| Autor: |
Beichel, W., Skrotzki, J., Klose, P., Njel, C., Butschke, B., Burger, S., Liu, L., Thomann, R., Thomann, Y., Biro, D., Thiele, S., Krossing, I. |
| Přispěvatelé: |
Publica |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Batteries and Supercaps, 5 (2), Art. Nr.: e202100347 |
| ISSN: |
2566-6223 |
| DOI: |
10.5445/ir/1000141585 |
| Popis: |
Upon immersion of a lithium (Li) anode into a diluted 0.05 to 0.20 M dimethoxyethane-solution of the phosphoric acid derivative (CF3CH2O)2P(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 mm 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Plný text