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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Novel Nanocomposite Anode Materials of 1D Ga2O3 Nanostructure and Graphene Nanosheet Applicable for Lithium Ion Batteries

등록일
2014년 9월 3일 13시 41분 19초
접수번호
1436
발표코드
MAT.P-1169 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
PATILSHARADBANDU, 황성주*
이화여자대학교 화학·나노과학과, Korea
One dimensional (1D) nanostructured Ga2O3 is hybridized with reduced graphene oxide (rG-O) via the crystal growth of gallium oxyhydroxide nanorods in the presence of colloidal graphene oxide (G-O) nanosheets and the following heat-treatment at elevated temperature under inert atmosphere. Depending on the content of rG-O nanosheets in the nanocomposite, the heat-treatment induces a phase transformation from gallium oxyhydroxide to gallium oxide with its different polymorphs such as α-, β-, and γ-phase. In the obtained nanocomposites, layer-structured 1D Ga2O3 nanorods with the aspect ratio of ~5 are anchored over the surface of rG-O nanosheets. The house-of-cards stacking of sheet-like crystallites leads to the remarkable expansion of surface area to ~340 m2g-1and the formation of mesoporous structure with the average pore diameter of ~3-5 nm. The present nanocomposites show promising anode performance with discharge capacity (>750 mAhg-1 after 40 cycles), excellent cyclability, and good rate characteristics, which is superior to that of Ga2O3 nanorods. The present study clearly demonstrates the usefulness of gallium oxide as new anode material for lithium ion batteries.

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