journal article·2021-05-24

Minimizing Thermal Conductivity for Boosting Thermoelectric Properties of Cu–Ni-Based Alloys through All-Scale Hierarchical Architectures

Kai Guo, Jiarong Zhang, Yuting Zhang, Lu Liu, Song Yuan, Ying Jiang, Jun Luo, Jing-Tai Zhao

ACS Applied Energy Materials· Volume 4· Issue 5
Publisher page

Abstract

Constantan (Cu–Ni alloy) is widely used in the field of thermocouples due to its excellent thermoelectric and mechanical properties. To broaden the application area, the intrinsically high thermal conductivity is intentionally suppressed with the aim to increase the thermoelectric figure-of-merit (ZT) and eventually the energy conversion efficiency. All-scale hierarchical architectures including the point defect, second phase, nanocomposite, and micropore are realized in Cu–Ni-based alloys, leading to the significant reduction in thermal conductivity from 18.14 to 3.23 W m–1 K–1 at 773 K. Therefore, the thermoelectric properties have been improved with the ZT being up to 0.23 at 773 K. The present work demonstrates a promising and general strategy to enhance the thermoelectric performance of materials with ultrahigh electrical and thermal conductivity.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Radiation and Cooling Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China

Materials Genome Institute, Shanghai University, 99 Shangda Road, Shanghai 200444, China

School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China

Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China

Funding

National Natural Science Foundation of China · Programme of Introducting Talents of Discipline to Universities · National Key Research and Development Program of China

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