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Enhanced Figure-of-Merit in Hierarchical Tubular Porous Cuprous Selenide

18 Pages Posted: 20 Jun 2019 First Look: Accepted

See all articles by Jixing Liu

Jixing Liu

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

Meng Li

Zhejiang University - School of Materials Science and Engineering

Shenghui Yang

Xi'an University of Technology - School of Materials Science and Engineering

Shengnan Zhang

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

Jianqing Feng

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

Chengshan Li

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

Pingxiang Zhang

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

Lian Zhou

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

Abstract

A melting congruent superionic thermoelectric material, Cu2Se, with isotropic tubular porous structure was successfully fabricated through a typical gas eutectic transformation process. Elongated pores scoping from nanometric to micrometric were found homogeneously dispersed in the Cu2Se matrix with different orientations, inside which a corrugated surface was observed and characterized. The as-fabricated samples behave slight fluctuation on Seebeck coefficient and electrical conductivity, while conspicuously reduced thermal conductivity, achieving an enhanced thermoelectric figure-of-merit, zT up to 2.1 at 873 K. Unlike other traditional porous materials, this structured Cu2Se also presented anomalous intensification on mechanical properties, leading to a promising marketing application.

Keywords: thermoelectric materials, Cu2Se, structure engineering

Suggested Citation

Liu, Jixing and Li, Meng and Yang, Shenghui and Zhang, Shengnan and Feng, Jianqing and Li, Chengshan and Zhang, Pingxiang and Zhou, Lian, Enhanced Figure-of-Merit in Hierarchical Tubular Porous Cuprous Selenide (June 20, 2019). Available at SSRN: https://ssrn.com/abstract=3406959

Jixing Liu

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

China

Meng Li (Contact Author)

Zhejiang University - School of Materials Science and Engineering ( email )

38 Zheda Road
Hangzhou, Zhejiang 310058
China

Shenghui Yang

Xi'an University of Technology - School of Materials Science and Engineering

China

Shengnan Zhang

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

China

Jianqing Feng

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

China

Chengshan Li

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

China

Pingxiang Zhang

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

China

Lian Zhou

Northwest Institute for Nonferrous Metal Research - Superconducting Materials Research Center

China

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