서지주요정보
리튬염을 포함하는 고분자 액체 전해질의 이온 전도도 및 이온 이동도에 관한 연구 = Study on the ionic conductivity and mobility of liquid polymer electrolytes containing lithium salts
서명 / 저자 리튬염을 포함하는 고분자 액체 전해질의 이온 전도도 및 이온 이동도에 관한 연구 = Study on the ionic conductivity and mobility of liquid polymer electrolytes containing lithium salts / 김동원.
저자명 김동원 ; Kim, Dong-Won
발행사항 [대전 : 한국과학기술원, 1992].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8003002

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 92008

SMS전송

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초록정보

Ionic conductivity behavior of the liquid polymer electrolytes formed by dissolving the lithium salts in poly(ethylene oxide) and poly(propylene oxide) was investigated. A high resolution NMR(Nuclear Magnetic Resonance) relaxation technique was used to study the dynamics of the ions in polymer electrolytes. The $^7$Li NMR results revealed the coexistence of two separate lineshape components with substantially different spin-spin relaxation times($T_2$) in liquid polymer electrolytes. From the resolution of the two components, we could estimate the spin-spin relaxation time associated with the mobility of free mobile lithium ions and also the fraction of free lithium ions contributing to the ionic conductivity. The temperature dependence of ionic conductivity in liquid polymer electrolyte followed Vogel-Tamman-Fulcher equation, which indicated the ionic mobility was dependent on the segmental motion of the polymer chain. From the $^7$Li relaxation data in PEO and PPO, it was found that there was an obvious difference between in their respective modes of the ion-polymer interaction and carrier migration. This difference probably arised from their structures and physical properties such as dipole moment or dielectric constant. The combination of the ionic conductivity and NMR data of the polymer electrolyte with the different molecular weights provided the evidence that the difference in conductivity was caused by the ionic migration process rather than the carrier generation process. And we could interpret the maximum conductivity phenomena observed in the plot of the ionic conductivity versus the salt concentration by using the $^7$Li relaxation parameters.

서지기타정보

서지기타정보
청구기호 {MCE 92008
형태사항 vii, 63 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Dong-Won Kim
지도교수의 한글표기 : 박정기
지도교수의 영문표기 : Jung-Ki Park
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 61-63
주제 Electrolytes --Conductivity.
고분자 전해질. --과학기술용어시소러스
이온 전도. --과학기술용어시소러스
Polyelectrolytes.
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