Enhanced electrochemical performance of graphene aerogels by using combined reducing agents based on mild chemical reduction method

Shadkam, Ramin; Naderi, M.; Ghazitabar, Arash; Alamdari, Armin Asghari; Shateri, Sara

doi:10.1016/j.ceramint.2020.05.297

Cited by 20 publications

(11 citation statements)

References 53 publications

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“…It was found that, instead of peak at 10.5ºC for GO, a new broadened diffraction peak, which is close to the peak of the graphite, appeared in the rGO aerogel. These results indicate π-π stacking between the reduced graphene oxide sheets in aerogel and inhomogeneous graphite-like carbon crystalline state [31]. The hexagonal phase structure of GeO 2 was precisely provided to all α-GeO 2 diffraction peaks (JCPDS card no.…”

Section: Resultsmentioning

confidence: 75%

GeO 2 nanoparticles loaded reduced graphene oxide aerogel as a lithium-ion battery anode

Cakmak

2023

Preprint

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Germanium dioxide/reduced graphene oxide (GeO2/rGO) composite aerogel is synthesized by using supercritical drying method. rGO and composite aerogel show high specific surface area. In addition, as an anode material for lithium-ion batteries (LIBs), the composite aerogel exhibits a good capacity retention after 500 cycles. The outstanding characteristics of non-aggregated graphene and homogeneously dispersed GeO2 nanoparticles in the rGO/GeO2 aerogel account for the noticeable electrochemical properties. The application of the rGO/GeO2 electrode indicated in this study is estimated to encourage the development of affordable carbon-based materials for LIBs anode applications.

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Section: Resultsmentioning

confidence: 75%

GeO 2 nanoparticles loaded reduced graphene oxide aerogel as a lithium-ion battery anode

Cakmak

2023

Preprint

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“… Chemical reduction, which is beneficial for large-scale production, and various reducing agents can be selected [ 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. Electrochemical reduction [ 66 , 67 , 68 ]. The hydrogel prepared by this method is applied to the electrode surface and can be directly applied to the electrode materials of electrochemical instruments.…”

Section: Synthesis Of 3d Graphene Frameworkmentioning

confidence: 99%

“…Electrochemical reduction [ 66 , 67 , 68 ]. The hydrogel prepared by this method is applied to the electrode surface and can be directly applied to the electrode materials of electrochemical instruments.…”

Section: Synthesis Of 3d Graphene Frameworkmentioning

confidence: 99%

Recent Progress of Toxic Gas Sensors Based on 3D Graphene Frameworks

Dong

Xiao

Chu

et al. 2021

Sensors

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Air pollution is becoming an increasingly important global issue. Toxic gases such as ammonia, nitrogen dioxide, and volatile organic compounds (VOCs) like phenol are very common air pollutants. To date, various sensing methods have been proposed to detect these toxic gases. Researchers are trying their best to build sensors with the lowest detection limit, the highest sensitivity, and the best selectivity. As a 2D material, graphene is very sensitive to many gases and so can be used for gas sensors. Recent studies have shown that graphene with a 3D structure can increase the gas sensitivity of the sensors. The limit of detection (LOD) of the sensors can be upgraded from ppm level to several ppb level. In this review, the recent progress of the gas sensors based on 3D graphene frameworks in the detection of harmful gases is summarized and discussed.

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“…Accordingly, the high SSA and porosity of NS-3DPGH-150 with abundant mesopores is advantageous in facilitating the electrolyte ions diffusion, thus enhancing electrochemical capacitance [28][29]. [31].…”

Section: Microstructure Characterizationsmentioning

confidence: 99%

“…With the mass of the thiourea increasing from 50 to 200 mg, the size of the interconnected pores gradually increases from a few micrometers to tens of micrometers, meanwhile some smaller pores within the 'silk-like' textures form the characteristic hierarchical structure. The unique 3D porous structure is beneficial to fast electrolyte permeation and ion transport [27][28][29][30]. Representative TEM images of NS-3DPGH-150 are displayed in figures 3(e), (f) to provide further information on the morphology of structures.…”

Section: Microstructure Characterizationsmentioning

confidence: 99%

Porous 3D graphene aerogel co-doped with nitrogen and sulfur for high-performance supercapacitors

Chen

et al. 2021

Nanotechnology

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Heteroatom-doped carbon materials with a high specific area, a well-defined porous structure is important to high-performance supercapacitors (SCs). Here, S and N co-doped three-dimensional porous graphene aerogel (NS-3DPGHs) have been synthesized in a facile and efficient self-assembly process with thiourea acting as the reducing and doping agent solution. Operating as a SC electrode, fabricated co-doping graphene, i.e. the sample of NS-3DPGH-150 exhibits the highest specific capacitance of 412.9 F g−1 under 0.5 A g−1 and prominent cycle stabilization with 96.4% capacitance retention in the back of 10 000 cycles. Furthermore, based on NS-3DPGH-150, the symmetrical supercapacitor as-prepared in 6 M KOH displays a superior energy density of 12.9 Wh kg−1 under the power density of 249 W kg−1. Hence, NS-3DPGHs could be considered as an excellent candidate for SCs.

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Enhanced electrochemical performance of graphene aerogels by using combined reducing agents based on mild chemical reduction method

Cited by 20 publications

References 53 publications

GeO 2 nanoparticles loaded reduced graphene oxide aerogel as a lithium-ion battery anode

GeO 2 nanoparticles loaded reduced graphene oxide aerogel as a lithium-ion battery anode

Recent Progress of Toxic Gas Sensors Based on 3D Graphene Frameworks

Porous 3D graphene aerogel co-doped with nitrogen and sulfur for high-performance supercapacitors

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