Extended cycle life in lithium-ion batteries through lithium supplementation from Li$_2$C$_4$O$_4$@SiO$_2$ microcapsules

Pal, Bhupender (avtor), Jurečič, Luka (avtor), Gabrijelčič, Matej (avtor), Dominko, Robert (avtor)

The formation of a solid electrolyte interphase (SEI) in lithium-ion batteries consumes active lithium ions, resulting in loss of capacity and decreased cycle life. Most prelithiation methods only address the initial lithium depletion by compensating with a source of lithium ions, overlooking the ongoing lithium consumption through continuous degradation processes. In this study, Li$_2$C$_4$O$_4$@SiO$_2$ microcapsules are presented, in which Li$_2$C$_4$O$_4$ serves as an additional source of lithium ions and the porous SiO$_2$ shell prevents unwanted catalytic reactions, ensuring sustained lithium availability throughout the cycling. The microcapsules are synthesized using a wet impregnation method and characterized using various techniques to confirm their structural, morphological, and compositional properties. Ex situ nuclear magnetic resonance (NMR) analysis demonstrated lithium-ion mobility, and electrochemical tests in full-cell configurations with graphite and graphite/silicon anodes confirmed improved capacity retention and cycle life. This work highlights the potential of microencapsulated lithium-ion sources to improve battery performance in various lithium-ion systems and opens a pathway for battery cells with self-healing functionality that can be triggered on demand.

• Jezik: Angleški jezik
• Ključne besede: lithium-ion battery, microcapsules, ex-situ NMR, cathode additive, degradation, dilithium squarate, Li-ion batteries, lithiation additive, self-healing
• 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: 2026
• Št. strani: 9 str.
• Številčenje: Vol. 9, iss. 1, art. e202500444
• PID: 20.500.12556/RUL-172577
• UDK: 621.352
• ISSN pri članku: 2566-6223
• DOI: 10.1002/batt.202500444
• COBISS.SI-ID: 247147011
• Datum objave v RUL: 09.09.2025

Gradivo je del revije

• Naslov: Batteries & supercaps
• Založnik: Wiley, Chemistry Europe
• ISSN: 2566-6223
• COBISS.SI-ID: 30750979

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: litij-ionski akumulator, mikrokapsule, ex-situ jedrska magnetna resonanca