JP6152419B2 - 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 - Google Patents
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 Download PDFInfo
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Description
望ましくは、前記シェル部の含量は前記コア部100重量部を基準に1〜30重量部であり得、また、前記シェル部は0.01〜5μmの厚さを有し得る。
また、本発明は、前記負極活物質の製造方法によって製造された負極活物質を提供する。
より望ましくは、前記熱処理の温度は900℃以下であり、前記温度で熱処理すればSi結晶を更に制御することができる。
ケイ素酸化物粒子を含むコア部を用意し、少なくとも一部の表面にシェル部をコーティングして本発明による非晶質SiOx‐C複合体を製造する。
選択的に、本発明で使用される電解液は、通常の電解液に含まれる過充電防止剤などのような添加剤を更に含むことができる。
中間粒径が5μmであるSiO 10gを回転管状炉に投入し、アルゴンガス
を0.5L/分で流した後、5℃/分の速度で800℃まで温度を上温させた。回転管状炉を10rpm/分の速度で回転させると共に、アルゴンガスを1.8L/分、アセチレンガスを0.3L/分で流し、かつ、3時間熱処理して導電性炭素コーティング層が形成されたケイ素系負極活物質を製造した。該導電性炭素コーティング層の炭素含量は、前記コア部100重量部を基準に5.3重量部であった。また、シェル部の厚さはTEM分析によって40nmであることが観察された。
前記熱処理温度を1050℃にしたことを除き、実施例1と同一方法で炭素コーティングを行った。
黒鉛とSiO/Cとを重量比85/15で混合した粉末を負極活物質として使用し、導電材としてカーボンブラックを使用した。それらをCMC及びSBRを利用して組成比95/1/2/2で負極スラリーを製造した。前記負極スラリーをコーティングした後、130℃で8時間乾燥し、電極密度が1.6g/ccになるように圧延した後、打ち抜いて負極として使用した。
正極としてリチウム金属を使用し、前記製造された負極と正極との間にポリオレフィンセパレータを介在させて電極組立体を製造した。
フルオロエチレンカーボネート(FEC)、エチレンカーボネート(EC)、及びジエチルカーボネート(DEC)を10:20:70の体積比で混合し、1MのLiPF6を添加して非水電解液を用意し、前記製造された電極組立体に注入してコイン型半電池を製造した。
X線回折分析は、X線源としてCuKαを利用して管電圧40kV、管電流40mAにし、測定は10〜90゜の2θ/θ、0/02゜のステップ、及び走査速度0.6゜/minの条件で行った。実施例1及び比較例1による負極活物質のX線回折曲線は図1の通りである。
実施例1及び比較例1の負極活物質を使用して製造された前記製造例1のコイン電池に対して、下記の条件における最初の充放電特性及び寿命特性を測定し、その結果を下記の表1及び図1に示した。
<コイン型半電池の充放電条件>
‐電池の充電:5Vまで定電流で充電した後、5Vで電流が0.005Cに到達するまで定電圧で充電した。
‐電池の放電:1.0Vまで定電流で放電を行った。(但し、最初の充放電時には放電を1.5Vまで行った。)
Claims (2)
- コア‐シェル構造の非晶質SiOx‐C複合体を備えた負極活物質の製造方法であって、
前記コア‐シェル構造の非晶質SiOx‐C複合体が、フリーSi結晶のケイ素酸化物(SiOx)粒子を含むコア部と、及び、前記コア部の少なくとも一部の表面に、炭素物質を含むコーティング層であるシェル部とを備えてなるものであり、
コア部としてケイ素酸化物(SiOx)粒子を用意する段階と、並びに、
常圧下の回転管状炉で、前記コア部の少なくとも一部の表面に、炭素含有気体又は炭素前駆体の気化物で化学蒸着し、及び、1000℃未満の温度で熱処理し、前記コア部の少なくとも一部の表面に0.01〜5μmの厚さを有する炭素コーティング層であるシェル部を形成する段階とを含んでなることを特徴とする、コア‐シェル構造の非晶質SiOx‐C複合体を含む負極活物質の製造方法。 - 前記熱処理の温度が、900℃以下であることを特徴とする、請求項1に記載の負極活物質の製造方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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KR20120141076 | 2012-12-06 | ||
KR10-2012-0141076 | 2012-12-06 | ||
KR10-2013-0147718 | 2013-11-29 | ||
KR1020130147718A KR101562017B1 (ko) | 2012-12-06 | 2013-11-29 | 리튬 이차전지용 고용량 음극 활물질, 이의 제조 방법 및 이를 포함한 리튬 이차전지 |
PCT/KR2013/011032 WO2014088270A1 (ko) | 2012-12-06 | 2013-11-29 | 리튬 이차전지용 고용량 음극 활물질, 이의 제조 방법 및 이를 포함한 리튬 이차전지 |
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JP2015530704A JP2015530704A (ja) | 2015-10-15 |
JP6152419B2 true JP6152419B2 (ja) | 2017-06-21 |
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US (1) | US20140322611A1 (ja) |
EP (1) | EP2854206A4 (ja) |
JP (1) | JP6152419B2 (ja) |
KR (1) | KR101562017B1 (ja) |
CN (1) | CN104854740A (ja) |
BR (1) | BR112014029719A2 (ja) |
IN (1) | IN2014MN02637A (ja) |
TW (1) | TWI536642B (ja) |
WO (1) | WO2014088270A1 (ja) |
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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 |
US11088359B2 (en) * | 2015-08-10 | 2021-08-10 | Murata Manufacturing Co., Ltd. | Secondary battery-use anode and method of manufacturing the same, secondary battery and method of manufacturing the same, battery pack, electric vehicle, electric power storage system, electric power tool, and electronic apparatus |
HUE062435T2 (hu) * | 2016-06-02 | 2023-11-28 | Lg Energy Solution Ltd | Katód aktív anyag, az ezt tartalmazó katód, valamint az ezt tartalmazó lítium szekunder akkumulátor |
CN106252622B (zh) * | 2016-08-23 | 2019-07-26 | 深圳市贝特瑞新能源材料股份有限公司 | 一种氧化硅/碳复合纳米线负极材料、制备方法及锂离子电池 |
CN106531997A (zh) * | 2016-11-17 | 2017-03-22 | 刘峰岭 | 一种钛酸锂复合负极材料的制备方法 |
RU2634561C1 (ru) * | 2016-12-15 | 2017-10-31 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Способ получения нанокомпозиционных порошковых анодных материалов для литий-ионных аккумуляторов |
EP3367483A1 (de) * | 2017-02-23 | 2018-08-29 | Alevo International, S.A. | Wiederaufladbare batteriezelle mit einem separator |
KR101981242B1 (ko) * | 2017-04-14 | 2019-05-22 | 백창근 | 구리 도핑된 탄소-실리콘 산화물(C-SiOx) 복합체 및 이의 제조 방법 |
KR102164252B1 (ko) | 2017-05-04 | 2020-10-12 | 주식회사 엘지화학 | 음극 활물질, 상기 음극 활물질을 포함하는 음극, 상기 음극을 포함하는 이차 전지 및 상기 음극 활물질의 제조 방법 |
JP7046732B2 (ja) * | 2017-06-27 | 2022-04-04 | 三洋化成工業株式会社 | リチウムイオン電池用被覆活物質及びリチウムイオン電池用負極 |
WO2019024221A1 (zh) * | 2017-07-31 | 2019-02-07 | 中天储能科技有限公司 | 一种高首效长寿命的硅碳负极材料制备方法 |
CN109713242B (zh) * | 2017-10-26 | 2022-02-18 | 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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KR20210130558A (ko) * | 2020-04-22 | 2021-11-01 | 주식회사 엘지에너지솔루션 | 실리콘-탄소 복합 음극 활물질, 상기 실리콘-탄소 복합 음극 활물질을 포함하는 음극, 및 상기 음극을 포함하는 이차 전지 |
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CN112054180B (zh) * | 2020-08-24 | 2022-02-18 | 湖南宸宇富基新能源科技有限公司 | 一种低含氧多孔硅复合粉体材料及其制备和应用 |
CN112331838B (zh) * | 2020-12-01 | 2022-02-08 | 郑州中科新兴产业技术研究院 | 一种锂离子电池高容量氧化亚硅复合负极材料及其制备方法 |
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JP4752992B2 (ja) * | 2001-06-15 | 2011-08-17 | 信越化学工業株式会社 | 非水電解質二次電池用負極材 |
JP3952180B2 (ja) | 2002-05-17 | 2007-08-01 | 信越化学工業株式会社 | 導電性珪素複合体及びその製造方法並びに非水電解質二次電池用負極材 |
TWI278429B (en) * | 2002-05-17 | 2007-04-11 | Shinetsu Chemical Co | Conductive silicon composite, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell |
JP3971311B2 (ja) * | 2003-01-06 | 2007-09-05 | 三星エスディアイ株式会社 | リチウム二次電池用負極活物質及びリチウム二次電池 |
JP4519592B2 (ja) * | 2004-09-24 | 2010-08-04 | 株式会社東芝 | 非水電解質二次電池用負極活物質及び非水電解質二次電池 |
KR101406013B1 (ko) * | 2008-03-17 | 2014-06-11 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 비수 전해질 2차 전지용 부극재 및 그것의 제조 방법, 및 비수 전해질 2차 전지용 부극 및 비수 전해질 2차 전지 |
JP2011076788A (ja) * | 2009-09-29 | 2011-04-14 | Shin-Etsu Chemical Co Ltd | 非水電解質二次電池用負極材の製造方法並びにリチウムイオン二次電池及び電気化学キャパシタ |
CN103081188B (zh) * | 2010-08-25 | 2015-09-23 | 株式会社大阪钛技术 | 锂离子二次电池负极材料用粉末、使用该负极材料用粉末的锂离子二次电池负极和电容器负极、及锂离子二次电池和电容器 |
WO2012077268A1 (ja) * | 2010-12-07 | 2012-06-14 | 株式会社大阪チタニウムテクノロジーズ | リチウムイオン二次電池負極材用粉末、これを用いたリチウムイオン二次電池負極およびキャパシタ負極、ならびにリチウムイオン二次電池およびキャパシタ |
JP6010279B2 (ja) * | 2011-04-08 | 2016-10-19 | 信越化学工業株式会社 | 非水電解質二次電池用負極活物質の製造方法 |
KR101201807B1 (ko) * | 2011-08-31 | 2012-11-15 | 삼성에스디아이 주식회사 | 리튬 이차 전지 |
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US20140322611A1 (en) | 2014-10-30 |
TWI536642B (zh) | 2016-06-01 |
KR101562017B1 (ko) | 2015-10-20 |
BR112014029719A2 (pt) | 2017-06-27 |
KR20140073426A (ko) | 2014-06-16 |
EP2854206A4 (en) | 2016-01-27 |
JP2015530704A (ja) | 2015-10-15 |
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