Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF 6

doi:10.1021/acs.jpcc.7b08433

Title: Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF ₆

Abstract

The anode solid electrolyte interface (SEI) on the anode of lithium ion batteries contains lithium carbonate (Li ₂CO ₃), lithium methyl carbonate (LMC), and lithium ethylene dicarbonate (LEDC). The development of a strong physical understanding of the properties of the SEI requires a strong understanding of the evolution of the SEI composition over extended timeframes. The thermal stability of Li ₂CO ₃, LMC, and LEDC in the presence of LiPF ₆ in dimethyl carbonate (DMC), a common salt and solvent, respectively, in lithium ion battery electrolytes, has been investigated to afford a better understanding of the evolution of the SEI. The residual solids from the reaction mixtures have been characterized by a combination of X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy with attenuated total reflectance (IR-ATR), while the solution and evolved gases have been investigated by nuclear magnetic resonance (NMR) spectroscopy and gas chromatography with mass selective detection (GC-MS). The thermal decomposition of Li ₂CO ₃ and LiPF ₆ in DMC yields CO ₂, LiF, and F ₂PO ₂Li. The thermal decomposition of LMC and LEDC with LiPF6 in DMC results in the generation of a complicated mixture including CO ₂, LiF, ethers, phosphates, and fluorophosphates.

Authors:

Parimalam, Bharathy S. ^[1]; MacIntosh, Alex D. ^[1]; Kadam, Rahul ^[1];

^[1]

Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States

Publication Date:: 2017-10-02

Research Org.:: Univ. of Rhode Island, Kingston, RI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI Identifier:: 1405196

Alternate Identifier(s):: OSTI ID: 1507999

Grant/Contract Number:: DE?SC0007074; SC0007074

Resource Type:: Published Article

Journal Name:: Journal of Physical Chemistry. C

Additional Journal Information:: Journal Name: Journal of Physical Chemistry. C Journal Volume: 121 Journal Issue: 41; Journal ID: ISSN 1932-7447

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Parimalam, Bharathy S., MacIntosh, Alex D., Kadam, Rahul, and Lucht, Brett L. Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF 6.  United States: N. p., 2017. 
        Web.  doi:10.1021/acs.jpcc.7b08433.

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                    Parimalam, Bharathy S., MacIntosh, Alex D., Kadam, Rahul, & Lucht, Brett L. Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF 6.  United States.  doi:10.1021/acs.jpcc.7b08433.

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                    Parimalam, Bharathy S., MacIntosh, Alex D., Kadam, Rahul, and Lucht, Brett L. Mon .  
        "Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF 6".  United States.  doi:10.1021/acs.jpcc.7b08433.

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@article{osti_1405196,

  title        = {Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF 6},

  author       = {Parimalam, Bharathy S. and MacIntosh, Alex D. and Kadam, Rahul and Lucht, Brett L.},

  abstractNote = {The anode solid electrolyte interface (SEI) on the anode of lithium ion batteries contains lithium carbonate (Li2CO3), lithium methyl carbonate (LMC), and lithium ethylene dicarbonate (LEDC). The development of a strong physical understanding of the properties of the SEI requires a strong understanding of the evolution of the SEI composition over extended timeframes. The thermal stability of Li2CO3, LMC, and LEDC in the presence of LiPF6 in dimethyl carbonate (DMC), a common salt and solvent, respectively, in lithium ion battery electrolytes, has been investigated to afford a better understanding of the evolution of the SEI. The residual solids from the reaction mixtures have been characterized by a combination of X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy with attenuated total reflectance (IR-ATR), while the solution and evolved gases have been investigated by nuclear magnetic resonance (NMR) spectroscopy and gas chromatography with mass selective detection (GC-MS). The thermal decomposition of Li2CO3 and LiPF6 in DMC yields CO2, LiF, and F2PO2Li. The thermal decomposition of LMC and LEDC with LiPF6 in DMC results in the generation of a complicated mixture including CO2, LiF, ethers, phosphates, and fluorophosphates.},

  doi          = {10.1021/acs.jpcc.7b08433},

  journal      = {Journal of Physical Chemistry. C},

  number       = 41,

  volume       = 121,

  place        = {United States},

  year         = {2017},

  month        = {10}

}

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DOI: 10.1021/acs.jpcc.7b08433

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Cited by: 12 works

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Figure 1: ¹⁹F and ³¹P NMR spectra of sample (a) 0.65 M LiPF₆/DMC, (b) Li₂CO₃ in 0.65 M LiPF₆/DMC, (c) LMC in 0.65 M LiPF₆/ DMC, and (d) LEDC in 0.65 M LiPF₆/DMC s after 48 h of storage at 55 °C.

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Title: Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF 6

Abstract

Citation Formats

Figures / Tables:

Ultrathin conformal polycyclosiloxane films to improve silicon cycling stability journal, July 2019

Title: Decomposition Reactions of Anode Solid Electrolyte Interphase (SEI) Components with LiPF ₆

Ultrathin conformal polycyclosiloxane films to improve silicon cycling stability
journal, July 2019