Ultrathin nanosheet-assembled hollow microplate CoMoO4 array derived from metal-organic framework for supercapacitor with ultrahigh areal capacitance

Li, Qin; Li, Yanli; Zhao, Jing; Zhao, Shihang; Zhou, Jiao–Jiao; Chen, Chen; Tao, Kai; Li, Rui; Han, Lei

doi:10.1016/j.jpowsour.2019.05.011

Cited by 112 publications

(64 citation statements)

References 60 publications

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“…To further assess the electrode for practical application, an all solid‐state HSC cell (Co–MOF@CoCr 2 O 4 /NF//AC) was constructed using Co–MOF@CoCr 2 O 4 /NF directly as the positive electrode and AC/NF as negative electrode and poly (vinyl alcohol) (PVA)/KOH as the gel electrolyte, respectively (Figure a) . A blue LED could be lighted for nearly 3 min by two all solid‐state HSC cells in‐series (Figure b).…”

Section: Resultssupporting

confidence: 60%

“…The crystal phase of Co–MOF scraped from NF was recorded through XRD. As depicted in Figure S1, all observed XRD peaks matched well with the simulated patterns of Co–MOF [Co 2 (OH) 2 BDC, CCDC 153067] in previous report and thus proved that pure Co–MOF phase was successfully grown on NF. The morphologies of Co–MOF/NF were characterized by SEM and TEM.…”

Section: Resultsmentioning

confidence: 99%

“…The Ni foam supported Co–MOF array and powder samples were synthesized according to our previous report . Co–MOF@CoCr 2 O 4 /NF was prepared by simple hydrothermal reaction.…”

Section: Methodsmentioning

confidence: 99%

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Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr₂O₄ Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

Zhou

Zhao

et al. 2020

ChemElectroChem

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Hollow metal-organic frameworks (MOFs) and their derived materials have shown fascinating structural complexity, such as diverse morphology, tunable porosity and hierarchical structure, which largely extends their intrinsic applications, especially in electrochemical energy storage and conversion. Herein, a hollow and hierarchical Co-MOF@CoCr 2 O 4 microplate array on nickel foam was successfully prepared through a simple onestep in situ conversion strategy, in which Co-MOF served both as self-supporting etching template and as a self-sacrificing ionexchange template. When used as a battery-type electrode for advanced hybrid supercapacitors, the Co-MOF@CoCr 2 O 4 composite expressed a high specific capacity of 596.8 C g À 1 at 0.4 A g À 1 , excellent rate properties (72.6 % retention rate at 10 A g À 1 compared with the initial capacitance at 0.4 A g À 1 ) and good cycling stability (85.1 % retention over 5000 cycles). Furthermore, a fabricated hybrid supercapacitor device reached a high energy density of 0.4 mWh cm À 2 (34.36 Wh kg À 1 ) at a power density of 2.34 mW cm À 2 (201.03 W kg À 1 ), and superior cycle stability (96.2 % retention over 5000 cycles). These enhanced electrochemical behaviors indicated that this advanced approach can be extended to design various hollow and hierarchical structural MOF/bimetallic-oxide-based composite arrays for high-performance hybrid supercapacitors.[a] Dr.

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Section: Resultssupporting

confidence: 60%

Section: Resultsmentioning

confidence: 99%

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Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr₂O₄ Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

Zhou

Zhao

et al. 2020

ChemElectroChem

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“…19 It is well-known that the 1D nanofibers are generated by the electrospinning precursor, which endows them with variability. 20 On one hand, introducing the multicomponent polymers could result in the multichannel or porous CNFs, 21 which easily allow the penetration of electrolytes, thus enhancing the charge transfer process in electrochemical capacitors (ECs). 22 On the other hand, changing the precursor of metal salt or combining another preparation method could easily integrate different components Herein, the electrospinning technology was integrated with the chemical bath deposition method to fabricate MnO 2 nanosheets grown on multichannel carbon nanofibers containing amorphous cobalt oxide (denoted as CoMCNFs@MnO 2 ).…”

Section: Introductionmentioning

confidence: 99%

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Sun

Bai

et al. 2019

ACS Appl. Energy Mater.

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In this study, MnO2 nanosheets grown on the multichannel carbon nanofibers containing amorphous cobalt oxide (CoMCNFs@MnO2) are prepared via electrospinning technology followed by carbonization and a facile chemical bath deposition process. The as-obtained CoMCNFs@MnO2 shows flexible features, which could serve as freestanding electrodes applied in supercapacitors. As a result, CoMCNFs@MnO2-2.5 exhibits the specific capacitance of 265 F g–1 at 0.5 A g–1, which surpasses those of their individual counterparts (135 and 143 F g–1 at 0.5 A g–1 for MCNFs@MnO2 and CoMCNFs, respectively). Moreover, After 10000 cycles, the specific capacitance of CoMCNFs@MnO2-2.5 also maintained 98.7%. Most importantly, the asymmetric supercapacitor (ASC) is assembled with CoMCNFs@MnO2-2.5 and the electrospinning carbon nanofibers (CNFs), which exhibit a high E of 19.27 Wh kg–1 with a P of 217.51 W kg–1 at 0.3 A g–1 and outstanding cycle ability of capacitance retention of 94.9% after 10000 cycles. This work paves a way to develop high-performance wearable asymmetric supercapacitors.

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“…The N 1s spectrum separated into two peaks at 398.4 eV and 400.1 eV, which were assigned to sp 2 -hybridized nitrogen in triazine rings (C-N=C) and tertiary nitrogen (N-(C) 3 ) groups [27]. The Co 2p spectrum shows two peaks at 780.9 eV and 796.1 eV of the Co 2p 3/2 and Co 2p 1/2 energy levels, demonstrating that Co is divalent [28]. At the same time, the peaks of Cu 2p at 931.8 eV and 951.7 eV imply the existence of Cu 2+ .…”

Section: Resultsmentioning

confidence: 98%

Cu0.4Co0.6MoO4 Nanorods Supported on Graphitic Carbon Nitride as a Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia Borane

Liao

et al. 2019

Catalysts

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As a typical chemical hydride, ammonia borane (AB) has received extensive attention because of its safety and high hydrogen storage capacity. The aim of this work was to develop a cost-efficient and highly reactive catalyst for hydrolyzing AB. Herein, we synthesized a series of CuxCo1–xMoO4 dispersed on graphitic carbon nitride (g-C3N4) to dehydrogenate AB. Among those CuxCo1–xMoO4/g-C3N4 catalysts, Cu0.4Co0.6MoO4/g-C3N4 exhibited the highest site time yield (STY) value of 75.7 m o l H 2 m o l c a t − 1 m i n − 1 with a low activation energy of 14.46 kJ mol−1. The STY value for Cu0.4Co0.6MoO4/g-C3N4 was about 4.3 times as high as that for the unsupported Cu0.4Co0.6MoO4, indicating that the g-C3N4 support plays a crucial role in improving the catalytic activity. Considering its low cost and high catalytic activity, our Cu0.4Co0.6MoO4/g-C3N4 catalyst is a strong candidate for AB hydrolysis for hydrogen production in practical applications.

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Ultrathin nanosheet-assembled hollow microplate CoMoO4 array derived from metal-organic framework for supercapacitor with ultrahigh areal capacitance

Cited by 112 publications

References 60 publications

Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr₂O₄ Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr₂O₄ Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Cu0.4Co0.6MoO4 Nanorods Supported on Graphitic Carbon Nitride as a Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia Borane

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Ultrathin nanosheet-assembled hollow microplate CoMoO4 array derived from metal-organic framework for supercapacitor with ultrahigh areal capacitance

Cited by 112 publications

References 60 publications

Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr2O4 Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr2O4 Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

MnO2 Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Cu0.4Co0.6MoO4 Nanorods Supported on Graphitic Carbon Nitride as a Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia Borane

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Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr₂O₄ Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr₂O₄ Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors