External vibrations can destroy the specific capacitance of supercapacitors – from experimental proof to theoretical explanations

2021 ◽  
Author(s):  
Sudipta Biswas ◽  
Vikas Sharma ◽  
Trilok Singh ◽  
Amreesh Chandra
Keyword(s):  
Metal Oxide ◽  
Specific Capacitance ◽  
Experimental Proof ◽  
Carbon Based

External vibrations can destroy the specific capacitance in supercapacitors. Carbon based supercapacitors show a higher ability to absorb the impacts of external vibrations, in comparison to metal oxide based pseudocapacitors.

In-situ synthesis of metal oxide and polymer decorated activated carbon-based photocatalyst for organic pollutants degradation

2022 ◽  
pp. 120380
Author(s):  
Amar R. Singh ◽  
Pratik S. Dhumal ◽  
Madhuri Bhakare ◽  
Kshama D. Lokhande ◽  
Mahesh P. Bondarde ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Metal Oxide ◽  
Organic Pollutants ◽  
In Situ Synthesis ◽  
Carbon Based

Photocatalytic Inactivation of Pathogenic Viruses Using Metal Oxide and Carbon-Based Nanoparticles

2021 ◽  
pp. 125-138
Author(s):  
Lan Ching Sim ◽  
Wei Qing Wee ◽  
Shien Yoong Siow ◽  
Kah Hon Leong ◽  
Jit Jang Ng ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Photocatalytic Inactivation ◽  
Pathogenic Viruses ◽  
Carbon Based

Review on carbon-based composite materials for capacitive deionization

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15205-15225 ◽  
Author(s):  
Yong Liu ◽  
Chunyang Nie ◽  
Xinjuan Liu ◽  
Xingtao Xu ◽  
Zhuo Sun ◽  
...  
Keyword(s):  
Composite Materials ◽  
Metal Oxide ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Capacitive Deionization ◽  
Polymer Metal ◽  
Carbon Based

Carbon-based composite electrode materials, including carbon–carbon, carbon–metal oxide, carbon–polymer and carbon–polymer–metal oxide for efficient capacitive deionization are summarized.

MOF-derived binary mixed metal/metal oxide @carbon nanoporous materials and their novel supercapacitive performances

2016 ◽  
Vol 18 (27) ◽  
pp. 17941-17948 ◽  
Author(s):  
Y. C. Wang ◽  
W. B. Li ◽  
L. Zhao ◽  
B. Q. Xu
Keyword(s):  
Metal Oxide ◽  
Specific Capacitance ◽  
Manganese Oxides ◽  
Critical Parameter ◽  
Nanoporous Materials ◽  
Carbonization Temperature ◽  
Mixed Metal ◽  
Carbon Framework ◽  
Metal Metal

A remarkable specific capacitance of 800 F g−1 was obtained using cobalt and manganese oxides in a carbon framework derived from CoMn-MOF-74; carbonization temperature is a critical parameter.

scholarly journals Development of New Carbon-Based Electrode Material from Oil Palm Waste-Derived Reduced Graphene Oxide and Its Capacitive Performance Evaluation

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Salisu Nasir ◽  
Mohd Zobir Hussein ◽  
Zulkarnain Zainal ◽  
Nor Azah Yusof
Keyword(s):  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
Oil Palm ◽  
Palm Kernel ◽  
Graphene Oxides ◽  
Palm Kernel Shell ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides ◽  
Carbon Based

This paper is an expansion of our previous work on the synthesis of graphene oxides and reduced graphene oxides from different kinds of oil palm waste-based feedstocks, namely, OPL (oil palm leaf), PKS (palm kernel shell), and EFB (empty fruit bunch). Here, the electrochemical measurements of the resulting reduced graphene oxides derived via mild-temperature annealing reduction of the graphene oxides were accomplished using cyclic voltammetry and galvanostatic charge/discharge processes. The findings put forward their promising features for supercapacitor applications. For instance, the reduced graphene oxide derived using EFB precursor (rGOEFB) which has a BET surface area of 117 m2 g-1 exhibits a specific capacitance of 688 F g−1 at an applied current density of 0.8 A g-1. This is higher than that observed for reduced graphene oxides derived from oil palm leaf (rGOOPL), palm kernel shell (rGOPKS), and the commercially acquired graphite (rGOCG), which possessed specific capacitance values of 632, 424, and 220 F g−1, respectively. It can be deduced that the specific capacitance of the reduced graphene oxide samples increases in the following order: (rGOCG) < (rGOPKS) < (rGOOPL) < (rGOEFB). In summary, these new classes of carbon-based nanomaterials could be applied as efficient electrode materials for supercapacitor application with potential good performance. With this novel green and sustainable approach, various carbon-based nanomaterials can be fabricated for a broad range of multifunctional applications.

scholarly journals Metal-Free Carbon-Based Supercapacitors—A Comprehensive Review

Electrochem ◽  
2020 ◽  
Vol 1 (4) ◽  
pp. 410-438
Author(s):  
Noureen Siraj ◽  
Samantha Macchi ◽  
Brian Berry ◽  
Tito Viswanathan
Keyword(s):  
Specific Capacitance ◽  
Low Cost ◽  
Metal Free ◽  
Energy Applications ◽  
Carbon Compounds ◽  
Elemental Doping ◽  
Forms Of Carbon ◽  
Supercapacitor Applications ◽  
Carbon Based

Herein, metal-free heteroatom doped carbon-based materials are being reviewed for supercapacitor and energy applications. Most of these low-cost materials considered are also derived from renewable resources. Various forms of carbon that have been employed for supercapacitor applications are described in detail, and advantages as well as disadvantages of each form are presented. Different methodologies that are being used to develop these materials are also discussed. To increase the specific capacitance, carbon-based materials are often doped with different elements. The role of doping elements on the performance of supercapacitors has been critically reviewed. It has been demonstrated that a higher content of doping elements significantly improves the supercapacitor behavior of carbon compounds. In order to attain a high percentage of elemental doping, precursors with variable ratios as well as simple modifications in the syntheses scheme have been employed. Significance of carbon-based materials doped with one and more than one heteroatom have also been presented. In addition to doping elements, other factors which play a key role in enhancing the specific capacitance values such as surface area, morphology, pore size electrolyte, and presence of functional groups on the surface of carbon-based supercapacitor materials have also been summarized.

Conformally deposited NiO on a hierarchical carbon support for high-power and durable asymmetric supercapacitors

2015 ◽  
Vol 3 (46) ◽  
pp. 23283-23288 ◽  
Author(s):  
Cao Guan ◽  
Yadong Wang ◽  
Yating Hu ◽  
Jilei Liu ◽  
Kuan Hung Ho ◽  
...  
Keyword(s):  
Metal Oxide ◽  
High Power ◽  
Carbon Support ◽  
Asymmetric Supercapacitors ◽  
Hierarchical Carbon ◽  
Carbon Based

Metal oxide based supercapacitors can provide much higher energy densities as compared with carbon-based ones.

scholarly journals Desulphurization of commercial diesel fuel using carbon-based metal oxide nanocomposites

2021 ◽  
Author(s):  
Bienvenu Rusumba Cherubala ◽  
John Kabuba ◽  
Limo Rutto
Keyword(s):  
Metal Oxide ◽  
Functional Groups ◽  
Diesel Fuel ◽  
Kinetic Models ◽  
Freundlich Isotherm ◽  
Operating Conditions ◽  
Order Kinetic ◽  
Feed Concentration ◽  
Sulphur Compounds ◽  
Carbon Based

Abstract This paper presents a slight on desulphurization process of the commercial diesel fuel using the carbon-based metal oxide nanocomposites such as graphene oxide, ZnO, rGO as a nano-adsorbent, activated carbon (PAC and AC) and charcoal Granular active carbon (GAC) to produce a fuel of less than 10 ppm sulphur content. The synthesised of sorbents were achieved using incipient impregnation, microwaved-assisted and chemical exfoliation methods. The materials were characterized using Thermogrametric Analyzer (TGA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometer (XRD), Brunauer, Emmett and Teller (BET). The examination effect of operating conditions on the adsorption capacity with DBT and Sulphur compounds adsorption, the isotherms and the adsorption kinetic models were evaluated. The experimental data for PAC and AC were well suited to Freundlich isotherm and pseudo second-order kinetic models. The results shown that the sulphur feed concentration, the space velocity and the functional groups of the adsorbents have a considerable effect on the adsorption. In addition, it was observed that the temperature in the range of 30 to 80oC has a significant effect on the adsorption of Sulphur compounds from diesel fuel using 20 wt% of sorbents. The rGO substrate which contained abundant oxygen functional groups was confirmed to promote the dispersion metal oxide and increased the adsorption efficiency of sulphur compounds (H2S and SO2) by providing oxygen ions weakly bound to the sulphur molecules. For the desulfurization process by adsorption, PAC and AC exhibited a better affinity for 80% removal of sulphur compared to the GAC and GO.

Electrochemical Analysis for Pharmaceuticals by the Advantages of Metal Oxide Nanomaterials

2020 ◽  
Vol 16 ◽  
Author(s):  
Bengi Usl ◽  
Sibel A. Ozkan ◽  
Sevinc Kurbanoglu ◽  
Cem Erkmen ◽  
Burcin Bozal-Palabiyik
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Electrochemical Sensors ◽  
Metal Oxide Nanoparticles ◽  
Electrochemical Techniques ◽  
Drug Analysis ◽  
Oxide Nanoparticles ◽  
Active Surface Area ◽  
Drug Mechanism ◽  
Carbon Based

Background: Electrochemical methods in drug analysis have a lot of advantages including simplicity, speed, low-cost instrumentation, informing about the drug mechanism, and non-affection by excipients in dosage forms. Electrochemical techniques utilize the advantages of nanomaterials to increase sensitivity and, in some cases, selectivity. Among these nanomaterials, metal oxide nanoparticles are also preferred by researchers because of their unique properties such as biocompatibility, stability, non-toxicity, and catalytic characteristic Objective: This review provided a brief information about metal oxide nanoparticles used in electrochemical sensors and summarized applications for drug analysis with these sensors in tables showing the studies in the literature during the last decade Results: In the last decade, metal oxides are frequently used in electrochemical drug analysis as electrode modifier individually and with other nanomaterials especially carbon-based ones. All these studies showed that metal oxide nanoparticles increase the active surface area of the electrode and the catalytic activity. Conclusion: When metal oxide nanoparticles and carbon-based nanomaterials are used together, they create a synergistic effect that further increases catalytic activity and thus lowers detection limits to be obtained in nM even pM levels

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