In this study, a non-migration 3-layer PE-based sealing film was developed to prevent performance degradation and electrostatic metal impurity adsorption in secondary battery cathode materials. To overcome the limitations of conventional Japanese CPP films, a 3-layer co-extrusion structure was designed. The Skin-1 layer with MAH-g-PE achieved a peel strength of 8.5 N/25mm with the aluminum barrier layer. The Core layer employed low-MI PE, providing high stability with a tensile strength of 22.8 MPa and the Vicat softening point of 132℃. The Skin-2 layer, contacting the cathode material, incorporated metallocene PE to achieve low-temperature sealability(sealing strength of 40.5 N/25mm) and a low friction coefficient(0.88) without slip agents. Surface-modified CNTs were chemically anchored to control surface resistivity at 5.73×1012Ω/sq and reduce metallic impurity adsorption by up to 55.6%. High property retention over 95% after 500-hour environmental tests demonstrated long-term reliability, contributing to supply chain stabilization.
목차
Abstract 1. 서론 2. Non-Migration 고분자 소재 및최소화 배합 설계 2.1 저이행성(Non-Migration) 구조 및 수지 조성전략 2.2 층별 기능 분담 구조에 따른 소재 구성 2.3 저분자 첨가제 최소화 및 대체 기술 2.4 Non-Migration 설계 및 소재 배합 비교 3. 정전기 방지용 탄소나노 소재 분산기술개발 3.1 정전기 발생과 금속 이물 흡착 문제 분석 3.2 탄소나노(CNT) 소재 적용 3.3 CNT 분산성 확보를 위한 표면개질 3.4 3-Layer 층별 구조 설계 및 기능 분리 4. 시험평가 및 신뢰성 검증 4.1 실링 필름의 목표 성능평가 4.2 층별 기능 검증 및 종합분석 5. 결론 References