서지주요정보
이차전지용 흑연화 탄소분말의 투과전자현미경 연구 = A transmission electron microscopy study on the graphitized carboneous powders for rechargeable batteries
서명 / 저자 이차전지용 흑연화 탄소분말의 투과전자현미경 연구 = A transmission electron microscopy study on the graphitized carboneous powders for rechargeable batteries / 허윤.
발행사항 [대전 : 한국과학기술원, 2000].
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소장정보

등록번호

8011094

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 00044

휴대폰 전송

도서상태

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반납예정일

리뷰정보

초록정보

$B_2O_3$-doped carboneous powders for the anode material in lithium ion secondary batteries were prepared with various graphitization atmosphere. It was studied that such the cell performances as capacity and efficiency are related to the surface micro-structures of the graphitized carboneous powders using a transmission electron microscopy. Amorphous carbon is unsuitable to be prepared as the cell electrodes. The doping of $B_2O_3$ into carbon leads to form the boron-based compounds such as $B_4C$ and BN. These play roles in the catalysis on the growth of graphitic crystals and increases the capacity. It was analyzed that highly-crystallized graphites distributed on the surface of particles when the soft carbon (cokes) doped with $B_2O_3$ is graphitized with high-resolution transmission electron microscopy (HRTEM) images and electron diffraction patterns. When the soft carbon doped with $B_2O_3$ was graphitized in $N_2$ atmosphere(air), hexagonal boron nitrides was formed at the edge of graphite layers, which was analyzed to be the cause of decrease in the cell capacity and efficiency. And such special structures as the edge of graphite layers, loop structures and onion rings were likely to influences on the cell efficiency. $B_2O_3$/carboneous powders were coated with mesophase pitch (MP), amorphous carbon and graphitized. Coated layers were graphitized in parts, but coated amorphous layers caused the decrease of the cell efficiency. In the selected area electron diffraction (SAED) patterns, we observed the double diffraction by the strongly diffracted electron beam and the elliptical diffraction patterns. Through these selected area electron diffraction patterns, the structure of graphites and the degrees of graphitization were analyzed.

서지기타정보

서지기타정보
청구기호 {MMS 00044
형태사항 iv, 111 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Yoon Huh
지도교수의 한글표기 : 이정용
지도교수의 영문표기 : Jeong-Yong Lee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 108-111
주제 투과전자현미경
리튬이온이차전지
탄소 부극재
흑연화
붕소계 화합물
TEM
Lithium ion secondary battery
Carboneous anode
Graphitization
Boron-based compound
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