Co3O4@CoNi-LDH core/shell nanosheet arrays for high-performance battery-type supercapacitors

Zhou, Jiao–Jiao; Li, Qin; Chen, Chen; Li, Yanli; Tao, Kai; Han, Lei

doi:10.1016/j.cej.2018.06.023

Cited by 193 publications

(58 citation statements)

References 45 publications

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“…The CoNi-LDH nanoowers composed of ultrathin nanosheets are prepared through a typical method. 20,32 The SEM and electrochemical properties of CoNi-LDH are displayed in Fig. S3.…”

Section: Resultsmentioning

confidence: 99%

MOF-derived Bi₂O₃@C microrods as negative electrodes for advanced asymmetric supercapacitors

Sun

Zhao

et al. 2020

RSC Adv.

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“…The CoNi-LDH nanoowers composed of ultrathin nanosheets are prepared through a typical method. 20,32 The SEM and electrochemical properties of CoNi-LDH are displayed in Fig. S3.…”

Section: Resultsmentioning

confidence: 99%

MOF-derived Bi₂O₃@C microrods as negative electrodes for advanced asymmetric supercapacitors

Sun

Zhao

et al. 2020

RSC Adv.

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“…Secondly,t he electroactivities of both core and shell materials are fully utilized. Thirdly, the direct growth of electrode materials on ac urrentc ollector avoids the use of non-conductive additives,e nsuring high mechanical stabilitya nd conductivity.I nt his regard,s everalc oreshell electrodes such as Co 3 O 4 @Ni(OH) 2 , [8] Co 3 O 4 @Ni-Co-LDH, [9] and Zn-Co-S@Ni(OH) 2 , [10] have been developed, and they have displayed excellent electrochemical performances. Based on the above aspects, enhanced electrochemical performance can be expected by rationally designing ac ore-shell ZnCo 2 O 4 @Ni(OH) 2 electrode, in which the advantages of ZnCo 2 O 4 and Ni(OH) 2 are combined.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework Templated 3D Hierarchical ZnCo₂O₄@Ni(OH)₂ Core–Shell Nanosheet Arrays for High‐Performance Supercapacitors

Han

Yang

Zhou

et al. 2018

Chemistry A European J

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Designing core-shell electrode materials with desired components and architectures is a promising strategy for boosting electrochemical performance. Here, three-dimensional hierarchical ZnCo O @Ni(OH) core-shell nanosheet arrays have been successfully fabricated on a Ni foam substrate, in which the porous ZnCo O nanosheet "core" as the conductive scaffold was synthesized by a metal-organic framework (MOF)-templated method, and the ultrathin Ni(OH) nanoflakes "shell" with rich active sites were grafted on the ZnCo O nanosheet through a hydrothermal treatment. When directly used as a free-standing electrode for supercapacitor, these hierarchical ZnCo O @Ni(OH) core-shell nanosheet arrays exhibited a high capacitance of 3063.2 mF cm (1021.1 F g ) at the current density of 1 mA cm . This electrode significantly outperformed individual Ni(OH) or ZnCo O nanosheet arrays, benefiting from the robust core-shell arrays on Ni foam with good electrical conductivity and abundant active sites, as well as the synergetic effect between MOF-derived porous ZnCo O "core" and the ultrathin Ni(OH) "shell". Moreover, the assembled ZnCo O @Ni(OH) //activated-carbon asymmetric supercapacitor displayed excellent energy and power densities (maximum of 40.0 Wh kg and 8.02 kW kg ) and superior cycling stability of 98.4 % retention with 91.2 % coulombic efficiency over 5 000 cycles at 10 A g .

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“…In VO 2 (B)/GN, most of COOH groups are reduced by oxalic acid so that it is incapable of being detected by FT-IR. As shown in Figure 2e, the O 1s shows V–O–V (VO x ), O=C/V–O (H) and O–C peaks at 529.8, 530.4, 531.9 eV, respectively [37,39]. Based on the C 1s and O 1s spectra, certain number of V–O and C–O groups are shown, revealing that the VO 2 (B) and GN are likely to be combined by C–O–V chemical bond.…”

Section: Resultsmentioning

confidence: 99%

VO2(B)/Graphene Composite-Based Symmetrical Supercapacitor Electrode via Screen Printing for Intelligent Packaging

et al. 2018

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More multipurpose and convenient demand driven by Radio Frequency Identification (RFID) and intelligent packaging require flexible power sources. A VO2(B)/graphene (VO2(B)/GN) core-shell composite was successfully synthesized by the hydrothermal treatment with V2O5 and graphite. The as-obtained sample was characterized by XRD, FT-IR, SEM, TEM, and XPS measurements. In addition, the electrochemical properties of VO2(B)/GN were tested. Due to its great electrochemical performance and mechanical properties, graphene could increase the electrochemical performance and strengthen the structural stability of the material at the same time. With increasing loading amount of GN, the specific capacitance of VO2(B)/GN increased correspondingly. With 20% GN loading, the initial discharge specific capacity could reach 197 F g−1 at 0.5 A g−1, and 160 F g−1 at 1 A g−1 in 0.5 M Na2SO4 electrolyte, which is better than that of pure rod-like VO2(B). The capacitance of the VO2(B)/GN (20%) composite electrode retains 95.49% after 1000 cycles, which is higher than that of a pure VO2(B) electrode (85.43%), indicating that the VO2(B)/GN composite possesses better cycling stability. Moreover, a symmetrical solid-state supercapacitor (SCs) using VO2(B)/GN(20%) as the anode was assembled. Four printed SCs were connected in series to light up a 1.5 V red LED. This demonstrates its potential application in intelligent packaging to trace food safety.

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Co3O4@CoNi-LDH core/shell nanosheet arrays for high-performance battery-type supercapacitors

Cited by 193 publications

References 45 publications

MOF-derived Bi₂O₃@C microrods as negative electrodes for advanced asymmetric supercapacitors

MOF-derived Bi₂O₃@C microrods as negative electrodes for advanced asymmetric supercapacitors

Metal–Organic Framework Templated 3D Hierarchical ZnCo₂O₄@Ni(OH)₂ Core–Shell Nanosheet Arrays for High‐Performance Supercapacitors

VO2(B)/Graphene Composite-Based Symmetrical Supercapacitor Electrode via Screen Printing for Intelligent Packaging

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Co3O4@CoNi-LDH core/shell nanosheet arrays for high-performance battery-type supercapacitors

Cited by 193 publications

References 45 publications

MOF-derived Bi2O3@C microrods as negative electrodes for advanced asymmetric supercapacitors

MOF-derived Bi2O3@C microrods as negative electrodes for advanced asymmetric supercapacitors

Metal–Organic Framework Templated 3D Hierarchical ZnCo2O4@Ni(OH)2 Core–Shell Nanosheet Arrays for High‐Performance Supercapacitors

VO2(B)/Graphene Composite-Based Symmetrical Supercapacitor Electrode via Screen Printing for Intelligent Packaging

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Product

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MOF-derived Bi₂O₃@C microrods as negative electrodes for advanced asymmetric supercapacitors

MOF-derived Bi₂O₃@C microrods as negative electrodes for advanced asymmetric supercapacitors

Metal–Organic Framework Templated 3D Hierarchical ZnCo₂O₄@Ni(OH)₂ Core–Shell Nanosheet Arrays for High‐Performance Supercapacitors