Hybrid supercapacitor based on graphene and Ni/Ni(OH)2 nanoparticles formed by a modified electrochemical exfoliation method

Ren, Zhaodi; Luo, Haowen; Mao, Haochao; Li, Ang; Dong, Rui; Liu, Shaohua; Liu, Yuanan

doi:10.1016/j.cplett.2020.138019

Cited by 17 publications

(5 citation statements)

References 33 publications

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“…Firstly, there exists the synergistic effect between the Cu 0 , Cu +1 and Cu +2 , which can benefit the sensing property; Secondly, graphene is incorporated in the hybrid material of Cu and its oxides and thus improve the surface area of the electrode; Thirdly, the coupling between the graphene and the metal can be alleviated due to the existence of the Cu oxides between Cu and graphene, which is probably increase the property of the graphene itself and thus benefit the sensing property. A non-enzymatic glucose biosensor with high sensitivity thus was constructed by electrochemical exfoliated [27] graphene modified Cu foil that undergoing thermally oxidized in air. This work provides a new way to study the effects of the interface contact between metal oxides and graphene to their applications especially in glucose sensor.…”

Section: Introductionmentioning

confidence: 99%

Free-standing hybrid material of Cu/Cu₂O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

Ren¹,

Dong²,

Liu³

2022

Nanotechnology

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Free-standing Cu/Cu2O/CuO modified by graphene was formed through two steps: Firstly, the commercial Cu foil was thermal annealed to form Cu/Cu2O/CuO; Secondly, the Cu/Cu2O/CuO was modified by graphene through electrochemical exfoliated method. The SEM, XRD，TEM and XPS have been used to characterize the morphology, the crystalline phase, and the surface composition of the hybrid electrode as-prepared. The effects of Cu and its oxides on graphene has been uncovered by the Raman results. The sensitivity of the glucose sensor in 0.1M NaOH by using the as-prepared hybrid material reaches 3102µA·mM-1cm-2 within a linear range of 0.002-2.88mM, which is better than that of the Cu/graphene and the Cu/Cu2O/CuO prepared at the same conditions. The sensor also shows excellent anti-interference ability, good cycling stability and time stability. The advantage of the sensor is caused by the strengthened synergistic effects between the graphene and the Cu/Cu2O/CuO due to the alleviated detrimental effects of the metal on the property of the graphene through using oxides middle layer as well as the large active area that obtained. This work provides a new way to study the effects of graphene in improving the property of the metal oxide especially in using for glucose sensor.

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Section: Introductionmentioning

confidence: 99%

Free-standing hybrid material of Cu/Cu₂O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

Ren¹,

Dong²,

Liu³

2022

Nanotechnology

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“…Decomposition of high-resolution spectra of Ni 2p 3/2 , shown in Figure 4E, reveals that four distinct peaks are at a binding energy of 863.0, 859.4, 855.4, and 862.5 eV. The peak at 852.8 eV corresponds to the metallic form of Ni (3p3/2) with its satellite peak Ni (3p 3/2, sat ) at 859.4 eV (Darvishi et al, 2017;Ren et al, 2020). Similarly, the peak at 855.4 eV shows nickel hydroxide (Ni 2+ oxidation state, 3p 3/2 ) with its satellite peak (3p 3/2, sat ) at 862.5 eV (Darvishi et al, 2017;Ren et al, 2020).…”

Section: Resultsmentioning

confidence: 97%

“…The peak at 852.8 eV corresponds to the metallic form of Ni (3p3/2) with its satellite peak Ni (3p 3/2, sat ) at 859.4 eV (Darvishi et al, 2017;Ren et al, 2020). Similarly, the peak at 855.4 eV shows nickel hydroxide (Ni 2+ oxidation state, 3p 3/2 ) with its satellite peak (3p 3/2, sat ) at 862.5 eV (Darvishi et al, 2017;Ren et al, 2020). This indicates that Ni 0 and Ni 2+ states are present on the surface of the WO 3 -Ni-Gr composite which can act as better oxygen dissociation catalysts.…”

Section: Resultsmentioning

confidence: 99%

A novel room-temperature formaldehyde gas sensor based on walnut-like WO3 modification on Ni–graphene composites

et al. 2022

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Ternary composite with great modulation of electron transfers has attracted a lot of attention from the field of high-performance room-temperature (RT) gas sensing. Herein, walnut-like WO3-Ni–graphene ternary composites were successfully synthesized by the hydrothermal method for formaldehyde (HCHO) sensing at RT. The structural and morphological analyses were carried out by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). SEM and TEM studies confirmed that walnut-like WO3 nanostructures with an average size of 53 ± 23 nm were functionalized. The Raman and XPS results revealed that, due to the deformation of the O-W-O lattice, surface oxygen vacancies Ov and surface-adsorbed oxygen species Oc were present. The gas-sensing measurement shows that the response of the WO3-Ni-Gr composite (86.8%) was higher than that of the Ni-Gr composite (22.7%) for 500 ppm HCHO at RT. Gas-sensing enhancement can be attributed to a p-n heterojunction formation between WO3 and Ni-Gr, Oc, spill-over effect of Ni decoration, and a special walnut-like structure. Moreover, long term stability (%R = 61.41 ± 1.66) for 30 days and high selectivity in the presence of other gases against HCHO suggested that the proposed sensor could be an ideal candidate for future commercial HCHO-sensing in a real environment.

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“…Electrochemical exfoliation method The Ni/Ni(OH) 2 particles disperse either on the outer surface of the graphene or enclosed by the graphene 1168 F g À 1 (10 mA cm À 2 ) [21] NiO@Ni(OH) 2-α-MoO 3…”

Section: Hydrothermal Reactionmentioning

confidence: 99%

Core‐shell Nanofiber‐based Electrodes for High‐performance Asymmetric Supercapacitors

Fan

2023

ChemistrySelect

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Supercapacitors are considered as important energy conversion and storage devices, and one-dimensional carbon nanofibers derived from electrospinning have been widely applied for supercapacitor electrode materials. The integration of carbon and metal hydroxide materials has become particularly important in order to pursue their higher electrochemical properties. In this paper, a one-dimensional core-shell electrode with Ni(OH) 2 as shell and carbon nanofibers as core (Ni/CNFs@Ni-(OH) 2 ) was fabricated by electrospinning, high-temperature carbonization and hydrothermal synthesis. This electrode exhibited high energy storage performance (785 F g À 1 (1 A g À 1 )), good coulombic efficiency and cycling stability. Furthermore, the asymmetric supercapacitor (ASC) assembled with activated carbons as negative electrode and Ni/CNFs@Ni(OH) 2 as positive electrode demonstrated a good energy storage performance (62.5 F g À 1 (1.6 V)). Meanwhile, this ASC displayed a significant energy density of 22.2 Wh kg À 1 at 800 W kg À 1 and an outstanding rate capability, indicating that Ni/CNFs@Ni(OH) 2 had a high potential application value in supercapacitors.

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Hybrid supercapacitor based on graphene and Ni/Ni(OH)2 nanoparticles formed by a modified electrochemical exfoliation method

Cited by 17 publications

References 33 publications

Free-standing hybrid material of Cu/Cu₂O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

Free-standing hybrid material of Cu/Cu₂O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

A novel room-temperature formaldehyde gas sensor based on walnut-like WO3 modification on Ni–graphene composites

Core‐shell Nanofiber‐based Electrodes for High‐performance Asymmetric Supercapacitors

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Hybrid supercapacitor based on graphene and Ni/Ni(OH)2 nanoparticles formed by a modified electrochemical exfoliation method

Cited by 17 publications

References 33 publications

Free-standing hybrid material of Cu/Cu2O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

Free-standing hybrid material of Cu/Cu2O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

A novel room-temperature formaldehyde gas sensor based on walnut-like WO3 modification on Ni–graphene composites

Core‐shell Nanofiber‐based Electrodes for High‐performance Asymmetric Supercapacitors

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Free-standing hybrid material of Cu/Cu₂O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection

Free-standing hybrid material of Cu/Cu₂O/CuO modified by graphene with commercial Cu foil using for non-enzymatic glucose detection