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      리튬이온 2차 전지 음극을 탄소재료 제조 = Preperation of Carbon Materials for The Anode of Li-ion Secondary Batteries

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      https://www.riss.kr/link?id=T8948736

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      다국어 초록 (Multilingual Abstract)

      The double layered carbon materials were prepared from mesophase pitch, artificial graphite, natural graphite and coke coated with coal-tar pitch. The coal-tar pitch as a coating species was dissolved by organic solvents like toluene and light oil. The coating of coal-tar pitch on the mesophase pitch, artificial graphite, natural graphite and coke was confirmed by increasing of the FWHM (full width at half maximum) of X-ray diffraction and of percentage of hydrogen by CHN analysis. However, the coating layers were not confirmed by SEM. The coated carbonaceous materials were carbonized at 800 to 1000℃ in nitrogen atmosphere, and then graphitized at 2600℃ for using of anode in Li-ion battery.
      Performance of double layered carbonaceous materials as the anode were carried out at the coin type cell. Performance of anode was measured by the charge and discharge capacity. The capacities of charge and discharge were changed by thermal treatment and kind of precursors. However, the coating methods showed the little differences in charge capacity. The lower heat-treatment at 800℃ showed the higher capacity rather than at 1000℃. And also, the lower capacity shown the graphitized double layered materials rather than carbonized materials.
      Conclusionally, the performances of anode materials were changed by crystallity, composition, microstructures of carbonaceous materials.

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      The double layered carbon materials were prepared from mesophase pitch, artificial graphite, natural graphite and coke coated with coal-tar pitch. The coal-tar pitch as a coating species was dissolved by organic solvents like toluene and light oil. Th...

      The double layered carbon materials were prepared from mesophase pitch, artificial graphite, natural graphite and coke coated with coal-tar pitch. The coal-tar pitch as a coating species was dissolved by organic solvents like toluene and light oil. The coating of coal-tar pitch on the mesophase pitch, artificial graphite, natural graphite and coke was confirmed by increasing of the FWHM (full width at half maximum) of X-ray diffraction and of percentage of hydrogen by CHN analysis. However, the coating layers were not confirmed by SEM. The coated carbonaceous materials were carbonized at 800 to 1000℃ in nitrogen atmosphere, and then graphitized at 2600℃ for using of anode in Li-ion battery.
      Performance of double layered carbonaceous materials as the anode were carried out at the coin type cell. Performance of anode was measured by the charge and discharge capacity. The capacities of charge and discharge were changed by thermal treatment and kind of precursors. However, the coating methods showed the little differences in charge capacity. The lower heat-treatment at 800℃ showed the higher capacity rather than at 1000℃. And also, the lower capacity shown the graphitized double layered materials rather than carbonized materials.
      Conclusionally, the performances of anode materials were changed by crystallity, composition, microstructures of carbonaceous materials.

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      목차 (Table of Contents)

      • 목차
      • LIST OF FIGURES
      • LIST OF TABLES
      • 국문요약
      • 제1장 서론 = 1
      • 목차
      • LIST OF FIGURES
      • LIST OF TABLES
      • 국문요약
      • 제1장 서론 = 1
      • 제2장 이론적 배경 = 6
      • 2.1 리튬이온 2차 전지의 원리와 특징 = 6
      • 2.2 리튬이온 2차 전지의 구조 및 구성도 = 9
      • 2.3 리튬이온 2차 전지의 특성 = 12
      • 2.3.1 리튬이온 2차 전지의 충전 특성 = 12
      • 2.3.2 리튬이온 2차 전지의 방전 특성 = 16
      • 2.3.3 리튬이온 2차 전지의 자가 방전특성 = 21
      • 2.3.4 리튬이온 전지의 충방전 횟수 = 21
      • 2.4 리튬금속과 탄소부극 특성비교 = 23
      • 2.5 리튬 2차 전지 음극용 탄소재료 = 25
      • 2.5.1 흑연질 재료 = 25
      • 2.5.2 저결정성 탄소재료 = 29
      • 2.5.2.1 Soft 탄소재료 = 30
      • 2.5.2.2 Hard 탄소재료 = 34
      • 2.6 탄소재료의 구조와 리튬 흡장량과의 관계 = 36
      • 2.7 탄소재료의 충·방전 반응 특성 = 38
      • 2.8 전해액과 탄소부극과의 관계 = 43
      • 제3장 실험방법 = 45
      • 3.1 원료의 분석 = 45
      • 3.2 원료의 분석결과 = 45
      • 3.2.1 원소분석결과 = 45
      • 3.2.2 SEM 분석결과 = 47
      • 3.3 Mesophase를 소구체로 사용한 이중층 탄소재료 제조 = 49
      • 3.3.1 Mesophase 제조 = 49
      • 3.3.2 Mesophase pitch를 소구체로 사용한 이중층 탄소재료의 제조 = 51
      • 3.3.3 Mesophase pitch의 이방성상 관찰 = 51
      • 3.4 인조흑연, 천연흑연, Coke를 소구체로 사용한 이중층 탄소재료의 제조 = 53
      • 3.5 충방전 실험 = 53
      • 제4장 실험결과 = 54
      • 4.1 Mesophase pitch의 이방성상 관찰 = 54
      • 4.2 SEM 분석 = 56
      • 4.3 XRD 분석 = 58
      • 4.4 수소함유율 분석 = 62
      • 4.5 d(A)값과 방전용량 비교 = 65
      • 제5장 결론 = 68
      • REFERENCE = 69
      • ABSTRACT = 71
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