Post synthetic annealing of zeolitic imidazolate framework-67 for high-performance hybrid supercapacitors

Kale, Amol Marotrao; Manikandan, Ramu; Raj, C. Justin; Velayutham, Rajavel; Cho, Won-Je; Kim, Byung Chul

doi:10.1016/j.apsusc.2020.148716

Cited by 32 publications

(10 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6(d) displays the deconvoluted spectra of Co2p 3/2 the two peaks fitted at 781.2 and 785.4 eV, corresponds to Co-N x bond and their satellite peak, respectively. The obtained XPS results of ZIF-67 are in good agreement with the previous literatures [39,44].…”

Section: Morphologies and Compositionsupporting

confidence: 91%

In Situ Synthesis of ZIF-67 Thin Films Using Low Temperature Chemical Vapor Deposition to Fabricate All-Solid-State Flexible Interdigital in-Planar Microsupercapacitors

Anuratha

Cheng³

et al. 2023

International Journal of Energy Research

View full text Add to dashboard Cite

This work describes the fabrication of a flexible all-solid-state interdigital in-planar microsupercapacitor (μSC) using the in situ synthesized ZIF-67 thin films as the interdigital finger-electrode materials, platinum (Pt) thin film as the interdigital finger-electrode current collector, laser print technology for the fabrication of interdigital patterns, and low-cost commercial polyethylene terephthalate (PET) sheet as the flexible substrates, assembled with the NaOH/PVA gel electrolyte. ZIF-67 thin films are in situ synthesized onto PET substrate by ultralow temperature (ULT) chemical vapor deposition (CVD) technology at a low temperature of 140°C. We herein report the ULT CVD approach for gas phase synthesizing ZIF-67 thin films, the exactly heating temperature can produce vaporized water steam, sublimated 2-methylimidazole (2-MIM) and cobalt(II) acetylacetonate (Co(acac)2) vapors at the same time. The vaporized and sublimated gaseous precursors demonstrated molecular-level reactions, including the deprotonation of 2-MIM via water steam, and the following coordinated reactions with cobalt ions decomposed from Co(acac)2, for the efficiently straightforward deposition to form the uniform ZIF-67 thin films onto the substrate surface. Herein, the integration of pattern printing, CVD depositing ZIF-67 thin films, and lift-off patterning processes demonstrated a comprehensive achievement and good compatibility to integrate MOFs into miniaturized energy-storage devices.

show abstract

Section: Morphologies and Compositionsupporting

confidence: 91%

In Situ Synthesis of ZIF-67 Thin Films Using Low Temperature Chemical Vapor Deposition to Fabricate All-Solid-State Flexible Interdigital in-Planar Microsupercapacitors

Anuratha

Cheng³

et al. 2023

International Journal of Energy Research

View full text Add to dashboard Cite

show abstract

“…It is worth mentioning that heat treatment at different temperatures could lead to a variation of the real surface area by changing the grain size of the nanowires. This, in turn, could cause slight variation in the electrochemical activity of the electrodes annealed at different temperatures. , …”

Section: Resultsmentioning

confidence: 99%

“…This, in turn, could cause slight variation in the electrochemical activity of the electrodes annealed at different atures. 44,45 Further, to emphasize the importance of the presence of sodium in the structure of the substrate, we investigated the hydrogen evolution activity of a catalyst where the sodium in the substrate was replaced with hydrogen through ion exchange by immersing the substrate in a 0.1 M HCl solution for 1 h after the hydrothermal step. 32 After the ion exchange step, the substrate went through identical calcination and CBD processes.…”

Section: Catalytic Activity Of the Synthesized Electrodesmentioning

confidence: 99%

Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media

Amiri

Dondapati

Quintal

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A novel electrocatalyst with high activity and enhanced durability toward the hydrogen evolution reaction (HER) in alkaline media has been designed and fabricated based on sodium hexa-titanate (Na2Ti6O13) nanowires synthesized by a hydrothermal process and modified with Co(OH)2 quantum dots (QDs) by a facile chemical bath deposition (CBD) method. The current response of the developed Ti/Na2Ti6O13/Co(OH)2 nanocomposite electrode attained 10 mA cm–2 at an overpotential of 159 mV. The nanocomposite electrode exhibited a high stability at an applied current of 100 mA cm–2. The remarkable catalytic behavior was achieved with a loading amount of ca. 0.06 mg cm–2 cobalt hydroxide. This is attributed to the high electrochemically active surface area (EASA) gained by the nanowire-structured substrate and considerable enhancement of electrochemical conductivity with the use of Co(OH)2 quantum dots as an active material. The superior catalytic activity and high stability show that the developed catalyst is a promising candidate for hydrogen production in alkaline media.

show abstract

“…In particular, post-thermal synthesis was applied to ZIF-67 for modifying its surface texture and porosity. 127 The annealing of ZIF-67 with the thermal temperature of 300 °C (ZIF-67@300) revealed enhanced specific energy and specific power for hybrid supercapacitors. The sample exhibited high specific capacity, excellent stability, and better intercalation/deintercalation.…”

Section: Perspectivementioning

confidence: 99%

Strategies for induced defects in metal–organic frameworks for enhancing adsorption and catalytic performance

et al. 2022

View full text Add to dashboard Cite

show abstract

Post synthetic annealing of zeolitic imidazolate framework-67 for high-performance hybrid supercapacitors

Cited by 32 publications

References 60 publications

In Situ Synthesis of ZIF-67 Thin Films Using Low Temperature Chemical Vapor Deposition to Fabricate All-Solid-State Flexible Interdigital in-Planar Microsupercapacitors

In Situ Synthesis of ZIF-67 Thin Films Using Low Temperature Chemical Vapor Deposition to Fabricate All-Solid-State Flexible Interdigital in-Planar Microsupercapacitors

Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media

Strategies for induced defects in metal–organic frameworks for enhancing adsorption and catalytic performance

Contact Info

Product

Resources

About