Electrochemical charge storage performance of in-situ etched carbonized ZIF-8 aerogels

Tathagata Kar; Maura Casales-Díaz; Socorro Valdez Rodríguez; Mohan Kumar Kesarla

doi:10.1016/j.matlet.2023.133847

Electrochemical charge storage performance of in-situ etched carbonized ZIF-8 aerogels

Tathagata Kar^*, Maura Casales-Díaz, Socorro Valdez Rodríguez, Mohan Kumar Kesarla

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Light-weight, porous carbon-based aerogels are one of the widely investigated materials for energy applications. Herein, we report the synthesis and characterizations of a carbonized aerogel prepared from zeolitic imidazolate framework (ZIF-8) particles and polymer agar. Noticeably, the agar matrix not only allows a uniform dispersion of the ZIF-8 but also initiates the formation of hollow ZIF-8 via partial etching of its core. The distinct well-distributed hollow ZIF-8 imparts high porosity, excellent surface area (1206 m² g⁻¹) and predominant amorphous phase to the carbonized aerogel framework. The estimated maximum specific capacitance (124.86 F g⁻¹ at 0.25 A g⁻¹) obtained with the carbonized ZIF-8 aerogel is mainly attributed to the hollow ZIF-8 particles with reduced Zn-content and KOH activation.

Original language	English
Article number	133847
Journal	Materials Letters
Volume	336
DOIs	https://doi.org/10.1016/j.matlet.2023.133847
State	Published - 1 Apr 2023
Externally published	Yes

Keywords

Carbon aerogel
Electrochemical capacitance
Hollow ZIF-8
In-situ etching

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10.1016/j.matlet.2023.133847

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title = "Electrochemical charge storage performance of in-situ etched carbonized ZIF-8 aerogels",

abstract = "Light-weight, porous carbon-based aerogels are one of the widely investigated materials for energy applications. Herein, we report the synthesis and characterizations of a carbonized aerogel prepared from zeolitic imidazolate framework (ZIF-8) particles and polymer agar. Noticeably, the agar matrix not only allows a uniform dispersion of the ZIF-8 but also initiates the formation of hollow ZIF-8 via partial etching of its core. The distinct well-distributed hollow ZIF-8 imparts high porosity, excellent surface area (1206 m2 g−1) and predominant amorphous phase to the carbonized aerogel framework. The estimated maximum specific capacitance (124.86 F g−1 at 0.25 A g−1) obtained with the carbonized ZIF-8 aerogel is mainly attributed to the hollow ZIF-8 particles with reduced Zn-content and KOH activation.",

keywords = "Carbon aerogel, Electrochemical capacitance, Hollow ZIF-8, In-situ etching",

author = "Tathagata Kar and Maura Casales-D{\'i}az and Rodr{\'i}guez, {Socorro Valdez} and Kesarla, {Mohan Kumar}",

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doi = "10.1016/j.matlet.2023.133847",

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T1 - Electrochemical charge storage performance of in-situ etched carbonized ZIF-8 aerogels

AU - Kar, Tathagata

AU - Casales-Díaz, Maura

AU - Rodríguez, Socorro Valdez

AU - Kesarla, Mohan Kumar

PY - 2023/4/1

Y1 - 2023/4/1

N2 - Light-weight, porous carbon-based aerogels are one of the widely investigated materials for energy applications. Herein, we report the synthesis and characterizations of a carbonized aerogel prepared from zeolitic imidazolate framework (ZIF-8) particles and polymer agar. Noticeably, the agar matrix not only allows a uniform dispersion of the ZIF-8 but also initiates the formation of hollow ZIF-8 via partial etching of its core. The distinct well-distributed hollow ZIF-8 imparts high porosity, excellent surface area (1206 m2 g−1) and predominant amorphous phase to the carbonized aerogel framework. The estimated maximum specific capacitance (124.86 F g−1 at 0.25 A g−1) obtained with the carbonized ZIF-8 aerogel is mainly attributed to the hollow ZIF-8 particles with reduced Zn-content and KOH activation.

AB - Light-weight, porous carbon-based aerogels are one of the widely investigated materials for energy applications. Herein, we report the synthesis and characterizations of a carbonized aerogel prepared from zeolitic imidazolate framework (ZIF-8) particles and polymer agar. Noticeably, the agar matrix not only allows a uniform dispersion of the ZIF-8 but also initiates the formation of hollow ZIF-8 via partial etching of its core. The distinct well-distributed hollow ZIF-8 imparts high porosity, excellent surface area (1206 m2 g−1) and predominant amorphous phase to the carbonized aerogel framework. The estimated maximum specific capacitance (124.86 F g−1 at 0.25 A g−1) obtained with the carbonized ZIF-8 aerogel is mainly attributed to the hollow ZIF-8 particles with reduced Zn-content and KOH activation.

KW - Carbon aerogel

KW - Electrochemical capacitance

KW - Hollow ZIF-8

KW - In-situ etching

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Electrochemical charge storage performance of in-situ etched carbonized ZIF-8 aerogels

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Keywords

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