WO2022205165A1 - 一种隔离膜及包含所述隔离膜的电化学装置和电子装置 - Google Patents
一种隔离膜及包含所述隔离膜的电化学装置和电子装置 Download PDFInfo
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- WO2022205165A1 WO2022205165A1 PCT/CN2021/084667 CN2021084667W WO2022205165A1 WO 2022205165 A1 WO2022205165 A1 WO 2022205165A1 CN 2021084667 W CN2021084667 W CN 2021084667W WO 2022205165 A1 WO2022205165 A1 WO 2022205165A1
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Abstract
Description
Claims (21)
- 一种隔离膜,包括基材和设置于所述基材至少一个表面上的第一涂层,其中,所述第一涂层包含第一聚合物,在所述第一涂层表面的任意250μm×200μm区域内,所述第一聚合物颗粒最大长度处于10μm至30μm之间的颗粒数量在10个至30个。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜的透气值P为500sec/100mL至10000sec/100mL。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜的第一涂层涂布面密度W1为0.4g/m 2至2g/m 2。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜的孔隙率K为30%至65%。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜还包括耐热层,所述耐热层设置在所述基材和所述第一涂层之间,所述耐热层包括无机粒子,所述无机粒子粒径Dv50为0.5μm至35μm。
- 根据权利要求5所述的隔离膜,其中,所述无机粒子包括勃姆石、氢氧化镁、氧化铝、二氧化钛、二氧化硅、二氧化锆、二氧化锡、氧化镁、氧化锌、硫酸钡、氮化硼或氮化铝中的至少一种。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜的透气值P与所述第一涂层面密度W1满足如下关系:P/W1=500至6500。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜的孔隙率K与所述第一涂层面密度W1满足如下关系:K/W1=0.15至1.4。
- 根据权利要求1所述的隔离膜,其中,所述第一涂层还包括第一辅助粘结剂,所述第一辅助粘结剂包括丙烯酸乙酯、丙烯酸丁酯、甲基丙烯酸乙酯、苯乙烯、氯苯乙烯、氟苯乙烯、甲基苯乙烯、丙烯酸、甲基丙烯酸、马来酸、丙烯腈和丁二烯的均聚物或共聚物中的至少一种,第一聚合物与第一辅助粘结剂质量比为2.5至18。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜还包括第二涂层,所述第一涂层和所述第二涂层分别设置在隔离膜的两侧,所述第二涂层包括第二聚合物和第二辅助粘结剂,第二聚合物与第二辅助粘结剂质量比为5至20。
- 根据权利要求9所述的隔离膜,其中,所述第一涂层设置面对正极时的粘接强度4N/m至20N/m。
- 根据权利要求10所述的隔离膜,其中,所述第二涂层设置面对负极时的粘接强度 4N/m至20N/m。
- 根据权利要求9所述的隔离膜,其中,基于所述第一涂层的总质量,所述第一聚合物的质量百分含量为85%至95%,所述第一辅助粘结剂的质量百分含量为5%至15%。
- 根据权利要求1所述的隔离膜,其中,所述第一聚合物的软化点为90℃至150℃,所述第一聚合物的Dv50为3μm至16μm。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜的第二涂层涂布面密度W2为0.1g/m 2至1g/m 2。
- 根据权利要求10所述的隔离膜,其中,基于所述第二涂层的总质量,所述第二聚合物的质量百分含量为88%至92.5%,所述第二辅助粘结剂的质量百分含量为7.5%至12%。
- 根据权利要求1所述的隔离膜,其中,所述第一聚合物包括偏氟乙烯、偏氟乙烯、六氟丙烯、乙烯、丙烯、氯乙烯、氯丙烯、丙烯酸、丙烯酸酯、苯乙烯、丁二烯和丙烯腈的均聚物或共聚物中的至少一种。
- 根据权利要求10所述的隔离膜,其中,所述第二聚合物包括丙烯酸乙酯、丙烯酸丁酯、甲基丙烯酸乙酯、苯乙烯、氯苯乙烯、氟苯乙烯、甲基苯乙烯、丙烯酸、甲基丙烯酸、马来酸、丙烯腈和丁二烯的均聚物或共聚物中的至少一种,所述第二聚合物的Dv50为0.2μm至8μm;所述第二辅助粘结剂包括羧甲基纤维素钠或二甲基硅氧烷中的至少一种。
- 根据权利要求1所述的隔离膜,其中,所述隔离膜满足以下特征中的至少一种:a)在所述第一涂层表面的任意250μm×200μm区域内,所述第一聚合物颗粒最大长度处于10μm至30μm之间的颗粒数量在20个至30个;b)所述隔离膜的第一涂层涂布面密度W1为0.4g/m 2至1g/m 2;c)所述隔离膜的透气值P为1000sec/100mL至5000sec/100mL;d)所述隔离膜还包括耐热层,所述耐热层设置在所述基材和所述第一涂层之间,所述耐热层包括无机粒子,所述无机粒子粒径Dv50为5μm至35μm。
- 一种电化学装置,包括权利要求1-19中任一项所述的隔离膜。
- 一种电子装置,包含权利要求20所述的电化学装置。
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PCT/CN2021/084667 WO2022205165A1 (zh) | 2021-03-31 | 2021-03-31 | 一种隔离膜及包含所述隔离膜的电化学装置和电子装置 |
CN202180004513.8A CN114144932B (zh) | 2021-03-31 | 2021-03-31 | 一种隔离膜及包含所述隔离膜的电化学装置和电子装置 |
BR112023019627A BR112023019627A2 (pt) | 2021-03-31 | 2021-03-31 | Separador, aparelho eletroquímico e dispositivo eletrônico |
EP21933830.8A EP4318777A1 (en) | 2021-03-31 | 2021-03-31 | Separator, and electrochemical device and electronic device comprising same |
KR1020237031941A KR20230141889A (ko) | 2021-03-31 | 2021-03-31 | 분리막 및 상기 분리막을 포함하는 전기화학 디바이스 및 전자 디바이스 |
JP2023558865A JP2024511464A (ja) | 2021-03-31 | 2021-03-31 | セパレータならびに前記セパレータを含む電気化学装置および電子装置 |
US18/476,840 US20240079727A1 (en) | 2021-03-31 | 2023-09-28 | Separator, electrochemical apparatus comprising the same, and electronic device |
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CN117458084A (zh) * | 2023-12-19 | 2024-01-26 | 宁德新能源科技有限公司 | 一种二次电池和电子装置 |
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CN115347320A (zh) * | 2022-08-08 | 2022-11-15 | 珠海冠宇电池股份有限公司 | 一种隔膜及包括该隔膜的电池 |
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KR20160118979A (ko) * | 2015-04-02 | 2016-10-12 | 주식회사 엘지화학 | 리튬 이차전지용 세퍼레이터 및 그의 제조방법 |
CN111492507A (zh) * | 2017-10-30 | 2020-08-04 | 阿科玛股份有限公司 | 锂离子电池隔膜 |
CN108305977A (zh) * | 2018-02-07 | 2018-07-20 | 沧州明珠塑料股份有限公司 | 一种粘结性聚合物涂覆锂离子电池隔膜及其制备方法 |
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CN117458084A (zh) * | 2023-12-19 | 2024-01-26 | 宁德新能源科技有限公司 | 一种二次电池和电子装置 |
CN117458084B (zh) * | 2023-12-19 | 2024-03-19 | 宁德新能源科技有限公司 | 一种二次电池和电子装置 |
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EP4318777A1 (en) | 2024-02-07 |
BR112023019627A2 (pt) | 2023-11-14 |
CN114144932A (zh) | 2022-03-04 |
JP2024511464A (ja) | 2024-03-13 |
US20240079727A1 (en) | 2024-03-07 |
CN114144932B (zh) | 2024-04-05 |
KR20230141889A (ko) | 2023-10-10 |
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