Novel Ag configurations decorated CuO hybrid electrode for high-performance asymmetric supercapacitor

Mao, Yongyun; Qian, Yinjie; Li, Lun; Li, Yong; Xie, Jiyang; Hu, Wanbiao

doi:10.1007/s10853-020-04513-w

Cited by 28 publications

(7 citation statements)

References 58 publications

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“…The supercapacitance performance of nanostructured CuO is compared with other related reports based on various parameters, which indicates the remarkable performance of Cu-MOF-derived CuO, demonstrating a higher specific capacitance with good long-term stability (Table S5). ,,− Hence, the MOF-derived nanostructured CuO can be an encouraging material for electrochemical energy storage because it delivers notable specific capacitance and reveals long-term cyclic stability without utilizing any costly binders/conducting additives.…”

Section: Resultsmentioning

confidence: 99%

Construction of a Cu-Based Metal–Organic Framework by Employing a Mixed-Ligand Strategy and Its Facile Conversion into Nanofibrous CuO for Electrochemical Energy Storage Applications

et al. 2021

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Recently, metal–organic frameworks (MOFs) have been widely employed as a sacrificial template for the construction of nanostructured materials for a range of applications including energy storage. Herein, we report a facile mixed-ligand strategy for the synthesis of a Cu-MOF, [Cu3(Azopy)3(BTTC)3(H2O)3·2H2O] n (where BTTC = 1,2,4,5-benzenetetracarboxylic acid and Azopy = 4,4′-azopyridine), via a slow-diffusion method at room temperature. X-ray analysis authenticates the two-dimensional (2D)-layered framework of Cu-MOF. Topologically, this 2D-layered structure is assigned as a 4-connected unimodal net with sql topology. Further, nanostructured CuO is obtained via a simple precipitation method by employing Cu-MOF as a precursor. After analysis of their physicochemical properties through various techniques, both materials are used as surface modifiers of glassy carbon electrodes for a comparative electrochemical study. The results reveal a superior charge storage performance of CuO (244.2 F g–1 at a current density of 0.8 A g–1) with a high rate capability compared to Cu-MOF. This observation paves the pathway for the strategic design of high-performing supercapacitor electrode materials.

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Section: Resultsmentioning

confidence: 99%

Construction of a Cu-Based Metal–Organic Framework by Employing a Mixed-Ligand Strategy and Its Facile Conversion into Nanofibrous CuO for Electrochemical Energy Storage Applications

et al. 2021

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“…The high-resolution O 1s spectra of CuO and Al 5.0 CuO are presented in Figure 4c,f, respectively, both of which were deconvoluted into two sub-peaks that corresponded to the oxygen ions (O 2− ) in CuO (Cu-O) and the surface absorbed oxygen from the -OH − group and water (H-OH). The broad integrated area of the H-OH peaks in both the samples indicated abundant physiosorbed oxygen on the surface of the nanoflakes to provide defect sites, which possessed a strong electrostatic affinity to OH − ions in basic media, thus markedly accelerating the electrochemical activities [18,21,34,42]. The high-resolution Al 2p spectrum of the Al 5.0 CuO sample (cf.…”

Section: Physico-chemical Propertiesmentioning

confidence: 98%

“…However, its low electrical conductivity, structural collapse during cycling, low capacitance, minimal energy density, and flat-rate capabilities are still challenges faced in its supercapacitor application [17]. To overcome these shortcomings, several strategies have been adopted, such as (i) doping with various elements to improve the electrical conductivity and induce defects to increase the redox-active sites, (ii) combining with other materials (such as metal oxides and/or carbon nanomaterials) to increase the active surface sites and structural stability for improved interfacial activities, and (iii) tuning the microstructure and surface morphology (mainly at nanoscale) via various innovative methods to increase the reactivity [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Battery-Type Behavior of Al-Doped CuO Nanoflakes to Fabricate a High-Performance Hybrid Supercapacitor Device for Superior Energy Storage Applications

Pallavolu,

Banerjee,

Joo

2023

Coatings

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The ever-increasing energy demands have prompted researchers to develop innovative charge-storage devices. Here, aluminum-doped copper-oxide nanoflakes were fabricated via a simple co-precipitation method to investigate the electrochemical properties, which depicted a novel dominant battery-type charge-storage mechanism, manifested by the porous morphology of the electrodes to enhance the diffusion-controlled process. Copper oxide was chosen as the electroactive material due to its low cost, easy processability, environmental friendliness, and multiple oxidation states, all of which are very important for practical applicability in charge-storage devices. Additionally, aluminum was chosen as a dopant due to its elemental abundance, non-toxicity, and energetically favorable ionic radius for substitutional doping. A maximum 272 C/g (@1 A/g current-density) specific capacity was observed for 5 wt% Al-doped CuO. Evidently, higher Al-doping provided increased defects and doping sites to enhance the redox activity in order to improve the supercapacitive performance. A combinatorial battery−capacitor charge-storage mechanism was proposed in terms of the accumulation and intercalation of charges at the inner electroactive sites of the nanoflakes through a large number of voids and cavities in order to contribute towards dominant battery-type diffusion capacitance, while optimum Al-doping created considerable redox-active sites to promote surface-controlled pseudocapacitance. The optimized Al-CuO electrode revealed extraordinary long-term cycling stability with 99% capacity retention over 5000 charge/discharge cycles. A hybrid two-electrode device, made up of a battery type Al-CuO positrode and capacitor-type activated-carbon negatrode, demonstrated a remarkable energy-power performance with a maximum energy density of 30 Wh/kg and a maximum power density of 7.25 kW/kg, with an excellent cycle life (98% capacity retention over 5000 cycles). This work demonstrates a novel strategy to fabricate high-performance hybrid supercapacitors for the next generation charge-storage devices.

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“…Synthesis of nanostructures of various copper oxides utilising potentialostatic mode. Prepared, by potentiostatic form agglomerated angular CuO crystallites [50,51]. CuO cauliflowers are synthesized using a clear, affordable potentiodynamic method at oxidative conditions and low temperature on a stainless-steel substratum.…”

Section: Cupric Oxide Electrodementioning

confidence: 99%

Cupric Oxide based Supercapacitors: A Review

Jithul

Samra

2022

J. Phys.: Conf. Ser.

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Energy storage materials are critical for reliable, safe, and flexible energy usage, as well as for using renewable energy sources. As a result, the materials that used to store energy encompass a huge range of materials that are attracting a lot of attention from research and development to industry. Supercapacitors (SCs) have attracted considerable interest as high-power storage device, with the potential to make a contribution to the speedy increase of low-energy electronics (e.g., transportable electronic home equipment, wearable) and military packages. The selection of electrode materials may also have a big impact on the storage capacity of supercapacitors. The review paper discusses the energy storage devices, types of supercapacitors, preparation methods of CuO and advantage of CuO/RGO hybrid nano composite electrode supercapacitors.

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Novel Ag configurations decorated CuO hybrid electrode for high-performance asymmetric supercapacitor

Cited by 28 publications

References 58 publications

Construction of a Cu-Based Metal–Organic Framework by Employing a Mixed-Ligand Strategy and Its Facile Conversion into Nanofibrous CuO for Electrochemical Energy Storage Applications

Construction of a Cu-Based Metal–Organic Framework by Employing a Mixed-Ligand Strategy and Its Facile Conversion into Nanofibrous CuO for Electrochemical Energy Storage Applications

Battery-Type Behavior of Al-Doped CuO Nanoflakes to Fabricate a High-Performance Hybrid Supercapacitor Device for Superior Energy Storage Applications

Cupric Oxide based Supercapacitors: A Review

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