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압전 특성의 보호층을 통한 리튬 금속 전지의 전기화학적 특성 개선
The Enhanced Electrochemical Performance of Lithium Metal Batteries through the Piezoelectric Protective Layer 원문보기

멤브레인 = Membrane Journal, v.33 no.1, 2023년, pp.13 - 22  

손희상 (광운대학교 화학공학과) ,  박대웅 (광운대학교 화학공학과) ,  신원호 (광운대학교 전자재료공학과)

초록
AI-Helper 아이콘AI-Helper

리튬 금속 기반 전극의 높은 용량에도 불구하고, 제어가 어려운 덴드라이트 성장은 낮은 쿨롱 효율, 안전 문제를 야기해, 리튬금속 배터리의 상용화를 제한한다. 본 연구에서는 압전 복합체인 BaTiO3/PVDF (BTO@PVDF) 기반 보호층을 리튬금속에 코팅, 덴드라이트에 의한 부피팽창으로 발생한 변형을 분극을 이용하여, 리튬 금속 전극의 안정성 및 성능을 향상하고자 한다. 이를 통해, 균일한 리튬이온의 증착이 가능해졌으며, BTO@PVDF 전극은 100 사이클 동안 약 98.1% 이상의 쿨롱 효율을 나타내었다. 또한, CV를 통해 향상된 리튬이온의 확산계수(DLi+) 증가를 보였으며, 본 연구에서 제시된 전략은 리튬 금속 전극의 성능 향상에 새로운 길을 나타내준다.

Abstract ▼ AI-Helper 아이콘AI-Helper

Despite high capacity of lithium metal anode, its uncontrollable dendrite growth results in the poor electrochemical (EC) performance (low Coulomb efficiency and limited cycle stability) and unsafe operation. In this study, we demonstrated a lithium metal anode protected with BaTiO3/PVDF based piezo...

주제어

# ${\beta}$-phase PVDF   #BaTi $O_3$   #piezoelectric effect   #lithium metal   #anode  

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