High entropy strategy on thermoelectric materials

Abstract

High-entropy materials, which consist of multiple elements occupying a single sublattice in a disordered manner, have emerged as innovative material systems with various promising applications. Many macroscopic physical properties, such as electrical transport and thermal transport, are closely related to the periodic distribution of atoms. In high-entropy compounds, the long-range periodic arrangement of atoms is broken down by the disordered distribution of various elements, which would lead to changes in physical properties. Therefore, the high-entropy idea will open new avenues for designing these functional materials with promising performance and high reliability. This perspective focuses on the high-entropy strategies of thermoelectric materials, discussing how high entropy will alter their properties. The possible routes of designing high-entropy high-performance thermoelectric materials are prospected, which can also provide enlightenment for the development of high-entropy systems in other research fields.

High-Entropy Engineering in Thermoelectric Materials: A Review

“…High-entropy alloys (HEAs) have recently gained popularity in the diverse fields of structural materials owing to their potential for remarkable mechanical properties compared to conventional alloys, such as a better strength-to-weight ratio, higher fracture resistance, higher tensile strength, and higher corrosion resistance [1,2]. In 2004, Yeh and Cantor introduced the idea of designing HEAs or multicomponent alloys (MCAs) using elements in equiatomic or near-equiatomic proportions to increase the entropy of mixing [3,4].…”

A comprehensive review of entropy engineered GeTe: an antidote to phase transformation

“…3(b)). [61][62][63][64][65][66][67][68] This perception enables the development of thermoelectric materials with enhanced performance along with long range ordering and simultaneously imposing disorder at short range, which decrease thermal transport and improve electrical transport.…”

Thermoelectric Transport Performance in p-Type AgSbTe2-Based Materials through Entropy Engineering

“…In this scenario, thermoelectric (TE) materials can realize the direct conversion of heat into electricity and play an important role in waste recovery; thus, TE materials have attracted a great deal of attention in the field of new energy technology. Nevertheless, the major obstacle to widespread applications is their inferior conversion efficiency known as dimensionless figure of merit, normalZT = S 2 σ T k , where S , σ, T , an κ are the Seebeck coefficient, electrical conductivity, absolute temperature, and thermal conductivity, respectively. , Over the past decades, high thermoelectric performance in materials has been attained by realizing the power factor (PF) ( S 2 σ) through band convergence, , resonant levels, energy filtering, , and intrinsically large inharmonicity . However, microstructure engineering, , all-scale hierarchical architectures, , liquidlike behavior, and rattling approach resulted in the scattering of phonons inclusively, and hence effective reduction in thermal transport was attained.…”