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  • 02월 22일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Hard Templating Synthesis of Mesoporous and Nanowire SnO2 Lithium Battery Anode Materials

등록일
2008년 2월 15일 16시 44분 21초
접수번호
1425
발표코드
금34K5구 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 15시 : 30분
발표형식
구두발표
발표분야
재료화학
저자 및
공동저자
김혜선, 조재필1
한양대학교 바이오나노학과,
1한양대학교(안산) 응용화학과,
Mesoporous and nanowire SnO2 anode materials for lithium batteries were prepared using KIT-6 and SBA-15 SiO2 templates, and their electrochemical properties were compared at different current rates. The as-prepared SnO2 nanowires had a diameter of 6 nm and a length of > 3 μm and Brunauer–Emmett–Teller (BET) surface area of 80 m2/g while mesoporous SnO2 showed a pore size of 3.8 nm and a BET surface area of 160 m2/g. The charge capacities of these two anodes were similar to each other at 800 mAh/g, but mesoporous SnO2 showed much improved cycle life performance and rate capabilities because of its higher surface area than nanowire SnO2. Especially, the capacity retention of the mesoporous SnO2 was 98%, compared with 31% for the SnO2 nanowires at a 10C rate (= 4000 mA/g). The improved the electrochemical performance of the mesoporous SnO2 was related to that the regular porosity permitted thorough flooding of the electrolyte between the particles, and that mesopores acted as a buffer zone during the volume contraction and expansion of Sn.

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