Influence of Lithium Salts on Solid Electrolyte Interphase Formation and Interfacial Resistance in Silicon Monoxide-Based Lithium Secondary Batteries

Hyeri Yun; Soon Ki Jeong

doi:10.4028/p-PHu5Rp

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 442Influence of Lithium Salts on Solid Electrolyte...

Influence of Lithium Salts on Solid Electrolyte Interphase Formation and Interfacial Resistance in Silicon Monoxide-Based Lithium Secondary Batteries

Abstract:

Different lithium salts influence the formation of the solid electrolyte interphase (SEI) layer and interfacial resistance in silicon monoxide (SiO)-based lithium secondary batteries. This study examined the effects of four lithium salts, specifically LiPF₆, LiBF₄, LiClO₄, and LiCF₃SO₃, on SEI characteristics and electrochemical performance using cyclic voltammetry and electrochemical impedance spectroscopy. The results indicate that SEI formation is essential for stabilizing the electrode interface, with each lithium salt significantly affecting the physicochemical properties of the SEI and interfacial resistance. Notably, LiClO₄ produced a more conductive SEI layer, reducing overall resistance and enhancing lithiation efficiency, while LiCF₃SO₃ exhibited better electrode compatibility, resulting in improved Coulombic efficiency. These findings highlight the potential for optimizing lithium salt composition in the electrolyte to improve the stability, cycle life, and performance of SiO-based lithium-ion batteries.

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Periodical:

Defect and Diffusion Forum (Volume 442)

Pages:

29-34

DOI:

https://doi.org/10.4028/p-PHu5Rp

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Online since:

May 2025

Authors:

Hyeri Yun, Soon Ki Jeong*

Keywords:

Interfacial Resistance, Lithium Salt, Lithium Secondary Batteries, Propylene Carbonate, SiO-Based Negaive Electrode, Solid Electrolyte Interface

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* - Corresponding Author

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