(A) study on high performance lithium ion capacitos with functionalized graphene = 기능화 그래핀을 이용한 고성능 리튬 이온 커패시터에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 350
  • Download : 0
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
Advisors
Choi, Jang-Wookresearcher최장욱
Description
한국과학기술원 : EEWS대학원,
Publisher
한국과학기술원
Issue Date
2013
Identifier
586430/325007  / 020114458
Language
eng
Description

학위논문(석사) - 한국과학기술원 : EEWS대학원, 2013.2, [ iv, 28 p. ]

Keywords

Lithium ion capacitors; 작용기; 전기화학 커패시터; 아미드 기; 우레아 환원; 그래핀; Graphene; Urea Reduction; Functional Group; Electrochemical Capacitor; 리튬 이온 커패시터

URI
http://hdl.handle.net/10203/198075
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=586430&flag=dissertation
Appears in Collection
EEW-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0