Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 517, Issue -, Pages 91-99Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2016.06.035
Keywords
Polyimide binder; High safety; Ceramic-coating separator; Lithium-ion battery
Categories
Funding
- National Natural Science Foundation of China [21503180, 21273185, 21321062]
- Fundamental Research Funds for the Central Universities [20720140513]
Ask authors/readers for more resources
An effective and practical way to develop the lithium-ion power batteries with better safety performance is to increase the thermal shrinkage resistance of the separator at high temperature. In this work, a ceramic coating separator (CCS-PI) is manufactured by coating Al2O3 ultrafine powder and thermal stable polyimide binder onto the surface of the porous polyethylene (PE) membrane. CCS-PI exhibits no thermal shrinkage up to 160 degrees C in dry state and maintains stable when packed inner the cells up to 165 degrees C. Meanwhile CCS-PI hasn't been punctured during the hot metal rod piercing testing. The above results all prove that the CCS-PI has high thermo-stability. In addition, the CCS-PI presents higher electrolyte uptake, better wettability with the electrolyte and enabled high ionic conductance when it is saturated with liquid electrolyte. The cells with this CCS-PI show good cyclic performance. Therefore, as-prepared CCS-PI is a promising separator to improve thermal safety and capacity retention for lithium-ion power batteries. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available