MnO2 and biomass-derived 3D porous carbon composites electrodes for high performance supercapacitor applications

Yang, Guijun; Park, Soo‐Jin

doi:10.1016/j.jallcom.2018.01.108

Cited by 126 publications

(48 citation statements)

References 48 publications

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“…The XPS spectrum of Figure 1a indicates the existence of Mn, O and C, and the peak intensity of Mn2p and O1s increases with the increase of MO content (Table 1). When spin energy was used to separate 11.6 eV, characteristic peaks of Mn2p 1/2 (653.8 eV) and Mn2p 3/2 (642.2 eV) appeared, indicating that MO was successfully coated on the AM1 composites [28,29]. The O1s XPS spectrum of AC, AM1 is shown in Figure 1c.…”

Section: Structural Propertiesmentioning

confidence: 99%

Activated Carbon/MnO2 Composites as Electrode for High Performance Supercapacitors

et al. 2020

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Activated carbon (AC) was synthesized with various weight ratios of manganese dioxide (MO) through a simple hydrothermal approach. The electrochemical performance of the synthesized activated carbon/MnO2 composites was investigated. The effect of the activated carbon/MnO2 (AM) ratio on the electrochemical properties of the activated carbon/MnO2 composites and the pore structure was also examined. The results show that the specific capacitance of the activated carbon material has been improved after the addition of MO. The as-synthesized composite material exhibits specific capacitance of 60.3 F g−1 at 1 A g−1, as well as stable cycle performance and 99.6% capacitance retention over 5000 cycles.

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Section: Structural Propertiesmentioning

confidence: 99%

Activated Carbon/MnO2 Composites as Electrode for High Performance Supercapacitors

et al. 2020

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“…Three-dimensional ZnFe2O4@MnO2 hierarchical core/shell nanosheet arrays as battery-type electrode exhibit high capacity of 1084 C g -1 at current density of 2 A g -1 with coulombic efficiency of 96.1% after 5000 cycles [12]. Recent MnO2-based composites including MnO2/carbon, MnO2/graphene, MnO2 nanowires@Ni1-xCoxOy heterostructures, CoMoO4@C@MnO2 core-shell structures and MnO2/carbonized cotton textile hybrids have been developed as electrodes in supercapacitors [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of nanosized MnO2 synthesized by redox route using biological reducing agents

Abuzeid

Hashem

Kaus

et al. 2018

Journal of Alloys and Compounds

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For more than a century, manganese dioxides (MDOs) have been used as electrochemically active materials in energy storage and conversion applications. To reduce the cost and hazardous impact of synthesis, a redox method was used to prepare MnO2 using extracts of green (GT-MnO2) and black (BT-MnO2) tea as biological reducing agents. Polyphenols present in the extracts of tea not only reduce Mn 7+ ions but also act as "capping agents" to stabilize and prevent the produced MnO2 nanoparticles from degradation and aggregation. Elemental, structural properties and morphology of nanosized α-KxMnO2 were studied by thermogravimetric analysis, X-ray powder diffraction and Raman spectroscopy, which revealed the different crystallinity between GT-MnO2 and BT-MnO2 due to the strength of the antioxidant species. Electrochemical investigations highlight the beneficial presence of K + ions in (2×2) tunnels; with a higher concentration, α-K0.135MnO2 exhibits a discharge specific capacity of 155 mAh g-1 after 20 cycles at C/26 rate.

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“…However, because of the limitations of the equipment and the process itself, it is difficult to control the particle size, purity, and morphology of powder using the solid phase method [6,7,8,9,10]. The liquid phase method mainly includes the precipitation [11,12,13], hydrothermal [14,15,16], colloidal [17,18,19], and sol-gel methods [20,21,22]. The advantages of the liquid phase method are convenient operation, simple synthesis process, and controllable particle size.…”

Section: Introductionmentioning

confidence: 99%

Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review

2019

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With the continuous development and progress of materials science, increasingly more attention has been paid to the new technology of powder synthesis and material preparation. The hydrothermal method is a promising liquid phase preparation technology that has developed rapidly during recent years. It is widely used in many fields, such as the piezoelectric, ferroelectric, ceramic powder, and oxide film fields. The hydrothermal method has resulted in many new methods during the long-term research process, such as adding other force fields to the hydrothermal condition reaction system. These force fields mainly include direct current, electric, magnetic (autoclaves composed of non-ferroelectric materials), and microwave fields. Among them, the microwave hydrothermal method, as an extension of the hydrothermal reaction, cleverly uses the microwave temperature to compensate for the lack of temperature in the hydrothermal method, allowing better practical application. This paper reviews the development of the hydrothermal and microwave hydrothermal methods, introduces their reaction mechanisms, and focuses on the practical application of the two methods.

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MnO2 and biomass-derived 3D porous carbon composites electrodes for high performance supercapacitor applications

Cited by 126 publications

References 48 publications

Activated Carbon/MnO2 Composites as Electrode for High Performance Supercapacitors

Activated Carbon/MnO2 Composites as Electrode for High Performance Supercapacitors

Electrochemical performance of nanosized MnO2 synthesized by redox route using biological reducing agents

Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review

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