Last edited by Gunris
Wednesday, October 21, 2020 | History

4 edition of Properties of NaxCoO2 found in the catalog.

Properties of NaxCoO2

by Helia Jalili

  • 95 Want to read
  • 24 Currently reading

Published by Brock University, Dept. of Physics in St. Catharines, Ont .
Written in English

    Subjects:
  • Sodium cobalt oxide -- Thermal conductivity.,
  • Sodium cobalt oxide -- Thermomechanical properties.,
  • Superconductors.,
  • Thermoelectric materials.

  • Edition Notes

    Statementby Helia Jalili.
    The Physical Object
    Paginationx, 76 leaves :
    Number of Pages76
    ID Numbers
    Open LibraryOL23409168M

    In this article, we argue that in the recently discovered sodium cobalt oxyhydrate NAxCoO2 yH2O, the Co t2g orbitals play essential roles on the mechanism and properties of its superconductivity, and this material, thus, provides a precious example of the long-desired multiorbital superconductor. Through comprehensive density functional calculations, the crystallographic, magnetic and electronic properties of NaxCoO2 (x = 1, , , and ) were investigated. We found that all.

    - G. Li, L. Liang, Q. Li, M. Pan, V. B. Nascimento, X. He, A. B. Karki, V. Meunier, R. Jin, J. Zhang, E. W. Plummer, “Role of Antiferromagnetic Ordering in the. Finally, the book concludes by discussing selected examples of important applications of complex metal oxide thin films in Part Three. Provides valuable information on the improvements in epitaxial growth processes that have resulted in higher quality films of complex metal oxides and further advances in applications for electronic and optical.

    Mg 3 Sb 2 –Mg 3 Bi 2 alloys show excellent thermoelectric properties. The benefit of alloying has been attributed to the reduction in lattice thermal conductivity. However, Mg 3 Bi 2-alloying may also be expected to significantly change the electronic comparatively modeling the transport properties of n- and p-type Mg 3 Sb 2 –Mg 3 Bi 2 and also Mg 3 Bi 2-alloyed and non. Book Oxide Thermoelectrics (Collaboration) /05 2. Papers Thermogravimetric and desorbed-gas analyses of perovskite-type Ba(ZnxNb1-x)Oy(OH)z (Collaboration) /11 Enhanced thermoelectric properties of NaxCoO2 whisker crystals (Collaboration)


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Properties of NaxCoO2 by Helia Jalili Download PDF EPUB FB2

2 planes, giving rise to different properties as a function of x. The two-layer form of Na xCoO 2 has been of significant recent interest, as it displays a variety of inter-esting properties. In addition to the superconductivity in the hydrated phase, a large thermopower V/K at K has been found for x ,3 and attributed to the spin entropy.

The x= compound has one CoO2 layer per cell, with Na in octahedral coordination and an incommensurate superlattice. The x= and phases are also single layer, but the Na is found Cited by: Magnetic properties Abstract We prepared Na x CoO 2 (x = and ) compounds by novel synthetic routes, and measured their magnetic susceptibilities at various magnetic field : Hiroya Sakurai, Kazunori Takada, Takayoshi Sasaki, Eiji Takayama‐Muromachi.

Electrochemical properties of Na x CoO 2 (x~) cathode for rechargeable sodium-ion batteriesCited by:   Single-crystalline whiskers of thermoelectric cobalt oxide, NaxCoO2, have been grown by an unconventional method from potassium-containing compositions, and their transport properties Cited by:   The Na x CoO 2-δ single crystals are prepared by a flux technique, and the resulting flaky single crystals are very thin on the c -axis.

The in-plane electrical resistivity (ρ), the thermoelectric power (S) and the in-plane thermal conductivity (κ) are measured in the range of K to K.

We report here the synthesis of single-phase bulk samples of CoO2, the x = 0 end member of the AxCoO2 systems (A = Li, Na), from a pristine LiCoO2 sample using an electrochemical technique to completely de-intercalate lithium. Thus, synthesized CoO2 samples were found to be oxygen-stoichiometric and possess a crystal structure consisting of stacked triangular-lattice CoO2 layers.

The electronic structure and thermoelectric properties of Nax CoO2 ware calculated by using a full-potential linearized augmented plane-wave (FLAPW) method with a generalized gradient approximation (GGA).

The partial occupancy of Na ion was taken account by the virtual-crystal like approximation. properties as a function of x. The two-layer form of NaxCoO2 has been of significant recent interest, as it displays a variety of interesting properties.

In addition to the superconductivity in the hydrated phase, a large thermopower (µV/K at K) has been found for x~ and attributed to the spin entropy carried by strongly correlated.

We measured and analyzed the electrical resistivity (ρ), Hall coefficient (R H), Seebeck coefficient (S) and magnetic susceptibility (χ) of γ-phase Na CoO 2 and α-phase Na CoO 2 crystals prepared by solution growth using NaCl-Na 2 CO 3-B 2 O 3 ρ of α-phase Na CoO 2 (ρ α) is much higher than that of γ-phase Na CoO 2 (ρ γ), while the magnitude of S of α.

We have performed specific heat and electric resistivity measurements of Na x CoO 2 (x =–). Two anomalies have been observed in the specific heat data for x =, corresponding to magnetic transitions at T c =22 K and T k ≃9 K reported previously.

In the electrical resistivity, a steep decrease at T c and a bending-like variation at T b (= K for x =) have been observed. Lightweight Hierarchical Carbon Nanocomposites with Highly Efficient and Tunable Electromagnetic Interference Shielding Properties; Enantioselective Determination of Protein Amino Acids in Fertilizers by Liquid Chromatography–Tandem Mass Spectrometry on Chiral Teicoplanin Stationary Phase.

Comprehensive studies of the electrical and thermal properties of NaxCoO2−y cathode material in the characteristic points of the discharge curve i.e.

on the pseudo-plateaus and on the potential. For the thermoelectric properties of NaxCoO2, we analyze the effect of local Coulomb interaction and (disordered) potential differences for Co sites with adjacent Na ion or vacancy.

Unparalleled in the breadth and depth of its coverage of all important aspects, this book systematically treats the electronic and magnetic properties of stoichiometric and non-stoichiometric cobaltites in both ordered and disordered phases.

The material exhibits strong anisotropy of lattice thermal conductivity due to a layered crystal structure and relatively weak bonding between layers. This structure leads to the possibility of manufacturing relatively large nanosheets of NaxCoO2.

The book presents various iron-based superconductors with different structures, such as,11 andDetailed single crystal growth methods (fluxes, Bridgman, floating zone), the associated procedures and their impact to crystal size and quality are presented.

For the thermoelectric properties of NaxCoO2, we analyze the effect of local Coulomb interaction and (disordered) potential differences for Co-sites with adjacent Na-ion or vacancy.

The disorder potential alone increases the resistivity and reduces the thermopower, while the Coulomb interaction alone leads only to minor changes compared to the one-particle picture of the local density. In this paper we would like to show a new approach to an explanation of the nature of the discharge–charge curve of Na/Na+/NaxCoO2−y batteries, which can justify the existence of the step-like characteristics.

This is still an open problem, which until now had no proper description in. Herein, Zn-doped Na x CoO 2 has been developed for the enhanced capacitive deionization (CDI) properties. The partial Co 3+ substituted by Zn 2+ can induce the appearance of electronic holes and effectively improve the electrical conductivity, which consequently is beneficial to the enhancement of the desalination performance.

Unparalleled in the breadth and depth of its coverage of all important aspects, this book systematically treats the electronic and magnetic properties of stoichiometric and non-stoichiometric cobaltites in both ordered and disordered phases.

Authored by a pioneer and a rising star in the field, the monograph summarizes, organizes and streamlines the otherwise difficult-to-obtain information on this topic.The paper reveals correlation between electronic structure, transport, and electrochemical properties of layered LixCoO2, LixNi1−y−zCoyMnzO2 and NaxCoO2 cathode material and explains of apparently different character of the discharge/charge curve in LixCoO2 (monotonous curve) and NaxCoO2 systems (step-like curve).Thermal and Electrical Properties of γ-NaxCoO2( ≤x≤).

Journal of the Physical Society of Japan. 73 [9] () /jpsj; Hiroya Sakurai, Satoshi Takenouchi, Naohito Tsujii, Eiji Takayama-Muromachi.

Synthesis, Characterization, and Magnetic Properties of γ-NaxCoO2(≤x≤). Journal of the Physical.