Enhanced thermoelectric performance in TiNiSn-based half-Heuslers

TL;DR

This paper reports high thermoelectric efficiency in TiNiSn-based half-Heusler alloys, achieved through excess nickel that reduces lattice thermal conductivity, promising for energy conversion applications.

Contribution

It demonstrates enhanced thermoelectric performance in TiNiSn-based materials by introducing excess nickel to lower thermal conductivity.

Findings

ZT > 0.5 achieved in arc-melted ingots

Excess nickel reduces lattice thermal conductivity

Improved thermoelectric efficiency in TiNiSn-based alloys

Abstract

Thermoelectric figures of merit, ZT > 0.5, have been obtained in arc-melted TiNiSn-based ingots. This promising conversion efficiency is due to a low lattice thermal conductivity, which is attributed to excess nickel in the half-Heusler structure.