KR20220131663A - 전고체전지용 복합전극 제조방법, 및 이에 따라 제조된 전고체전지용 복합전극 - Google Patents
전고체전지용 복합전극 제조방법, 및 이에 따라 제조된 전고체전지용 복합전극 Download PDFInfo
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Abstract
Description
도 2a는 실시예 2에 따라 제조한 전고체전지용 복합전극의 SEM 이미지이고, 도 2b는 실시예 2에 따라 제조한 전고체전지용 복합전극의 코팅층을 확대한 SEM이미지이다.
도 3a는 비교예에 따라 제조한 전고체전지용 복합전극의 SEM 이미지이고, 도 3b는 비교예에 따라 제조한 전고체전지용 복합전극의 코팅층을 확대한 SEM이미지이다.
도 4는 실시예 1 내지 4, 및 비교예에 따른 전고체전지용 복합전극로 제조한 전고체 전지의 사이클 횟수 대비 방전용량을 나타낸 그래프이다.
| 구분 | 코팅층의 영스 모듈러스(Young's modulus) (GPa |
두께 (nm) | |
| 실시예 1 | 18 | 185 | |
| 실시예 2 | 18 | 190 | |
| 실시예 3 | 20 | 192 | |
| 실시예 4 | 19 | 186 | |
| 비교예 | 25 | 230 | |
| *영스 모듈러스 : 초음파 공명을 이용한 공진법을 통해 재료의 동탄성계수를 측정 | |||
| 구분 | 초기(1st) 방전용량 (mAh/g) |
수명 (%, @ 25cycle) | |
| 실시예 1 | 152.33 | 29.53 | |
| 실시예 2 | 154.67 | 39.85 | |
| 실시예 3 | 150.75 | 27.66 | |
| 실시예 4 | 155.88 | 16.21 | |
| 비교예 | 127.46 | 11.02 | |
| * 충방전 특성 평가 : 전고체 Li 반전지를 제조하여 율속 특성을 평가 | |||
Claims (17)
- 적어도 1종 이상의 고체전해질 전구체와, 적어도 1종 이상의 극성용매를 혼합한 전구체 용액을 준비하는 단계;
상기 전구체 용액을 교반하는 단계;
상기 교반된 전구체 용액에 활물질을 투입하여 전극 슬러리를 제조하는 단계; 및
상기 전극 슬러리를 열처리하여 전고체전지용 복합전극을 얻는 단계;를 포함하고,
상기 전고체전지용 복합전극은 활물질; 및 상기 활물질 상에 위치하고, 고체전해질을 포함하는 코팅층;을 포함하는 것을 특징으로 하는, 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 전구체 용액에 포함된 고체전해질 전구체 : 극성용매의 질량비는 8~10 : 1인 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 고체전해질 전구체는 Li2S, P2S5, LiCl, LiBr, 및 LiI 로 이루어진 군으로부터 선택된 1종을 포함하는 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 극성용매는 고리형 에터(Cyclic ether), 아세토나이트릴(Acetonitrile; ACN), 에탄올(Ethanol; EtOH), 로 이루어진 군으로부터 선택된 1종을 포함하는 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 전구체 용액을 교반하는 단계에서,
상기 교반 속도는 250~280rpm인 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 전극 슬러리를 제조하는 단계에서,
상기 전극슬러리에 포함되는 고체전해질 전구체 : 활물질의 질량비는 1 : 8~10인 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 고체전해질 전구체와 다른 추가 고체전해질 전구체를 포함하는 추가 전구체 용액을 준비하는 단계를 더 포함하는 것인 전고체전지용 복합전극 제조방법. - 제7항에 있어서,
상기 전극 슬러리를 제조하는 단계는,
상기 교반된 전구체 용액에 활물질을 투입하여 혼합물을 제조하는 단계; 및
상기 혼합물에 추가 전구체 용액을 투입하는 단계를 포함하는 것인 전고체전지용 복합전극 제조방법. - 제8항에 있어서,
상기 전극 슬러리에 포함되는, 고체전해질 전구체와 추가 고체전해질 전구체 : 활물질의 질량비는 1 : 8~10인 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 전극 슬러리를 제조하는 단계에서,
전극 슬러리 전체 100중량% 기준, 도전재를 0.1~0.5중량%의 함량으로 더 투입하는 것인 전고체전지용 복합전극 제조방법. - 제1항에 있어서,
상기 열처리는 140~160℃의 온도에서 1~3시간 동안 수행되는 것인 전고체전지용 복합전극 제조방법. - 활물질; 및 상기 활물질 상에 위치하고, 고체전해질을 포함하는 코팅층;을 포함하고,
상기 코팅층은 비정질 고체전해질을 포함하는 것을 특징으로 하는전고체전지용 복합전극. - 제12항에 있어서,
상기 고체전해질은 PS4 3- 을 포함하는 것인 전고체전지용 복합전극. - 제12항에 있어서,
상기 고체전해질은 Li3PS4, Li6PS5Cl, Li6PS5ClBr, 및 Li6PS5Br로 이루어진 군으로부터 선택된 1종 이상을 포함하는 것인 전고체전지용 복합전극.
- 제12항에 있어서,
상기 비정질 고체전해질의 함량은, 상기 코팅층 전체 100중량% 기준, 비정질 고체전해질 20~80중량%로 포함하는 것인 전고체전지용 복합전극. - 제12항에 있어서,
상기 코팅층의 두께는 200nm 이하인 것인 전고체전지용 복합전극. - 제12항에 있어서,
상기 코팅층의 영스 모듈러스(Young's modulus)는 18~30 GPa인 것인 전고체전지용 복합전극.
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| KR1020210036595A KR20220131663A (ko) | 2021-03-22 | 2021-03-22 | 전고체전지용 복합전극 제조방법, 및 이에 따라 제조된 전고체전지용 복합전극 |
| US17/407,844 US11876219B2 (en) | 2021-03-22 | 2021-08-20 | Method of manufacturing composite electrode for all-solid-state battery, and composite electrode for all-solid-state battery manufactured thereby |
| CN202111060617.9A CN115117290A (zh) | 2021-03-22 | 2021-09-10 | 制造用于全固态电池的复合电极的方法以及复合电极 |
| US18/523,329 US12401023B2 (en) | 2021-03-22 | 2023-11-29 | Method of manufacturing composite electrode for all-solid-state battery, and composite electrode for all-solid-state battery manufactured thereby |
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| KR102090285B1 (ko) | 2016-12-22 | 2020-03-17 | 울산과학기술원 | 전고체전지의 전극, 이의 제조 방법, 및 이를 포함하는 전고체전지 |
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| US20150093652A1 (en) | 2013-10-02 | 2015-04-02 | Samsung Electronics Co., Ltd. | Sulfide solid electrolyte, method of preparing the same, and solid state battery including the same |
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| KR102090285B1 (ko) | 2016-12-22 | 2020-03-17 | 울산과학기술원 | 전고체전지의 전극, 이의 제조 방법, 및 이를 포함하는 전고체전지 |
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| CN115117290A (zh) | 2022-09-27 |
| US12401023B2 (en) | 2025-08-26 |
| US20220302441A1 (en) | 2022-09-22 |
| US20240097119A1 (en) | 2024-03-21 |
| US11876219B2 (en) | 2024-01-16 |
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