서지주요정보
Study on the electrochemical characteristics of plasticized network polymer electrolyte based on poly(ethylene oxide) = 가교된 폴리에틸렌옥사이드를 사용한 가소화된 고분자 전해질의 전기화학적 특성에 관한 연구
서명 / 저자 Study on the electrochemical characteristics of plasticized network polymer electrolyte based on poly(ethylene oxide) = 가교된 폴리에틸렌옥사이드를 사용한 가소화된 고분자 전해질의 전기화학적 특성에 관한 연구 / Ha-Kyu Seo.
저자명 Seo, Ha-Kyu ; 서하규
발행사항 [대전 : 한국과학기술원, 1999].
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소장정보

등록번호

8009425

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 99018

SMS전송

도서상태

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초록정보

The present work is concerned with the electrochemical chacteristics of plasticized network polymer electrolyte based on poly(ethylene oxide)(PEO). The polymer was synthesized by condensation polymerization of poly(ethylene glycol)(PEG, $M_n$=1000) and 3-chloro-2-chloromethyl-1-propene(CCMP), followed by cross-linking reaction. And plasticized polymer electrolytes were prepared by adding the plasticizers. These studies are classified in three categories concerned with one another. First the ionic conductivity with the contents of ethylene carbonate(EC) in network PEO(NPC) was investigated. The ionic conductivity was saturated with the increase of EC contents. The ionic conduction is affected by the mobility and the number of carrier ions. As a qualitatively measure of the mobility of polymer electrolyte, DSC experiments were conducted, and then infrared(IR) spectroscopy was measured to quantify the number of charge carriers. As a results, it was found that the ionic conductivity was dependent strongly on the mobility of polymer electrolyte rather than the number of charge carriers. Also the ionic conductivity at room temperature showed very high value $(10^{-3} S/cm)$ even in the small EC contents(100wt%) in comparison with other system such as PMMA. That result was because of the different viscosity in polymer electrolyte resulted from the intrinsically chain mobility of polymers. Second, the interfacial resistances were studied under storage time and the electrical stress respectively using Li/Li symmetric cell. Plasticized polymer electrolytes formed much more stable interface in two conditions. These phenomena were explained with the variation of contact area and properties of interphase. Third, electrochemical stability could be guaranteed by obtaining linear sweep voltammogram. And charge-discharge properties of this system were investigated using charge-discharge instrument. Plasticized polymer electrolyte showed even higher peak current than solvent-free polymer electrolyte. It was found that these facts resulted from the better bulk conductivity, more stable interfacial resistance and better contact with Li electrode.

서지기타정보

서지기타정보
청구기호 {MCHE 99018
형태사항 vi, 53 p. : 삽도 ; 26 cm
언어 영어
일반주기 저자명의 한글표기 : 서하규
지도교수의 영문표기 : Jung-Ki Park
지도교수의 한글표기 : 박정기
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 Includes references
주제 Poly(ethylene oxide)
Plasticized polymer electrolyte
EC
Interfacial resistance
Cyclic voltammetry
폴리에틸렌옥사이드
가소화된고분자전해질
에틸렌카보네이트
계면저항
충방전 싸이클
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