35 Pt/CNT@PANI yarn (12.68 μWh cm −2 ), 36 CF/ Ni/Co fibers (9.57 μWh cm −2 ), 37 rGO/conductive polymer fibers (4.55 μWh cm −2 ), 38 CNT/rGO composite fiber (3.80 μWh cm −2 ), 39 CF/MnO 2 and CF/MoO 3 fibers (2.70 μWh cm −2 ), 5 and CNT/MnO 2 fibers (1.14 μWh cm −2 ). 40 Meantime, it performs comparably to the FSS based on coaxial graphene fibers (30.8 μWh cm −2 ).…”

Section: Resultsmentioning

confidence: 99%

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

Yan

et al. 2021

ACS Appl. Energy Mater.

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Fiber-shaped supercapacitors (FSSs) are identified as promising facilities in flexible and wearable energy storage fields. In this study, an electrode with excellent formability was accomplished by depositing polypyrrole on highly aligned discontinuous carbon fiber (CF/PPy). For the FSS with core− sheath structure, CF/PPy fiber was the core electrode, LiCl/PVA was the electrolyte, and carbon nanotube/MnO 2 (CNT/MnO 2 ) film was the opposite electrode. The charge of core and opposite electrodes was paired by adjusting the electrochemical reaction times of MnO 2 and PPy. The obtained FSS had an areal capacitance of 66.27 mF cm −2 (lineal capacitance of 13.52 mF cm −1 and volumetric capacitance of 4.08 F cm −3 ) and a broadened potential window of 1.6 V, which resulted in a maximum energy density of 23.56 μWh cm −2 . The cycling stability was evaluated by charge−discharge test, and it retained 83% of its initial capacitance after 5000 cycles. Furthermore, the FSS showed exceptional flexibility and it retained above 90% of its capacitance after 200 repeated bending tests, illustrating excellent mechanical stability.

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“…[ 172 ] Owing to the synergistic effects between graphene and MoS 2 on fibers with vertically aligned structure exhibited areal capacitance up to 189.73 mF cm –2 and a high energy density of 14.665 μWh cm –2 . [ 173 ] Benefiting from intriguing morphological features due to its vertical alignment and enhanced conductivity, NiCo 2 O 4 @C 3 N 4 @VS 2 hybrids exhibited a high specific capacitance of 1984.1 F g ‐1 at 1 A g ‐1 , superior rate capacity (91.5% at 5 A g ‐1 ), and durability (88% retention over 5000 cycles at 5 A g ‐1 ). [ 174 ]…”

Section: Applications Of Vertically Aligned 2d Materialsmentioning

confidence: 99%

Vertically Aligned Graphene‐Analogous Low‐Dimensional Materials: A Review on Emerging Trends, Recent Developments, and Future Perspectives

Shinde

Samal

Rout

2022

Adv Materials Inter

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2D materials currently includes graphene, transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), 2D carbides/nitrides (MXenes), monoelemental Xenes, and perovskites. [2][3][4][5][6] These families opened new horizons for advanced applications since they have unusual electronic, mechanical, and optical properties. Though these materials have layered structures, yet their diversity in properties highly depends on their composition and phases.Graphene owns interesting properties like large surface area, dangling bond-free surface, high carrier mobility, high optical absorption coefficient, high Young's modulus, and high thermal conductivity. [7] However, the zero bandgap and semimetal properties of graphene limit its application in switching devices. h-BN attracted magnetized attention due to its superb chemical stability and intrinsic insulation. [8] As one of the most studied families, TMDs offer diversity in compositions, and phases, which exhibit many technologically interesting properties. [9][10][11] Among TMDs, MoS 2 is the most examined and well-explored material due to its robustness and semiconducting properties. TMDs offer a unique combination of atomic-scale thickness, strong spin-orbit coupling, sizeable bandgap, and favorable optoelectronic properties for numerous applications. [12] MXenes represent a large family of 2D materials whose several structures were predicted theoretically, while several of them have been realized experimentally also such as Ti

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Hierarchical core-shell fibers of graphene fiber/radially-aligned molybdenum disulfide nanosheet arrays for highly efficient energy storage

Cited by 32 publications

References 31 publications

Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte

Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

Vertically Aligned Graphene‐Analogous Low‐Dimensional Materials: A Review on Emerging Trends, Recent Developments, and Future Perspectives

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Hierarchical core-shell fibers of graphene fiber/radially-aligned molybdenum disulfide nanosheet arrays for highly efficient energy storage

Cited by 32 publications

References 31 publications

Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte

Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO2 Composite Electrodes

Vertically Aligned Graphene‐Analogous Low‐Dimensional Materials: A Review on Emerging Trends, Recent Developments, and Future Perspectives

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Product

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High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes