Effect of the inorganic filler on the electrochemical properties of the polymer electrolytes = 고분자 전해질의 전기화학적 특성에 미치는 무기물의 영향

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The goal of the research in this thesis is to extend the understanding of the physics involved in the electrochemical characteristics of the polymer electrolytes including silica and to develop the novel composite polymer electrolytes(CPE) applicable to lithium polymer batteries (LPB). The important challenge in lithium battery technology are the replacement of the carbonaceous anode by a lithium metal anode and of the liquid electrolyte by a polymer one, i.e., going from a liquid lithium-ion battery to a solid “lithium polymer battery” (LPB). These developments are in turn expected to result in a further improvement of energy density and to enable a plastic configuration for enhanced versatility in battery design and reduced manufacturing costs. These traits are particularly appealing for electric vehicle applications, whence the intensive LPB studies currently underway at various industrial and academic laboratories. The main requisite for success in LPB development is the optimization and control of the electrode/polymer electrolyte interface. This is indeed the requirement which poses the main problems, especially as regards the reactivity of the lithium metal to the polymer electrolyte, which can lead to uncontrolled passivation phenomena with the formation of surface layers. Thick, passivation-induced layers cause uneven lithium deposition in the charge process, thereby resulting in dendritic growth and eventual cell short-circuiting. Of paramount importance is to control the growth of passivation layers so as to attain protection against further lithium corrosion and to assure an efficient lithium deposition-stripping process. It is now well established that the type and growth of the lithium passivation layer is unpredictably influenced by the presence of liquid components and/or impurities in the electrolytes. The liquid phase decomposes at the surface of lithium, thereby severely affecting the cyclability of the lithium electrode. One obvious approa...
Advisors
Park, Jung-Kiresearcher박정기researcher
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2002
Identifier
177296/325007 / 000955261
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2002.8, [ xiii, 179 p. ]

Keywords

Fumed Silica; Polymer electrolyte; Interfacial Stability; 계면안정성; 실리카; 고분자 전해질

URI
http://hdl.handle.net/10203/28897
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=177296&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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