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Title: Si Oxidation and H 2 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 H 2 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 H 2. Si oxidation also occurs through atmospheric O 2 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:
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
  3. 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. doi: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. doi: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 = {2018},
month = {4}
}

Journal Article:
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Cited by: 1 work
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Abstract Graphic Abstract Graphic: 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 generationmore » of H2. Si oxidation also occurs through atmospheric O2 consumption.« less

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