Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder
TL;DR: In this article, the effects of fluorination on the crystal structure, magnetic, and electrochemical properties of the P2-type NaxCoO2 powder were investigated for the first time.
About: This article is published in Journal of Alloys and Compounds.The article was published on 2019-02-05 and is currently open access. It has received 15 citations till now. The article focuses on the topics: Rietveld refinement & Fluorine.
Citations
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TL;DR: In this paper, an asymmetric Faradaic deionization (FDI) device assembled by Ca2+decorated NaxCoO2 (x ≤ 0.71, y ≥ 0.05) as the negative electrode and activated carbon as the positive electrode was developed.
Abstract: Faradaic deionization (FDI) provides an effective solution to respond to the global water crisis. However, the ions intercalation/deintercalation process with multiple redox reactions leads to structural collapse and unstable cyclability. Here, we develop an asymmetrical FDI device assembled by Ca2+-decorated NaxCoO2 (x ≤ 0.71, y ≤ 0.05) as the Faradaic negative electrode and activated carbon as the positive electrode. Na0.27Ca0.03CoO2·0.6H2O was synthesized via a facile sol–gel and chemical oxidation method, which delivered a desalination capacity of 83.5 ± 2.4 mg g–1 and a charge efficiency close to 1, and an inappreciable capacity fading was observed after 50 cycles. It is found that the presence of Ca2+ residing in the face-sharing sites helps to maintain the layered structure and promotes efficient deintercalation of Na+ by anchoring the CoO2 slabs, which results in its unexpected desalination capacity and good cyclability. Moreover, electrochemical quartz-crystal microbalance (EQCM) was successfully...
7 citations
TL;DR: In this paper , natural clay minerals palygorskite (PAL) and Na0.60CoO2 (NCO) nanosheets composite were synthesized via an electrostatic adsorption method, and used as the electrolyte of fuel cell.
2 citations
TL;DR: In this article, a P2-Na0.59Co0.20Mn0.75B0.05O2 (NCMB-05) cathode material has been developed by boron-doping through a solid-state reaction.
2 citations
TL;DR: In this article , the authors developed a convenient preparation method of NaxCoO2 nanoflakes via aqueous ultrasonic exfoliation of single crystals, and a sensor based on NaxcoO2 single crystals was fabricated, whose resistance is obviously smaller than that of the typical metal oxide based sensors.
2 citations
TL;DR: In this article , Fe and Co co-doped P2-type Na 0.67 MnO 2 cathode material prepared via different facile chemical routes to understand the effect of dopants and microstructure on its electrochemical cyclic stability.
References
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Journal Article•
28,685 citations
TL;DR: In this paper, a structure refinement method was described which does not use integrated neutron powder intensities, single or overlapping, but employs directly the profile intensities obtained from step-scanning measurements of the powder diagram.
Abstract: A structure refinement method is described which does not use integrated neutron powder intensities, single or overlapping, but employs directly the profile intensities obtained from step-scanning measurements of the powder diagram. Nuclear as well as magnetic structures can be refined, the latter only when their magnetic unit cell is equal to, or a multiple of, the nuclear cell. The least-squares refinement procedure allows, with a simple code, the introduction of linear or quadratic constraints between the parameters.
14,360 citations
TL;DR: Biesinger et al. as mentioned in this paper proposed a more consistent and effective approach to curve fitting based on a combination of standard spectra from quality reference samples, a survey of appropriate literature databases and/or a compilation of literature references and specific literature references where fitting procedures are available.
7,498 citations
"Effects of fluorination on the stru..." refers background in this paper
...7 eV can be assigned to a defective oxide or hydrated oxide [44]....
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