서지주요정보
S/FeS 복합양극의 조성비에 따른 리튬/황 2차전지의 성능 연구 = Study on performance of secondary lithium/sulfur battery with various weight ratios of S/FeS composite cathode
서명 / 저자 S/FeS 복합양극의 조성비에 따른 리튬/황 2차전지의 성능 연구 = Study on performance of secondary lithium/sulfur battery with various weight ratios of S/FeS composite cathode / 김광현.
저자명 김광현 ; Kim, Kwang-Hyon
발행사항 [대전 : 한국과학기술원, 2004].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8015116

소장위치/청구기호

학술문화관(문화관) 보존서고

MCBE 04003

SMS전송

도서상태

이용가능

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반납예정일

초록정보

The secondary Li/S polymer batteries (LSPB) consist of sulfur composite cathode, polymer electrolyte, and lithium anode. In this study, the composite cathode was made from elemental sulfur, iron(II) sulfide, carbon black, Kynar FLEX 2801(P(VdF-co-HFP)), lithium perchlorate ($LiClO_4$), and acetone. And the anode was made from lithium metal. As polymer electrolyte, we prepared polymer coated membrane (PCM) by coating Kynar 2801 on PE separator, and then immersed it in 1M $LiClO_4$ solution with tetra(ethylene glycol) dimethyl ether(TEGDME). The cathode based on sulfur was prepared with different ratios of sulfur and iron(II) sulfide for the Li/S batteries. The cathode with the ratio of S:FeS = 8:2 showed the highest specific capacity and good battery performance at room temperature. To understand the effect of the iron on the electrochemical performance, the cells were characterized using FRA, CV, charging and discharging. And we prepared composite polymer electrolytes consisting of PCM, TEGDME, $LiClO_4$ and studied on their electrochemical properties. A maximum ionic conductivity was found for the sample containing 50wt% salt to Kynar FLEX 2801 and they were $2.69×10^{-4}S/cm$ at room temperature. Increases of salt content in each polymer electrolytes seem to be main reasons for the initial increase of the ionic conductivities. The initial capacities of the cells were increased with the salt content. But they were decreased sharply at second discharging. As increase salt concentration, crystalline region of the polymer electrolyte was broken. To the contrast, at the high salt concentration viscosity increased and the relative fraction of the free ions in the polymer electrolyte reduced.

서지기타정보

서지기타정보
청구기호 {MCBE 04003
형태사항 vi, 54 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kwang-Hyon Kim
지도교수의 한글표기 : 정인재
지도교수의 영문표기 : In-Jae Chung
학위논문 학위논문(석사) - 한국과학기술원 : 생명화학공학과,
서지주기 참고문헌 : p. 51-54
주제 리튬/황 2차전지
LITHIUM/SULFUR BATTERY
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