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  • 08월 18일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 NiO nanopaticles with plate structure grown on graphene as anode material for lithium-ion battery

2011년 8월 1일 15시 17분 11초
ELEC.O-7 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 15시 : 30분
전기화학 - Oral presentation of future electrochemists
저자 및
황승기, 류광선
울산대학교 화학과, Korea
Lithium-ion batteries (LIB) have been widely used in portable electronic devices and viewed as a promising power source in the application of electric vehicle. Many research groups reported the enhancement of LIB properties on higher specific capacity and more durable cycling performance. Nanosized metal oxides, such as Co3O4, SnO2, FeOx, and NiO, have been intensively studied as anode materials for LIB aimed at achieving higher specific capacities than graphite. Graphene has some advantages such as high surface area, electrical conductivity, high flexibility, mechanical strength, and lightweight. Graphene is an ideal single-atom thick substrate for growth of functional nanomaterials to render them electrochemically active and electrically conductive to the outside of current collectors. In this study, a plate structure of NiO was dispersed uniformly over a graphene material with a very high surface area to increase the cycling performance and capacity. We have prepared graphene with modified Hummers method. Urea was added to the graphene suspension and then graphene treated with urea was dried for 24 h at oven. The dried graphene powder was added to the metal salt solvent. Finally, we obtained the graphene/NiO composite material. Graphene/NiO composite has been characterized by a variety of electron microscopic and other physical techniques such as FE-SEM, FE-TEM, and XRD. For measuring the electrochemical performances of the graphene/NiO composite, we used A.C. impedance, CV, charge-discharge capacity, and cycling performance test.