Thermoelectric properties of a doped LaNiO3 perovskite system prepared using a spark-plasma sintering process

Tak, Jang-Yeul; Choi, Soon‐Mok; Seo, Won‐Seon; Cho, Hyung Koun

doi:10.1007/s13391-013-0034-0

Cited by 11 publications

(6 citation statements)

References 13 publications

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“…Similar temperature dependencies of the thermopower with a minimum at ∼650–900 K were previously observed for La 2 NiO 4+δ - and LaNiO 3−δ -based materials − and attributed to the changes in oxygen content, e.g., the minimum of Seebeck coefficient of La 2 NiO 4+δ corresponds to the maximum oxygen content and, therefore, highest concentration of Ni 3+ charge carriers . Most likely, this is also the case for Ca x BaGd 2– x NiO 5 materials; however, additional structural and thermogravimetric studies are necessary to uncover the relevant mechanisms behind this behavior.…”

Section: Resultssupporting

confidence: 80%

“…In contrast to the current materials, in general, nickelates have previously been considered to be unsuitable for thermoelectric applications, predominantly due to very low Seebeck coefficients. As an example, maximum absolute values for La 2 NiO 4+δ - and LaNiO 3−δ -based systems usually do not exceed 20 μV/K, − being almost 10 times lower than those obtained in the present work. This striking result is likely to be promoted by the interplay of low dimensionality and electronic correlations in Haldane gap materials, making them attractive as thermoelectrics.…”

Section: Resultscontrasting

confidence: 78%

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Exploring the Thermoelectric Performance of BaGd₂NiO₅ Haldane Gap Materials

et al. 2017

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One-dimensional Haldane gap materials, such as the rare earth barium chain nickelates, have received great interest due to their vibrant one-dimensional spin antiferromagnetic character and unique structure. Herein we report how these 1D structural features can also be highly beneficial for thermoelectric applications by analysis of the system CaBaGdNiO 0 ≤ x ≤ 0.25. Attractive Seebeck coefficients of 140-280 μV K at 350-1300 K are retained even at high acceptor-substitution levels, provided by the interplay of low dimensionality and electronic correlations. Furthermore, the highly anisotropic crystal structure of Haldane gap materials allows very low thermal conductivities, reaching only 1.5 W m K at temperatures above 1000 K, one of the lowest values currently documented for prospective oxide thermoelectrics. Although calcium substitution in BaGdNiO increases the electrical conductivity up to 5-6 S cm at 1150 K < T < 1300 K, this level remains insufficient for thermoelectric applications. Hence, the combination of highly promising Seebeck coefficients and low thermal conductivities offered by this 1D material type underscores a potential new structure type for thermoelectric materials, where the main challenge will be to engineer the electronic band structure and, probably, microstructural features to further enhance the mobility of the charge carriers.

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Section: Resultssupporting

confidence: 80%

Section: Resultscontrasting

confidence: 78%

Exploring the Thermoelectric Performance of BaGd₂NiO₅ Haldane Gap Materials

et al. 2017

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“…Since the increase in the charge valence of a metal ion can be counterbalanced by an equivalent decrease in the formation of oxygen vacancies, Cu doping into Ni ion sites can prohibit the formation of oxygen vacancies. A power factor of 40 µW·K −2 ·m −1 was achieved for LaNi 0.8 Cu 0.2 O 3 at 600 K [140]. …”

Section: Oxide Perovskitesmentioning

confidence: 99%

Development of Perovskite-Type Materials for Thermoelectric Application

2018

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Oxide perovskite materials have a long history of being investigated for thermoelectric applications. Compared to the state-of-the-art tin and lead chalcogenides, these perovskite compounds have advantages of low toxicity, eco-friendliness, and high elemental abundance. However, because of low electrical conductivity and high thermal conductivity, the total thermoelectric performance of oxide perovskites is relatively poor. Variety of methods were used to enhance the TE properties of oxide perovskite materials, such as doping, inducing oxygen vacancy, embedding crystal imperfection, and so on. Recently, hybrid perovskite materials started to draw attention for thermoelectric application. Due to the low thermal conductivity and high Seebeck coefficient feature of hybrid perovskites materials, they can be promising thermoelectric materials and hold the potential for the application of wearable energy generators and cooling devices. This mini-review will build a bridge between oxide perovskites and burgeoning hybrid halide perovskites in the research of thermoelectric properties with an aim to further enhance the relevant performance of perovskite-type materials.

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“…thick LNO and 1.5 u.c. LCO layers, the parallel slab model, using the data of LNO and LCO single-phase films with the corresponding thickness, is not applicable because of the strong Cu–Ni intermixing, where the sign change of the Seebeck coefficient from negative to positive in LNO–LCO heterostructures with very thin LNO and LCO layers was explained by a substitutional solid solution , with the 214 structure. Also, the temperature anomaly at the same temperature range is due to oxygen exchange between the 214 structure and oxygen atmosphere.…”

Section: Resultsmentioning

confidence: 99%

High-Temperature Thermoelectricity in LaNiO₃–La₂CuO₄ Heterostructures

Kaya

Gregori

Baiutti

et al. 2018

ACS Appl. Mater. Interfaces

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Transition metal oxides exhibit a high potential for application in the field of electronic devices, energy storage, and energy conversion. The ability of building these types of materials by atomic layer-by-layer techniques provides a possibility to design novel systems with favored functionalities. In this study, by means of the atomic layer-by-layer oxide molecular beam epitaxy technique, we designed oxide heterostructures consisting of tetragonal KNiF-type insulating LaCuO (LCO) and perovskite-type conductive metallic LaNiO (LNO) layers with different thicknesses to assess the heterostructure-thermoelectric property-relationship at high temperatures. We observed that the transport properties depend on the constituent layer thickness, interface intermixing, and oxygen-exchange dynamics in the LCO layers, which occurs at high temperatures. As the thickness of the individual layers was reduced, the electrical conductivity decreased and the sign of the Seebeck coefficient changed, revealing the contribution of the individual layers where possible interfacial contributions cannot be ruled out. High-resolution scanning transmission electron microscopy investigations showed that a substitutional solid solution of La(CuNi)O was formed when the thickness of the constituent layers was decreased.

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Thermoelectric properties of a doped LaNiO3 perovskite system prepared using a spark-plasma sintering process

Cited by 11 publications

References 13 publications

Exploring the Thermoelectric Performance of BaGd₂NiO₅ Haldane Gap Materials

Exploring the Thermoelectric Performance of BaGd₂NiO₅ Haldane Gap Materials

Development of Perovskite-Type Materials for Thermoelectric Application

High-Temperature Thermoelectricity in LaNiO₃–La₂CuO₄ Heterostructures

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Thermoelectric properties of a doped LaNiO3 perovskite system prepared using a spark-plasma sintering process

Cited by 11 publications

References 13 publications

Exploring the Thermoelectric Performance of BaGd2NiO5 Haldane Gap Materials

Exploring the Thermoelectric Performance of BaGd2NiO5 Haldane Gap Materials

Development of Perovskite-Type Materials for Thermoelectric Application

High-Temperature Thermoelectricity in LaNiO3–La2CuO4 Heterostructures

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Exploring the Thermoelectric Performance of BaGd₂NiO₅ Haldane Gap Materials

Exploring the Thermoelectric Performance of BaGd₂NiO₅ Haldane Gap Materials

High-Temperature Thermoelectricity in LaNiO₃–La₂CuO₄ Heterostructures