2D-Ti3C2Tx MXene-supported Cu2S nanoflakes for supercapacitors and electrocatalytic oxygen evolution reaction

Gogoi, Debika; Karmur, Rajeshvari Samatbhai; Das, Manash R.; Ghosh, Narendra Nath

doi:10.1039/d3ta05104h

Cited by 6 publications

(2 citation statements)

References 74 publications

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“…PPy could be homogeneously distributed on the surface of BC through in situ polymerization and could provide pseudocapacitance when used as an electrode material. The synthesized PPy@BC nanofibers intercalate MXene nanoflakes and expand the interlayer spacing to construct a hierarchical frame conductive network with the assistance of the plunge-freezing method, which provides double-layer capacitance and pseudocapacitance. − Subsequently, more water molecules are accommodated into the MXene nanoflakes, which could turn into more small ice grains with a vertically aligned architecture for more developed porosity. Besides, the synthesized PPy@BC nanoparticles could even penetrate the MXene nanosheets with the assistance of small ice grains, which could significantly open up the stacked layers.…”

Section: Introductionmentioning

confidence: 99%

Multidimensional Nanostructural Engineering of MXene-Based Composite Films for High-Performance Supercapacitors

Li,

Xu,

Dai

et al. 2024

Energy Fuels

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Advanced two-dimensional (2D) MXenes have been extensively researched as electrode materials for flexible supercapacitors due to their excellent electronic performance and flexibility. Herein, a facile and effective approach is adopted to synthesize a polypyrrole@bacterial cellulose/MXene (PPy@BC/MXene) hybrid film through a plunge-freezing and vacuum-assisted filtration self-assembly strategy. We have constructed an ordered “building frame structure” with MXene as the “beam and slab” and polypyrrole@bacterial cellulose (PPy@BC) as the “pillar.” Benefiting from this vertical bridge, rapid interlaminar electroconductivity, unimpeded ion diffusion channels, and sufficient reactivity, the synthesized PPy@BC/MXene-25% electrode has achieved a high specific capacitance of 807 F g–1 at 0.05 mA cm–2 and a capacitance retention of 97.51% after 10 000 cycles at 20 mA cm–2. Besides, PPy@BC/MXene-25% exhibits high strain at break (∼10.8%) and high tensile strength (∼310 MPa). Moreover, the asymmetric microsupercapacitor PPy@BC/MXene-25%//MXene is assembled with PPy@BC/MXene-25% as the anode, which presents an average capacity of 464 F g–1 at 0.05 mA cm–2. The specific energy density of the PPy@BC/MXene-25%//MXene capacitor has achieved 135.3 μWh cm–2 at a power density of 435.4 μW cm–2 at 0.5 mA cm–2. The novel approach exploits a new way to design conductive freestanding flexible electrodes with significantly enhanced electrochemical properties.

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Section: Introductionmentioning

confidence: 99%

Multidimensional Nanostructural Engineering of MXene-Based Composite Films for High-Performance Supercapacitors

Li,

Xu,

Dai

et al. 2024

Energy Fuels

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“…Hydrogen production through water splitting driven by renewable energy, which does not cause environmental pollution problems, such as carbon emissions, is an important way to produce green hydrogen [3][4][5][6][7][8][9]. Water electrolysis technology usually includes hydrogen evolution reaction (HER) [10][11][12] and oxygen evolution reaction (OER) [13][14][15]. The OER involves a four-electron transfer process, resulting in slow reaction kinetics and high overpotential.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production via Electrolysis of Wastewater

Huang,

Fang,

Pan

et al. 2024

Nanomaterials

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The high energy consumption of traditional water splitting to produce hydrogen is mainly due to complex oxygen evolution reaction (OER), where low-economic-value O2 gas is generated. Meanwhile, cogeneration of H2 and O2 may result in the formation of an explosive H2/O2 gas mixture due to gas crossover. Considering these factors, a favorable anodic oxidation reaction is employed to replace OER, which not only reduces the voltage for H2 production at the cathode and avoids H2/O2 gas mixture but also generates value-added products at the anode. In recent years, this innovative strategy that combines anodic oxidation for H2 production has received intensive attention in the field of electrocatalysis. In this review, the latest research progress of a coupled hydrogen production system with pollutant degradation/upgrading is systematically introduced. Firstly, wastewater purification via anodic reaction, which produces free radicals instead of OER for pollutant degradation, is systematically presented. Then, the coupled system that allows for pollutant refining into high-value-added products combined with hydrogen production is displayed. Thirdly, the photoelectrical system for pollutant degradation and upgrade are briefly introduced. Finally, this review also discusses the challenges and future perspectives of this coupled system.

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Fabrication of structural supercapacitor device with CNT grown stainless steel mesh embedded in carbon-reinforced polyethylene composite

Soni,

Arya,

Avasthi

et al. 2024

Journal of Energy Storage

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2D-Ti₃C₂T_x MXene-supported Cu₂S nanoflakes for supercapacitors and electrocatalytic oxygen evolution reaction

Abstract: In recent times, the design of efficient multifunctional materials for supercapacitors and oxygen evolution reaction (OER) has become very imperative in the field of energy storage and conversion. In the...

Cited by 6 publications

References 74 publications

Multidimensional Nanostructural Engineering of MXene-Based Composite Films for High-Performance Supercapacitors

Multidimensional Nanostructural Engineering of MXene-Based Composite Films for High-Performance Supercapacitors

Hydrogen Production via Electrolysis of Wastewater

Fabrication of structural supercapacitor device with CNT grown stainless steel mesh embedded in carbon-reinforced polyethylene composite

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