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29권 11호 1033-1039 2021 [한국자동차공학회 논문집 ]

제목 이차 전지용 Strip Tape의 제조와 Tab에 대한 접착 강도 및 전해질 용액에서의 안전성에 관한 연구
분야 자동차시험평가 및 기술교육
언어 Korean
저자 김덕호(경북보건대학교), 이영훈(한서대학교), 김영일(아주자동차대학), 구영진(한국교통안전공단 )
Key Words Strip tape(스트립 테이프), Tab tape(탭 테이프), Graft(그라프트), Polyolefin(폴리올레핀), Maleic anhydride(무수말레익산), Secondary cell(이차전지)
초록 The metal-bonding, functional polyolefin resin films, which are grafted with Maleic Anhydride, were bonded on both sides of the PEN film or PET film, and were used as strip tapes for a secondary cell. The resin-bonded, functional polyolefin films consist of 6 types: the olefin that grafts block PP with MAH, the olefin that grafts random PP with MAH, the olefin that grafts block PP and random PP with MAH, the olefin that compounds block PP and random PP with styrene and then grafted with MAH, the olefin that grafts LLDPE with MAH, and the olefin that compounds LLDPE with styrene and then grafted with MAH. Among the strip tapes that are made in three layers, the strip tape(0.020 mm thick), which bonded on both sides of PET with the olefin that compounded LLDPE with styrene and then grafted with MAH, showed the highest tensile bond strength. The tensile bond strength of the tape was 6.11 Mpa/cm2, which was about 2.5 times of the adhesive strength of a metal than the tensile bond strength of the existing commercialized strip tape(2.45 Mpa/cm2). The melting point of this olefin was 122.30 oC with an acid value of 0.88 and a graft rate of 0.077. In the case of most commercialized strip tapes, when the inner stable layer is applied with PET, it showed greater adhesive strength than PEN’s. The cell applied with this type of strip tape presented no leaking fluid of electrolyte solution and change in the image of the anufactured film on the bonded part until more than 150 days at room temperature and with a Li ion electrolyte solution at 65 oC, which usually happens in the case of commercialized strip tapes.
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