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Self-propagating fabrication of SiO x @rGO film with superior cycling stability and rate performance as anode for lithium-ion batteries

Self-propagating fabrication of SiO x @rGO film with superior... With high theoretical capacity and suitable operating potential, SiOxis regarded as one of the most promising anode materials for high-energy density lithium-ion batteries (LIBs), but it suffers from large volume change during charge/discharge and low electronic conductivity, leading to poor cycling stability and rate capability. To overcome these problems, a SiOx@ reduced graphene oxide (rGO) film with porous structure is prepared through vacuum filtration and self-propagation reduction method, which can be directly used as a free-standing anode for LIBs. The self-propagation process of graphene oxide to graphene can be completed rapidly within 1 s, and endows the film with developed pores due to the instantaneous release of substantial gases. The porous structure is beneficial for exposing massive active sites, facilitating fast ion transport and buffering the volume change of the SiOxduring charge/discharge. Moreover, the rGO sheets construct a conductive framework for rapid electron transfer in the film. As a result, the SiOx@rGO film exhibits high lithium storage capacity (1189.7 mAh g−1 at 0.1 A g−1), excellent cycling stability (81.1% capacity retention after 100 cycles) and good rate capability (349.2 mAh g−1 at 3.2 A g−1). This study not only provides a high-performance film anode material for LIBs, but also develops a simple and efficient method for constructing porous film electrodes for various energy storage devices. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png 2D Materials IOP Publishing

Self-propagating fabrication of SiO x @rGO film with superior cycling stability and rate performance as anode for lithium-ion batteries

2D Materials , Volume 9 (4): 9 – Oct 1, 2022

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Publisher
IOP Publishing
Copyright
© 2022 IOP Publishing Ltd
eISSN
2053-1583
DOI
10.1088/2053-1583/ac9c14
Publisher site
See Article on Publisher Site

Abstract

With high theoretical capacity and suitable operating potential, SiOxis regarded as one of the most promising anode materials for high-energy density lithium-ion batteries (LIBs), but it suffers from large volume change during charge/discharge and low electronic conductivity, leading to poor cycling stability and rate capability. To overcome these problems, a SiOx@ reduced graphene oxide (rGO) film with porous structure is prepared through vacuum filtration and self-propagation reduction method, which can be directly used as a free-standing anode for LIBs. The self-propagation process of graphene oxide to graphene can be completed rapidly within 1 s, and endows the film with developed pores due to the instantaneous release of substantial gases. The porous structure is beneficial for exposing massive active sites, facilitating fast ion transport and buffering the volume change of the SiOxduring charge/discharge. Moreover, the rGO sheets construct a conductive framework for rapid electron transfer in the film. As a result, the SiOx@rGO film exhibits high lithium storage capacity (1189.7 mAh g−1 at 0.1 A g−1), excellent cycling stability (81.1% capacity retention after 100 cycles) and good rate capability (349.2 mAh g−1 at 3.2 A g−1). This study not only provides a high-performance film anode material for LIBs, but also develops a simple and efficient method for constructing porous film electrodes for various energy storage devices.

Journal

2D MaterialsIOP Publishing

Published: Oct 1, 2022

Keywords: SiO x ; anode materials; lithium-ion batteries; graphene; self-propagation

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