Facile preparation of carbon-coated Mg nanocapsules as light microwave absorber

Liu, Xianguo; Wu, Niandu; Cui, Caiyun; Li, Yongtao; Zhou, Pingping; Bi, Nannan

doi:10.1016/j.matlet.2015.02.095

Cited by 21 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inspired by the theory on transmission line [9][10][11], the reflection loss of single-layer plate absorber can be derived from the permittivity and permeability with the following equations:…”

Section: Microwave Absorbing Features Of Ferrite/resin Compositementioning

confidence: 99%

See 1 more Smart Citation

Microwave Absorbing Features of Ce2(Co0.3Fe0.7)17/Ferrite Coating Material

Wang¹,

Lu²

2019

RCMA

View full text Add to dashboard Cite

This paper attempts to combine Ce2(Co0.3Fe0.7)17 and Co2Z-type hexagonal ferrite (hereinafter referred to the ferrite) into a composite with excellent absorbing properties. Firstly, the permittivity and permeability spectra of Ce2(Co0.3Fe0.7)17/epoxy resin composite were investigated, so were those of the ferrite/epoxy resin composite. On this basis, the author prepared coaxial Ce2(Co0.3Fe0.7)17/ferrite/epoxy resin composite specimens at different volume ratios of the Ce2(Co0.3Fe0.7)17 particles and the ferrite particles, and also studied their permittivity and permeability spectra in the frequency range of 8~18 GHz. In this way, the optimal volume ratios of both types of particles were determined for the composite. Through the analysis, it is concluded that, based on the matrix of epoxy resin and polyamide, the singlelayer plate absorber specimens can control the reflection loss within -10dB across the frequency range 8~18GHz, when the thickness is 1.1 mm, the fraction volume of Ce2(Co0.3Fe0.7)17 is 25 % and the fraction volume of ferrite is 20 %.

show abstract

Section: Microwave Absorbing Features Of Ferrite/resin Compositementioning

confidence: 99%

“…According to the theories on transmission line and quarter wavelength [9][10][11][12], the properties of absorbents (e.g. thickness) are heavily influenced by permittivity and permeability.…”

Section: Introductionmentioning

confidence: 99%

Microwave Absorbing Features of Ce2(Co0.3Fe0.7)17/Ferrite Coating Material

Wang¹,

Lu²

2019

RCMA

View full text Add to dashboard Cite

show abstract

“…Magnesium (Mg)-hydrides are considered promising hydrogen-storage materials due to their high theoretical hydrogen capacity of ∼7.6 wt%, low-cost, and good reversibility (Cao et al, 2015;Liu X. et al, 2015;Ding et al, 2017;Møller et al, 2017;Schneemann et al, 2018), even as compared to other high H-content complex hydrides (Zheng et al, 2008;Li et al, 2011Li et al, , 2014aLiu D. M. et al, 2015). As solid-state hydrogen storage media, their application is still hampered by a large reaction enthalpy of ∼76 kJ• mol −1 H 2 for desorption (Si et al, 2018), high activation barrier, and slow hydrogen atom diffusion (Paskevicius et al, 2010), which result in higher desorption temperature and sluggish kinetics.…”

Section: Introductionmentioning

confidence: 99%

Activity-Tuning of Supported Co–Ni Nanocatalysts via Composition and Morphology for Hydrogen Storage in MgH2

Ding

Ding²,

Song

et al. 2020

Front. Chem.

Self Cite

View full text Add to dashboard Cite

Developing cheap metal nanocatalysts with controllable catalytic activity is one of the critical challenges for improving hydrogen storage in magnesium (Mg). Here, it is shown that the activity of graphene-anchored Co-Ni nanocatalysts can be regulated effectively by tuning their composition and morphology, which results in significantly improved hydrogen storage in Mg. The catalytic activity of supported Co-Ni nanocatalysts is demonstrated to be highly dependent on their morphology and composition. When Ni was partly substituted by Co, the shape of these nanocatalysts was changed from spherical to plate-like, thus corresponding to a decrease in activity. These alterations intrinsically result in enhanced hydrogen storage properties of MgH 2 , i.e., not only does it exhibit a decreased peak desorption temperature but also a positive change in the initial activation for sorption. The results obtained provide a deep understanding of the tuning of catalytic activity via composition and morphology and further provide insights into improving hydrogen storage in Mg-based materials.

show abstract

“…1,2 However, the unfavorable capacity and rate performance of existing material blocks further practical application in electric vehicles, thus exploring novel anode materials with high performance is desired. [3][4][5] Many reports have demonstrated that the invoked electrochemical performance of anode materials depends on choosing an appropriate material with optimized morphology. [6][7][8][9][10] The material component is the rst important factor for advanced LIBs anodes.…”

Section: Introductionmentioning

confidence: 99%

“…11 Sn, Sb, Ge, Si and Ga metal candidates, which can alloy with Li, seem to be the optimal choice. Ga exhibits a unique liquid nature at room temperature with reported self-healing ability, [12][13][14][15] which can repair electrode cracks by surface tension upon lithiation reactions. 16 Moreover, the alloy reactions between Li and Ga undergo the following reversible process: Ga 4 Li 2 Ga 7 4 LiGa 4 Li 2 Ga, 17 thus delivering a theoretical capacity of $768 mA h g À1 from Li 2 Ga, about twice as much as commercial graphite anode.…”

Section: Introductionmentioning

confidence: 99%