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Electrochemical performances of cubic shape CaSnO3 as anode Material for lithium ion batteries

등록일
2007년 8월 21일 11시 54분 23초
접수번호
1511
발표코드
37P355포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅲ>
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
김현식, 성영은
서울대학교 화학생물공학부,
Lithium ion battery has highest energy density among commercial rechargeable batteries. Carbon materials are commercially used as the anode material of Li ion battery. The theoretical capacity of carbon material is 372 mAh/g-1, while higher energy density battery is demanded. So, considerable effort has been devoted to the study of Sn-based metals as alternative anode for Lithium ion battery. However, it was found that these alloy systems showed poor capacity retention during their cycle life. Sn oxide react with Li-ion and form Sn grains and Li2O in the first charge. During the substantial charge and discharge, the Sn works as the active material and the Li2O work as the inert matrix surrounding the active Sn grains, suppressing the capacity fading. We report on the anodic behavaior of CaSnO3 in a similar concept and demonstrate that nano-crystallites as high capacity anode material for Li-ion batteries with capacity retention and rate capability.The structural and electrochemical characterization of CaSnO3 as active material was performed by X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), cyclic voltammetry (CV) and cell test.

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