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Delamination-Free Multifunctional Separator for Long-Term Stability of Lithium-Ion Batteries

Authors
Lee, Sang HyunKim, JungminKim, Byung-HyunYoon, SukeunCho, Kuk Young
Issue Date
Mar-2019
Publisher
WILEY-V C H VERLAG GMBH
Keywords
cathode; separator; anode assembly; lamination process; lithium-ion batteries; multifunctional separator
Citation
SMALL, v.15, no.12
Indexed
SCIE
SCOPUS
Journal Title
SMALL
Volume
15
Number
12
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/3410
DOI
10.1002/smll.201804980
ISSN
1613-6810
Abstract
Next-generation lithium-ion batteries (LIBs) that satisfy the requirements for an electric vehicle energy source should demonstrate high reliability and safety for long-term high-energy-density operation. This inevitably calls for a novel approach to advance major components such as the separator. Herein, a separator is designed and fabricated via application of multilayer functional coating on both sides of a polyethylene separator. The multilayer-coated separator (MCS) has a porous structure that does not interfere with lithium ion diffusion and exhibits superior heat resistance, high electrolyte uptake, and persistent adhesion with the electrode. More importantly, it enables high capacity retention and reduced impedance build up during cycling when used in a coin or pouch cell. These imply its promising application in energy sources requiring long-term stability. Fabrication of the MCS without the use of organic solvents is not only environmentally beneficial but also effective at cost reduction. This approach paves the way for the separator, which has long been considered an inactive major component of LIBs, to become an active contributor to the energy density toward achieving longer cycle stability.
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COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING > 1. Journal Articles

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CHO, KUK YOUNG
ERICA 공학대학 (DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING)
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