Journal
JOURNAL OF POWER SOURCES
Volume 325, Issue -, Pages 732-738Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.06.094
Keywords
Separator; Thickness and porosity; Gurley number; Ionic conductance; Lithium-ion battery
Funding
- Ministry of Education (MOE) of Korea through the Human Resource Training Project for Regional Innovation [2014066977]
- National Research Foundation (NRF) of Korea through the Human Resource Training Project for Regional Innovation [2014066977]
- Ministry of Trade, Industry & Energy (MOTIE), Korea Institute for Advancement of Technology (MAT) through the Encouragement Program for The Industries of Economic Cooperation Region [R0004649-1]
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To establish an accurate correlation between a separator's pore structure and the electrochemical performance of a lithium-ion battery (LIB), we fabricate well defined polyethylene (PE) separators on the same production line while maintaining most processing variables, except for composition. Four PE separators having different thicknesses and porosities (16 mu m/37%, 16 mu m/40%, 16 mu m/47%, 22 mu m/47%, respectively) are physically and electrochemically evaluated in detail. Although thickness and porosity remain good parameters by which to represent the separators' characteristics, both the normalized Gurley number and ionic conductance are found to have much stronger relationships with the rate capability. (C) 2016 Elsevier B.V. All rights reserved.
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