KR101803568B1 - 비수전해질 이차 전지용 부극 활성 물질의 제조 방법 및 비수전해질 이차 전지용 부극 활성 물질 및 비수전해질 이차 전지용 부극재, 비수전해질 이차 전지용 부극, 비수전해질 이차 전지 - Google Patents
비수전해질 이차 전지용 부극 활성 물질의 제조 방법 및 비수전해질 이차 전지용 부극 활성 물질 및 비수전해질 이차 전지용 부극재, 비수전해질 이차 전지용 부극, 비수전해질 이차 전지 Download PDFInfo
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- KR101803568B1 KR101803568B1 KR1020110048290A KR20110048290A KR101803568B1 KR 101803568 B1 KR101803568 B1 KR 101803568B1 KR 1020110048290 A KR1020110048290 A KR 1020110048290A KR 20110048290 A KR20110048290 A KR 20110048290A KR 101803568 B1 KR101803568 B1 KR 101803568B1
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- South Korea
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- negative electrode
- secondary battery
- silicon
- electrolyte secondary
- active material
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Abstract
비수전해질을 이용하는 이차 전지용의 부극 활성 물질의 제조 방법으로서, 적어도, 감압 하에서 온도를 300 내지 800℃로 제어한 기판 상에 금속 규소 원료를 증착시켜 규소를 퇴적시키고, 상기 퇴적시킨 규소를 분쇄·분급하는 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질의 제조 방법에 관한 것이다.
Description
Claims (15)
- 적어도, 감압 하에서 온도를 300 내지 800℃로 제어한 기판 상에 금속 규소를 원료로 하여 증착에 의해 규소를 퇴적시키고,
상기 퇴적시킨 규소를 분쇄·분급하는 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질의 제조 방법. - 제1항에 있어서, 퇴적시킨 규소를 600 내지 1100℃에서 가열 처리를 행하는 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질의 제조 방법.
- 제1항 또는 제2항에 있어서, 상기 금속 규소를 원료로 하여 상기 기판 상에 규소를 증착시킬 때에, 붕소, 알루미늄, 인, 티타늄, 바나듐, 크롬, 망간, 철, 코발트, 니켈, 구리, 아연, 비소, 주석, 탄탈, 텅스텐으로부터 선택되는 1종 또는 2종 이상의 도펀트를 상기 퇴적시키는 규소에 도핑하는 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질의 제조 방법.
- 제1항 또는 제2항에 있어서, 상기 분쇄·분급은 상기 비수전해질 이차 전지용 부극 활성 물질의 입경이 레이저 회절 산란식 입도 분포 측정법에 의한 부피 평균치 D50으로 1 ㎛ 이상 20 ㎛ 이하가 되도록 행하는 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질의 제조 방법.
- 제1항 또는 제2항에 있어서, 상기 기판은 규소 퇴적 시에 규소와 합금화하지 않는 재료로 이루어지는 것을 이용하는 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질의 제조 방법.
- 제1항 또는 제2항에 기재된 비수전해질 이차 전지용 부극 활성 물질의 제조 방법에 의해서 제조된 것임을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질.
- 적어도, 진밀도가 2.250 g/㎤보다 높고 2.330 g/㎤ 미만이고, BET 비표면적이 0.1 내지 5.0 ㎡/g이며, 입자의 압축 강도가 400 MPa를 초과하고 800 MPa보다 작은 다결정 규소를 포함하고,
상기 다결정 중의 규소 입자는 결정 입경이 X선 회절 패턴의 분석에 있어서 2θ=28.4° 부근의 Si(111)에 귀속되는 회절선의 반치전폭으로부터 쉐러법(Scherrer법)으로 구해지는 값이 20 nm 이상 100 nm 이하인 것을 특징으로 하는 비수전해질 이차 전지용 부극 활성 물질. - 적어도, 제7항에 기재된 비수전해질 이차 전지용 부극 활성 물질을 포함하는 것임을 특징으로 하는 비수전해질 이차 전지용 부극재.
- 제8항에 있어서, 결착제를 더 함유하는 것임을 특징으로 하는 비수전해질 이차 전지용 부극재.
- 제9항에 있어서, 상기 결착제가 폴리이미드 수지인 것을 특징으로 하는 비수전해질 이차 전지용 부극재.
- 제9항 또는 제10항에 있어서, 도전제를 더 포함하는 것이며, 상기 비수전해질 이차 전지용 부극재에 대한 상기 비수전해질 이차 전지용 부극 활성 물질의 비율이 60 내지 97 질량%, 상기 결착제의 비율이 3 내지 20 질량%, 상기 도전제의 비율이 0 내지 37 질량%인 것을 특징으로 하는 비수전해질 이차 전지용 부극재.
- 제11항에 있어서, 상기 도전제는 물 또는 용제에 도전 물질이 분산된 분산액으로 이루어지는 것이고, 상기 비수전해질 이차 전지용 부극재에 대한 상기 비수전해질 이차 전지용 부극 활성 물질의 비율이 60 내지 96 질량%, 상기 도전 물질의 비율이 1 내지 37 질량%인 것을 특징으로 하는 비수전해질 이차 전지용 부극재.
- 제8항 내지 제10항 중 어느 한 항에 기재된 비수전해질 이차 전지용 부극재를 포함하는 부극으로서, 충전 전후의 막 두께 변화가 3배를 초과하지 않는 것임을 특징으로 하는 비수전해질 이차 전지용 부극.
- 적어도, 제13항에 기재된 비수전해질 이차 전지용 부극을 이용한 부극 성형체와, 정극 성형체와, 세퍼레이터와, 비수전해질을 포함하는 것임을 특징으로 하는 비수전해질 이차 전지.
- 제14항에 있어서, 상기 비수전해질 이차 전지가 리튬 이온 이차 전지인 것을 특징으로 하는 비수전해질 이차 전지.
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WO2009063801A1 (ja) * | 2007-11-12 | 2009-05-22 | Sanyo Electric Co., Ltd. | 非水電解質二次電池負極材、非水電解質二次電池用負極及び非水電解質二次電池、並びに非水電解質二次電池負極材の活物質用多結晶珪素粒子の製造方法 |
JP2009170265A (ja) * | 2008-01-16 | 2009-07-30 | Mitsubishi Chemicals Corp | 層状粉末物質およびその製造方法、非水電解質二次電池用電極材、および非水電解質二次電池用負極、並びに非水電解質二次電池 |
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