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Enhanced performance of lithium metal batteries via cyclic fluorinated ether based electrolytes
ID Ishfaq, Hafiz Ahmad (Avtor), ID Cruz Cardona, Carolina (Avtor), ID Tchernychova, Elena (Avtor), ID Johansson, Patrik (Avtor), ID Dominko, Robert (Avtor), ID Drvarič Talian, Sara (Avtor)

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Izvleček
To address the challenges associated with applying high-voltage cathodes in lithium metal batteries (LMBs) there is a need for new electrolytes enabling stable interphases at both electrodes. Here we attack this by using a dioxolane-derived cyclic fluorinated ether, 2,2-bis(trifluoromethyl)-1,3-dioxolane (BTFD), as a fluorinated diluent to a 1,2-dimethoxyethane (DME) based electrolyte. The cells using the resulting BTFD-based electrolytes exhibit higher Coulombic efficiencies for lithium stripping and plating as compared to those using the non-fluorinated ether-based electrolyte. This originates from the reduced formation of ‘dead Li’ at the anode, as shown by using electrochemical impedance spectroscopy (EIS). In practice, the BTFD-based electrolytes are shown to improve the performance of Li||NMC cells, which is due to the formation of a predominantly inorganic cathode electrolyte interphase (CEI) that suppresses the cathode degradation during cycling. We used X-ray photoelectron spectroscopy (XPS) and scanning transmission electron microscopy (STEM) to characterize the CEIs’ overall composition and structure. To obtain more details on the CEI speciation, Raman and nuclear magnetic resonance (NMR) spectroscopies were employed, assisted by molecular level computations. Overall, we demonstrate how the very design of the electrolyte composition influences the performance of LMBs.

Jezik:Angleški jezik
Ključne besede:lithium metal batteries, high-voltage cathode, fluorinated electrolyte, locally highly concentrated electrolyte, solvation structure
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Leto izida:2024
Št. strani:10 str.
Številčenje:Vol. 69, art. 103375
PID:20.500.12556/RUL-156288 Povezava se odpre v novem oknu
UDK:544.5/.6
ISSN pri članku:2405-8289
DOI:10.1016/j.ensm.2024.103375 Povezava se odpre v novem oknu
COBISS.SI-ID:193555203 Povezava se odpre v novem oknu
Datum objave v RUL:17.05.2024
Število ogledov:521
Število prenosov:54
Metapodatki:XML DC-XML DC-RDF
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Gradivo je del revije

Naslov:Energy storage materials
Založnik:Elsevier
ISSN:2405-8289
COBISS.SI-ID:87651587 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:elektrokemija, akumulatorji, baterije, elektroliti, fluoridi

Projekti

Financer:EC - European Commission
Program financ.:H2020
Številka projekta:945357
Naslov:Doctorate Programme on Emerging Battery Storage Technologies INspiring Young scientists
Akronim:DESTINY

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0423
Naslov:Sodobni akumulatorji kot podpora zelenemu prehodu in elektromobilnosti

Financer:Drugi - Drug financer ali več financerjev
Program financ.:VINNOVA, Batteries Sweden (BASE)
Številka projekta:2019-00064

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Swedish Research Council (VR), Distinguished Professor
Številka projekta:2021-00613
Naslov:Next Generation Batteries

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