Effect of low magnetic fields on the morphology and electrochemical properties of MnO2 films on nickel foams

Zhu, Tao; He, Zhenni; Zhang, Guoxiong; Lu, Yisheng; Lin, Cheng-Ju; Chen, Yigang; Guo, Haibo

doi:10.1016/j.jallcom.2015.04.185

Cited by 17 publications

(10 citation statements)

References 49 publications

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“…The presence of the sole (101) reflection irrespective of the used substrate suggested the occurrence of a (101) preferential orientation and/or of anisotropic crystallite growth [23,34,44]. The relatively weak and broad diffraction peaks, as often observed in the case of supported MnO 2 films/nanosystems [9,10,13,14,22,33], suggested the formation of defective nanocrystallites, whose average dimensions were comprised between 25 and 35 nm ( Figure S3).…”

Section: Resultsmentioning

confidence: 85%

Plasma-Assisted Chemical Vapor Deposition of F-Doped MnO2 Nanostructures on Single Crystal Substrates

et al. 2020

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MnO2 nanostructures were fabricated by plasma assisted-chemical vapor deposition (PA-CVD) using a fluorinated diketonate diamine manganese complex, acting as single-source precursor for both Mn and F. The syntheses were performed from Ar/O2 plasmas on MgAl2O4(100), YAlO3(010), and Y3Al5O12(100) single crystals at a growth temperature of 300 °C, in order to investigate the substrate influence on material chemico-physical properties. A detailed characterization through complementary analytical techniques highlighted the formation of highly pure and oriented F-doped systems, comprising the sole β-MnO2 polymorph and exhibiting an inherent oxygen deficiency. Optical absorption spectroscopy revealed the presence of an appreciable Vis-light harvesting, of interest in view of possible photocatalytic applications in pollutant degradation and hydrogen production. The used substrates directly affected the system structural features, as well as the resulting magnetic characteristics. In particular, magnetic force microscopy (MFM) measurements, sensitive to the out-of-plane magnetization component, highlighted the formation of spin domains and long-range magnetic ordering in the developed materials, with features dependent on the system morphology. These results open the door to future engineering of the present nanostructures as possible magnetic media for integration in data storage devices.

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Section: Resultsmentioning

confidence: 85%

Plasma-Assisted Chemical Vapor Deposition of F-Doped MnO2 Nanostructures on Single Crystal Substrates

et al. 2020

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“…To date, there are two main applications relying on magnetic field for supercapacitors. The first one is using magnetic field to drive nanostructured materials self‐assembly, and the second one is introducing magnetic field into the electrochemical testing process to enhance capacitive performance . Both of these two aspects have been investigated extensively, and the details are as following.…”

Section: Electrode Fabrication Techniques Based On Magnetic Fieldmentioning

confidence: 99%

“…In addition, Liu et al demonstrated that the 1D wire‐like NiO/Co 3 O 4 composites could be fabricated by a simple magnetic field‐assisted hydrothermal method, which indicated that these magnetic Ni/Co nanoparticles were assembled into a chainlike structure along the direction of magnetic force line under the magnetic interaction, thus forming a 1D wire‐like Ni/Co alloys . Zhu et al reported that a nanostructured MnO 2 film could be deposited onto nickel foams by a hydrothermal synthesis route under a low magnetic field, which exhibited a specific capacitance of 493.0 F g −1 at 2.0 A g −1 and a retention ratio of 95.6% over 1000 cycles . A probable formation mechanism for the nanostructured MnO 2 was proposed in which magnetic field acted as a force field with strong vibration and destruction abilities.…”

Section: Electrode Fabrication Techniques Based On Magnetic Fieldmentioning

confidence: 99%

Fabrication and Engineering of Nanostructured Supercapacitor Electrodes Using Electromagnetic Field‐Based Techniques

Lai

Wang

et al. 2017

Adv Materials Technologies

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Over the last decade, significant efforts have been made to develop electrode architectures of the electrochemical energy storage (EES) devices. The involvement of electrostatic field, magnetic field, and electromagnetic field for electrode fabrication plays a vital role to enhance performance of supercapacitors in comparison with conventional roots. Electromagnetic techniques are advantageous over others because of several reasons including material's interactions at molecular level, noncontact energy, and chemical transportations to extract physical phase changings, and large‐scale production with a cost‐effective way. Recently, these techniques became a powerful tool for constructing hierarchical and well‐ordered nanostructured electrodes. Their novel mechanisms and forms show high efficiency with numerous advantages such as green, simple, and mild reaction conditions. Herein, recent progress involving electromagnetic techniques for supercapacitor is reviewed; their potential future applications are also highlighted. The present review aims to serve as a guideline for fabrication techniques of next generation supercapacitor electrodes.

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“…To develop high performance supercapacitors, recent researches have focused on low fabrication cost, high energy density and environmentally benign materials [4][5][6][7]. Manganese oxides in various forms have been extensively studied as electrode materials for supercapacitors, owing to their high energy density, abundance of raw materials, and environmental friendly feature [8][9][10][11][12][13][14][15]. However, the performance of Manganese oxides as pseudocapacitor material is hindered by their poor electrical conductivity and mechanical instability [16].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Manganese oxide Films for High performance Supercapacitors

Fang¹

2018

International Journal of Electrochemical Science

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Nanostructured manganese oxide films, including continuous coating, nanoflower film and nanowall array, were electrodeposited on nickel foils via anodic electrodeposition. The as-prepared samples were tested as electrodes for supercapacitors and excellent capacitive performances were achieved. Among them, the nanowall array, which was composed of interconnected ultrathin nanosheets, exhibited the highest specific capacitance of 327 F g-1 at 1 A g-1. The specific capacitance could retain as high as 317 F g-1 after 1000 cycles. The superior capacitance performance can be attributed to its unique nanoporous structure which facilitates fast ion transportation.

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Effect of low magnetic fields on the morphology and electrochemical properties of MnO2 films on nickel foams

Cited by 17 publications

References 49 publications

Plasma-Assisted Chemical Vapor Deposition of F-Doped MnO2 Nanostructures on Single Crystal Substrates

Plasma-Assisted Chemical Vapor Deposition of F-Doped MnO2 Nanostructures on Single Crystal Substrates

Fabrication and Engineering of Nanostructured Supercapacitor Electrodes Using Electromagnetic Field‐Based Techniques

Nanostructured Manganese oxide Films for High performance Supercapacitors

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