High energy and excellent stability asymmetric supercapacitor derived from sulphur-reduced graphene oxide/manganese dioxide composite and activated carbon from peanut shell

Tarimo, Delvina Japhet; Oyedotun, Kabir O.; Mirghni, Abdulmajid Abdallah; Sylla, Ndeye Fatou; Manyala, Ncholu I.

doi:10.1016/j.electacta.2020.136498

Cited by 47 publications

(19 citation statements)

References 48 publications

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“…Recently, many non-noble pseudocapacitive electromaterials, especially phosphate electromaterials (e.g., Am Fe–Co 3 (PO 4 ) 2 , Ni–Co–TEP, Ni–Co hydrogen phosphate, Mn 3 (PO 4 ) 2 ·3H 2 O, Co 3 (PO 4 ) 2 ·8H 2 O, and Fe–InPO 4 ), also show the excellent OER property in the alkaline system because their electrochemical mechanisms both involve the high-efficiency charge transfer by activated metal elements and then undergo different redox reactions with the different applied potentials. , Thus, there are the same effect factors (e.g., morphology, conductivity, and porosity) for electromaterials in capacity and OER, and the abovementioned property could be improved by various physicochemical means (e.g., compositing other functional materials, doping heteroatom, ,, controlling the ratio of different transition metals, , and ultrasonic treatment). However, different from the simple redox energy-storage mechanism of the battery-type and pseudocapacitive electromaterials, OER is a more complex electrochemical reaction, which involves more electron transfer processes and the desorption of active species, , resulting in a possible result that the greater capacity of the electromaterial may not be indicating the stronger OER property.…”

Section: Introductionmentioning

confidence: 99%

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Recently, design of cost-effective multifunctional electromaterials for supercapacitors and oxygen evolution reaction (OER) and enhancing their functionalities have become an emphasis in energy storage and conversion. Herein, a series of cheap and functional phosphate composites with different ratios of cobalt and nickel are synthesized using a simple polyalcohol refluxing method, and their excellent capacity and OER properties are systematically studied. Notably, owing to the different major role of Co and Ni elements in the phosphate composites for capacity and OER, the optimal electroconductibility, structural adjustment, electrochemical active sites, and activities for capacity and OER are obtained from the composites with the different ratios of Co/Ni. In addition, using high-capacity BiPO4 (BPO) as the negative electrodes, the new type of all-phosphate asymmetric supercapacitor (CNPO-40//BPO) shows a high energy density and reaches 36.84 W h kg–1 at a power density of 254.52 W kg–1. Its cyclic stability is also more excellent than that of the CNPO-40//AC device using commercial activated carbon as the negative electrodes. This study is beneficial to the more in-depth research on efficient dual-function electromaterials in capacity and OER and provides a high-efficient way to improve the practicality of asymmetric supercapacitors using the high-capacity Bi-based electromaterials as the negative electrodes.

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Section: Introductionmentioning

confidence: 99%

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…As exhibited in the Ragone plots, these values also outperform most of aqueous ZHSs and represent the best power density for all zinc-ion energy storage devices that have been reported so far (Fig. 3i and Table S2) [16,18,28,[31][32][33][34][35][36][37][38]. We also compared other types of supercapacitors in Table S3, showing that ZHSs possess both high security and competitive electrochemical performance [39][40][41][42][43].…”

Section: Resultsmentioning

confidence: 62%

Self-assembled carbon nanoribbons with the heteroatom doping used as ultrafast charging cathodes in zinc-ion hybrid supercapacitors

Huang

Kang

et al. 2022

Sci. China Mater.

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Zinc-ion hybrid supercapacitors (ZHSs) are highly desirable for large-scale energy storage applications owing to the merits of high safety, low cost and ultra-long cycle life. The poor rate performance of cathodes, however, severely hinders their application. Herein, aqueous ZHSs with superior performance were fabricated by employing a series of ultrathin carbon nanobelts modified with B, N, O (CPTHB-Bx). The heteroatom doping can significantly modify the chemical behaviors of carbon frameworks, which could generate numerous active sites and accelerate the charge transport. The systematic investigation reveals that the B–N groups are active species for fast Zn-ion adsorption and desorption. As a result, the best-performed CPTHB-B2 exhibits an excellent electrochemical performance as cathodes in ZHSs, delivering a high specific capacitance of 415.3 F g−1 at 0.5 A g−1, a record high capacitance retention of 81% when increasing the current densities from 0.5 to 100 A g−1, an outstanding energy density of 131.9 W h kg−1 and an exceptionally high power density of 42.1 kW kg−1. Our work provides a new cathode design for ultrafast charging Zn-ion storage devices.

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“…The characterization of the materials as electrodes for supercapacitor application was evaluated by cyclic voltammetry (CV) and galvanostatic charge discharge (CD) curves. By using three electrodes system the electrodes of the supercapacitor, the calculation was done based on the following equations [3,[65][66][67];…”

Section: The Electrochemical Characterization Of Activated Carbonmentioning

confidence: 99%

“…This is capable of forming more redox-active sites, which can enhance the performance of the electrode. Sulphur also improves the stability, electrical and surface properties and the electrode materials' wettability, hence exhibiting high retention and high charge/discharge cycle stability [3]. The functional groups have specific effects.…”

Section: The Electrochemical Characterization Of Activated Carbonmentioning

confidence: 99%

“…This can also be achieved by exploring electrolytes with large potential windows such as ionic or organic electrolytes. Depending on the charge storage mechanisms of the active materials used, the electrochemical systems (EC) can be generally classified into two types, namely electric double-layer capacitors based on ion adsorption (EDLCs mainly carbonaceous material with a high surface area) and pseudocapacitors (including redox material such as transition metal oxides and conducting polymers) [3]. Pseudocapacitors have been shown to exhibit much higher capacitance than the EDLCs and are either used to complement EDLCs to improve the power and energy densities [4].…”

Section: Introductionmentioning

confidence: 99%

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Modified Activation Process for Supercapacitor Electrode Materials from African Maize Cob

et al. 2020

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In this work, African maize cobs (AMC) were used as a rich biomass precursor to synthesize carbon material through a chemical activation process for application in electrochemical energy storage devices. The carbonization and activation were carried out with concentrated Sulphuric acid at three different temperatures of 600, 700 and 800 °C, respectively. The activated carbon exhibited excellent microporous and mesoporous structure with a specific surface area that ranges between 30 and 254 m2·g−1 as measured by BET analysis. The morphology and structure of the produced materials are analyzed through Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Boehm titration, X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy. X-ray photoelectron spectroscopy indicates that a considerable amount of oxygen is present in the materials. The functional groups in the activated carbon enhanced the electrochemical performance and improved the material’s double-layer capacitance. The carbonized composite activated at 700 °C exhibited excellent capacitance of 456 F g−1 at a specific current of 0.25 A g−1 in 6 M KOH electrolyte and showed excellent stability after 10,000 cycles. Besides being a low cost, the produced materials offer good stability and electrochemical properties, making them suitable for supercapacitor applications.

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High energy and excellent stability asymmetric supercapacitor derived from sulphur-reduced graphene oxide/manganese dioxide composite and activated carbon from peanut shell

Cited by 47 publications

References 48 publications

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Self-assembled carbon nanoribbons with the heteroatom doping used as ultrafast charging cathodes in zinc-ion hybrid supercapacitors

Modified Activation Process for Supercapacitor Electrode Materials from African Maize Cob

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