WO2014088270A1 - 리튬 이차전지용 고용량 음극 활물질, 이의 제조 방법 및 이를 포함한 리튬 이차전지 - Google Patents
리튬 이차전지용 고용량 음극 활물질, 이의 제조 방법 및 이를 포함한 리튬 이차전지 Download PDFInfo
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- WO2014088270A1 WO2014088270A1 PCT/KR2013/011032 KR2013011032W WO2014088270A1 WO 2014088270 A1 WO2014088270 A1 WO 2014088270A1 KR 2013011032 W KR2013011032 W KR 2013011032W WO 2014088270 A1 WO2014088270 A1 WO 2014088270A1
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- negative electrode
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- the content of the shell part may be 1 to 30 parts by weight or 2 to 10 parts by weight based on 100 parts by weight of the core part.
- the shell part of the present invention has the above content, it is possible to ensure uniform electrical conductivity, as well as to minimize volume expansion of the negative electrode active material.
- the content of the shell portion is preferably 1 to 30 parts by weight or 2 to 10 parts by weight based on 100 parts by weight of the core part, and the shell part preferably has a thickness of 0.01 to 5 ⁇ m or a thickness of 0.02 to 1 ⁇ m.
- the manufacturing method according to the invention is characterized in that the temperature during the heat treatment is less than 1000 °C, preferably 900 °C or less, or 500 to 1000 °C, 600 to 1000 °C, 500 to 900 °C or 600 to 900 °C heat treatment temperature It is done.
- the heat treatment temperature exceeds 1000 ° C., the Si crystal of the core part including the silicon oxide particles tends to increase, and thus there may be a problem in that it is not possible to control volume expansion during lithium occlusion release, which is an effect of the present invention.
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Abstract
Description
방전용량(mAh/g) | 충전전용량(mAh/g) | 초기효율(%) | Normalized Capacity(%)@ 50th cycle | Expansion (1.6g/cc) | |
실시예 1 | 535 | 636 | 84.1 | 97 | 45% |
비교예 1 | 534 | 634 | 84.2 | 84 | 80% |
Claims (12)
- 프리 Si 결정의 규소산화물(SiOx) 입자를 포함하는 코어부; 및상기 코어부의 적어도 일부의 표면에 탄소물질을 포함하는 코팅층인 쉘부를 구비하는 코어-쉘 구조의 비정질 SiOx-C 복합체를 포함하는 음극 활물질.
- 제1항에 있어서,상기 규소산화물(SiOx)에서 x는 1이하(x≤1)임을 특징으로 하는 음극 활물질.
- 제1항에 있어서,상기 규소산화물(SiOx)에서 x는 1(x=1)로, 상기 규소산화물은 SiO임을 특징으로 하는 음극 활물질.
- 제1항에 있어서,상기 프리 Si 결정의 규소산화물(SiOx) 입자는 0.1 내지 30㎛의 평균 입경을 가지는 것을 특징으로 하는 음극 활물질.
- 제1항에 있어서,상기 프리 Si 결정의 규소산화물(SiOx) 입자는 0.5 내지 100m2/g의 BET 비표면적을 가지는 것을 특징으로 하는 음극 활물질.
- 제1항에 있어서,상기 쉘부의 함량은 상기 코어부 100 중량부 기준으로 1 내지 30중량부인 것을 특징으로 하는 음극 활물질.
- 제1항에 있어서,상기 쉘부는 0.01 내지 5㎛의 두께를 가지는 것을 특징으로 하는 음극 활물질.
- 집전체, 및 상기 집전체의 적어도 일면에 형성되며 음극 활물질을 포함하는 음극 활물질층을 구비한 리튬 이차전지용 음극에 있어서,상기 음극 활물질이 제1항 내지 제7항 중 어느 한 항의 음극 활물질을 포함하는 리튬 이차전지용 음극.
- 양극, 음극 및 상기 양극과 음극 사이에 개재된 세퍼레이터를 포함하는 리튬 이차전지에 있어서,상기 음극이 제8항에 따른 음극인 리튬 이차전지.
- 코어부로서 규소산화물(SiOx) 입자를 준비하는 단계; 및상기 코어부 적어도 일부의 표면에 탄소전구체를 열처리하여, 상기 코어부 적어도 일부의 표면에 탄소 코팅층인 쉘부를 형성하는 단계를 포함하고,상기 열처리시 온도는 1000℃ 미만인 것을 특징으로 하는, 코어-쉘 구조의 비정질 SiOx-C 복합체를 포함하는 음극 활물질의 제조방법.
- 제10항에 있어서,상기 열처리시 온도는 900℃이하임을 특징으로 하는 음극 활물질의 제조방법.
- 제10항에 따른 음극 활물질의 제조방법으로 제조된 것을 특징으로 하는 음극 활물질.
Priority Applications (6)
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CN201380047735.3A CN104854740A (zh) | 2012-12-06 | 2013-11-29 | 具有高容量的锂二次电池用负极活性材料、其制备和包含其的锂二次电池 |
JP2015526483A JP6152419B2 (ja) | 2012-12-06 | 2013-11-29 | リチウム二次電池用高容量負極活物質、その製造方法、及びそれを含むリチウム二次電池 |
BR112014029719A BR112014029719A2 (pt) | 2012-12-06 | 2013-11-29 | material de ânodo ativo tendo alta capacidade para bateria secundária de lítio, preparação do mesmo, e bateria secundária de lítio compreendendo o mesmo |
IN2637MUN2014 IN2014MN02637A (ko) | 2012-12-06 | 2013-11-29 | |
EP13859936.0A EP2854206A4 (en) | 2012-12-06 | 2013-11-29 | HIGH-PERFORMANCE ANODEACTIVE MATERIAL FOR A LITHIUM CYBER BATTERY, METHOD OF MANUFACTURING THEREOF, AND LITHIUM CYCLE BATTERY THEREWITH |
US14/327,692 US20140322611A1 (en) | 2012-12-06 | 2014-07-10 | Anode active material having high capacity for lithium secondary battery, preparation thereof and lithium secondary battery comprising the same |
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KR20120141076 | 2012-12-06 | ||
KR10-2012-0141076 | 2012-12-06 | ||
KR1020130147718A KR101562017B1 (ko) | 2012-12-06 | 2013-11-29 | 리튬 이차전지용 고용량 음극 활물질, 이의 제조 방법 및 이를 포함한 리튬 이차전지 |
KR10-2013-0147718 | 2013-11-29 |
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US14/327,692 Continuation US20140322611A1 (en) | 2012-12-06 | 2014-07-10 | Anode active material having high capacity for lithium secondary battery, preparation thereof and lithium secondary battery comprising the same |
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EP (1) | EP2854206A4 (ko) |
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CN (1) | CN104854740A (ko) |
BR (1) | BR112014029719A2 (ko) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2018203599A1 (ko) * | 2017-05-04 | 2018-11-08 | 주식회사 엘지화학 | 음극 활물질, 상기 음극 활물질을 포함하는 음극, 상기 음극을 포함하는 이차 전지 및 상기 음극 활물질의 제조 방법 |
CN109713242A (zh) * | 2017-10-26 | 2019-05-03 | 银隆新能源股份有限公司 | 具有核壳石榴结构的钛硅碳负极材料及其制备方法 |
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US20160156031A1 (en) * | 2014-11-28 | 2016-06-02 | Samsung Electronics Co., Ltd. | Anode active material for lithium secondary battery and lithium secondary battery including the anode active material |
WO2017026269A1 (ja) * | 2015-08-10 | 2017-02-16 | ソニー株式会社 | 二次電池用負極およびその製造方法、二次電池およびその製造方法、ならびに電池パック、電動車両、電力貯蔵システム、電動工具および電子機器 |
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- 2013-11-29 WO PCT/KR2013/011032 patent/WO2014088270A1/ko active Application Filing
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KR101562017B1 (ko) | 2015-10-20 |
EP2854206A1 (en) | 2015-04-01 |
BR112014029719A2 (pt) | 2017-06-27 |
TW201440298A (zh) | 2014-10-16 |
JP6152419B2 (ja) | 2017-06-21 |
IN2014MN02637A (ko) | 2015-10-16 |
US20140322611A1 (en) | 2014-10-30 |
KR20140073426A (ko) | 2014-06-16 |
EP2854206A4 (en) | 2016-01-27 |
JP2015530704A (ja) | 2015-10-15 |
TWI536642B (zh) | 2016-06-01 |
CN104854740A (zh) | 2015-08-19 |
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