An Artificial SEI Layer Based on an Inorganic Coordination Polymer with Self-Healing Ability for Long-Lived Rechargeable Lithium-Metal Batteries
Beichel W, Skrotzki J, Klose P, Njel C, Butschke B, Burger S, Liu L, Thomann R, Thomann Y, Biro D, Thiele S, Krossing I (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Abstract
Upon immersion of a lithium (Li) anode into a diluted 0.05 to 0.20 M dimethoxyethane solution of the phosphoric-acid derivative (CF3CH2O)(2)P(O)OH (HBFEP), an artificial solid-electrolyte interphase (SEI) is generated on the Li-metal surface. Hence, HBFEP reacts on the surface to the corresponding Li salt (LiBFEP), which is a Li-ion conducting inorganic coordination polymer. This film exhibits - due to the reversibly breaking ionic bonds - self-healing ability upon cycling-induced volume expansion of Li. The presence of LiBFEP as the major component in the artificial SEI is proven by ATR-IR and XPS measurements. SEM characterization of HBFEP-treated Li samples reveals porous layers on top of the Li surface with at least 3 pm thickness. Li-Li symmetrical cells with HBFEP-modified Li electrodes show a three- to almost fourfold cycle-lifetime increase at 0.1 mA cm(-2) in a demanding model electrolyte that facilitates fast battery failure (1 M LiOTf in TEGDME). Hence, the LiBFEP-enriched layer apparently acts as a Li-ion conducting protection barrier between Li and the electrolyte, enhancing the rechargeability of Li electrodes.
Authors with CRIS profile
Involved external institutions
Albert-Ludwigs-Universität Freiburg
Germany (DE)
Karlsruhe Institute of Technology (KIT)
Germany (DE)
NanJing Tech University
China (CN)
Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems
Germany (DE)
Forschungszentrum Jülich / Research Centre Jülich (FZJ)
Germany (DE)
Germany (DE)
Karlsruhe Institute of Technology (KIT)
Germany (DE)
NanJing Tech University
China (CN)
Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems
Germany (DE)
Forschungszentrum Jülich / Research Centre Jülich (FZJ)
Germany (DE)
How to cite
APA:
Beichel, W., Skrotzki, J., Klose, P., Njel, C., Butschke, B., Burger, S.,... Krossing, I. (2021). An Artificial SEI Layer Based on an Inorganic Coordination Polymer with Self-Healing Ability for Long-Lived Rechargeable Lithium-Metal Batteries. Batteries & Supercaps. https://doi.org/10.1002/batt.202100347
MLA:
Beichel, Witali, et al. "An Artificial SEI Layer Based on an Inorganic Coordination Polymer with Self-Healing Ability for Long-Lived Rechargeable Lithium-Metal Batteries." Batteries & Supercaps (2021).
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