CaltechAUTHORS
Published April 14, 2021 | Version Supplemental Material
Journal Article Open

Manipulating Oxidation of Silicon with Fresh Surface Enabling Stable Battery Anode

Creators

  • 1. ROR icon Wuhan National Laboratory for Optoelectronics
  • 2. ROR icon China Three Gorges University
  • 3. ROR icon California Institute of Technology

Abstract

Silicon (Si)-based material is a promising anode material for next-generation lithium-ion batteries (LIBs). Herein, we report the fabrication of a silicon oxide–carbon (SiO_x/C) nanocomposite through the reaction between silicon particles with fresh surface and H₂O in a mild hydrothermal condition, as well as conducting carbon coating synchronously. We found that controllable oxidation could be realized for Si particles to produce uniform SiO_x after the removal of the native passivation layer. The uniform oxidation and conductive coating offered the as-fabricated SiO_x/C composite good stability at both particle and electrode level over electrochemical cycling. The as-fabricated SiO_x/C composite delivered a high reversible capacity of 1133 mAh g⁻¹ at 0.5 A g⁻¹ with 89.1% capacity retention after 200 cycles. With 15 wt % SiO-x/C composite, graphite-SiO_x/C hybrid electrode displayed a high reversible specific capacity of 496 mAh g⁻¹ and stable electrochemical cycling with a capacity retention of 90.1% for 100 cycles.

Additional Information

© 2021 American Chemical Society. Received: January 26, 2021; Revised: March 15, 2021; Published: March 18, 2021. This work was supported by National Key R&D Program of China (2018YFB0905400), Major Technological Innovation Project of Hubei Science and Technology Department (2019AAA164). Y.S. acknowledges the financial support by the Innovation Fund of Wuhan National Laboratory for Optoelectronics of Huazhong University of Science and Technology. C.Q. acknowledges the support of the Natural Sciences and Engineering Research Council of Canada (NSERC Postdoctoral Fellowship). The authors would like to thank the Analytical and Testing Center of Huazhong University of Science and Technology (HUST) as well as the Center for Nanoscale Characterization and Devices of Wuhan National Laboratory for Optoelectronics (WNLO) for providing the facilities to conduct the characterizations. Author Contributions: G.G. and G.L. contributed equally to this work. The authors declare no competing financial interest.

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Additional details

Identifiers

Eprint ID
108505
DOI
10.1021/acs.nanolett.1c00317
Resolver ID
CaltechAUTHORS:20210322-101751350

Funding

National Key Research and Development Program of China
2018YFB0905400
Major Technological Innovation Project of Hubei Science and Technology Department
2019AAA164
Wuhan National Laboratory
Huazhong University of Science and Technology
Natural Sciences and Engineering Research Council of Canada (NSERC)

Dates

Created
2021-03-24
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Updated
2023-10-02
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