DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Choi, Jang-Wook | - |
dc.contributor.advisor | 최장욱 | - |
dc.contributor.author | Lee, Ji-Hoon | - |
dc.contributor.author | 이지훈 | - |
dc.date.accessioned | 2015-04-29 | - |
dc.date.available | 2015-04-29 | - |
dc.date.issued | 2013 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=586430&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/198075 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : EEWS대학원, 2013.2, [ iv, 28 p. ] | - |
dc.description.abstract | Lithium ion capacitors (LICs) have recently drawn considerable attention because they utilize the ad-vantages of supercapacitors (high power) and lithium ion batteries (high energy). However, the energy densi-ties of conventional LICs, which consist of a pair of graphite and activated carbon electrodes, are limited by the small capacities of the activated carbon cathodes. To overcome this limitation, we have engaged urea-reduced graphene oxide. The amide functional groups generated during the urea reduction facilitate the enoli-zation processes for reversible Li binding, which improves the specific capacity by 37 % compared to those of conventional systems such as activated carbon and hydrazine-reduced graphene oxide. Utilizing the increased Li binding capability, when evaluated based on the mass of the active materials on both sides, the LICs based on urea-reduced graphene oxide deliver a specific energy density of ~106 $Wh/kg_{total}$ and a specific power den-sity of~4200 $W/kg_{total}$ with perfect capacity retention up to 1000 cylces. These values are far superior to those of previously reported LICs and supercapacitors, which suggests that appropriately treated graphene can be a promising electrode material for LICs | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Lithium ion capacitors | - |
dc.subject | 작용기 | - |
dc.subject | 전기화학 커패시터 | - |
dc.subject | 아미드 기 | - |
dc.subject | 우레아 환원 | - |
dc.subject | 그래핀 | - |
dc.subject | Graphene | - |
dc.subject | Urea Reduction | - |
dc.subject | Functional Group | - |
dc.subject | Electrochemical Capacitor | - |
dc.subject | 리튬 이온 커패시터 | - |
dc.title | (A) study on high performance lithium ion capacitos with functionalized graphene | - |
dc.title.alternative | 기능화 그래핀을 이용한 고성능 리튬 이온 커패시터에 관한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 586430/325007 | - |
dc.description.department | 한국과학기술원 : EEWS대학원, | - |
dc.identifier.uid | 020114458 | - |
dc.contributor.localauthor | Choi, Jang-Wook | - |
dc.contributor.localauthor | 최장욱 | - |
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