Quantum Capacitance through Molecular Infiltration of 7,7,8,8-Tetracyanoquinodimethane in Metal–Organic Framework/Covalent Organic Framework Hybrids

Peng, Haijun; Huang, Senhe; Tranca, Diana; Richard, Fanny; Baaziz, Walid; Zhuang, Xiaodong; Samorı́, Paolo; Ciesielski, Artur

doi:10.1021/acsnano.1c09146

Cited by 38 publications

(21 citation statements)

References 70 publications

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“…The capacitance of the carbon cathode consists of two parts: electric double-layer capacitance (EDLC) and pseudocapacitance (Faradaic redox reactions between the electroactive substance on the carbon surface and the electrolyte) [ 9 , 10 ]. So far, a variety of carbon cathodes have been developed around these two perspectives to increase the energy density of the ZIHCs, such as activated carbon with large specific surface area [ 11 , 12 ], porous carbon with rich microporous structure [ 13 , 14 ], and heteroatom-modified carbon with pseudocapacitive active [ 15 – 17 ].…”

Section: Introductionmentioning

confidence: 99%

Enabling Multi-Chemisorption Sites on Carbon Nanofibers Cathodes by an In-situ Exfoliation Strategy for High-Performance Zn–Ion Hybrid Capacitors

Lian

Chen

et al. 2022

Nano-Micro Lett.

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Carbon nanofibers films are typical flexible electrode in the field of energy storage, but their application in Zinc-ion hybrid capacitors (ZIHCs) is limited by the low energy density due to the lack of active adsorption sites. In this work, an in-situ exfoliation strategy is reported to modulate the chemisorption sites of carbon nanofibers by high pyridine/pyrrole nitrogen doping and carbonyl functionalization. The experimental results and theoretical calculations indicate that the highly electronegative pyridine/pyrrole nitrogen dopants can not only greatly reduce the binding energy between carbonyl group and Zn2+ by inducing charge delocalization of the carbonyl group, but also promote the adsorption of Zn2+ by bonding with the carbonyl group to form N–Zn–O bond. Benefit from the multiple highly active chemisorption sites generated by the synergy between carbonyl groups and pyridine/pyrrole nitrogen atoms, the resulting carbon nanofibers film cathode displays a high energy density, an ultralong-term lifespan, and excellent capacity reservation under commercial mass loading (14.45 mg cm‒2). Particularly, the cathodes can also operate stably in flexible or quasi-solid devices, indicating its application potential in flexible electronic products. This work established a universal method to solve the bottleneck problem of insufficient active adsorption sites of carbon-based ZIHCs.Imoproved should be changed into Improved.

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Section: Introductionmentioning

confidence: 99%

Enabling Multi-Chemisorption Sites on Carbon Nanofibers Cathodes by an In-situ Exfoliation Strategy for High-Performance Zn–Ion Hybrid Capacitors

Lian

Chen

et al. 2022

Nano-Micro Lett.

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“…Uniform pores enhanced the diffusion of ions and redox-active sites obtained with the introduction of TCNQ molecule enhanced the quantum capacitance of the resulting hybrid material which exhibited an excellent supercapacitor performance. 68 Another energy storage application of MOF/COF hybrids is lithium-sulfur (Li-S) batteries, which consist of a Li anode and an S cathode. Li-S batteries are promising battery types due to their high energy densities.…”

Section: Energy Storagementioning

confidence: 99%

MOF/COF hybrids as next generation materials for energy and biomedical applications

2022

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“…For example, hydrophobic core–shell structured MOFs@COFs composites, such as NH 2 -MIL-101(Fe)@NTU-COF and Ti-MOFs@DM-LZU1 have been successfully synthesized and applied to elevate the catalysis efficiency. The formed hybrid materials by controllable growth of COF shell on MOFs led to significantly improved performance. − The application of the cooperative effect of MOFs and COFs on humidity-independent gas detection has not been reported before.…”

Section: Introductionmentioning

confidence: 99%

Humidity-Independent Artificial Olfactory Array Enabled by Hydrophobic Core–Shell Dye/MOFs@COFs Composites for Plant Disease Diagnosis

Wang

et al. 2022

ACS Nano

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As a class of important artificial olfactory system, the colorimetric sensor array possesses great potential for commercialization due to its cost-effectiveness and portability. However, when applied to practical applications, the humidity interference from ambient environment and dissatisfactory sensitivity for trace target VOCs are largely unsolved problems. To overcome the problems, we developed a series of dye/MOFs@COFs gas-sensing materials with core–shell structure using a hydrophobization strategy by encapsulation of dye/metal–organic frameworks (MOFs) into hydrophobic covalent organic frameworks (COFs). Benefiting from the hydrophobic property of the COF shell, the dye/MOFs@COFs composites were endowed with excellent humidity-resistance even under 100% relative humidity (RH). Moreover, due to the uniform distribution of dyes on the porous MOFs, the dye/MOFs@COFs sensors also exhibited improved sensitivity at the sub-ppm level, compared with conventional dye sensors. On basis of the excellent humidity-resistance and improved sensitivity, an artificial olfactory array based on dye/MOFs@COFs composites was proven to be a successful practical application in early and accurate detection of wheat scab (1 day after inoculation) by monitoring its released VOC markers. The synthetic strategy for core–shell dye/MOFs@COFs is applicable to a wide range of colorimetric sensor arrays, endowing them with excellent humidity-resistance and sensitivity for the feasibility of practical applications.

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Quantum Capacitance through Molecular Infiltration of 7,7,8,8-Tetracyanoquinodimethane in Metal–Organic Framework/Covalent Organic Framework Hybrids

Cited by 38 publications

References 70 publications

Enabling Multi-Chemisorption Sites on Carbon Nanofibers Cathodes by an In-situ Exfoliation Strategy for High-Performance Zn–Ion Hybrid Capacitors

Enabling Multi-Chemisorption Sites on Carbon Nanofibers Cathodes by an In-situ Exfoliation Strategy for High-Performance Zn–Ion Hybrid Capacitors

MOF/COF hybrids as next generation materials for energy and biomedical applications

Humidity-Independent Artificial Olfactory Array Enabled by Hydrophobic Core–Shell Dye/MOFs@COFs Composites for Plant Disease Diagnosis

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