초록

본 과제에서는 열전 소자 제작에 있어서 저가 및 신뢰성있는 전기화학 및 갈바니치환방법으로 다양한 형태의 나노구조 열전소재를 합성이 가능하며 나노구조가 삽입된 열전소재를 합성하였음.
주요 연구내용 및 수행실적은 다음과 같음.
○ 갈바니치환 방법을 통한 열전 나노소재 합성
○ 하이브리드 나노 열전소재 합성
○ 나노소재 측정 플랫폼 개발 (UCR)
○ 전기방사 방식을 통한 열전 나노재료 합성(한양대)
○ 나노구조체 기반 열전 모듈 제조
○ 열전도도 측정 장비 셋업

Abstract ▼

Thermoelectric (TE) energy converters are solid-state devices that can generate electricity by harvesting waste thermal energy, thereby improving the efficiency of a system. The many advantages of TE devices include solid-state operation, zero-emissions, vast scalability, no maintenance and a long o

Thermoelectric (TE) energy converters are solid-state devices that can generate electricity by harvesting waste thermal energy, thereby improving the efficiency of a system. The many advantages of TE devices include solid-state operation, zero-emissions, vast scalability, no maintenance and a long operating lifetime. Nonetheless, due to their limited energy conversion efficiencies, thermoelectrics currently have a rather limited set of applications. Recent research in low-dimensional thermoelectric nanostructures has invigorated the field by identifying classical and quantum mechanical size effects on electrons and phonons, which provide additional mechanisms to enhance energy conversion efficiencies. Several experiments on painstakingly grown two-dimensional (2D) nanostructures showed the thermoelectric figure of merit (ZT) of ~2-3, shattering previous limits of ~ 1. Even more exciting are the theoretical predictions for nanowires, which are thought to have ZT exceeding 5.
The goal of the proposed research work is to develop a novel cost-effective electrochemical and chemical processes for the facile synthesis of high-quality thermoelectric nanostructures (i.e. ultra-long hollow nanofibers), to demonstrate improved energy conversion efficiencies, and to fabricate thermoelectric nanodevices.