Si Oxidation and H2 Gassing During Aqueous Slurry Preparation for Li-Ion Battery Anodes
Abstract
Si has the possibility to greatly increase the energy density of Li-ion battery anodes, though it is not without its problems. One issue often overlooked is the decomposition of Si during large scale slurry formulation and battery fabrication. Here, we investigate the mechanism of H2 production to understand the role of different slurry components and their impact on the Si oxidation and surface chemistry. Mass spectrometry and in situ pressure monitoring identifies that carbon black plays a major role in promoting the oxidation of Si and generation of H2. Si oxidation also occurs through atmospheric O2 consumption. Both pathways, along with solvent choice, impact the surface silanol chemistry, as analyzed by 1H–29Si cross-polarization magic angle spinning nuclear magnetic resonance (MAS NMR) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR). An understanding of the oxidation of Si, during slurry processing, provides a pathway toward improving the manufacturing of Si based anodes by maximizing its capacity and minimizing safety hazards.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- OSTI Identifier:
- 1436953
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry. C
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 18; Journal ID: ISSN 1932-7447
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
Hays, Kevin A., Key, Baris, Li, Jianlin, Wood, David L., and Veith, Gabriel M. Si Oxidation and H2 Gassing During Aqueous Slurry Preparation for Li-Ion Battery Anodes. United States: N. p., 2018.
Web. doi:10.1021/acs.jpcc.8b01062.
Hays, Kevin A., Key, Baris, Li, Jianlin, Wood, David L., & Veith, Gabriel M. Si Oxidation and H2 Gassing During Aqueous Slurry Preparation for Li-Ion Battery Anodes. United States. https://doi.org/10.1021/acs.jpcc.8b01062
Hays, Kevin A., Key, Baris, Li, Jianlin, Wood, David L., and Veith, Gabriel M. Tue .
"Si Oxidation and H2 Gassing During Aqueous Slurry Preparation for Li-Ion Battery Anodes". United States. https://doi.org/10.1021/acs.jpcc.8b01062. https://www.osti.gov/servlets/purl/1436953.
@article{osti_1436953,
title = {Si Oxidation and H2 Gassing During Aqueous Slurry Preparation for Li-Ion Battery Anodes},
author = {Hays, Kevin A. and Key, Baris and Li, Jianlin and Wood, David L. and Veith, Gabriel M.},
abstractNote = {Si has the possibility to greatly increase the energy density of Li-ion battery anodes, though it is not without its problems. One issue often overlooked is the decomposition of Si during large scale slurry formulation and battery fabrication. Here, we investigate the mechanism of H2 production to understand the role of different slurry components and their impact on the Si oxidation and surface chemistry. Mass spectrometry and in situ pressure monitoring identifies that carbon black plays a major role in promoting the oxidation of Si and generation of H2. Si oxidation also occurs through atmospheric O2 consumption. Both pathways, along with solvent choice, impact the surface silanol chemistry, as analyzed by 1H–29Si cross-polarization magic angle spinning nuclear magnetic resonance (MAS NMR) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR). An understanding of the oxidation of Si, during slurry processing, provides a pathway toward improving the manufacturing of Si based anodes by maximizing its capacity and minimizing safety hazards.},
doi = {10.1021/acs.jpcc.8b01062},
journal = {Journal of Physical Chemistry. C},
number = 18,
volume = 122,
place = {United States},
year = {Tue Apr 24 00:00:00 EDT 2018},
month = {Tue Apr 24 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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