Tungsten nitride incorporated graphene fibers for wearable supercapacitors웨어러블 슈퍼캐패시터의 응용으로써 질화 텅스텐이 복합된 그래핀 섬유에 대한 연구

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dc.contributor.advisorKim, Sang Ouk-
dc.contributor.advisor김상욱-
dc.contributor.authorHassan, Syed Ali Salman-
dc.date.accessioned2021-05-12T19:34:33Z-
dc.date.available2021-05-12T19:34:33Z-
dc.date.issued2020-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=909982&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/283889-
dc.description학위논문(석사) - 한국과학기술원 : 신소재공학과, 2020.2,[v, 54 p. :]-
dc.description.abstractGraphene-based fibers attract much scientific interest as electrode materials for wearable energy storage devices such as supercapacitors owing the high conductivity of graphene and the mechanical flexibility associated with the fiber shape. However, due to restacking of graphene sheets in graphene fibers, the SSA of graphene is severely reduced. As graphene fibers store charge only through the double layer mechanism, the energy density obtained by them is much lower. Addition of pseudo-capacitive materials such as Transition Metal Oxides (TMOs) or Conducting Polymers (C.Ps) is the usual solution to achieve a higher energy density. However, the low conductivity of TMOs and the structural stability issues of C.P/graphene hybrids limit the rate capability and long cycle life of the fiber supercapacitor. In this work, we employ tungsten nitride (WN), a transition metal nitride (TMN) which are chemically stable compounds and intrinsically provide both high capacitance and high conductivity, to make a hybrid with graphene fiber and compare its performance with tungsten oxide ($WO_3$)-graphene hybrid fiber. We observed that the electrical conductivity and electrochemical performance of the tungsten nitride- graphene hybrid fiber is much higher than the corresponding $WO_3$-graphene hybrid fiber. We can infer that TMNs can prove to be very beneficial when mixed with graphene compared to TMOs for flexible energy storage device applications.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectgraphene▼afiber▼asupercapacitor▼atungsten nitride▼atungsten oxide-
dc.subject그래핀▼a섬유▼a슈퍼 커패시터▼a텅스텐 질화물▼a전기 전도도-
dc.titleTungsten nitride incorporated graphene fibers for wearable supercapacitors-
dc.title.alternative웨어러블 슈퍼캐패시터의 응용으로써 질화 텅스텐이 복합된 그래핀 섬유에 대한 연구-
dc.typeThesis(Master)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :신소재공학과,-
dc.contributor.alternativeauthor핫산, 세이드 알리 살만-
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