Thermoelectric properties of solution-combustion-processed Na(Co1−xNix)2O4

Park, K.; Choi, Junho; Lee, Ga Won; Kim, S. J.; Lim, Young Soo; Choi, Soon‐Mok; Seo, Won Seon; Lim, Sun-Weon

doi:10.1007/s12540-012-6021-4

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…Different approaches are used to improve the thermoelectric and other functional properties of Na x CoO 2 : (i) doping strategy (in sublattices of sodium [24,25] or cobalt [26][27][28][29]), (ii) modification strategy (by metals [30,31], reduced graphene oxide [32], etc. ), and (iii) microstructure regulation strategy [33][34][35], etc.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermoelectric Performance of Na0.55CoO2 Ceramics Doped by Transition and Heavy Metal Oxides

Krasutskaya,

Klyndyuk,

Evseeva

et al. 2024

Solids

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Using the solid-state reactions method Na0.55(Co,M)O2 (M = Cr, Ni, Zn, W, and Bi) ceramics were prepared and their crystal structure, microstructure, electrophysical, thermophysical, and thermoelectric properties were studied. Doping of Na0.55CoO2 by transition or heavy metal oxides led to the increase in the grain size of ceramics, a decrease in electrical resistivity and thermal diffusivity values, and a sharp increase in the Seebeck coefficient, which resulted in essential enhancement of their thermoelectric properties. The largest power factor (1.04 mW/(m·K2) at 1073 K) and figure of merit (0.702 at 1073 K) among the studied samples possessed the Na0.55Co0.9Bi0.1O2 compound, which also demonstrated the highest values of the Seebeck coefficient (666 μV/K at 1073 K). The obtained results show that the doping of layered sodium cobaltite by different metal oxides allows for improving its stability, microstructure, and functional properties, which proves the effectiveness of the doping strategy for developing new thermoelectric oxides with enhanced thermoelectric performance.

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Section: Introductionmentioning

confidence: 99%

Enhanced Thermoelectric Performance of Na0.55CoO2 Ceramics Doped by Transition and Heavy Metal Oxides

Krasutskaya,

Klyndyuk,

Evseeva

et al. 2024

Solids

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“…The usual thermoelectric materials are alloys of chalcogenides (Bi 2 Te 3 , PbTe , skutterudites, clathrates, half-Heuslers, and oxides. Some of these materials have limited for high temperature power generation applications due to require expensive surface protection to prevent oxidation and vaporization during operation and containing harmful elements [11][12][13]. Practical applications of these materials are therefore limited.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Nickel and Boron Co-Substituted NaCo<sub>2</sub>O<sub>4</sub> Prepared by Electrospinning Technique

Erdal

Koyuncu

Aksu

et al. 2018

NHC

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In this study nickel and boron doped sodium cobalt oxide NaCo2-xNixByO4 (0≤x≤0.3, 0≤y≤0.1) nanocrystalline thermoelectric ceramic powders were synthesized using electrospinning techniques and then consolidated into bulk ceramics. The differences in the microstructure and thermoelectric properties of the samples as a result of doping effect have been investigated. The crystalline structures of the powders and nanofibers were characterized using X-ray diffraction and scanning electron microscopy and BET Analysis before and after the calcination process at different temperatures. Nanofibers prepared by the use of electrospinning technique, have a diameter of approximately 300 nm, and the diameter of the grains of calcined powders was observed to range between 150 to 500 nanometers. Thermoelectric properties of the bulk ceramics were measured by physical properties measurement system (Lot-Oriel PPMS) in a temperature range of 15–300 K. The calculated values of dimensionless figure of merit at 300 K are 4.25×10-5, 5.3×10-6, 8.6×10-5 and 9×10-6 for sintered powders from undoped, Ni and B doped powders, respectively.

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Oxide Cobaltites

2019

Oxide Thermoelectric Materials

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Thermoelectric properties of solution-combustion-processed Na(Co1−xNix)2O4

Cited by 5 publications

References 24 publications

Enhanced Thermoelectric Performance of Na0.55CoO2 Ceramics Doped by Transition and Heavy Metal Oxides

Enhanced Thermoelectric Performance of Na0.55CoO2 Ceramics Doped by Transition and Heavy Metal Oxides

Thermoelectric Properties of Nickel and Boron Co-Substituted NaCo<sub>2</sub>O<sub>4</sub> Prepared by Electrospinning Technique

Oxide Cobaltites

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