The recent progress on three-dimensional porous graphene-based hybrid structure for supercapacitor

Xiong, Chuanyin; Li, Bingbing; Lin, Xin; Liu, Heguang; Xu, Yongjian; Mao, Junjie; Duan, Chao; Li, Tiehu; Ni, Yonghao

doi:10.1016/j.compositesb.2018.11.085

Cited by 170 publications

(63 citation statements)

References 132 publications

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“…Such an enhancement in the capacitance can be attributed to a number of factors. GO with higher specific surface area increases the functioning area of the nanocomposite/electrolyte interface whereas the layered structure of GO diminishes the diffusion length of the electrolyte ions [ 50 , 51 ]. This improves the specific capacitance by increasing the electroactive region.…”

Section: Resultsmentioning

confidence: 99%

Enhanced electrochemical performance of flexible and eco-friendly starch/graphene oxide nanocomposite

Islam

Mollik

2020

Heliyon

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In this work, flexible plasticized starch/graphene oxide (PS/GO) nanocomposites are synthesized by a simple and economic solution cast technique. The structural and surface morphological study of the nanocomposite demonstrates an increased degree of interaction between PS and GO which in turn improves the mechanical strength and thermal stability of the nanocomposite. The influence of GO loading on the capacitive performance of the nanocomposite was evaluated by studying the electrochemical properties. The PS/GO nanocomposite showed an improved capacitive behavior with a specific capacitance of 115 F/g compared to that of pure starch (2.20 F/g) and GO (10.42 F/g) at a current density 0.1 mA/cm 2 . The electrochemical impedance analysis indicates that the incorporation of GO enhances the conductivity of the nanocomposite in the charge transfer resistance at the electrode/electrolyte interface due to the incorporation of GO. The large surface areas provided by the GO sheets allow faster transport of charge carriers into the electrode and improve the electrochemical properties of the PS/GO nanocomposite. Considering the simplicity and effectiveness of the synthesis proses, the result indicates that the PS/GO nanocomposite could be a potential alternative for bio-friendly, flexible energy-storage applications.

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Section: Resultsmentioning

confidence: 99%

Enhanced electrochemical performance of flexible and eco-friendly starch/graphene oxide nanocomposite

Islam

Mollik

2020

Heliyon

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“…Graphene foams, due to their excellent porous structure, are a light material that combines the properties of two-dimensional graphene sheets and the three-dimensional system they form when joined together. The large pore volume and subsequent high specific surface area of the material, its thermal stability, high electronic conductivity, and high ion transfer rate all contribute to graphene foams’ functionality in energy storage devices 28 , 33 , 34 . Hence, to further improve their properties, increase electrode capacity, and power or energy density, many researchers try to dope graphene materials with metal compounds or metal oxides, or to create composites with other active materials 35 – 38 .…”

Section: Introductionmentioning

confidence: 99%

N-doped graphene foam obtained by microwave-assisted exfoliation of graphite

Skorupska

Ilnicka

Łukaszewicz

2021

Sci Rep

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The synthesis of metal-free but electrochemically active electrode materials, which could be an important contributor to environmental protection, is the key motivation for this research approach. The progress of graphene material science in recent decades has contributed to the further development of nanotechnology and material engineering. Due to the unique properties of graphene materials, they have found many practical applications: among others, as catalysts in metal-air batteries, supercapacitors, or fuel cells. In order to create an economical and efficient material for energy production and storage applications, researchers focused on the introduction of additional heteroatoms to the graphene structure. As solutions for functionalizing pristine graphene structures are very difficult to implement, this article presents a facile method of preparing nitrogen-doped graphene foam in a microwave reactor. The influence of solvent type and microwave reactor holding time was investigated. To characterize the elemental content and structural properties of the obtained N-doped graphene materials, methods such as elemental analysis, high-resolution transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy were used. Electrochemical activity in ORR of the obtained materials was tested using cyclic voltamperometry (CV) and linear sweep voltamperometry (LSV). The tests proved the materials’ high activity towards ORR, with the number of electrons reaching 3.46 for tested non-Pt materials, while the analogous value for the C-Pt (20 wt% loading) reference was 4.

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“…In consideration of this situation, one effective method was to prepare various composites based on 3DG via loading active electrode materials onto the 3DG framework, including transition metal compounds [15][16][17][18][19] and conducting polymers [20,21], etc. [22][23][24][25], for further improving the performance. The specific capacitance has been enhanced up to several thousand F·g −1 [26].…”

Section: Introductionmentioning

confidence: 99%

Further Thermal Reduction of Reduced Graphene Oxide Aerogel with Excellent Rate Performance for Supercapacitors

Luo

Lin

2019

Applied Sciences

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Featured Application: The prepared three-dimensional graphene with porous structure and high electrical conductivity is an ideal electrode material for electrochemical energy storage devices, including supercapacitors and lithium ion batteries, etc.Abstract: Preparation of pure three-dimensional graphene (3DG) with high rate performance for supercapacitors is critical for fast rate charge/discharge. Here, 3DG was prepared via thermal annealing of freeze-dried reduced graphene oxide (RGO) hydrogel under inert gas protection. The formed 3DG as an electrode material for supercapacitors revealed a specific capacitance of 115 F·g −1 at a current density of 1 A·g −1 , and a high capacitance retention of 70% as current density increased to 40 A·g −1 . The excellent rate capability was mainly attributed to the reserved porous structure and higher electrical conductivity for 3DG after thermal reduction than its RGO hydrogel precursor.

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The recent progress on three-dimensional porous graphene-based hybrid structure for supercapacitor

Cited by 170 publications

References 132 publications

Enhanced electrochemical performance of flexible and eco-friendly starch/graphene oxide nanocomposite

Enhanced electrochemical performance of flexible and eco-friendly starch/graphene oxide nanocomposite

N-doped graphene foam obtained by microwave-assisted exfoliation of graphite

Further Thermal Reduction of Reduced Graphene Oxide Aerogel with Excellent Rate Performance for Supercapacitors

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