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Author

Jung, Yoon Seok
Electrochemical Solid-State Energy Storage Lab
Research Interests
  • Batteries, All-solid-state batteries, solid electrolytes, electrodes, atomic layer deposition,energy storage devices

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Improved Functionality of Lithium-Ion Batteries Enabled by Atomic Layer Deposition on the Porous Microstructure of Polymer Separators and Coating Electrodes

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Title
Improved Functionality of Lithium-Ion Batteries Enabled by Atomic Layer Deposition on the Porous Microstructure of Polymer Separators and Coating Electrodes
Author
Jung, Yoon SeokCavanagh, Andrew S.Gedvilas, LynnWidjonarko, Nicodemus E.Scott, Isaac D.Lee, Se-HeeKim, Gi-HeonGeorge, Steven M.Dillon, Anne C.
Keywords
Cycle lives; Electrochemical performance; Lithium-ion battery; PC-based; Porous microstructure; Porous polymers; Propylene carbonate; Rate capabilities; Thermal shrinkage; Three component
Issue Date
201208
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED ENERGY MATERIALS, v.2, no.8, pp.1022 - 1027
Abstract
Atomic layer deposition (ALD) of Al2O3 is applied on a polypropylene separator for lithium-ion batteries. A thin Al2O3 layer (<10 nm) is coated on every surface of the porous polymer microframework without significantly increasing the total separator thickness. The thin Al2O3 ALD coating results in significantly suppressed thermal shrinkage, which may lead to improved safety of the batteries. More importantly, the wettability of Al2O3 ALD-coated separators in an extremely polar electrolyte based on pure propylene carbonate (PC) solvent is demonstrated, without any decrease in electrochemical performances such as capacity, rate capability, and cycle life. Finally, a LiCoO2/natural graphite full cell is demonstrated under extremely severe conditions (pure PC-based electrolyte and high (4.5 V) upper cut-off potential), which is enabled by the Al2O3 ALD coating on all three components (cathode, anode, and separator).
URI
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DOI
http://dx.doi.org/10.1002/aenm.201100750
ISSN
1614-6832
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