KR20140092011A - 리튬 금속 복합 산화물-고분자 매트릭스 복합체, 이의 제조 방법 및 이를 포함하는 전기 화학 소자 - Google Patents
리튬 금속 복합 산화물-고분자 매트릭스 복합체, 이의 제조 방법 및 이를 포함하는 전기 화학 소자 Download PDFInfo
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Abstract
본 발명에 의한 리튬 금속 복합 산화물-고분자 매트릭스 복합체는 유기 무기 복합 재료로서 하이브리드 커패시터 양극활물질로 사용될 경우 상기 고분자 매트릭스가 충방전 사이클 동안 상기 리튬 복합 산화물에 발생하는 부피 팽창 등의 기계적 스트레스에 저항할 수 있는 구조를 제공함으로써 결과적으로 고 전류 속도에서 높은 에너지 밀도를 얻을 수 있다.
Description
도 2는 본 발명의 실시예에서 합성한 Li(Mn1/3Ni1/3Fe1/3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤의 XRD 패턴 측정 결과를 나타낸다.
도 3은 본 발명의 실시예에서 합성한 Li(Mn1 /3Ni1 /3Fe1 /3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤의 FT-IR 스펙트럼을 측정하고 그 결과를 나타낸다.
도 4는 본 발명의 실시예에서 합성한 Li(Mn1/3Ni1/3Fe1/3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤의 SEM 사진 및 TEM 사진을 측정한 결과를 나타낸다.
도 5는 본 발명의 실시예에서 합성한 Li(Mn1 /3Ni1 /3Fe1 /3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤의 비표면적을 측정한 결과를 나타낸다.
도 6은 본 발명의 실시예에서 합성한 Li(Mn1 /3Ni1 /3Fe1 /3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤을 포함하는 하이브리드커패시터에 있어서 Cyclic voltametry 를 측정한 결과를 나타낸다.
도 7은 본 발명의 실시예에서 합성한 Li(Mn1 /3Ni1 /3Fe1 /3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤을 포함하는 하이브리드 커패시터에 있어서 충방전 특성을 측정한 결과를 나타낸다.
도 8은 본 발명의 실시예에서 합성한 Li(Mn1 /3Ni1 /3Fe1 /3)O2 및 Li(Mn1/3Ni1/3Fe1/3)O2 -폴리아닐린, Li(Mn1 /3Ni1 /3Fe1 /3)O2 - 폴리피롤을 포함하는 하이브리드커패시터에 있어서 0.72 에서 2.15 A/g 까지의 서로 다른 전류 밀도에서의 수명 특성을 나타내었다.
도 9는 본 발명의 실시예에서 합성한 Li(Mn1 /3Ni1 /3Fe1 /3)O2-폴리아닐린, Li(Mn1/3Ni1/3Fe1/3)O2 - 폴리피롤을 포함하는 하이브리드커패시터에 있어서 0.72 에서 2.15 Ag-1까지의 서로 다른 전류 밀도에서의 수명 특성을 나타내었다.
Claims (11)
- 고분자 매트릭스 내에 리튬 금속 복합 산화물이 분산되어 있는 리튬 금속 복합 산화물-고분자 매트릭스 복합체.
- 제 1 항에 있어서,
상기 고분자 매트릭스는 피롤, 아닐린, 티오펜, 폴리아세틸렌(polyacetylene), 폴리(p-페닐렌), 폴리옥시페나진(Polyoxyphenazine) 및 이들의 유도체로 이루어진 그룹에서 선택되는 1종 이상의 단량체로부터 형성되는 것인 리튬 금속 복합 산화물-고분자 매트릭스 복합체.
- 제 1 항에 있어서,
상기 리튬 금속 복합 산화물은 아래 일반식으로 표시되는 것인 리튬 금속 복합 산화물-고분자 매트릭스 복합체.
Li1+x[MnaNibFec]O2
(상기 일반식에서 -0.3≤x≤0.4, 0.2≤a≤0.7, 0.2≤b≤0.5, 0.1≤c≤0.5 이고, a+b+c = 1 의 조건을 만족함)
- 제 1 항에 있어서,
상기 리튬 금속 복합 산화물-고분자 복합체는 α-NaFeO2 층상 구조인 것을 특징으로 하는 리튬 금속 복합 산화물-고분자 매트릭스 복합체.
- 제 1 항에 있어서,
상기 리튬 금속 복합 산화물-고분자 복합체 내에서 상기 리튬 금속 복합 산화물과 상기 고분자 매트릭스는 화학적 결합되는 것을 특징으로 하는 리튬 금속 복합 산화물-고분자 매트릭스 복합체.
- 상기 고분자 매트릭스의 형성 단계에서 리튬 금속 복합 산화물을 투입하여 산화 중합 반응시키는 것을 특징으로 하는 제 1 항에 의한 리튬 금속 복합 산화물-고분자 매트릭스 복합체의 제조 방법.
- 제 6 항에 있어서,
리튬 금속 복합 산화물, 단량체 혼합물을 준비하는 단계;
상기 혼합물을 산화제가 포함된 수용액에 투입하여 상기 단량체를 산화 중합시키는 단계; 및
상기 중합 반응물을 세정하고 회수하는 단계; 를 포함하는 리튬 금속 복합 산화물-고분자 매트릭스 복합체의 제조 방법
- 제 7 항에 있어서,
상기 리튬 금속 복합 산화물, 단량체 혼합물을 준비하는 단계에서는 상기 리튬 금속 복합 산화물 100 중량부당 상기 단량체는 20중량부 내지 50 중량부의 비율로 혼합되는 것인 리튬 금속 복합 산화물-고분자 매트릭스 복합체의 제조 방법
- 제 7 항에 있어서,
상기 리튬 금속 복합 산화물은 초음파 처리되는 것인 리튬 복합 산화물-고분자 매트릭스 복합체의 제조 방법
- 제 1 항에 의한 리튬 금속 복합 산화물-고분자 매트릭스 복합체를 포함하는 전기 화학 소자
- 제 10 항에 있어서,
상기 전기 화학 소자는 리튬 이차 전지, 커패시터, 하이브리드 커패시터 인 것인 전기 화학 소자
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