KR940022945A - 재충전 가능한 리튬전지 및 전지에 사용하는 애노드의 제조방법 - Google Patents

재충전 가능한 리튬전지 및 전지에 사용하는 애노드의 제조방법 Download PDF

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KR940022945A
KR940022945A KR1019940005197A KR19940005197A KR940022945A KR 940022945 A KR940022945 A KR 940022945A KR 1019940005197 A KR1019940005197 A KR 1019940005197A KR 19940005197 A KR19940005197 A KR 19940005197A KR 940022945 A KR940022945 A KR 940022945A
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anode
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노부하루 코시바
캥이치 타카타
에미 아사카
마코토 나카니시
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모리시타 요이찌
마쯔시다덴기산교 가부시기가이샤
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Abstract

Li/Li+애노드에 대해 방전전위가 2V이상인 캐서드, 리튬을 도핑 및 미도핑할 수 있고 스피넬구조를 지니며 일반식 LixTitO4(식중, 0.8 ≤x 1.4이고, 1.6 ≤y ≤2.2)로 표현된 티탄산리튬으로 이루어진 반응생성물로 형성된 애노드, 캐서드와 애노드를 서로 분리시키는 분리기 및 적어도 분리기에 주입되어 있고 비수용성용매에 리튬염이 용해되어 있는 전해액으로 이루어지며, Cu타겟을 사용한 x선회절분석시 상기 반응생성물이 적어도 4.84 ±0.02Å, 2.53 ±0.02Å, 2.09 ±0.02Å, 1.48 ±0.02Å에서 회절피크를 지니고, 4.84 ±0.02Å에서의 피크세기와 1.48 ±0.02Å에서의 피크세기율이 100:30 ±10인 것을 특징으로 하는 재충전가능한 리튬전지 및 애노드의 제조방법으로, 반응생성물은 티탄산리튬 혹은 티탄산리튬과 루틸형이산화티탄의 혼합결정으로 이루어질 수 있다.

Description

재충전 가능한 리튬전지 및 전지에 사용하는 애노드의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제3도는 본 발명의 실시예에서 얻은 재충전가능한 리튬전지 A2∼A4, 참고용전지A1 및 A5와 비교용전지 G에 대한 사이클수명특성을 보인 그래프, 제4도는 본 발명의 다른 실시예로 얻은 재충전가능한 리튬전지 B에 대한 제3도와 유사한 그래프, 제5도는 본 발명의 또다른 실시예로 얻은 재충전가능한 리튬전지 C1∼C4에 대한 제3도와 유사한 그래프, 제6도는 본 발명의 또다른 실시예로 얻은 재충전가능한 리튬전지 D,E,F의 방전커브, 제7도는 본 발명의 D,E,F에 대한 시이클수명 특성을 보인 그래프.

Claims (14)

  1. Li/Li+애노드에 대해 방전전위가 2V이상인 캐서드, 리튬을 도핑 및 미도핑할 수 있고, 스피넬구조를 지니며 일반식 LixTitO4(식중, 0.8 ≤x 1.4이고, 1.6 ≤y ≤2.2)로 표현된 티탄산리튬으로 이루어진 반응생성물로 형성된 애노드, 캐서드와 애노드를 서로 분리시키는 분리기, 및 적어도 분리기에 주입되어 있고 비수용성용매에 리튬염이 용해되어 있는 전해액으로 이루어지며, Cu타겟을 사용한 x선회절분석시 상기 반응생성물이 적어도 4.84 ±0.02Å, 2.53 ±0.02Å, 2.09 ±0.02Å, 1.48 ±0.02Å에서 회절피크를 지니고, 4.84 ±0.02Å에서의 피크세기와 1.48 ±0.02Å에서의 피크세기율이 100:30 ±10인 것을 특징으로 하는 재충전가능한 리튬전지.
  2. 제1항에 있어서, 상기 반응생성물은 기본적으로 상기 티탄산리튬으로 이루어진 것을 특징으로 하는 재충전가능한 리튬전지.
  3. 제1항 또는 제2항에 있어서, 상기 티탄산리튬은 기본적으로 LiTi2O4, Li4/3Ti5/3O4혹은 Li0.8Ti2.2O4로 이루어진 것을 특징으로 하는 재충전가능한 리튬전지.
  4. 제1항 또는 제2항에 있어서, 상기 전해액의 상기 리튬염은 LiPF6, LiCF3SO3, LiBF4, LiClO4, LiN(CF3SO2)2및 이들 혼합물로 이루어지는 군에서 선택된 것을 특징으로 하는 재충전가능한 리튬전지.
  5. Li/Li+애노드에 대해 방전전위가 2V이상인 캐서드; 리튬을 도핑 및 미도핑할 수 있고, 스피넬구조를 지니며, 일반식 LixTitO4(식중, 0.8 ≤x 1.4이고, 1.6 ≤y ≤2.2)로 표현된 티탄산리튬과 루틸형 이산화티탄의 혼합결정으로 이루어진 반응생성물로 형성된 애노드; 캐서드 및 애노드를 서로 분리시키는 분리기; 및 적어도 분리기에 주입되어 있고 비수용성용매에 리튬염이 용해되어 있는 전해액으로 이루어지며, Cu타겟을 사용한 x선회절분석시 상기 반응생성물이 적어도 4.48 ±0.02Å, 3.25 ±0.02Å, 2.53 ±0.02Å, 2.49 ±0.02Å, 2.19 ±0.02Å, 2.09 ±0.02Å, 1.69 ±0.02Å 및 1.48 ±0.02Å에서 회절피크를 지니는 것을 특징으로 하는 재충전가능한 리튬전지.
  6. 제5항에 있어서, 상기 반응생성물은 기본적으로 상기 혼합결정으로 이루어지는 것을 특징으로하는 재충전가능한 리튬전지.
  7. 제5항 또는 제6항에 있어서, 상기 티탄산리튬 및 상기 루틸형산화티탄은 1개의 혼합결정속에 공존하는 것을 특징으로 하는 재충전가능한 리튬전지.
  8. 제5항 또는 제6항에 있어서, 상기 반응생성물 4.84 ±0.02Å고 1.48 ±0.02Å에서의 피크세기율이 100:30 ±10이고, 3.25 ±0.02Å, 1.69 ±0.02Å 및 2.09 ±0.02Å에서의 피크세기율이 100:50 ±10:60 ±10인 것을 특징으로하는 재충전가능한 리튬전지.
  9. 제5항 또는 6항에 있어서, 상기 티탄산리튬은 기본적으로 LiTi2O4혹은 Li4/3Ti5/3O4로 이루어지는 것을 특징으로 하는 재충전가능한 리튬전지.
  10. 제5항 똔느 6항에 있어서, 상기 전해액속의 상기 리튬염은 LiPF6, LiCF3SO3, LiBF4, LiClO4, LiN(CF3SO2)2및 그 혼합물에서 선택되는 것을 특징으로 하는 재충전가능한 리튬전지.
  11. 재노드에 대해 2V 이상의 방전전위를 지닌 캐서드. 캐서드와 애노드를 서로 분리시키는 분리기, 및 적어도 분리기에 주입되어있고, 비수성용매에 리튬염을 용해시킨 전해액으로 이루어지는 형태의 재충전가능한 리튬전지에 있어, 리튬을 도핑 및 미도핑할 수 있는 애노드를 형성하는 방법으로, 리튬화합물 및 애너테이스 혹은 루틸형이산화티탄을 리륨화합물 및 에너테이스 혹은 루틸형이산화티탄의 Li/Ti의 원자비가 0.8:1∼1:3으로 충분한 가열조건하에 열처리하여, 스퍼넬구조를 지니고 Li4/3Ti5/3O4로 표현되는 티탄산리튬화합물로 이루어진 생성물을 얻고, 분말상 생성물을 형성하여 애노드체를 얻는 공정으로 이루어진 것을 특징으로 하는 애노드의 제조방법.
  12. 제11항에 있어서, 상기 리튬화합물은 수산화리튬은 리튬카보네이트인 것을 특징으로 하는 애노드의 제조방법.
  13. 제11항 또는 제12항에 있어서, 열처리를 800∼950℃에서 행하는 것을 특징으로 하는 애노드의 제조방법.
  14. 제11항 또는 제12항에 있어서, 상기 결정생성물은 기본적으로 상기 티탄산리톰 혹은 상기 티탄산리튬과 루틸형이산화티탄의 혼합결정으로 이루어지는 것을 특징으로 하는 애노드의 제조방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940005197A 1993-03-17 1994-03-16 재충전가능한 리튬전지 및 전지에 사용하는 애노드의 제조방법 KR970007518B1 (ko)

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JP05724393A JP3502118B2 (ja) 1993-03-17 1993-03-17 リチウム二次電池およびその負極の製造法

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JPH097638A (ja) * 1995-06-22 1997-01-10 Seiko Instr Inc 非水電解質二次電池
JPH09283144A (ja) * 1996-04-16 1997-10-31 Matsushita Electric Ind Co Ltd 非水電解液二次電池およびその正極活物質
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