Hydrothermal and peat-derived carbons as electrode materials for high-efficient electrical double-layer capacitors

Härmas, Meelis; Palm, Rasmus; Thomberg, Thomas; Härmas, Riinu; Koppel, Miriam; Paalo, Maarja; Tallo, Indrek; Romann, Tavo; Jänes, Alar; Lust, Enn

doi:10.1007/s10800-019-01364-5

Cited by 19 publications

(17 citation statements)

References 80 publications

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“…Graphene has recently been suggested as a sustainable material for super-capacitor application [149], and two graphene super-capacitor implementation studies with a specific capacity of 135 Fg −1 in aqueous electrolyte and 117 Fg −1 in aqueous H 2 SO 4 [139,150] based on a multi-sheeted graphene matrix have been recorded. The effective size of graphene parts as condenser electrode parts does not depend on the distribution of solid-state pores, unlike conventional high-surface products [139] which is distinct from the present super-capacitors made of activated carbon and carbon nanotube [146,151,152]. Definitely, the effective surface area of graphene materials should be highly dependent on the substrates, i.e.…”

Section: Transition Metal Oxides-graphene Compositesmentioning

confidence: 95%

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

Hussain

Ihrar

et al. 2020

SN Appl. Sci.

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Two-dimensional (2D) graphene and its outstanding properties such as, enormous conductivities, mechanical strength, optical and electrical properties brought it one of the most studied materials for the production of energy using renewable resources. The composites of graphene with the same morphological materials such as layered transition metal oxides will be the most aspiring combination to boost their conducting, optoelectronic and mechanical properties. Furthermore, the transition metal chalcogenides materials attracted significant attention due to their atomically thin layers and enormous optical, conducting and electrical properties. The layered materials offer mostly atomically thin 2D plane to the charge carrier with superior conducting properties. The thickness at atomic level, band gap, spin orbit coupling electronic and optoelectronics properties of transition metal dichalcogenides makes them one of the promising entities in energy harvesting technologies. The review suggests some strategies to improve the transition metals-composites stability conducting properties to be tailored in various applications.

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Section: Transition Metal Oxides-graphene Compositesmentioning

confidence: 95%

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

Hussain

Ihrar

et al. 2020

SN Appl. Sci.

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“…The received carbons were marked with the abbreviations: C-2(KOH) and C-2(ZnCl 2 ), respectively [9,[24][25][26].…”

Section: Synthesis Of Peat-derived Carbonsmentioning

confidence: 99%

“…In recent years, biomass has been studied as a precursor for the synthesis of advanced carbonaceous materials for different applications like wastewater purification from various metals [2][3][4] and low-temperature fuel cells [5,6]. Furthermore, using a carbonization process, peat-derived carbon (PDC) can be used for various applications, such as battery electrodes, adsorbents, and electrical double-layer capacitor electrodes [7][8][9][10]. Regarding low-temperature fuel cells, carbonaceous materials are already being widely used as catalyst-support materials [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Cobalt and Nitrogen Co-Doped Peat-Derived Carbon Catalysts for Oxygen Reduction in Acidic Media

et al. 2021

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In this study, several peat-derived carbons (PDC) were synthesized using various carbonization protocols. It was found that depending on the carbonization method, carbons with very different surface morphologies, elemental compositions, porosities, and oxygen reduction reaction (ORR) activities were obtained. Five carbons were used as carbon supports to synthesize Co-N/PDC catalysts, and five different ORR catalysts were acquired. The surface analysis revealed that a higher nitrogen content, number of surface oxide defects, and higher specific surface area lead to higher ORR activity of the Co-N/PDC catalysts in acidic solution. The catalyst Co-N/C-2(ZnCl2), which was synthesized from ZnCl2-activated and pyrolyzed peat, showed the highest ORR activity in both rotating disk electrode and polymer electrolyte membrane fuel cell tests. A maximum power density value of 210 mW cm−2 has been obtained. The results of this study indicate that PDCs are promising candidates for the synthesis of active non-platinum group metal type catalysts.

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“…The main drawback of these materials is that they have relatively low specific capacitance. On contrary, pseudocapacitors have greater specific capacitance due to the occurrence of high charge storage redox reactions on electrodes [11][12][13] .…”

mentioning

confidence: 99%

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

Isacfranklin

Yuvakkumar

Ravi

et al. 2020

Sci Rep

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The growth in energy devices and the role of supercapacitors are increasingly important in today’s world. Designing an electrode material for supercapacitors using metals that have high performance, superior structure, are eco-friendly, inexpensive and highly abundant is essentially required for commercialization. In this point of view, quaternary chalcogenide Cu2NiSnS4 with fascinating marigold flower like microstructured electrodes are synthesized using different concentrations of citric acid (0, 0.05 M, 0.1 M and 0.2 M) by employing solvothermal method. The electrode materials physicochemical characteristics are deliberated in detail using the basic characterization techniques. The electrochemical studies revealed better electrochemical performances, in particular, Cu2NiSnS4@0.1 M-CA electrode revealed high 1029 F/g specific capacitance at 0.5 A/g current density. Further, it retained 78.65% capacity over 5000 cycles. To prove the practical applicability, a full-cell asymmetric solid-state device is fabricated, and it delivered 41.25 Wh/Kg and 750 Wh/Kg energy and power density at 0.5 A/g. The optimum citric acid added Cu2NiSnS4 electrode is shown to be a promising candidate for supercapacitor applications.

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Hydrothermal and peat-derived carbons as electrode materials for high-efficient electrical double-layer capacitors

Cited by 19 publications

References 80 publications

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

Synthesis and Characterization of Cobalt and Nitrogen Co-Doped Peat-Derived Carbon Catalysts for Oxygen Reduction in Acidic Media

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

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