[논문]다양한 형태의 AAO membrane 제조 및 리튬이온 전지의 분리막 응용 연구

김문수; 임경민; 하재윤; 김용태; 최진섭

doi:10.5695/jkise.2021.54.5.213

다양한 형태의 AAO membrane 제조 및 리튬이온 전지의 분리막 응용 연구
Study on the Fabrication of Various AAO Membranes for the Application of Li-ion Battery Separator 원문보기

한국표면공학회지 = Journal of the Korean institute of surface engineering, v.54 no.5, 2021년, pp.213 - 221

김문수 (인하대학교 화학공학과) , 임경민 (인하대학교 화학공학과) , 하재윤 (인하대학교 화학공학과) , 김용태 (인하대학교 화학공학과) , 최진섭 (인하대학교 화학공학과)

Abstract ▼ AI-Helper

In order to improve the energy density and safety of Li-ion batteries, the development of a separator with high thermal stability and electrolyte wettability is an important desire. Thus, the ceramic separator to replace the polymer type is one of the most promising materials that can prevent short-circuit caused by the formation of dendrite and thermal deformation. In this study, we introduce the fabrication of various anodic aluminum oxide membranes for the application of Li-ion battery separators with the advantages of improved mechanical/thermal stability, wettability, and a high rate of Li+ migration through the membrane. Two different types of through-holes and branched anodic aluminum oxide membranes are well used in lithium-ion battery separators, however, branched anodic aluminum oxide membranes exhibit the most improved performance with capacity (126.0 mAh g-1 @ 0.3C), capacity drop at the high C-rate (30.6 %), and low internal resistance (8.2 Ω).

주제어

표/그림 (6)

그림 Fig. 1. (a) Time-current density plot during Al anodization. (b–d) Top, cross-sectional, and bottom-view SEM images of pristine anodic porous alumina (AAO).
그림 Fig. 2. Bottom images of AAO as a function of etch time for through-hole type AAO formation: (a) 15, (b) 30, (c) 45, and (d) 60 min.
그림 Fig. 3. (a) Photograph of as-prepared through-hole AAO membrane. SEM images of through-hole AAO membrane: (b) top, (c) cross-sectional, and (d) bottom-view.
그림 Fig. 4. (a) Time-current density plot during modulation process of AAO. (b–d) Top, cross-sectional, and bottom-view SEM images of branched-AAO.
그림 Fig. 5. (a) Rate capability of PP, AAO, and branched AAO separator at different current densities. (b) Nyquist plots of PP, AAO, and branched AAO separator investigated by electrochemical impedance spectroscopy (EIS).
표 Table. 1. Summary of Li-ion half-cell test derived from the results of rate capability and EIS.

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