An ultrathin ionomer interphase for high efficiency lithium anode in carbonate based electrolyte
Journal
Nature Communications
Journal Volume
10
Journal Issue
1
Date Issued
2019
Author(s)
Weng, Y.-T.
Liu, H.-W.
Pei, A.
Shi, F.F.
Wang, H.
Lin, C.-Y.
Huang, S.-S.
Su, L.-Y.
Hsu, J.-P.
Fang, C.-C.
Cui, Y.
Wu, N.-L.
Abstract
High coulombic efficiency and dendrite suppression in carbonate electrolytes remain challenges to the development of high-energy lithium ion batteries containing lithium metal anodes. Here we demonstrate an ultrathin (≤100 nm) lithium-ion ionomer membrane consisting of lithium-exchanged sulfonated polyether ether ketone embedded with polyhedral oligosilsesquioxane as a coating layer on copper or lithium for achieving efficient and stable lithium plating-stripping cycles in a carbonate-based electrolyte. Operando analyses and theoretical simulation reveal the remarkable ability of the ionomer coating to enable electric field homogenization over a considerably large lithium-plating surface. The membrane coating, serving as an artificial solid-electrolyte interphase filter in minimizing parasitic reactions at the electrolyte-electrode interface, enables dendrite-free lithium plating on copper with outstanding coulombic efficiencies at room and elevated (50 °C) temperatures. The membrane coated copper demonstrates itself as a promising current collector for manufacturing high-quality pre-plated lithium thin-film anode.
Type
journal article