What question did this study set out to answer?

Investigate the solid electrolyte interphase (SEI) formation and surface reactions on binder-free silicon nanoparticle anodes cycled in different lithium-ion battery electrolyte systems.

June 7, 2013Journal of Media Literacy EducationOpen Access

Silicon Solid Electrolyte Interphase (SEI) of Lithium Ion Battery Characterized by Microscopy and Spectroscopy

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Authors

MNMengyun NieDalhousie University DADaniel P. AbrahamArgonne National Laboratory YCYanjing ChenPeking University

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Implication

Experimental study reveals improved capacity retention with fluoroethylene carbonate in silicon lithium-ion battery anodes, indicating superior interfacial layer stability.

Key Points

Investigate the solid electrolyte interphase (SEI) formation and surface reactions on binder-free silicon nanoparticle anodes cycled in different lithium-ion battery electrolyte systems.
Constructed binder-free silicon nanoparticle coin cells (BF-Si/Li) and cycled them in electrolytes containing LiPF6 salt with either ethylene carbonate (EC) or fluoroethylene carbonate (FEC) solvent.
Characterized SEI evolution using transmission electron microscopy with energy dispersive X-ray spectroscopy (TEM-EDX) and multi-nuclear magnetic resonance (NMR) spectroscopy of D2O extracts, complemented by XPS and FTIR.
Capacity retention was significantly higher in cells cycled with LiPF6/FEC electrolyte than in cells cycled with LiPF6/EC electrolyte.
For LiPF6/EC electrolyte, the SEI continuously expanded during the initial 20 cycles and integrated into the BF-Si nanoparticles, predominantly consisting of lithium ethylene dicarbonate, LiF, and LixSiOy.
For LiPF6/FEC electrolyte, BF-Si nanoparticles remained distinct from the SEI layer, which was mainly composed of LiF, LixSiOy, and an insoluble polymeric species.

Cite This Study

Nie et al. (2013) studied this question.

synapsesocial.com/papers/69d7fad13eff0c9dfaae2fc8 https://doi.org/10.1021/jp404155y

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Implication

Experimental study reveals improved capacity retention with fluoroethylene carbonate in silicon lithium-ion battery anodes, indicating superior interfacial layer stability.

Silicon Solid Electrolyte Interphase (SEI) of Lithium Ion Battery Characterized by Microscopy and Spectroscopy

Discussion

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Implication

Key Points

Cite This Study

Silicon Solid Electrolyte Interphase (SEI) of Lithium Ion Battery Characterized by Microscopy and Spectroscopy

Discussion

Member takes

Implication

Key Points

Cite This Study

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