Effect of synthesis methods on the surface and electrochemical characteristics of metal oxide/activated carbon composites for supercapacitor applications

Yumak, Tuğrul; Bragg, D. B.; Sabolsky, Edward M.

doi:10.1016/j.apsusc.2018.09.079

Cited by 88 publications

(26 citation statements)

References 56 publications

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“…Three PCS-MnO 2 samples with different amounts of MnO 2 are clearly shown in Supplementary Figure S2 . It is worth noting that the sample of PCS-MnO 2 begins to lose weight before 300 °C, which is due to the release of water trapped in the sample [ 35 ]. The weight loss in the range of 300~450 °C is due to the oxidation of PCS.…”

Section: Resultsmentioning

confidence: 99%

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Liu

et al. 2020

Nanomaterials

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Polyethylene terephthalate (PET) plastic has been extensively used in our social life, but its poor biodegradability has led to serious environmental pollution and aroused worldwide concern. Up to now, various strategies have been proposed to address the issue, yet such strategies remain seriously impeded by many obstacles. Herein, waste PET plastic was selectively carbonized into three-dimensional (3D) porous carbon nanosheets (PCS) with high yield of 36.4 wt%, to be further hybridized with MnO2 nanoflakes to form PCS-MnO2 composites. Due to the introduction of an appropriate amount of MnO2 nanoflakes, the resulting PCS-MnO2 composite exhibited a specific capacitance of 210.5 F g−1 as well as a high areal capacitance of 0.33 F m−2. Furthermore, the PCS-MnO2 composite also showed excellent cycle stability (90.1% capacitance retention over 5000 cycles under a current density of 10 A g−1). The present study paved an avenue for the highly efficient recycling of PET waste into high value-added products (PCSs) for electrochemical energy storage.

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Section: Resultsmentioning

confidence: 99%

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Liu

et al. 2020

Nanomaterials

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“…Likewise, Yumak et al investigated the effect of metal oxide loading and preparation method on the surface chemistry of C-TMO hybrid, by preparing MnO 2 /Activated Carbon (AC) and NiO/AC composites via hydrothermal and precipitation methods. [133] The study showed that the synthetic method for metal oxide loading has a significant influence on the C-TMO surface functional groups, specific surface area, thermal stability, and electrochemical properties. In particular, hybrid materials prepared via hydrothermal treatment have shown better electrochemical performances compared to those prepared through precipitation method.…”

Section: Modification Of Carbon For Better C-tmo Interaction and Tmo mentioning

confidence: 98%

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

Tomboc

Gadisa

Jun

et al. 2020

Chemistry An Asian Journal

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Supercapacitors store electrical energy by ion adsorption at the interface of the electrode-electrolyte (electric double layer capacitance, EDLC) or through faradaic process involving direct transfer of electrons via oxidation/ reduction reactions at one electrode to the other (pseudocapacitance). The present minireview describes the recent developments and progress of carbon-transition metal oxides (C-TMO) hybrid materials that show great promise as an efficient electrode towards supercapacitors among various material types. The review describes the synthetic methods and electrode preparation techniques along with the changes in the physical and chemical properties of each component in the hybrid materials. The critical factors in deriving both EDLC and pseudocapacitance storage mechanisms are also identified in the hope of pointing to the successful hybrid design principles. For example, a robust carbon-metal oxide interaction was identified as most important in facilitating the charge transfer process and activating high energy storage mechanism, and thus methodologies to establish a strong carbon-metal oxide contact are discussed. Finally, this article concludes with suggestions for the future development of the fabrication of high-performance C-TMO hybrid supercapacitor electrodes.[a] Dr.

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“…The electrodes were prepared by a thin film casting method as described in a previous study [23]. The as-synthesized AC samples (GAC, GAC-t, GAC1, GAC3, and GAC5)…”

Section: Fabrication Of Supercapacitor In Cr2032 Casingsmentioning

confidence: 99%

“…Although it is reported that the AC/metal composite may exhibit high transfer characteristics and effective catalytic/adsorptive properties [21,22], it is believed that the difficulty of keeping the metal in the zero-valent state on AC surface may be a reason for the limited number of papers. Especially the oxygen-containing surface functional groups on the AC surface have great influence on the oxidation of transition metals [23].…”

Section: Introductionmentioning

confidence: 99%

Surface and chemical characteristics of platinum modified activated carbon electrodes and their electrochemical performance

Yumak

Karabulut

2021

Turk J Chem

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Platinum (Pt) loaded activated carbons (ACs) were synthesized by the thermal decomposition of Platinum (II) acetylacetonate (Pt(acac)2) over chemically activated glucose-based biochar. The effect of Pt loading on surface area, pore characteristics, surface chemistry, chemical structure, and surface morphology were determined by various techniques. XPS studies proved the presence of metallic Pt 0 on the AC surface.The graphitization degree of Pt loaded ACs were increased with the loaded Pt 0 amount.The electrochemical performance of the Pt-loaded ACs (Pt@AC) was determined not only by the conventional three-electrode system but also by packaged supercapacitors in CR2032 casings. The capacitive performance of Pt@AC electrodes was investigated via 3 cyclic voltammetry (CV), galvanostatic charge-discharge curves (GCD), and impedance spectroscopy (EIS). It was found that the Pt loading increased the specific capacitance from F/g to 100 F/g. The ESR drop of the packaged cell decreased with the Pt loading due to the fast flow of charge through the conductive pathways. The results showed that the surface chemistry is more dominant than the surface area for determining the capacitive performance of Pt loaded AC-based packaged supercapacitors.

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Effect of synthesis methods on the surface and electrochemical characteristics of metal oxide/activated carbon composites for supercapacitor applications

Cited by 88 publications

References 56 publications

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

Surface and chemical characteristics of platinum modified activated carbon electrodes and their electrochemical performance

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