Time-Enhanced Performance of Oxide Thermoelectric Modules Based on a Hybrid p–n Junction

Kanas, Nikola; Bjørk, Rasmus; Wells, Kristin Høydalsvik; Schuler, Raphael; Einarsrud, Mari Ann; Pryds, Nini; Wiik, Kjell

doi:10.1021/acsomega.0c04134

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…Several groups have reported CaMnO3-based oxide thermoelectric modules where doped and un-doped CaMnO3 were used as n-type elements. Table 1 summarizes the perovskite CaMnO3-based thermoelectric module reported in the literature based on power output [71][72][73][74][75][76][77][78][79][80][81][82]. The thermoelectric module, in combination with CaMnO3 as an n-type element and Ca3Co4O9 or doped-Ca3Co4O9 as the p-type element, is the most efficient device reported to date.…”

Section: Perovskite Oxide-based Thermoelectric Modulementioning

confidence: 99%

Perovskite Oxide Thermoelectric Module - A Way Forward

Nag

2023

Catal Res

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In the era of renewable and sustainable energy, perovskite materials remain pioneers as energy harvesting materials, be it thermoelectric waste heat harvesting or photovoltaic solar cell application. Oxide perovskite material is an emerging thermoelectric material in solving energy shortage issues through waste heat recovery. The chemical and structural stabilities, oxidation resistance, and cost-effective and straightforward manufacturing process are a few advantages of the oxide-based thermoelectric materials. The perovskite thermoelectric materials and module thereof does not require any vacuum bagging for operation at high temperature, irrespective of the application environment. Perovskite CaMnO3 displays a high Seebeck coefficient (S~-350 μV/K) due to correlated electron structure and low thermal conductivity (3 W m-1 K-1) but high electrical resistivity simultaneously. The electrical resistivity of CaMnO3 can be tuned by electron doping at the Ca-site and Mn-site. Electron doping by substituting Mn3+ with trivalent rare-earth ions increases the carrier concentration in the CaMnO3 system by partially reducing Mn4+ to Mn3+, improving electrical conductivity without altering the Seebeck coefficient. The dual-doped Ca1-xYbx/2Lux/2MnO3-based n-type perovskite thermoelectric material showed a much higher power factor than undoped CaMnO3 and proved to be an efficient perovskite from the application point of view. The thermoelectric module, in combination with CaMnO3 as an n-type element and Ca3Co4O9 or doped-Ca3Co4O9 as the p-type element, is the most efficient device reported to date. The lab-scale power generation experiment is carried out for 4-element and 36-element modules consisting of perovskite Ca1-xYbx/2Lux/2MnO3 as n-type elements and Ca3Co4O9 as p-type elements. The results showed the challenges of up-scaling the perovskite module for high-temperature waste heat harvesting applications.

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Section: Perovskite Oxide-based Thermoelectric Modulementioning

confidence: 99%

Perovskite Oxide Thermoelectric Module - A Way Forward

Nag

2023

Catal Res

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“…Thermoelectric (TE) power generation offers an attractive route for the direct conversion of heat into electric power and is considered to be an important component of a sustainable future energy mix . Practical TE modules use p- and n-type semiconductors coupled together electrically in series and thermally in parallel . The performance of TE materials is estimated by the dimensionless figure of merit zT : Here, S (V/K) is the Seebeck coefficient, ρ (Ω·m) is the electrical resistivity, κ [κ el + κ lattic ] (W/m·K) is the thermal conductivity (sum of the electronic and lattice thermal conductivities), PF (W/m·K 2 ) is the power factor, and T ( K ) is the absolute temperature.…”

Section: Introductionmentioning

confidence: 99%

“…2 Practical TE modules use p-and n-type semiconductors coupled together electrically in series and thermally in parallel. 3 The performance of TE materials is estimated by the dimensionless figure of merit zT:…”

Section: Introductionmentioning

confidence: 99%

Ba_2–xBi_xCoRuO₆ (0.0 ≤ x ≤ 0.6) Hexagonal Double-Perovskite-Type Oxides as Promising p-Type Thermoelectric Materials

et al. 2021

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A new series of Ba 2−x Bi x CoRuO 6 (0.0 ≤ x ≤ 0.6) hexagonal double perovskite oxides have been synthesized by a solid-state reaction method by substituting Ba with Bi. The polycrystalline materials are structurally characterized by the laboratory X-ray diffraction, synchrotron X-ray, and neutron powder diffraction. The lattice parameters are found to increase with increasing Bi doping despite the smaller ionic radius of Bi 3+ compared to Ba 2+ . The expansion is attributed to the reduction of Co/Rusite cations. Scanning electron microscopy further shows that the grain size increases with the Bi content. All Ba 2−x Bi x CoRuO 6 (0.0 ≤ x ≤ 0.6) samples exhibit p-type behavior, and the electrical resistivity (ρ) is consistent with a small polaron hopping model. The Seebeck coefficient (S) and thermal conductivity (κ) are improved significantly with Bi doping. High values of the power factor (PF ∼ 6.64 × 10 −4 W/m• K 2 ) and figure of merit (zT ∼ 0.23) are obtained at 618 K for the x = 0.6 sample. These results show that Bi doping is an effective approach for enhancing the thermoelectric properties of hexagonal Ba 2−x Bi x CoRuO 6 perovskite oxides.

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“…TEGs' structure and appropriate material combination also play an important role in improving their power output. Kanas reported an enhancement of a TEG's power output to 28.9 mW/cm 2 by improving the p-n junction and the cell design (Kanas et al, 2020). Lim reported a comparable power density of 93.2 mW/cm 2 in a TEG based on Ca3Co4O9, CaMnO3, and (Zn)7In2O3 materials and found that the contact resistance between electrode materials greatly affected the power output of the TEG in high-temperature regions (Lim et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Theoretical Power Output of Thermoelectric Power Generator based on Metal Oxide Semiconductor

Roseny¹,

Sathiyamoorthy²,

Sabri³

et al. 2021

IJTech

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Optimizing the structure and material combination of thermoelectric power generators (TEGs) is essential to their efficiency. In order to develop an efficient TEG based on an oxide semiconductor, we theoretically simulated the power output of a TEG based on potential oxide semiconductors (ZnO, TiO2, and CuO) combined with electrode materials (Au, Ag, Cu, graphene, graphite, ITO, IZO, and AZO), and determined the influence of this material combination on the TEG's power output. In this study, the power output was evaluated from simulated heat distribution and output voltage of a single leg and thermopiles using a simulator. The combination of ZnO and graphene showed the highest power output. This is likely due to the high thermal conductivity of graphene which allowed a high temperature difference in the ZnO. Moreover, the power output increased with decreasing electrode thickness, which allowed high output voltage to be generated by the thermoelectric material. The power density of the TEG consisting of several thermopiles based on ZnO and graphene materials was 29 mW/cm 2 , which was comparable with that of the reported TEG consisting of Te-based materials. Thus, a TEG based on oxide semiconductor materials could be developed to reduce the use of harmful thermoelectric materials.

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Time-Enhanced Performance of Oxide Thermoelectric Modules Based on a Hybrid p–n Junction

Cited by 7 publications

References 34 publications

Perovskite Oxide Thermoelectric Module - A Way Forward

Perovskite Oxide Thermoelectric Module - A Way Forward

Ba_2–xBi_xCoRuO₆ (0.0 ≤ x ≤ 0.6) Hexagonal Double-Perovskite-Type Oxides as Promising p-Type Thermoelectric Materials

Theoretical Power Output of Thermoelectric Power Generator based on Metal Oxide Semiconductor

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Time-Enhanced Performance of Oxide Thermoelectric Modules Based on a Hybrid p–n Junction

Cited by 7 publications

References 34 publications

Perovskite Oxide Thermoelectric Module - A Way Forward

Perovskite Oxide Thermoelectric Module - A Way Forward

Ba2–xBixCoRuO6 (0.0 ≤ x ≤ 0.6) Hexagonal Double-Perovskite-Type Oxides as Promising p-Type Thermoelectric Materials

Theoretical Power Output of Thermoelectric Power Generator based on Metal Oxide Semiconductor

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Ba_2–xBi_xCoRuO₆ (0.0 ≤ x ≤ 0.6) Hexagonal Double-Perovskite-Type Oxides as Promising p-Type Thermoelectric Materials