Exploring thermoelectric performance of Ca3Co4O9+δ ceramics via chemical electroless plating with Cu

Liu, Taoyi; Bao, Deyu; Wang, Yuan; Gao, Han; Zhou, Di; Han, Guang; Tang, Jun; Huang, Zhongwen; Yang, Lei

doi:10.1016/j.jallcom.2019.153522

Cited by 12 publications

(3 citation statements)

References 39 publications

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“…In particular, the satellite peak at 2p 1/2 is relatively weak, and Co 2+ dominates the surface samples. [48][49][50] The same is shown in Fe 2p X-ray photoelectron spectra (Fig. 3e) with characteristic peaks at 711.5 eV and 724.9 eV, which belong to Fe 2+ 2p 3/2 and Fe 2+ 2p 1/2 , while showing a characteristic peak of Fe 3+ 2p 3/2 at 715.4 eV.…”

Section: Resultssupporting

confidence: 73%

MOF-derived nanocarbon materials loaded with bimetallic sulfides as cathode catalysts for zinc–air batteries

Liu

Tang

et al. 2023

New J. Chem.

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Section: Resultssupporting

confidence: 73%

MOF-derived nanocarbon materials loaded with bimetallic sulfides as cathode catalysts for zinc–air batteries

Liu

Tang

et al. 2023

New J. Chem.

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“…Doping is one of the most effective strategies to enhance the TE performance by manipulation of carrier concentration. The carrier concentration could be optimized to 10 19 -10 21 cm -3 to achieve a high ZT value through doping various elements [1,8]. Although Refs.…”

Section: Introduction mentioning

confidence: 99%

Thermoelectric performance enhancement by manipulation of Sr/Ti doping in two sublayers of Ca3Co4O9

et al. 2020

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Thermoelectric (TE) performance of Ca3Co4O9 (CCO) has been investigated extensively via a doping strategy in the past decades. However, the doping sites of different sublayers in CCO and their contributions to the TE performance remain unrevealed because of its strong correlated electronic system. In this work, Sr and Ti are chosen to realize doping at the [Ca2CoO3] and [CoO2] sublayers in CCO. It was found that figure of merit (ZT) at 957 K of Ti-doped CCO was improved 30% than that of undoped CCO whereas 1 at% Sr doping brought about a 150% increase in ZT as compared to undoped CCO. The significant increase in electronic conductivity and the Seebeck coefficient are attributed to the enhanced carrier concentration and spin-entropy of Co4+ originating from the Sr doping effects in [Ca2CoO3] sublayer, which are evidenced by the scanning electron microscope (SEM), Raman, Hall, and X-ray photoelectron spectroscopy (XPS) analysis. Furthermore, the reduced thermal conductivity is attributed to the improved phonon scattering from heavier Sr doped Ca site in [Ca2CoO3] sublayer. Our findings demonstrate that doping at Ca sites of [Ca2CoO3] layer is a feasible pathway to boost TE performance of CCO material through promoting the electronic conductivity and the Seebeck coefficient, and reducing the thermal conductivity simultaneously. This work provides a deep understanding of the current limited ZT enhancement on CCO material and provides an approach to enhance the TE performance of other layered structure materials.

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“…Although metal oxides typically provide a low ZT owing to both low electrical conductivity and high lattice thermal conductivity issues, they are still considered potential candidates. There are many thermoelectric oxides under development, including NiO [19], Na x CoO 2 [20], Ca 3 Co 4 O 9 [21], ZnO [22], and LaNiO 3 /SrTiO 3 superlattices [23]. To achieve a higher ZT, metal oxides need to be highly electrically conductive.…”

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confidence: 99%

Thermoelectric properties of Zn- and Ce-alloyed In₂O₃ and the effect of SiO₂ nanoparticle additives

et al. 2022

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Thermoelectric materials are considered promising candidates for thermal energy conversion. This study presents the fabrication of Zn– and Ce–alloyed In2O3 with a porous structure. The electrical conductivity was improved by the alloying effect and an ultra–low thermal conductivity was observed owing to the porous structure, which concomitantly provide a distinct enhancement of ZT. However, SiO2 nanoparticle additives react with the matrix to form a third-phase impurity, which weakens the electrical conductivity and increases the thermal conductivity. A thermoelectric module was constructed for the purpose of thermal heat energy conversion. Our experimental results proved that both an enhancement in electrical conductivity and a suppression in thermal conductivity could be achieved through nano–engineering. This approach presents a feasible route to synthesize porous thermoelectric oxides, and provides insight into the effect of additives; moreover, this approach is a cost-effective method for the fabrication of thermoelectric oxides without traditional hot-pressing and spark–plasma–sintering processes.

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Exploring thermoelectric performance of Ca3Co4O9+δ ceramics via chemical electroless plating with Cu

Cited by 12 publications

References 39 publications

MOF-derived nanocarbon materials loaded with bimetallic sulfides as cathode catalysts for zinc–air batteries

MOF-derived nanocarbon materials loaded with bimetallic sulfides as cathode catalysts for zinc–air batteries

Thermoelectric performance enhancement by manipulation of Sr/Ti doping in two sublayers of Ca3Co4O9

Thermoelectric properties of Zn- and Ce-alloyed In₂O₃ and the effect of SiO₂ nanoparticle additives

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Exploring thermoelectric performance of Ca3Co4O9+δ ceramics via chemical electroless plating with Cu

Cited by 12 publications

References 39 publications

MOF-derived nanocarbon materials loaded with bimetallic sulfides as cathode catalysts for zinc–air batteries

MOF-derived nanocarbon materials loaded with bimetallic sulfides as cathode catalysts for zinc–air batteries

Thermoelectric performance enhancement by manipulation of Sr/Ti doping in two sublayers of Ca3Co4O9

Thermoelectric properties of Zn- and Ce-alloyed In2O3 and the effect of SiO2 nanoparticle additives

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Thermoelectric properties of Zn- and Ce-alloyed In₂O₃ and the effect of SiO₂ nanoparticle additives