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Title: A Micrometer‐Sized Silicon/Carbon Composite Anode Synthesized by Impregnation of Petroleum Pitch in Nanoporous Silicon

Abstract

Abstract Porous silicon (Si)/carbon nanocomposites have been extensively explored as a promising anode material for high‐energy lithium (Li)‐ion batteries (LIBs). However, shrinking of the pores and sintering of Si in the nanoporous structure during fabrication often diminishes the full benefits of nanoporous Si. Herein, a scalable method is reported to preserve the porous Si nanostructure by impregnating petroleum pitch inside of porous Si before high‐temperature treatment. The resulting micrometer‐sized Si/C composite maintains a desired porosity to accommodate large volume change and high conductivity to facilitate charge transfer. It also forms a stable surface coating that limits the penetration of electrolyte into nanoporous Si and minimizes the side reaction between electrolyte and Si during cycling and storage. A Si‐based anode with 80% of pitch‐derived carbon/nanoporous Si enables very stable cycling of a Si||Li(Ni0.5Co0.2Mn0.3)O 2 (NMC532) battery (80% capacity retention after 450 cycles). It also leads to low swelling in both particle and electrode levels required for the next generation of high‐energy LIBs. The process also can be used to preserve the porous structure of other nanoporous materials that need to be treated at high temperatures.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [2];  [3];  [3];  [2]; ORCiD logo [3]
  1. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA, Department of Industrial Chemistry Pukyong National University Busan 48513 Republic of Korea
  2. Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
  3. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1821051
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Name: Advanced Materials Journal Volume: 33 Journal Issue: 40; Journal ID: ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Chae, Sujong, Xu, Yaobin, Yi, Ran, Lim, Hyung‐Seok, Velickovic, Dusan, Li, Xiaolin, Li, Qiuyan, Wang, Chongmin, and Zhang, Ji‐Guang. A Micrometer‐Sized Silicon/Carbon Composite Anode Synthesized by Impregnation of Petroleum Pitch in Nanoporous Silicon. Germany: N. p., 2021. Web. doi:10.1002/adma.202103095.
Chae, Sujong, Xu, Yaobin, Yi, Ran, Lim, Hyung‐Seok, Velickovic, Dusan, Li, Xiaolin, Li, Qiuyan, Wang, Chongmin, & Zhang, Ji‐Guang. A Micrometer‐Sized Silicon/Carbon Composite Anode Synthesized by Impregnation of Petroleum Pitch in Nanoporous Silicon. Germany. https://doi.org/10.1002/adma.202103095
Chae, Sujong, Xu, Yaobin, Yi, Ran, Lim, Hyung‐Seok, Velickovic, Dusan, Li, Xiaolin, Li, Qiuyan, Wang, Chongmin, and Zhang, Ji‐Guang. Mon . "A Micrometer‐Sized Silicon/Carbon Composite Anode Synthesized by Impregnation of Petroleum Pitch in Nanoporous Silicon". Germany. https://doi.org/10.1002/adma.202103095.
@article{osti_1821051,
title = {A Micrometer‐Sized Silicon/Carbon Composite Anode Synthesized by Impregnation of Petroleum Pitch in Nanoporous Silicon},
author = {Chae, Sujong and Xu, Yaobin and Yi, Ran and Lim, Hyung‐Seok and Velickovic, Dusan and Li, Xiaolin and Li, Qiuyan and Wang, Chongmin and Zhang, Ji‐Guang},
abstractNote = {Abstract Porous silicon (Si)/carbon nanocomposites have been extensively explored as a promising anode material for high‐energy lithium (Li)‐ion batteries (LIBs). However, shrinking of the pores and sintering of Si in the nanoporous structure during fabrication often diminishes the full benefits of nanoporous Si. Herein, a scalable method is reported to preserve the porous Si nanostructure by impregnating petroleum pitch inside of porous Si before high‐temperature treatment. The resulting micrometer‐sized Si/C composite maintains a desired porosity to accommodate large volume change and high conductivity to facilitate charge transfer. It also forms a stable surface coating that limits the penetration of electrolyte into nanoporous Si and minimizes the side reaction between electrolyte and Si during cycling and storage. A Si‐based anode with 80% of pitch‐derived carbon/nanoporous Si enables very stable cycling of a Si||Li(Ni0.5Co0.2Mn0.3)O 2 (NMC532) battery (80% capacity retention after 450 cycles). It also leads to low swelling in both particle and electrode levels required for the next generation of high‐energy LIBs. The process also can be used to preserve the porous structure of other nanoporous materials that need to be treated at high temperatures.},
doi = {10.1002/adma.202103095},
journal = {Advanced Materials},
number = 40,
volume = 33,
place = {Germany},
year = {Mon Aug 16 00:00:00 EDT 2021},
month = {Mon Aug 16 00:00:00 EDT 2021}
}

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