Record high thermoelectric performance in bulk SrTiO3 via nano-scale modulation doping

Wang, Jun; Zhang, Bo Yu; Kang, Hang Won; Li, Yan; Yaer, Xinba; Li, Jing‐Feng; Tan, Qing; Zhang, Shuai; Fan, Guo Hua; Liu, Chengyan; Liu, Miao; Ding, Nan; Wang, Tong Min; Zhao, Li‐Dong

doi:10.1016/j.nanoen.2017.04.003

Cited by 175 publications

(124 citation statements)

References 40 publications

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“…However, the commonly utilized noble metal cathode electrocatalysts (e.g., Pt, Ir, and Ru) with high price and scarcity largely suppress the economic benefit of metal–air batteries . On the other hand, metal–air batteries as rechargeable electronic devices require the air cathodes to efficiently catalyze not only the discharging process (corresponding to oxygen reduction reaction, ORR) but also the charging process (corresponding to oxygen evolution reaction, OER) . Disappointingly, single precious metals generally fail to meet this requirement since they are incapable to serve as bifunctional electrocatalysts that can simultaneously provide sufficient activity for both ORR and OER .…”

Section: Introductionmentioning

confidence: 99%

Atomic Modulation of FeCo–Nitrogen–Carbon Bifunctional Oxygen Electrodes for Rechargeable and Flexible All‐Solid‐State Zinc–Air Battery

Cheng

et al. 2017

Advanced Energy Materials

748

398

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Rational design and exploration of robust and low‐cost bifunctional oxygen reduction/evolution electrocatalysts are greatly desired for metal–air batteries. Herein, a novel high‐performance oxygen electrode catalyst is developed based on bimetal FeCo nanoparticles encapsulated in in situ grown nitrogen‐doped graphitic carbon nanotubes with bamboo‐like structure. The obtained catalyst exhibits a positive half‐wave potential of 0.92 V (vs the reversible hydrogen electrode, RHE) for oxygen reduction reaction, and a low operating potential of 1.73 V to achieve a 10 mA cm−2 current density for oxygen evolution reaction. The reversible oxygen electrode index is 0.81 V, surpassing that of most highly active bifunctional catalysts reported to date. By combining experimental and simulation studies, a strong synergetic coupling between FeCo alloy and N‐doped carbon nanotubes is proposed in producing a favorable local coordination environment and electronic structure, which affords the pyridinic N‐rich catalyst surface promoting the reversible oxygen reactions. Impressively, the assembled zinc–air batteries using liquid electrolytes and the all‐solid‐state batteries with the synthesized bifunctional catalyst as the air electrode demonstrate superior charging–discharging performance, long lifetime, and high flexibility, holding great potential in practical implementation of new‐generation powerful rechargeable batteries with portable or even wearable characteristic.

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Section: Introductionmentioning

confidence: 99%

Atomic Modulation of FeCo–Nitrogen–Carbon Bifunctional Oxygen Electrodes for Rechargeable and Flexible All‐Solid‐State Zinc–Air Battery

Cheng

et al. 2017

Advanced Energy Materials

748

398

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“…10,11 Titanate-based thermoelectrics, such as donor doped SrTiO 3 , are the current state-of-the-art n-type thermoelectric oxides with a recent report of ZT z 0.6 at 1000 K which was achieved through nanoscale modulation of SrTiO 3 and TiO 2 inclusions in Sr 0.9 La 0.1 Ti 0.9 Nb 0.1 O 3 . 12 The unique band structure of SrTiO 3 with contributions from both heavy and light carriers at the Fermi level, 13 gives rise to high power factors of 28-36 mW K À2 cm À1 at 300 K for x ¼ 0.015-0.1 in Sr 1Àx La x -TiO 3Àd single crystals but ZT is limited to 0.09 due to the large k of 9-12 W m À1 K À1 in these materials. 14,15 With k latt contributing 75-100% of the total thermal conductivity, control over lattice phonon transport would allow for much higher gures of merit to be achieved in titanate perovskite thermoelectrics.…”

Section: Introductionmentioning

confidence: 99%

A and B site doping of a phonon-glass perovskite oxide thermoelectric

et al. 2018

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“…Best performing oxide‐based materials highlighting (A) highest σ, (B) low κ t and (C) ZT value via miscellaneous optimization techniques …”

Section: High Performance Inorganic Te Materialsmentioning

confidence: 99%

Inorganic thermoelectric materials: A review

et al. 2020

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Summary Thermoelectric generator, which converts heat into electrical energy, has great potential to power portable devices. Nevertheless, the efficiency of a thermoelectric generator suffers due to inefficient thermoelectric material performance. In the last two decades, the performance of inorganic thermoelectric materials has been significantly advanced through rigorous efforts and novel techniques. In this review, major issues and recent advancements that are associated with the efficiency of inorganic thermoelectric materials are encapsulated. In addition, miscellaneous optimization strategies, such as band engineering, energy filtering, modulation doping, and low dimensional materials to improve the performance of inorganic thermoelectric materials are reported. The methodological reviews and analyses showed that all these techniques have significantly enhanced the Seebeck coefficient, electrical conductivity, and reduced the thermal conductivity, consequently, improved ZT value to 2.42, 2.6, and 1.85 for near‐room, medium, and high temperature inorganic thermoelectric material, respectively. Moreover, this review also focuses on the performance of silicon nanowires and their common fabrication techniques, which have the potential for thermoelectric power generation. Finally, the key outcomes along with future directions from this review are discussed at the end of this article.

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Record high thermoelectric performance in bulk SrTiO3 via nano-scale modulation doping

Cited by 175 publications

References 40 publications

Atomic Modulation of FeCo–Nitrogen–Carbon Bifunctional Oxygen Electrodes for Rechargeable and Flexible All‐Solid‐State Zinc–Air Battery

Atomic Modulation of FeCo–Nitrogen–Carbon Bifunctional Oxygen Electrodes for Rechargeable and Flexible All‐Solid‐State Zinc–Air Battery

A and B site doping of a phonon-glass perovskite oxide thermoelectric

Inorganic thermoelectric materials: A review

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