|
|
| Type |
Poster Presentation |
| Area |
재료화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
MAT.P-354 |
| Subject |
Synthesis and Thermoelectric Properties of Cu2-xSe and CuAgSe
|
| Authors |
JINYINGSHI, 한미경1, 김성진2,*
이화여자대학교 화학나노과학과, Korea
1이화여자대학교 화학나노과학부, Korea
2이화여자대학교 화학과, Korea
|
| Abstract |
The thermoelectric (TE) energy conversion technology has received much attention in the past decades. It has a potential impact on efficient world–wide energy harvesting. The theoretical maximum conversion efficiency is defined by η = √(1+ZT), where ZT is the dimensionless parameter known as the figure of merit: ZT = S2σT/κ. An ideal TE material should have a high power factor (S2s) as well as low thermal conductivity (κ). However, because of the interrelation between transport parameters, it is very challenging to achieve high ZT values. Recently, superionic conductors with the concept of the “phonon-liquid electron-crystal (PLEC)” has been used to abnormal but attractive. The binary Cu2-xSe and ternary CuAgSe are kind of superionic conductor that agrees well with PLEC concept. In this study, we tried to synthesize uniform sized surfactant-free Cu2-xSe nanoplates and nanowires and CuAgSe nanoparticles. We found that the size and morphology can be controlled by changing the reaction time and solution concentration. We consolidated Cu2-xSe and CuAgSe nanoparticle to bulk pellet via a simple route, spark plasma sintering (SPS). As a consequence, ZT value of Cu2-xSe continuously increase, but CuAgSe shows high ZT value at low temperature. The maximum ZT value for Cu2-xSe is 0.27 at 723 K, whereas, CuAgSe is 0.59 at 323K. |
| E-mail |
allkdy77@gmail.com |
|
119th General Meeting of the KCS