Facile synthesis and high volumetric capacitance of holey graphene film for supercapacitor electrodes with optimizing preparation conditions

Natural nacre built up with brick-and-mortar architecture, exhibiting extraordinary strength and toughness, provides an inspiration to construct high-performance multifunctional film for flexible energy storage and portable electrical devices. In the...

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Two-Dimensional Hybrid Composites of SnS2 Nanosheets Array Film with Graphene for Enhanced Photoelectric Performance

Nanomaterials ◽

10.3390/nano9081122 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1122

Author(s):

Feier Fang ◽

Henan Li ◽

Huizhen Yao ◽

Ke Jiang ◽

Zexiang Liu ◽

...

Keyword(s):

Hybrid Composites ◽

Layer Structure ◽

Graphene Film ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer ◽

Two Dimensional ◽

Strong Light ◽

Preparation Conditions ◽

Metal Dichalcogenides

Two-dimensional (2D) metal dichalcogenides have attracted considerable attention for use in photoelectric devices due to their unique layer structure and strong light-matter interaction. In this paper, vertically grown SnS2 nanosheets array film was synthesized by a facile chemical bath deposition (CBD). The effects of deposition time and annealing temperature on the quality of SnS2 films was investigated in detail. By optimizing the preparation conditions, the SnS2 array film exhibited efficient photoelectric detection performance under sunlight. Furthermore, in order to improve the performance of the photodetector based on SnS2 nanosheets film, a transparent graphene film was introduced as the hole-transport layer by wet-chemical method directly transferring techniques. Graphene/SnS2 nanosheets array film heterojunction photodetectors exhibit enhanced photoresponsivity. The light on/off ratio of the photodetector based on graphene/SnS2 was 1.53, about 1.4 times higher than that of the pristine SnS2 array films. The improved photoresponse performance suggested that the effective heterojunction between vertical SnS2 nanosheets array film and graphene suppresses the recombination of photogenerated carriers. The results indicate that the graphene/SnS2 heterojunction photodetectors have great potential in photodetection devices.

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Facile synthesis of metal @ carbon sphere/graphene film electrodes with enhanced energy density for flexible asymmetric all-solid-state supercapacitors

Journal of Electroanalytical Chemistry ◽

10.1016/j.jelechem.2019.113199 ◽

2019 ◽

Vol 847 ◽

pp. 113199 ◽

Cited By ~ 2

Author(s):

Lanshu Xu ◽

Yue Li ◽

Chen Cheng ◽

Jianmin Gao ◽

Xiaojuan Jin ◽

...

Keyword(s):

Solid State ◽

Energy Density ◽

Graphene Film ◽

Carbon Sphere ◽

Facile Synthesis

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Facile synthesis of functionalized graphene hydrogel for high performance supercapacitor with high volumetric capacitance and ultralong cycling stability

Applied Surface Science ◽

10.1016/j.apsusc.2018.05.161 ◽

2018 ◽

Vol 455 ◽

pp. 683-695 ◽

Cited By ~ 34

Author(s):

Yangyang Tan ◽

Dongling Wu ◽

Tao Wang ◽

Penggao Liu ◽

Jia Guo ◽

...

Keyword(s):

High Performance ◽

Cycling Stability ◽

Functionalized Graphene ◽

Facile Synthesis ◽

Volumetric Capacitance

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Facile synthesis of bowl-shaped nitrogen-doped carbon hollow particles templated by block copolymer “kippah vesicles” for high performance supercapacitors

Polymer Chemistry ◽

10.1039/c6py00161k ◽

2016 ◽

Vol 7 (11) ◽

pp. 2092-2098 ◽

Cited By ~ 43

Author(s):

Zhixing Lin ◽

Hao Tian ◽

Fugui Xu ◽

Xiangwen Yang ◽

Yiyong Mai ◽

...

Keyword(s):

Energy Storage ◽

Block Copolymer ◽

Self Assembly ◽

High Performance ◽

Facile Synthesis ◽

Hollow Particles ◽

Nitrogen Doped ◽

Assembly Strategy ◽

Volumetric Capacitance ◽

Nitrogen Doped Carbon

This paper reports a simple self-assembly strategy towards bowl-shaped carbon-containing hollow particles for high volumetric capacitance supercapacitors, as well as an unprecedented potential application for block copolymer vesicles in energy storage.

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Interpretation of irradiation-induced changes in electron diffractograms and images of extinction contours at low temperatures

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111458 ◽

1984 ◽

Vol 42 ◽

pp. 268-269

Author(s):

E. Knapek ◽

H. Formanek ◽

G. Lefranc ◽

I. Dietrich

Keyword(s):

Low Temperatures ◽

Carbon Films ◽

Organic Crystals ◽

Wide Spread ◽

Lens System ◽

Preparation Conditions ◽

Thin Carbon ◽

Electron Diffractograms ◽

Diffraction Patterns ◽

Induced Changes

A few years ago results on cryoprotection of L-valine were reported, where the values of the critical fluence De i.e, the electron exposure which decreases the intensity of the diffraction reflections by a factor e, amounted to the order of 2000 + 1000 e/nm2. In the meantime a discrepancy arose, since several groups published De values between 100 e/nm2 and 1200 e/nm2 /1 - 4/. This disagreement and particularly the wide spread of the results induced us to investigate more thoroughly the behaviour of organic crystals at very low temperatures during electron irradiation.For this purpose large L-valine crystals with homogenuous thickness were deposited on holey carbon films, thin carbon films or Au-coated holey carbon films. These specimens were cooled down to nearly liquid helium temperature in an electron microscope with a superconducting lens system and irradiated with 200 keU-electrons. The progress of radiation damage under different preparation conditions has been observed with series of electron diffraction patterns and direct images of extinction contours.

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The 3-Dimensional Molecular Structure of the Actin Filament Revisited

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100119223 ◽

1985 ◽

Vol 43 ◽

pp. 480-481

Author(s):

U. Aebi ◽

R. Millonig ◽

H. Salvo

Keyword(s):

Actin Filament ◽

Supramolecular Assembly ◽

Specimen Preparation ◽

X Ray Diffraction ◽

Single Filament ◽

X Ray ◽

3 Dimensional ◽

Filament Diameter ◽

Preparation Conditions ◽

Apparent Diameter

To date, most 3-D reconstructions of undecorated actin filaments have been obtained from actin filament paracrystal data (for refs, see 1,2). However, due to the fact that (a) the paracrystals may be several filament layers thick, and (b) adjacent filaments may sustantially interdigitate, these reconstructions may be subject to significant artifacts. None of these reconstructions has permitted unambiguous tracing or orientation of the actin subunits within the filament. Furthermore, measured values for the maximal filament diameter both determined by EM and by X-ray diffraction analysis, vary between 6 and 10 nm. Obviously, the apparent diameter of the actin filament revealed in the EM will critically depend on specimen preparation, since it is a rather flexible supramolecular assembly which can easily be bent or distorted. To resolve some of these ambiguities, we have explored specimen preparation conditions which may preserve single filaments sufficiently straight and helically ordered to be suitable for single filament 3-D reconstructions, possibly revealing molecular detail.

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