KR20090008870A - 올리빈계 양극활물질을 사용한 양극 및 상기 양극을포함하는 이차전지 - Google Patents
올리빈계 양극활물질을 사용한 양극 및 상기 양극을포함하는 이차전지 Download PDFInfo
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Abstract
Description
비교예 1 | 실시예 1 | |||
교류저항 | 직류저항 | 교류저항 | 직류저항 | |
1 | 51.7 | 83.4 | 48.5 | 82.4 |
2 | 50.8 | 83.3 | 48.9 | 81.1 |
보존용량(%) | 회복용량(%) | |
비교예 1 | 86.2 % | 91.3 % |
비교예 2 | 83.5 % | 89.1 % |
실시예 1 | 87.6 % | 94.5 % |
실시예 2 | 87.5 % | 94.8 % |
0 주 | 1 주 | 2 주 | 3 주 | 4 주 | ||||||
OCV | IR | OCV | IR | OCV | IR | OCV | IR | OCV | IR | |
비교예1 | 4.17 | 49.0 | 4.13 | 52.0 | 4.12 | 53.3 | 4.11 | 54.2 | 4.11 | 55.1 |
비교예2 | 4.17 | 51.2 | 4.13 | 54.7 | 4.12 | 55.7 | 4.11 | 56.3 | 4.10 | 56.9 |
실시예1 | 4.16 | 49.6 | 4.13 | 52.2 | 4.13 | 53.1 | 4.13 | 53.8 | 4.10 | 54.0 |
실시예2 | 4.16 | 50.4 | 4.13 | 52.6 | 4.13 | 53.9 | 4.13 | 54.3 | 4.10 | 54.7 |
Claims (13)
- 양극, 음극 및 세퍼레이터를 구비하여 이루어진 전극조립체, 상기 전극조립체를 내장하는 케이스를 포함하며,상기 양극은 코발트(Co)를 포함하는 양극활물질층을 가지고,상기 양극활물질층은 적어도 일부 표면에 올리빈계 양극활물질층이 적층되는 것을 특징으로 하는 이차전지.
- 제 1항에 있어서, 상기 양극활물질은 LiCoO2 또는 LiNi1 -x- yCoMyO2(0≤x≤1, 0≤y≤1, 0≤x+y≤1, M은 Al, Sr, Mg 또는 La 등의 금속)인 것을 특징으로 하는 이차전지.
- 제 1항에 있어서, 상기 올리빈계 양극활물질은 LiMPO4 (M은 Fe, Mn, Ni 또는 V)인 것을 특징으로 하는 이차전지.
- 제 1항에 있어서, 상기 올리빈계 양극활물질층의 두께는 1 ~ 10 ㎛인 것을 특징으로 하는 이차전지.
- 제 1항에 있어서, 상기 음극은 그래파이트계 음극활물질층을 가지는 것을 특 징으로 하는 이차전지.
- 제 5항에 있어서, 상기 음극활물질층 상부에 세라믹층이 적층되는 것을 특징으로 하는 이차전지.
- 제 6항에 있어서, 상기 세라믹층은 알루미나, 실리카, 지르코니아, 제올라이트, 마그네시아, 산화티탄, 바륨티탄 중에서 적어도 어느 하나 선택되는 것을 특징으로 하는 이차전지.
- 제 6항에 있어서, 상기 세라믹층의 두께는 2 ~ 20 ㎛인 것을 특징으로 하는 이차전지.
- 양극, 음극 및 세퍼레이터를 구비하여 이루어진 전극조립체, 상기 전극조립체를 내장하는 케이스를 포함하며,상기 양극은 코발트(Co)를 포함하는 양극활물질과 올리빈계 양극활물질을 혼합하여 50 ~ 100 ㎛의 두께로 코팅되는 것을 특징으로 하는 이차전지.
- 제 9항에 있어서, 상기 양극활물질은 LiCoO2인 것을 특징으로 하는 이차전지.
- 제 9항에 있어서, 상기 올리빈계 양극활물질은 LiMPO4 (M은 Fe, Mn, Ni 또는 V)인 것을 특징으로 하는 이차전지.
- 제 9항에 있어서, 상기 올리빈계 양극활물질은 양극활물질에 대해 1 ~ 5 중량%인 것을 특징으로 하는 이차전지.
- 제 9항에 있어서, 상기 음극은 그래파이트계 음극활물질층을 포함하는 것을 특징으로 하는 이차전지.
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Cited By (10)
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WO2011025080A1 (ko) * | 2009-08-28 | 2011-03-03 | 대정이엠 주식회사 | 리튬 이차전지용 양극 활물질 및 그 제조방법과 이를 포함하는 리튬 이차전지 |
US20120045694A1 (en) * | 2010-08-19 | 2012-02-23 | Samsung Electronics Co., Ltd. | Cathode, method of preparing the same, and lithium battery including the cathode |
US8734993B2 (en) | 2012-03-12 | 2014-05-27 | Samsung Sdi Co., Ltd. | Electrode assembly and lithium rechargeable battery comprising the same |
US8808916B2 (en) | 2009-08-28 | 2014-08-19 | Daejung Em Co., Ltd. | Cathode active material for lithium secondary batteries, method for preparing the same, and lithium secondary batteries comprising the same |
US8932481B2 (en) | 2010-08-31 | 2015-01-13 | Samsung Sdi Co., Ltd. | Cathode active material, method of preparing the same, and cathode and lithium battery including the cathode active material |
CN106663781A (zh) * | 2014-07-10 | 2017-05-10 | 丰田自动车株式会社 | 非水二次电池 |
US9859555B2 (en) | 2014-02-07 | 2018-01-02 | Samsung Sdi Co., Ltd. | Positive active material, positive electrode, lithium battery including the same, and method of manufacturing thereof |
KR20180004679A (ko) * | 2016-07-04 | 2018-01-12 | 주식회사 엘지화학 | 양극 및 상기 양극을 포함하는 이차 전지 |
WO2018084526A3 (ko) * | 2016-11-04 | 2018-11-01 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 양극 및 이를 포함하는 리튬 이차 전지 |
US11114658B2 (en) * | 2018-02-19 | 2021-09-07 | Samsung Sdi Co., Ltd. | Positive active material for rechargeable lithium battery, positive electrode including same and rechargeable lithium battery including same |
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KR20070009447A (ko) * | 2005-07-14 | 2007-01-18 | 마츠시타 덴끼 산교 가부시키가이샤 | 리튬 2차 전지용 양극 및 이를 이용한 리튬 2차 전지 |
JP5051988B2 (ja) * | 2005-07-29 | 2012-10-17 | 三洋電機株式会社 | 電極の製造方法、その製造方法に用いる電極の製造装置、及び当該電極の製造方法により製造された電極を用いた電池 |
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US8808916B2 (en) | 2009-08-28 | 2014-08-19 | Daejung Em Co., Ltd. | Cathode active material for lithium secondary batteries, method for preparing the same, and lithium secondary batteries comprising the same |
US20120045694A1 (en) * | 2010-08-19 | 2012-02-23 | Samsung Electronics Co., Ltd. | Cathode, method of preparing the same, and lithium battery including the cathode |
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US9859555B2 (en) | 2014-02-07 | 2018-01-02 | Samsung Sdi Co., Ltd. | Positive active material, positive electrode, lithium battery including the same, and method of manufacturing thereof |
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