Electrode interface optimization advances conversion efficiency and stability of thermoelectric devices

• DOI: 10.1038/s41467-020-16508-x
• Publication Date: 2020-06-01T10:03:14Z
• Authors: Jing Chu; Jian Huang; Ruiheng Liu; Jincheng Liao; Xugui Xia; Qihao Zhang; Chao Wang; Ming Gu; Shengqiang Bai; Xun Shi; Lidong Chen
• Keywords: Skutterudite; Barrier layer; Thermoelectric generator

Abstract Although the CoSb 3 -based skutterudite thermoelectric devices have been highly expected for wide uses such as waste heat recovery and space power supply, limited long-term service stability majorly determined by degradation of electrode interface obstructs its applications. Here, we built up an effective criterion screening barrier layer based on combination negative interfacial reaction energy high activation Sb migration through formed layer. Accordingly, predicted niobium a promising The experimental results show skutterudite/Nb joint has slowest growth rate smallest electrical resistivity. fabricated 8-pair module using Nb achieves recorded conversion efficiency 10.2% at hot-side temperature 872 K shows excellent during long-time aging. This simple provides guidance with bonding-blocking-conducting synergetic functions device integration.