KR102237829B1 - 리튬 이차 전지용 음극재, 그 제조방법, 이를 음극으로 포함하는 리튬 이차 전지 - Google Patents
리튬 이차 전지용 음극재, 그 제조방법, 이를 음극으로 포함하는 리튬 이차 전지 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 실시예 2에 따라 제조된 복합체 입자의 SEM 사진이다.
실시예 1 | 실시예 2 | 비교예 1 | 비교예 2 | |
초기효율(%) | 85 | 84 | 84 | 76 |
용량(mAh/g) | 1505 | 1530 | 1603 | 1305 |
용량유지율(%) | 75 | 78 | 45 | 38 |
Claims (16)
- 실란 커플링제로 표면 처리된 규소재를 함유한 비정질 탄소재에 CVD(chemical vapor deposition) 탄소코팅막이 형성된 복합체를 포함하고,
상기 규소재 함량은 상기 복합체 중량대비 1 내지 50중량%인 리튬 이차 전지용 음극재. - 제 1 항에 있어서,
상기 실란 커플링제의 함량은 상기 규소재 100중량부에 대해서 0.01 내지 20중량부인 것을 특징으로 하는 리튬 이차 전지용 음극재. - 제1항에 있어서,
상기 규소재는 나노 규소 및 나노 규소화합물로 이루어진 군에서 선택되는 1종 이상인 것을 특징으로 하는 리튬 이차 전지용 음극재. - 제3항에 있어서,
상기 나노 규소화합물은 SiOx(0<x<2)인 것을 특징으로 하는 리튬 이차 전지용 음극재. - 삭제
- 제1항에 있어서,
상기 CVD 탄소코팅막은 탄화수소 가스로부터 형성된 것임을 특징으로 하는 리튬 이차 전지용 음극재. - 제1항에 있어서,
상기 CVD 탄소코팅막은 열 CVD, 플라즈마 CVD 및 광 CVD 중 선택된 어느 하나의 방법에 의해 형성되는 것을 특징으로 하는 리튬 이차 전지용 음극재. - 제1항에 있어서,
상기 탄소코팅막 함량은 상기 복합체 중량대비 1 내지 20중량% 인 것을 특징으로 하는 리튬 이차 전지용 음극재. - 규소재를 실란 커플링제로 표면 처리하는 단계;
상기 표면 처리된 규소재와 비정질 탄소 전구체를 혼련하고, 탄화시켜 규소재 함유 비정질 탄소재를 형성하는 단계; 및
상기 규소재 함유 비정질 탄소재를 미분쇄하고, 탄화수소 가스로 CVD 탄소코팅하여 복합체를 형성하는 단계를 포함하고,
상기 규소재 함량은 상기 복합체 중량대비 1 내지 50중량%인 리튬 이차 전지용 음극재의 제조방법. - 제9항에 있어서,
상기 탄화처리는 불활성 혹은 환원 분위기 하에서 500 내지 1300℃의 온도 범위로 진행되는 것을 특징으로 하는 리튬 이차 전지용 음극재의 제조방법. - 제9항에 있어서,
상기 CVD 탄소코팅에 사용되는 탄화수소 가스는 벤젠, 톨루엔, 크실렌, 아세틸렌 및 천연가스로 이루어진 군에서 선택되는 1종 이상인 것을 특징으로 하는 리튬 이차 전지용 음극재의 제조방법. - 제9항에 있어서,
상기 CVD 온도는 500 내지 1300℃인 것을 특징으로 하는 리튬 이차 전지용 음극재의 제조방법. - 제9항에 있어서,
상기 CVD 공정은 열 CVD, 플라즈마 CVD 및 광 CVD 중 선택된 어느 하나의 방법으로 수행되는 것을 특징으로 하는 리튬 이차 전지용 음극재의 제조방법. - 제9항에 있어서,
상기 탄소코팅에 의해 형성된 탄소코팅막의 함량은 상기 복합체내 규소 중량대비 1 내지 20중량% 인 것을 특징으로 하는 리튬 이차 전지용 음극재의 제조방법. - 제9항에 있어서,
상기 비정질 탄소 전구체는 페놀수지, 푸란수지, 에폭시수지, 폴리아크릴로니트릴, 폴리아미드수지, 폴리이미드수지, 폴리아미드이미드수지, 합성 피치, 석유계 피치, 석탄계 피치 및 타르로 이루어진 군에서 선택되는 1종 이상인 것을 특징으로 하는 리튬 이차 전지용 음극재의 제조방법. - 제1항 내지 제4항 및 제6항 내지 제8항 중 어느 한 항에 따른 음극재를 포함하는 리튬 이차 전지용 음극.
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KR1020130167130A KR102237829B1 (ko) | 2013-12-30 | 2013-12-30 | 리튬 이차 전지용 음극재, 그 제조방법, 이를 음극으로 포함하는 리튬 이차 전지 |
PCT/KR2014/007393 WO2015102199A1 (ko) | 2013-12-30 | 2014-08-08 | 리튬 이차 전지용 음극재, 그 제조방법, 이를 음극으로 포함하는 리튬 이차 전지 |
US15/107,727 US9979007B2 (en) | 2013-12-30 | 2014-08-08 | Negative electrode material for lithium secondary battery, production method for same, and lithium secondary battery comprising same as negative electrode |
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US20160149207A1 (en) * | 2014-11-21 | 2016-05-26 | Nexeon Limited | Surface treated silicon containing active materials for electrochemical cells |
KR102006721B1 (ko) | 2015-06-22 | 2019-08-02 | 주식회사 엘지화학 | 리튬 이차 전지용 전극, 이의 제조 방법, 이를 포함하는 리튬 이차 전지용 전극 조립체, 및 이를 포함하는 리튬 이차 전지 |
US20180287140A1 (en) * | 2015-09-24 | 2018-10-04 | Panasonic Intellectual Property Management Co., Ltd. | Negative electrode active material for nonaqueous electrolyte secondary batteries and negative electrode |
DE102016202458A1 (de) | 2016-02-17 | 2017-08-17 | Wacker Chemie Ag | Verfahren zur Herstellung von Si/C-Kompositpartikeln |
CN106469814B (zh) * | 2016-04-14 | 2019-11-29 | 山东圣泉新能源科技有限公司 | 一种包覆剂、负极材料、锂离子电池及其制备方法 |
US10522840B2 (en) * | 2017-03-26 | 2019-12-31 | Intecells, Inc. | Method of making anode component by atmospheric plasma deposition, anode component, and lithium-ion cell and battery containing the component |
CN107579203B (zh) * | 2017-08-09 | 2020-12-22 | 华南理工大学 | 一种锂离子电池硅掺杂碳多孔复合薄膜及其制备方法 |
CN108232140A (zh) * | 2017-12-20 | 2018-06-29 | 上海蓄熙新能源材料检测有限公司 | 一种改性硅基材料的制备方法、及其锂离子电池 |
CN109004203B (zh) * | 2018-08-02 | 2020-12-01 | 内蒙古三信实业有限公司 | 一种硅碳复合负极材料及其制备方法 |
KR102530678B1 (ko) | 2019-01-21 | 2023-05-09 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 음극활물질, 이를 포함하는 음극 및 리튬 이차전지 |
WO2021205774A1 (ja) * | 2020-04-10 | 2021-10-14 | 株式会社クレハ | 非水電解質二次電池負極用炭素質材料の製造方法、非水電解質二次電池電極の製造方法及び非水電解質二次電池の製造方法 |
CN113745465B (zh) * | 2021-08-31 | 2023-01-24 | 长沙矿冶研究院有限责任公司 | 一种硅碳复合材料的制备方法 |
KR102500979B1 (ko) * | 2021-09-13 | 2023-02-17 | 연세대학교 산학협력단 | 이차 전지용 실리콘 음극 활물질 및 이의 제조 방법 |
CN115332496B (zh) * | 2022-07-15 | 2023-05-02 | 胜华新材料集团股份有限公司 | 一种锂离子电池所用硅氧复合材料的制备方法 |
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US20160329555A1 (en) | 2016-11-10 |
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