Ceramic composite separators coated with moisturized ZrO2 nanoparticles for improving the electrochemical performance and thermal stability of lithium ion batteries

被引：69

作者：

Kim, Ki Jae ^{[1
]}

Kwon, Hyuk Kwon ^{[1
]}

Park, Min-Sik ^{[1
]}

Yim, Taeeun ^{[1
]}

Yu, Ji-Sang ^{[1
]}

Kim, Young-Jun ^{[1
]}

机构：

[1] Korea Elect Technol Inst, Adv Batteries Res Ctr, Songnam 463816, South Korea

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 20期

关键词：

PHASE-INVERSION; MEMBRANES; ELECTROLYTE; MORPHOLOGY; CELLS;

D O I：

10.1039/c4cp00624k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We introduce a ceramic composite separator prepared by coating moisturized ZrO2 nanoparticles with a poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-12wt%HFP) copolymer on a polyethylene separator. The effect of moisturized ZrO2 nanoparticles on the morphology and the microstructure of the polymeric coating layer is investigated. A large number of micropores formed around the embedded ZrO2 nanoparticles in the coating layer as a result of the phase inversion caused by the adsorbed moisture. The formation of micropores highly affects the ionic conductivity and electrolyte uptake of the ceramic composite separator and, by extension, the rate discharge properties of lithium ion batteries. In particular, thermal stability of the ceramic composite separators coated with the highly moisturized ZrO2 nanoparticles (a moisture content of 16000 ppm) is dramatically improved without any degradation in electrochemical performance compared to the performance of pristine polyethylene separators.

引用

页码：9337 / 9343

页数：7

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