Hyperbranched β-Cyclodextrin polymer as an effective multidimensional binder for silicon anodes in lithium rechargeable batteries = 다차원 하이퍼브렌치 베타-싸이클로덱스트린 고분자의 리튬이차전지 실리콘 음극 바인더 물질로서의 적용

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Polymeric binders play an important role in electrochemical performance of high capacity silicon (Si) anodes that usually suffer from severe capacity fading due to unparalleled volume change of Si during cy-cling. In an effort to find efficient polymeric binders that could mitigate such capacity fading, herein, we in-troduce polymerized β-cyclodextrin (β-CDp) binder for Si nanoparticle anodes. Unlike one-dimensional bind-ers, hyperbranched network structure of β-CDp presents multidimensional hydrogen bonding interactions with Si particles and therefore offers robust contacts between both components. Even the Si nanoparticles that lost the original contacts with the binder during cycling recover within the multidimensional binder network, thus creating a self-healing effect. Utilizing these advantageous features, β-CDp based Si electrode shows marked-ly improved cycling performance compared to those of other well-known binder cases, especially when com-bined with linear polymers at an appropriate ratio to form hybrid binders.
Advisors
Choi, Jang-Wookresearcher최장욱
Description
한국과학기술원 : EEWS대학원,
Publisher
한국과학기술원
Issue Date
2014
Identifier
568722/325007  / 020123636
Language
eng
Description

학위논문(석사) - 한국과학기술원 : EEWS대학원, 2014.2, [ iii, 41 p. ]

Keywords

Binder; 실리콘 음극; 리튬이온전지; 리튬이차전지; 수명특성; 싸이클로덱스트린; Cyclodextrin; Cycle life; Lithium ion battery; Silicon anode; 바인더

URI
http://hdl.handle.net/10203/198068
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=568722&flag=dissertation
Appears in Collection
EEW-Theses_Master(석사논문)
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