Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 30, Issue 25, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202000792
Keywords
antioxidation; humid environments; lithium metal electrodes; printing; solid electrolyte interphase mimic
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Funding
- Research Institute of Industrial Science and Technology (RIST)
- Basic Science Research Program [2017M1A2A2044501, 2018R1A2A1A05019733, 2018M3D1A1058624]
- Wearable Platform Materials Technology Center through National Research Foundation of Korea (NRF) - Ministry of Science, ICT and future Planning [2016R1A5A1009926]
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Despite the ever-growing demand for Li metals as next-generation Li battery electrodes, little attention has been paid to their oxidation stability, which must be achieved for practical applications. Here, a new class of printable solid electrolyte interphase mimic (pSEI) for antioxidative Li metal electrodes is presented. The pSEI (approximate to 1 mu m) is directly fabricated on a thin Li metal electrode (25 mu m) by processing solvent-free, UV polymerization-assisted printing, exhibiting its manufacturing simplicity and scalability. The pSEI is rationally designed to mimic a typical SEI comprising organic and inorganic components, in which ethoxylated trimethylolpropane triacrylate and diallyldimethylammonium bis(trifluoromethanesulfonyl)imide are introduced as an organic mimic (acting as a moisture-repellent structural framework) and inorganic mimic (allowing facile Li-ion transport/high Li+ transference number), respectively. Driven by the chemical/architectural uniqueness, the pSEI enables the thin Li metal electrode to show exceptional antioxidation stability and reliable full cell performance after exposure to humid environments.
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