Mille-feuille-like heterostructures through in situ cross-linking approach for high power density supercapacitor

Lee, Chang‐Soo; Kim, Na Un; Min, Hyo Jun; Kang, Miso; Kim, Jong Hak

doi:10.1016/j.cej.2021.128750

Cited by 7 publications

(3 citation statements)

References 55 publications

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“…Electrochemical impedance spectroscopy (EIS) of the electrodes was conducted with an amplitude of 10 mV and an applied AC signal in the frequency range from 10 kHz to 0.001 Hz. The specific capacitance (Cs) was calculated from the GCD curves using the following equation 7,48 :…”

Section: Three-electrode Cell Configurationsmentioning

confidence: 99%

Ion‐exchange synthesis of microporous Co ₃ S ₄ for enhanced electrochemical energy storage

Ansari

Kim

2021

Intl J of Energy Research

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Replacing oxygen in an oxide-based material with sulfur can produce improved flexibility and more efficient electron transport in its structure leading to enhanced electrical performance. Herein, facile template-free growth of free-standing cobalt (II, III) oxide (Co 3 O 4 ) on Ni foam via a mild hydrothermal technique followed by its transformation to cobalt (II, III) sulfide (Co 3 S 4 ) via an ion-exchange is reported. The microstructural morphology, phase, and porosity of the prepared Co 3 O 4 and Co 3 S 4 are characterized by FESEM, XRD, Raman, XPS, TEM, and BET analyses. The electrochemical performance of the Co 3 S 4 film with a microporous morphology is considerably superior to that of Co 3 O 4 , exhibiting a high specific capacitance of 1604 F g À1 (905 F g À1 for Co 3 O 4 ), the excellent restorative ability of $99% at 1 A g À1 ($96% for Co 3 O 4 ), and

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Section: Three-electrode Cell Configurationsmentioning

confidence: 99%

Ion‐exchange synthesis of microporous Co ₃ S ₄ for enhanced electrochemical energy storage

Ansari

Kim

2021

Intl J of Energy Research

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“…Poly(glycidyl methacrylate)-co-poly(oxyethylene methacrylate) (PGMA-co-POEM; simply PGPO) was synthesized via one-pot free-radical polymerization and used as the polymeric template. The comb copolymer template provided epoxy-hydroxyl crosslinking in the PGMA domain as well as metal coordination in the hydrophilic POEM domain . By combining this template with a hydrophilic Ti precursor, hierarchically layered nanoisland structures could be created.…”

Section: Introductionmentioning

confidence: 99%

“…The comb copolymer template provided epoxy-hydroxyl crosslinking in the PGMA domain as well as metal coordination in the hydrophilic POEM domain. 24 By combining this template with a hydrophilic Ti precursor, hierarchically layered nanoisland structures could be created. Furthermore, self-assembly of the PGPO copolymer produced a mesoporous architecture while maintaining superior interconnectivity.…”

Section: Introductionmentioning

confidence: 99%

Comb Copolymer Templates for Interconnected, Hierarchically Porous TiO₂ Nanoisland Photocatalytic Membranes

Lee

Jang

Kim

et al. 2022

ACS Appl. Polym. Mater.

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Pluronic block copolymers have been most widely used as templates for porous TiO 2 photocatalytic structures, but small pores are formed, reducing water permeability. Herein, a comb copolymer, poly(glycidyl methacrylate)-co-poly(oxyethylene methacrylate) (PGMA-co-POEM; simply PGPO), was synthesized through free-radical polymerization and used as a template for hierarchically porous TiO 2 (hp-TiO 2 ) nanoislands on porous Al 2 O 3 membranes via a sol−gel, spin-coating process. The PGPO comb copolymer exhibited self-assembled, microphase-separated morphology, leading to a mesoporous TiO 2 architecture with superior interconnectivity. In situ epoxy-hydroxyl crosslinking and selective coordination of the TiO 2 precursor to the hydrophilic chains of the PGPO copolymer resulted in the development of hp-TiO 2 nanoislands. The layer-by-layer morphology ensured excellent photocatalytic ability for the degradation of contaminants associated with organic dye compounds upon UV irradiation (removal efficiency >90%). Organic fouling due to the dye compounds was further significantly reduced with the hp-TiO 2 membrane (flux decline ∼10%) as compared to the case of a porous TiO 2 (p-TiO 2 ) membrane (removal efficiency ∼50%; flux decline ∼30%). Furthermore, the water permeability of hp-TiO 2 nanoisland membranes was greater than those of membranes prepared using Pluronic P123, which is attributed to the self-assembly, microphase-separated structure and high molecular weight of the PGPO comb copolymer.

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Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

et al. 2022

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Heterostructures based on covalent organic frameworks (COFs) and conductive materials have attracted more attentions to effectively apply COF‐related materials for supercapacitor. Here, the as‐prepared amino‐modified Ti3C2 MXene nanosheets are adopted to support the in‐situ growth of anthraquinone‐based COFs (AQ‐COF) to fabricate the heterostructures of COFs uniformly dispersed on surface of MXene, based on the covalent interaction between terminal C=O groups of COFs and amino units of MXene. Besides, the morphology and porous structures of COF@MXene heterostructures are optimized by controlling the amounts of MXene nanosheets. Combining the superiority from the two‐dimensional structure with high conductivity of MXene and porous structure with abundant redox‐active groups inherited from AQ‐COF, the COF@MXene‐15 heterostructure electrode delivers large surface area with optimal porous structures, leading to the maximally‐activated C=O units for charge‐storage and capacitance‐controlled electrochemical kinetics. Improved specific capacitance (290 F g−1 at 0.5 A g−1) and rate capability can be achieved for the COF@MXene‐15 heterostructure as the electrode for supercapacitor in Na2SO4 electrolyte. It is the first time to report the heterostructure of COFs and MXene as the electrode for supercapacitor, and this work would promote further application of COFs and related materials for other energy‐storage systems.

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Mille-feuille-like heterostructures through in situ cross-linking approach for high power density supercapacitor

Cited by 7 publications

References 55 publications

Ion‐exchange synthesis of microporous Co ₃ S ₄ for enhanced electrochemical energy storage

Ion‐exchange synthesis of microporous Co ₃ S ₄ for enhanced electrochemical energy storage

Comb Copolymer Templates for Interconnected, Hierarchically Porous TiO₂ Nanoisland Photocatalytic Membranes

Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

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Mille-feuille-like heterostructures through in situ cross-linking approach for high power density supercapacitor

Cited by 7 publications

References 55 publications

Ion‐exchange synthesis of microporous Co 3 S 4 for enhanced electrochemical energy storage

Ion‐exchange synthesis of microporous Co 3 S 4 for enhanced electrochemical energy storage

Comb Copolymer Templates for Interconnected, Hierarchically Porous TiO2 Nanoisland Photocatalytic Membranes

Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

Contact Info

Product

Resources

About

Ion‐exchange synthesis of microporous Co ₃ S ₄ for enhanced electrochemical energy storage

Ion‐exchange synthesis of microporous Co ₃ S ₄ for enhanced electrochemical energy storage

Comb Copolymer Templates for Interconnected, Hierarchically Porous TiO₂ Nanoisland Photocatalytic Membranes