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 (≈1 µm) is directly fabricated on a thin Li metal electrode (25 µm) 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.
Bibliographical noteFunding Information:
S.‐K.C. and H.‐I.K. contributed equally to this work. This work was supported by the Research Institute of Industrial Science and Technology (RIST), the Basic Science Research Program (2017M1A2A2044501, 2018R1A2A1A05019733, and 2018M3D1A1058624), and Wearable Platform Materials Technology Center (2016R1A5A1009926) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and future Planning.
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics