Protective coating for stable cycling of Li-metal batteries based on cellulose and single-ion conducting polymer

Vargas Ordaz, Mariana (avtor), Pavlin, Nejc (avtor), Gastaldi, Matteo (avtor), Gerbaldi, Claudio (avtor), Dominko, Robert (avtor)

The thermodynamically unstable interface between metallic lithium and electrolyte poses a major problem for the massive commercialization of Li-metal batteries. In this study, we propose the use of a multicomponent protective coating based on cellulose modified with dimethylthexylsilyl group (TDMSC), single-ion conducting polymer P(LiMTFSI), and LiNO$_3$ (TDMSC-P(LiMTFSI)-LiNO$_3$, namely PTL). The coating shows its positive effect by increasing the Coulombic efficiency in Li || Cu cells from 95.9 and 98.6% for bare Li, to >99.3% for Li coated (Li@PTL), with 1 M LiFSI in FEC:DEC and 1 M LiFSI in DME electrolyte, respectively. Symmetrical Li || Li PTL-coated cells exhibit a much more prolonged and stable cycling with a slower increase in overpotential compared to bare Li cells. Li@PTL anodes enable improved cycling of Li@PTL/LFP cells compared to noncoated cells in liquid electrolytes. In this respect, inhibition of high surface area lithium growth is confirmed through postcycling scanning electron microscopy. Remarkably, dendrite-free galvanostatic cycling is demonstrated in laboratory-scale solid-state battery cells assembled with LFP composite cathode (catholyte configuration with PEO + LiTFSI as ionically conducting binder) and a cross-linked PEO-based solid polymer electrolyte. The PTL protective coating enables improved stability of Li metal batteries in combination with smooth transport of Li$^+$ at the electrode−electrolyte interface and homogeneous lithium coating, highlighting its promising prospects in enhancing the performance and safety of lithium metal batteries by properly tuning the synergy between the coating components.

• Jezik: Angleški jezik
• Ključne besede: protective coating, lithium metal batteries, cellulose, single ion conductor, P(LiMTFSI)
• 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: Str. 68237–68246
• Številčenje: Vol. 16, iss. 49
• PID: 20.500.12556/RUL-166072
• UDK: 544.5/.6
• ISSN pri članku: 1944-8252
• DOI: 10.1021/acsami.4c13335
• COBISS.SI-ID: 219780611
• Datum objave v RUL: 19.12.2024

Gradivo je del revije

• Naslov: ACS applied materials & interfaces
• Skrajšan naslov: ACS appl. mater. interfaces
• Založnik: American Chemical Society
• ISSN: 1944-8252
• COBISS.SI-ID: 516049433

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, litij-ionske baterije, celuloza, prevodniki