Stabilizing Zinc-powder Based Composite Anode for Aqueous Zinc Metal Batteries

Abstract

아연 분말 기반 음극 소재의 도입을 통한 비발화, 유효 전류 밀도 감소, 높은 가공 특성의 차세대 전지를 구현할 수 있으나, 전극 제조법 및 소재에서의 최적화 연구가 전무하다. 본 연구에서는 다양한 도전재와 바인더를 도입하여 수계 아연 전지용 아연 분말 기반의 복합 음극 안정화 및 최적 효율과 구조적 안정성을 가진 아연 분말 기반 음극 제조법을 확립하였다. Aqueous zinc (Zn) ion batteries (AZIB) has various advantages compared to other metal-based batteries such as high gravimetric capacity, low reduction potential, and intrinsic safety. Furthermore, Zn powder shows more flexible processing technology and lower current density due to its large surface area. However, because Zn powder has problems with uncontrolled dendrite growth, corrosion, and hydrogen evolution reaction (HER), indicating that improvements of the performance and the stability are still limited. To solve the problem, this study searches the best method for stabilizing aqueous Zn powder battery anode by adjusting conductive agents and binders, which have appropriate hydrophilicity and hydrophobicity to maintain the stability of electrode. Therefore, the possibility of Zn powder composite electrode as anode was confirmed for the next-generation energy storage systems (ESSs) batteries.