Polyrotaxane molecular machine binder for silicon microparticle anodes in lithium ion batteries = 폴리로텍세인 분자기계를 리튬이온전지 실리콘 마이크로입자 음극 바인더로 적용한 연구

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Lithium-ion batteries with ever-increasing energy densities are needed for batteries for ad-vanced devices and all-electric vehicles. Silicon has been highlighted as a promising anode material because of its superior specific capacity. During repeated charge-discharge cycles, silicon undergoes huge volume changes. This limits cycle life via particle pulverization and an unstable electrode-electrolyte interface, especially when the particle sizes are in the micrometer range. I show that the incorporation of 5 weight % Polyrotaxane to conventional poly acrylic acid binder imparts extraor-dinary elasticity to the polymer network originating from the ring sliding motion of Polyrotaxane. This binder combination keeps even pulverized silicon particle coalesced without disintegration, enabling stable cycle life for silicon microparticle anodes at commercial-level areal capacities.
Advisors
Chung, Sung-Yoonresearcher정성윤researcher
Description
한국과학기술원 :EEWS대학원,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : EEWS대학원, 2018.2,[v, 41 p. :]

Keywords

Lithium-ion battery▼aSilicon anode▼aMicroparticle▼aMolecular Machine▼aPolyrotaxane▼aElasticity; 리튬이온전지▼a실리콘 음극▼a마이크로 입자▼a분자 기계▼a폴리로텍세인▼a탄성

URI
http://hdl.handle.net/10203/264289
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=734217&flag=dissertation
Appears in Collection
EEW-Theses_Ph.D.(박사논문)
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