Nanohybridization of Ni–Co–S Nanosheets with ZnCo<sub>2</sub>O<sub>4</sub> Nanowires as Supercapacitor Electrodes with Long Cycling Stabilities

Dai, Meizhen; Zhao, Depeng; Liu, Hengqi; Zhu, Xiaofei; Wu, Xiang; Wang, Bao

doi:10.1021/acsaem.0c03204

Cited by 72 publications

(29 citation statements)

References 42 publications

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“…At elevated scan rates, the diffusion process of the ions is observed to be predominant, while the capacitive process prevails at low scan rates. From the CV profiles in Figure a, the current ( I ) dependence with respect to the scan rate ( v ) can be evident for the two processes in line with the following equations: − …”

Section: Resultssupporting

confidence: 67%

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo₂O₄) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

et al. 2021

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Nickel cobalt oxide (NiCo2O4) nanoagglomerates were effectively synthesized through a simplistic low-temperature co-precipitation technique. The obtained material was further calcined to enhance its morphological properties and reduce the size of its individual particle of agglomerates. The as-synthesized NiCo2O4 agglomerates were characterized through the employment of various techniques, which include scanning/transmission electron microscopies (SEM/TEM), X-ray diffraction, Raman spectroscopy and X-ray fluorescence spectroscopy (XRF), and thermogravimetric analysis (TGA). Electrochemical performances of the as-synthesized electrode materials evaluated in a three-electrode configuration could deliver an optimized specific capacity of 95.6 mA h g–1 at a 0.5 A g–1 specific current. A fabricated hybrid asymmetric supercapacitor (SC) composed of NiCo2O4 and the activated carbon obtained from cocoa pods (Cocoa AC-700) as the positive and negative electrodes (NiCo2O4//AC cocoa-700), respectively, delivered a specific capacity of around 168.7 mA h g–1 at 0.5 A g–1 and a corresponding specific energy and power of 47.7 W h kg–1 and 430.0 W kg–1, respectively. The SC exhibited a substantial cycling stability, resulting in a Coulombic efficiency of 97.2% with a related capacity retention of 96.6% recorded after a cycling test of over 11,000 cycles at 5 A g–1.

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Section: Resultssupporting

confidence: 67%

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo₂O₄) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

et al. 2021

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“…As an important strategy, CV curves are used to understand the reaction kinetics of the synthesized materials. Current (A) and scan rate (V) can be fitted by the following formula: …”

Section: Results and Discussionmentioning

confidence: 99%

Ni Foam Substrates Modified with a ZnCo₂O₄ Nanowire-Coated Ni(OH)₂ Nanosheet Electrode for Hybrid Capacitors and Electrocatalysts

Dai

Liu

Zhao

et al. 2021

ACS Appl. Nano Mater.

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For the construction of high-performance energy storage and conversion devices, the development of advanced electrode materials with specific nanostructural characteristics is a requirement of the moment. Several types of ZnCo 2 O 4 @Ni(OH) 2 nanoarchitectures are prepared in this study using a simple two-step hydrothermal strategy. At 1 A g −1 , the observed capacitance of the ZnCo 2 O 4 @Ni(OH) 2 -2.0 sample-based hybrid capacitor was 848.6 C g −1 . The fabricated capacitor device exhibited not only high energy density but also an excellent cycling stability. As an electrocatalyst, the same sample, that is, ZnCo 2 O 4 @Ni(OH) 2 -2.0, demonstrates 280.2 mV over potential at 50 mA cm −2 . This research shows that the provided electrode material is well suited for future capacitor and electrocatalyst applications.

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“…The C-NiCo 2 O 4 /C nanowires exhibit an excellent specific capacitance of 2654 F g –1 but an ordinary area-specific capacitance of 6.1 F cm –2 at 3 A g –1 current density. Nickel cobalt sulfides are frequently used as electrode materials for energy storage devices because of their rich redox active sites and superior conductivity. − Therefore, to further increase the mass loading and area-specific capacitance of the electrode materials, and thus improve the energy density of devices, Ni–Co–S nanosheets are grown on the C-NiCo 2 O 4 /C nanowire electrode by electrochemical deposition, and the formed macropores between Ni–Co–S nanosheets can provide favorable channels for ion transport. The results of electrochemical measurement indicate that the C-NiCo 2 O 4 /C@Ni–Co–S nanoarrays as a free binder electrode exhibit excellent specific capacitance of 2396 F g –1 (7.9 F cm –2 ) at the current density of 3 A g –1 and good rate performance (74%) and cycling stability (92%), which is higher than that of the C-NiCo 2 O 4 /C electrode.…”

Section: Introductionmentioning

confidence: 99%

Multidimensional Carbon-Modified NiCo₂O₄/Ni–Co–S Nanocomposite Electrode Material for High-Energy Asymmetric Supercapacitors

Sun

et al. 2021

Energy Fuels

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The synergistic effect of the electrochemical double-layer and pseudocapacitance electrode materials has been extensively used to improve the performance of composite electrodes for supercapacitors (SCs). However, the energy density of SCs is still unsatisfactory for practical utilization. Herein, a C-NiCo 2 O 4 /C@Ni−Co−S electrode is ingeniously devised through coupling the interior of 0D/2D carbon-modified NiCo 2 O 4 and the external sheath of Ni−Co−S nanosheets. The 0D carbon quantum dot doping can effectively avoid the agglomeration of NiCo 2 O 4 nanoparticles and improve the electronic conductivity. 2D carbon as the intermediate layer can ameliorate the physical/chemical stability of the electrode. Ni−Co−S nanosheets can improve the areaspecific capacitance of the electrode and thus enhance the energy density of the device. As expected, the C-NiCo 2 O 4 /C@Ni−Co−Selectrode delivers an outstanding specific capacitance of 2396 F g −1 (7.9 F cm −2 ) at 3 A g −1 and excellent cycling stability (92% after 10 000 cycles). Furthermore, a quasi-solid-state asymmetric supercapacitor (ASC) using C-NiCo 2 O 4 /C@Ni−Co−S as positive electrode and active carbon (AC) as negative electrode exhibits a high energy density of 95 Wh kg −1 at 0.9 kW kg −1 and an excellent cycle performance. Our work reveals that this reasonable structure design is very effective for achieving a high-performance positive electrode for practical SC applications.

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Nanohybridization of Ni–Co–S Nanosheets with ZnCo₂O₄ Nanowires as Supercapacitor Electrodes with Long Cycling Stabilities

Cited by 72 publications

References 42 publications

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo₂O₄) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo₂O₄) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

Ni Foam Substrates Modified with a ZnCo₂O₄ Nanowire-Coated Ni(OH)₂ Nanosheet Electrode for Hybrid Capacitors and Electrocatalysts

Multidimensional Carbon-Modified NiCo₂O₄/Ni–Co–S Nanocomposite Electrode Material for High-Energy Asymmetric Supercapacitors

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Nanohybridization of Ni–Co–S Nanosheets with ZnCo2O4 Nanowires as Supercapacitor Electrodes with Long Cycling Stabilities

Cited by 72 publications

References 42 publications

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo2O4) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo2O4) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

Ni Foam Substrates Modified with a ZnCo2O4 Nanowire-Coated Ni(OH)2 Nanosheet Electrode for Hybrid Capacitors and Electrocatalysts

Multidimensional Carbon-Modified NiCo2O4/Ni–Co–S Nanocomposite Electrode Material for High-Energy Asymmetric Supercapacitors

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Product

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About

Nanohybridization of Ni–Co–S Nanosheets with ZnCo₂O₄ Nanowires as Supercapacitor Electrodes with Long Cycling Stabilities

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo₂O₄) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

High-Energy Asymmetric Supercapacitor Based on the Nickel Cobalt Oxide (NiCo₂O₄) Nanostructure Material and Activated Carbon Derived from Cocoa Pods

Ni Foam Substrates Modified with a ZnCo₂O₄ Nanowire-Coated Ni(OH)₂ Nanosheet Electrode for Hybrid Capacitors and Electrocatalysts

Multidimensional Carbon-Modified NiCo₂O₄/Ni–Co–S Nanocomposite Electrode Material for High-Energy Asymmetric Supercapacitors