CN114032703B - 一种高润湿型无纺布锂电池隔膜及其制备方法 - Google Patents

一种高润湿型无纺布锂电池隔膜及其制备方法 Download PDF

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CN114032703B
CN114032703B CN202111314510.2A CN202111314510A CN114032703B CN 114032703 B CN114032703 B CN 114032703B CN 202111314510 A CN202111314510 A CN 202111314510A CN 114032703 B CN114032703 B CN 114032703B
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李梦佳
张立斌
陈朝晖
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Jiangsu Housheng New Energy Technology Co Ltd
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Abstract

本发明公开了一种高润湿型无纺布锂电池隔膜及其制备方法。本发明主要采用改性聚烯烃纤维与纤维素纤维混合,加入粘结剂、分散剂搅拌形成混合浆液,混合浆液经抄纸机、热压处理,形成锂电池隔膜。其中改性聚烯烃纤维是由聚烯烃纤维经酸氧化后,在过氧化物和高温条件,交联接枝亲水性强的乙二胺基乙磺酸钠分子;最后再与辛醇作用,在分子中引入烷基链。纤维素纤维是由质量比为1:0.5~2棉纤维与木质素纤维混合形成。经发明处理后的纤维表面具有丰富的官能团,同时具有亲水的基团和亲油的基团,提高了锂电池隔膜的润湿性,聚烯烃纤维和纤维素纤维混合抄造,提高了锂电池隔膜的机械强度和热稳定性。

Description

一种高润湿型无纺布锂电池隔膜及其制备方法
技术领域
本发明涉及锂电池隔膜技术领域,具体为一种高润湿型无纺布锂电池隔膜及其制备方法。
背景技术
随着化石能源的减少和可再生能源的发展,能源存储和转换设备的发展备受关注。锂离子电池由于其重量轻、较长的循环使用寿命以及安全性能,使得锂离子电池成为新能源材料的研究重点。随着锂离子电池的发展,隔膜材料的需求量日益增长。隔膜在电池中起到隔绝正负极阻止内部短路、提供锂离子通道的作用。聚烯烃隔膜由于具有良好的化学稳定性以及机械强度被广泛的应用于隔膜行业中。然而,聚烯烃材料本身具有疏水性,与电解液浸润性差。
发明内容
本发明的目的在于提供一种高润湿型无纺布锂电池隔膜及其制备方法,以解决上述背景技术中提出的问题。
为了解决上述技术问题,本发明提供如下技术方案:一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温反应,过滤,去离子水洗涤,恒温干燥;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌反应,过滤,洗涤,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温静置,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,制得高润湿型无纺布锂电池隔膜成品。
进一步的,隔膜的制备方法包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:200~600,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.0~7.5,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温至130~135℃,反应3~4h,过滤,去离子水洗涤,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温至50~60℃,静置30~40min,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置10~20min,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解1~2h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为40~60℃,制得高润湿型无纺布锂电池隔膜成品。
进一步的,所述步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3~10mm。
进一步的,步骤(1)中超声搅拌的时间为0.5~2h。
进一步的,步骤(2)中的干燥温度为50~60℃,干燥时间为3~6h。
进一步的,步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:0.5~2。
进一步的,步骤(3)中分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种。
进一步的,步骤(3)中粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种。
进一步的,步骤(3)中聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2000~3000:2~4:1~5。
如以上制备方法制备得到的高润湿型无纺布锂电池隔膜。
与现有技术相比,本发明所达到的有益效果是:
本发明首先对聚烯烃纤维进行硫酸氧化处理,氧化处理为纤维表面含氧官能团暴露,提高了纤维亲水性和反应活性;在过氧化二异丙苯作用下,聚烯烃分子热分解生成更多活泼的游离基,是聚烯烃表面碳链上生成更多的反应活性点,从而将乙二胺基乙磺酸钠分子接枝到聚烯烃分子链上,大幅度改善聚烯烃纤维的亲水性、耐热性和与其他组分的相容性。
接枝处理后的聚烯烃与辛醇作用,在聚烯烃分子上引入烷基链,从而提高聚烯烃纤维的亲油性。通过改性使其表面具有丰富的官能团,同时具有亲水的基团和亲油的基团,有利于提高隔膜润湿性,便于后续涂覆无机涂层或者PVDF涂层。
使用聚烯烃纤维与纤维素纤维混合制备隔膜,纤维素纤维预先经酸蚀处理,纤维表面粗糙度变大,具有大量的孔隙,再加入聚甲基丙烯酸酯微球、硅烷偶联剂混合形成分子网络结构,增强纤维素纤维的机械强度和耐热性能;由于纤维素表面粗糙度的存在,加之与聚烯烃纤维交织混合时形成的大量孔隙,一方面可提高隔膜表面的浸润性,另一方面为离子传输提供通道,提高隔膜的电导率。
具体实施方式
下面对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:200,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.2,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温至130℃,反应3h,过滤,去离子水洗涤,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温至50℃,静置30min,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置10min,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解1h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为40℃,制得高润湿型无纺布锂电池隔膜成品。
其中,步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3mm;超声搅拌的时间为0.5h。
步骤(2)中的干燥温度为50℃,干燥时间为3h。
步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:0.5;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2000:2:1。
实施例2
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:400,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.2,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温至132℃,反应3.5h,过滤,去离子水洗涤,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温至54℃,静置35min,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置14min,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解1.5h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为53℃,制得高润湿型无纺布锂电池隔膜成品。
其中,步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3~10mm;超声搅拌的时间为1h。
步骤(2)中的干燥温度为55℃,干燥时间为4h。
步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:1;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2700:3:3。
实施例3
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:600,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.2,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温至135℃,反应4h,过滤,去离子水洗涤,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温至60℃,静置40min,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置20min,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解2h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为60℃,制得高润湿型无纺布锂电池隔膜成品。
其中,步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为10mm;超声搅拌的时间为2h。
步骤(2)中的干燥温度为60℃,干燥时间为6h。
步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:2;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:3000:4:5。
对比例1
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:400,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.2,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温至54℃,静置35min,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置14min,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解1.5h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为53℃,制得高润湿型无纺布锂电池隔膜成品。
其中,步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3~10mm;超声搅拌的时间为1h。
步骤(2)中的干燥温度为55℃,干燥时间为4h。
步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:1;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2700:3:3。
对比例2
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:400,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.2,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温至132℃,反应3.5h,过滤,去离子水洗涤,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维与步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解1.5h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为53℃,制得高润湿型无纺布锂电池隔膜成品。
其中,步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3~10mm;超声搅拌的时间为1h。
步骤(2)中的干燥温度为55℃,干燥时间为4h。
步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:1;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2700:3:3。
对比例3
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:400,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.2,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维与步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂中,疏解1.5h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为53℃,制得高润湿型无纺布锂电池隔膜成品。
其中,步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3~10mm;超声搅拌的时间为1h。
步骤(2)中的干燥温度为55℃,干燥时间为4h。
步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:1;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2700:3:3。
对比例4
一种高润湿型无纺布锂电池隔膜的制备方法,包括以下步骤:
取纤维素纤维与聚烯烃纤维混合;再向其中加入分散剂中,疏解1.5h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为53℃,制得高润湿型无纺布锂电池隔膜成品。
其中,纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:1;分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种;粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种;聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2700:3:3。
试验结果与分析
为验证本发明的技术效果,取实施例1-3、对比例1-4制备得到的隔膜,对各组隔膜的性能进行测试,采用隔膜的吸液率来表征隔膜润湿性大小。
测试方法如下:(1)每组截取5cm*5cm的锂电池隔膜样品;(2)测量锂电池隔膜样品体积V0;(3)将盛有电解液的容器放到电子天平上,读数归0,用细线固定一圆环,待圆环完全浸入悬吊在电解液中后,记录天平读数为M0;(4)将锂电池隔膜试样固定到圆环上,重复步骤(3),60min后,记录天平读数为M1;(5)代入吸液率的公式L=(ρV0+M0-M1)/V1计算出吸液率L。各组隔膜吸液率测试和计算结果如下表:
实施例1 实施例2 实施例3 对比例1 对比例2 对比例3 对比例4
吸液率 590% 610% 600% 560% 550% 500% 300%
由以上测试结果可知,本方案制备得到的隔膜吸液率可高达590%及以上,隔膜的润湿性效果优;对比例1与实施例2相比在制备改性聚烯烃纤维时,未接枝乙二胺基乙磺酸钠,亲水基团减少;对比例2与实施例2相比,纤维素纤维未经任何处理,导致纤维表面未形成带有孔隙的粗糙结构;最终对比例1-2制备得到的隔膜吸液率均下降,隔膜润湿性变差。对比例3与实施例2相比在制备改性聚烯烃纤维时未接枝乙二胺基乙磺酸钠,纤维素纤维也未经任何处理,其制备得到的隔膜吸液率与实施例2有大幅度的下降,润湿性变差。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (10)

1.一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温反应,过滤,去离子水洗涤,恒温干燥;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌反应,过滤,洗涤,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温静置,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂,疏解,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,制得高润湿型无纺布锂电池隔膜成品。
2.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:包括以下步骤:
(1)将聚烯烃纤维放入硫酸溶液中,质量比为1:200~600,超声搅拌,取出聚烯烃纤维,去离子水抽滤、洗涤至pH为7.0~7.5,加入乙二胺基乙磺酸钠溶液,搅拌均匀,加入过氧化二异丙苯,升温至130~135℃,反应3~4h,过滤,去离子水洗涤,恒温干燥,备用;
(2)将步骤(1)得到的聚烯烃纤维加入到辛醇溶液中,滴加硫酸,水浴加热,搅拌,反应1~2h,过滤,采用无水乙醇洗涤聚烯烃纤维,恒温干燥,得到改性聚烯烃纤维;
(3)取纤维素纤维,浸入硫酸溶液中,升温至50~60℃,静置30~40min,过滤,去离子水洗涤,加入聚甲基丙烯酸酯微球、硅烷偶联剂,分散均匀,静置10~20min,恒温干燥;加入步骤(2)制备得到的改性聚烯烃纤维混合;再向其中加入分散剂,疏解1~2h,继续加入粘结剂,搅拌均匀,得到混合浆液;取混合浆液注入抄纸机进行抄纸成型,热压干燥,热压温度为40~60℃,制得高润湿型无纺布锂电池隔膜成品。
3.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:所述步骤(1)中聚烯烃纤维为聚乙烯纤维或聚丙烯纤维中的任意一种,纤维长度为3~10mm。
4.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:步骤(1)中超声搅拌的时间为0.5~2h。
5.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:步骤(2)中的干燥温度为50~60℃,干燥时间为3~6h。
6.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:步骤(3)中的纤维素纤维为棉纤维与木质素纤维的混合纤维,质量比为1:0.5~2。
7.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:步骤(3)中分散剂为聚氧化乙烯、聚丙烯酰胺、聚羧酸钠盐中的任意一种或多种。
8.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:步骤(3)中粘结剂为聚丙烯酸酯类、丙烯腈多元共聚物、丁苯橡胶中的任意一种或多种。
9.根据权利要求1所述的一种高润湿型无纺布锂电池隔膜的制备方法,其特征在于:步骤(3)中聚烯烃纤维、纤维素纤维、水、分散剂、粘结剂的质量比为1:1:2000~3000:2~4:1~5。
10.如权利要求1-9任意一项所述的一种高润湿型无纺布锂电池隔膜制备方法制备得到的高润湿型无纺布锂电池隔膜。
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