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在水性核心外乳液中的工程碳素含量,用于高效的无机涂层分离器,提高离子电池安全性能

Yinghao Xia¹, Dejian Cheng¹, Yujie Li¹

¹Research Institute of Materials Science, South China University of Technology, Guangzhou, 510640, China.

|February 4, 2025

概括

这项研究引入了一种用于离子电池的新型化涂层聚烯分离器. 复合材料分离器提高了热稳定性和电池性能,防止热失控.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物科学聚合物科学

背景情况:

聚烯 (PP) 分离器对于离子电池至关重要,但在高温下遭受热收缩,导致短路和热失控等安全问题.
提高电池分离器的热稳定性和离子导电性对于提高离子电池安全性和性能至关重要.

研究的目的:

设计和制造一个复合材料分离器,以提高尺寸稳定性和电化学性能.
研究化涂层和新型乳液粘合剂对聚烯分离器性能的影响.
评估烯酸作为功能性单体对结合剂和分离器性能的影响.

主要方法:

合成了一种含有丰富的炭基和基的水性核心外乳液粘合剂.
聚烯分离器被涂上 (Al2O3) 使用开发的乳液粘合剂.
评估了离子电池中复合分离器的维度稳定性,离子导电性,离子转移数和循环性能.
研究了烯酸作为功能单体的影响.

主要成果:

复合材料分离器在120°C时表现出极好的尺寸稳定性,厚度增加最小 (2.5μm).
与PP分离器相比,离子导电率提高了25% (0.82mS/cm),离子转移数为0.47.
使用复合材料分离器的离子电池的循环容量在100个循环后比PP分离器高8.62%.

结论:

开发的合金涂层复合材料分离器显著提高了离子电池的热稳定性和电化学性能.
这种新型的乳液粘合剂提供了强大的粘合力,并有助于改善离子导电性和维度稳定性.
这些发现表明,开发更安全,更高效的离子电池分离器是一个有前途的方法.

关键词:

炭基组是碳基组的一个组成部分.乳液聚合物的聚合化离子电池的电池是离子电池的电池.聚烯酸盐结合剂聚烯酸盐结合剂分离器分离器分离器

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