Polyhedron-core/double-shell CuO@C@MnO2 decorated nickel foam for high performance all-solid-state supercapacitors

Wang, Yuqiao; Wang, Shasha; Wu, Yijun; Zheng, Zimin; Hong, Kunquan; Li, Baosong; Sun, Yueming

doi:10.1016/j.electacta.2017.06.139

Cited by 20 publications

(11 citation statements)

References 42 publications

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“…The morphology of the CoO/NiO–Cu@CuO has no obvious change, as observed from Figures h and S9. In addition, under a current density of 0.9 A g –1 , the obtained CoO/NiO–Cu@CuO electrode shows an excellent supercapacitance of 885 F g –1 , which is comparable to or higher than most of CuO-based electrodes from the literature recently ,,,,− (Figure g). The revealed excellent supercapacitance of the CoO/NiO–Cu@CuO electrode should be caused by the unique morphology of the designed hierarchical heterostructure, as shown in Figure i.…”

Section: Resultsmentioning

confidence: 58%

“…Furthermore, the prepared equipment unit achieves an energy density of 69.3 W h kg −1 at a power density of 1080 W kg −1 , as shown in Figure 5g, which is comparable to or higher than that in the reported literature. 8,10,20,22,36,37,40,42 EIS measurements for the CoO/NiO−Cu@CuO//AC ASC device were performed using a sinusoidal signal with a specific scope (0.01 Hz−100 kHz), which is shown in Figure S8. The equivalent series resistance was calculated to be 1.8 Ω according to the measured Nyquist plots.…”

Section: Resultsmentioning

confidence: 99%

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Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)₂ Nanorod Arrays for High-Performance Supercapacitors

Zhang

Yue

Jia

et al. 2019

ACS Appl. Mater. Interfaces

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The development for environmentally friendly energy conversion and storage equipment has given rise to tremendous research efforts as a result of the growing requirements for environmental friendly resources and the rapid consumption of traditional fossil fuel. Herein, a novel hierarchical CoO/NiO–Cu@CuO heterostructure is successfully devised and synthesized. Cobalt/nickel ions are used to generate novel CoO/NiO-doped laminated CuO nanospheres through the facile in situ wet oxidation combined with cation exchange and calcination strategies. As a result, the electrochemical supercapacitance of the as-prepared CoO/NiO–Cu@CuO electrode can reach 875 C cm–2 (2035 mF cm–2), which exhibits much better electrochemical performance compared to other precursor electrodes at a same current density of 2 mA cm–2. Moreover, an excellent rate capacity of 1395 mF cm–2 (50 mA cm–2) can be achieved when measured at a relative high current density; 90.3% of the initial supercapacitance remains even after 5000 cycles. Furthermore, the as-prepared hierarchical hybrid of laminated CoO/NiO–CuO nanospheres in situ generated on three-dimensional (3D) porous Cu foam is applied to prepare a solid-state asymmetric supercapacitor equipment unit. The fabricated equipment unit shows an energy density of 69.3 W h kg–1 at a power density of 1080 W kg–1. Additionally, the commercially applied 2.5 V light-emitting-diode indicator with blue light can be energized for 4 min when two as-fabricated supercapacitor devices are in series connection. The unique hierarchical heterostructure of the novel laminated nanospheres combined with the 3D grid structure brings about the outstanding electrochemical capacitor performances. This strategy for the fabrication of hierarchical heterostructure electrodes could have an enormous potential for high-performance electrochemical equipment.

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Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)₂ Nanorod Arrays for High-Performance Supercapacitors

Zhang

Yue

Jia

et al. 2019

ACS Appl. Mater. Interfaces

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“…However, the diffraction peaks of the carbon are absent, which is probably due to the low crystallinity and mass loading of the carbon. [10] For Mn x O y (Figure 2b), the diffraction peaks located at 23.1°, 33.0°, 38.4°, 49.4°, 55.1°and 65.9°are assigned to the (211), (222), (400), [11] and the corresponding values were approximately 14.9, 29.3 and 55.0 nm, respectively.…”

Section: Morphology and Structure Characterizationmentioning

confidence: 97%

Effect of Manganese Valence on Specific Capacitance in Supercapacitors of Manganese Oxide Microspheres

Chen

Wang

et al. 2021

Chemistry A European J

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Manganese oxides have attracted great interest in electrochemical energy storage due to high theoretical specific capacitance and abundant valence states. The multiple valence states in the redox reactions are beneficial for enhancing the electrochemical properties. Herein, three manganese microspheres were prepared by a one-pot hydrothermal method and subsequent calcination at different temperatures using carbon spheres as templates. The trivalent manganese of Mn 2 O 3 exhibited multiple redox transitions of Mn 3 + /Mn 2 + and Mn 4 + /Mn 3 + during the intercalation/deintercalation of electrolyte ions. The possible redox reactions of Mn 2 O 3 were proposed based on the cyclic voltammetry and differential pulse voltammogram results. Mn 2 O 3 microsphere integrated the advantages of multiple redox couples and unique structure, demonstrating a high specific capacitance and long cycling stability. The symmetric Mn 2 O 3 //Mn 2 O 3 device yielded a maximum energy density of 29.3 Wh kg À 1 at 250 W kg À 1 .

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“…[36,[90][91][92] The facet-dependent studies are of wide importance due to their influence on the overall selectivity and performance of the electrode. [93][94][95] Different facets, including 14-facets polyhedral, [96] 26-facet polyhedral, [97,98] 50-facet polyhedral, [99] 74-facet polyhedral, [100] and multi facet-polyhedral complex structures, [101,102] are explored with time. As (c, d) HRTEM images taken along the [01 1] zone axis on CuNCs.…”

Section: Facet Dependent Cu-based Co 2 Reductionmentioning

confidence: 99%

Strategies for Improved Electrochemical CO₂ Reduction to Value‐Added Products by Highly Anticipated Copper‐Based Nanoarchitectures

Khan

2021

The Chemical Record

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Uncontrolled CO 2 emission from various industrial and domestic sources is a considerable threat to environmental sustainability. Scientists are trying to develop multiple approaches to not only reduce CO 2 emissions but also utilize this potent pollutant to get economically feasible products. The electrochemical reduction of CO 2 (ERC) is one way to effectively convert CO 2 to more useful products (ranging from C1 to C5). Nevertheless, this process is kinetically hindered and less selective towards a specific product and, consequently, requires an efficient electrocatalyst with characteristics like selectivity, stability, reusability, low cost, and environmentally benign. Owing to specified commercial features, copper (Cu)-based materials are highly anticipated and widely investigated for the last two decades. However, their non-modified polycrystalline Cu forms usually lack selectivity and lower overpotential of CO 2 reduction. Therefore, extensive research is in progress to induce various alterations ranging from morphological and surface chemistry tuning to structural and optoelectrical characteristics modifications. This review provides an overview of those strategies to improve the CO 2 conversion efficiency through Cu-based ERC into valuable C1, C2 , and higher molecular weight hydrocarbons. The thermodynamics and kinetics of CO 2 reduction via Cu-based electrocatalysts are discussed in detail with the support of the first principle DFT-based models. In the last portion of the review, the reported mechanisms for various products are summarized, with a short overview of the outlook. This review is expected to provide important basics as well as advanced information for experienced as well as new researchers to develop various strategies for Cu and related materials to achieve improved ERC.

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Polyhedron-core/double-shell CuO@C@MnO2 decorated nickel foam for high performance all-solid-state supercapacitors

Cited by 20 publications

References 42 publications

Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)₂ Nanorod Arrays for High-Performance Supercapacitors

Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)₂ Nanorod Arrays for High-Performance Supercapacitors

Effect of Manganese Valence on Specific Capacitance in Supercapacitors of Manganese Oxide Microspheres

Strategies for Improved Electrochemical CO₂ Reduction to Value‐Added Products by Highly Anticipated Copper‐Based Nanoarchitectures

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Polyhedron-core/double-shell CuO@C@MnO2 decorated nickel foam for high performance all-solid-state supercapacitors

Cited by 20 publications

References 42 publications

Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)2 Nanorod Arrays for High-Performance Supercapacitors

Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)2 Nanorod Arrays for High-Performance Supercapacitors

Effect of Manganese Valence on Specific Capacitance in Supercapacitors of Manganese Oxide Microspheres

Strategies for Improved Electrochemical CO2 Reduction to Value‐Added Products by Highly Anticipated Copper‐Based Nanoarchitectures

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Product

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Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)₂ Nanorod Arrays for High-Performance Supercapacitors

Cobalt/Nickel Ions-Assisted Synthesis of Laminated CuO Nanospheres Based on Cu(OH)₂ Nanorod Arrays for High-Performance Supercapacitors

Strategies for Improved Electrochemical CO₂ Reduction to Value‐Added Products by Highly Anticipated Copper‐Based Nanoarchitectures