Development of thermoelectric oxides for renewable energy conversion technologies

Weidenkaff, Anke; Robert, R.; Aguirre, Myriam H.; Bocher, Laura; Lippert, Thomas; Canulescu, Stela

doi:10.1016/j.renene.2007.05.032

Cited by 97 publications

(50 citation statements)

References 14 publications

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“…Thermoelectric conversion is usually performed by means of heat engines, e.g., Stirling motors [36,37] or organic Rankine cycle [38] turbines, or by means of solid-state modules based on the Seebeck effect [39][40][41]. However, the thermoelectric energy production from low-and medium-temperature sources is an active research field, in which innovative solutions are studied (see, for example [42]).…”

Section: Introductionmentioning

confidence: 99%

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

et al. 2014

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The conversion of heat into current can be obtained by a process with two stages. In the first one, the heat is used for distilling a solution and obtaining two flows with different concentrations. In the second stage, the two flows are sent to an electrochemical cell that produces current by consuming the concentration difference. In this paper, we propose such an electrochemical cell, working with water solutions of zinc chloride. The cell contains two electrodes, made respectively of zinc and silver covered by silver chloride. The operation of the cell is analogous to that of the capacitive mixing and of the "mixing entropy battery": the electrodes are charged while dipped in the concentrated solution and discharged when dipped in the diluted solution. The cyclic operation allows us to extract a surplus of energy, at the expense of the free energy of the concentration difference. We evaluate the feasibility of such a cell for practical applications and find that a power up to 2 W per m 2 of the surface of the electrodes can be achieved.

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Section: Introductionmentioning

confidence: 99%

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

et al. 2014

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“…Although doped CaMnO 3 66-68 is considered one of the important thermoelectric materials, there are few reports of thin film synthesis. 151,152 Interestingly, the idea of electron filtering to improve thermoelectric properties of superlattices was studied in the model system La 0. 67 …”

Section: Other Materialsmentioning

confidence: 99%

Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Ravichandran

2016

J. Mater. Res.

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Over the years, the search for high performance thermoelectric materials has been dictated by the "phonon glass and electron crystal (PGEC)" paradigm, which suggests that low band gap semiconductors with high atomic number elements and high carrier mobility are the ideal materials to achieve high thermoelectric figure of merit. Complex oxides provide alternative mechanisms such as large density of states and strong electron correlation for high thermoelectric efficiency, albeit having low carrier mobility. Due to vast structural and chemical flexibility, they provide a fertile playground to design high efficiency thermoelectric materials. Further, developments in oxide thin film growth methods have enabled synthesis of high quality, atomically precise low dimensional structures such as heterostructures and superlattices. These materials and structures act as excellent model systems to explore nanoscale thermal and thermoelectric transport, which will not only expand the frontier of our knowledge, but also continue to enable cutting edge applications.

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“…They have high electron and ionic (O 2-) conductivities and are considered for use as cathode materials in solid oxide fuel cells, oxygen permeable membranes and are effective in catalytic oxidation of CO and hydrocarbons. The amount of charge carriers and thus the electrical conductivity and thermoelectric properties in this system can be tuned by suitable Cosite and La-site substitution [13][14][15][16][17][18][19][20][21][22]. There has been substantial recent interest in strontium-doped rare earth perovskites (Ln 1-x Sr x CoO 3-δ ) as cathode materials for solid oxide fuels cells [19,[23][24][25][26][27][28], as an ideal substrate for the deposition of lead zirconium titanate (PZT) films [29], and as high temperature ceramic membranes [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Cizauskaite

Kareiva

2008

Open Chemistry

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This paper reports on the results concerning the sol-gel preparation and characterization of Sr-substituted perovskite lanthanum cobaltates La 1-x Sr x CoO 3-d (x = 0.0, 0.25, 0.5 and 0.75). The metal ions, generated by dissolving starting materials in diluted acetic acid were complexed by 1,2-ethanediol to obtain the precursors for the non-substituted and Sr-substituted LaCoO 3 . The influence of the synthesis temperature, heating time and the amount of substituent on the phase purity of La 1-x Sr x CoO 3-d were investigated. The phase transformations, composition and micro-structural features in the gels and polycrystalline samples were studied by thermal analysis (TG/DTA), infrared spectroscopy (IR), powder X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Development of thermoelectric oxides for renewable energy conversion technologies

Cited by 97 publications

References 14 publications

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

Thermoelectric and thermal transport properties of complex oxide thin films, heterostructures and superlattices

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

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