Enhanced thermoelectric properties of single phase Na doped NaXCoO2 thermoelectric material

被引：27

作者：

Akram, Rizwan ^{[1
]}

Khan, Jansher ^{[1
]}

Rafique, Saima ^{[2
]}

Hussain, Mozaffar ^{[2
]}

Maqsood, Asghari ^{[3
]}

Naz, Akhtar Ali ^{[1
]}

机构：

[1] Air Univ, Dept Phys, Thermoelect Mat Lab, Islamabad, Pakistan

[2] Air Univ, Dept Phys, Islamabad, Pakistan

[3] Air Univ, Dept Phys, Nanoscale Phys Lab, Islamabad, Pakistan

来源：

MATERIALS LETTERS | 2021年 / 300卷

关键词：

Sol-gel preparation; Thermal properties; Single phase; Thermoelectric material; THERMOPOWER; CRYSTAL;

D O I：

10.1016/j.matlet.2021.130180

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single-phase thermoelectric materials Sodium (Na) doped Cobalt Oxide NaxCoO2 (x = 1, 0.98, 0.96 and 0.94) were synthesized by the sol-gel method. Structural and morphological analysis of the prepared samples revealed excellent phase purity and high crystallinity. We found out that the direct current (DC) electrical conductivity was enhanced with the decrease in Na content, whereas, the thermal conductivity of the prepared samples increased slightly by decreasing the Na concentration. Seebeck coefficient was also increased and consequently, a figure of merit (zT) value of 1.24 was obtained at 1010 K which is about 28% improvement compared to the undoped sample.

引用

页数：4

共 18 条

[1]

[Anonymous], 2013, ADV APPL SCI RES

[2] Sodium intercalation in NaxCoO2-y - Correlation between crystal structure, oxygen nonstoichiometry and electrochemical properties [J].

Baster, Dominika ;

Dybko, Krzysztof ;

Szot, Michal ;

Swierczek, Konrad ;

Molenda, Janina .

SOLID STATE IONICS, 2014, 262 :206-210

[3] Lattice thermal conductivity in bulk and nanosheet NaxCoO2 [J].

Demchenko, D. O. ;

Ameen, D. B. .

COMPUTATIONAL MATERIALS SCIENCE, 2014, 82 :219-225

[4] Effect of Gelling Agent and Calcination Temperature in Sol-Gel Synthesized MgO Nanoparticles [J].

Jeevanandam, Jaison ;

Chan, Yen San ;

Danquah, Michael K. .

PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES, 2019, 55 (02) :288-301

[5] Porous carbon xerogels with texture tailored by pH control during sol-gel process [J].

Job, N ;

Pirard, R ;

Marien, J ;

Pirard, JP .

CARBON, 2004, 42 (03) :619-628

[6] Na-site substitution effects on the thermoelectric properties of NaCo2O4 [J].

Kawata, T ;

Iguchi, Y ;

Itoh, T ;

Takahata, K ;

Terasaki, I .

PHYSICAL REVIEW B, 1999, 60 (15) :10584-10587

[7] Synthesis and properties of Na x CoO2 (x=0.55, 0.89) oxide thermoelectrics [J].

Krasutskaya, N. S. ;

Klyndyuk, A. I. ;

Evseeva, L. E. ;

Tanaeva, S. A. .

INORGANIC MATERIALS, 2016, 52 (04) :393-399

[8] Enhancement of the thermopower in NaxCoO2 in the large-x regime (x≥0.75) [J].

Lee, Minhyea ;

Viciu, Lillana ;

Li, Lu ;

Wang, Yayu ;

Foo, M. L. ;

Watauchi, S. ;

Pascal, R. A., Jr. ;

Cava, R. J. ;

Ong, N. P. .

PHYSICA B-CONDENSED MATTER, 2008, 403 (5-9) :1564-1568

[9] Large enhancement of the thermopower in NaxCoO2 at high Na doping [J].

Lee, Minhyea ;

Viciu, Liliana ;

Li, Lu ;

Wang, Yayu ;

Foo, M. L. ;

Watauchi, S. ;

Pascal, R. A., Jr. ;

Cava, R. J. ;

Ong, N. P. .

NATURE MATERIALS, 2006, 5 (07) :537-540

[10] Synthesis and Stoichiometry of Different Layered Sodium Cobalt Oxides [J].

Lei, Yuechuan ;

Li, Xin ;

Liu, Lei ;

Ceder, Gerbrand .

CHEMISTRY OF MATERIALS, 2014, 26 (18) :5288-5296

← 1 2 →