An efficient prelithiation of graphene oxide nanoribbons wrapping silicon nanoparticles for stable Li+ storage

In this study, silicon nanoparticles are encapsulated by graphene oxide nanoribbons (GONRs) to form a three-dimensional conductive network by an electrostatic-induced self-assemble process. The flexible and interlaced network of GONRs can not only enhance the electrical conductivity of the composite...

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Bibliographic Details
Published in:Carbon (New York) 2020-10, Vol.168, p.392-403
Main Authors: Yao, Cong, Li, Xinlu, Deng, Yingxiong, Li, Yongjian, Yang, Peng, Zhang, Song, Yuan, Jing, Wang, Ronghua
Format: Article
Language:English
Subjects:
Anodes
Composite materials
Conductivity
Cycles
Efficiency
Electric contacts
Electrical resistivity
Electrode materials
Graphene
Graphene oxide nanoribbons
Lithium-ion batteries
Nanoparticles
Nanoribbons
Prelithiation
Silicon
Stability
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Summary:In this study, silicon nanoparticles are encapsulated by graphene oxide nanoribbons (GONRs) to form a three-dimensional conductive network by an electrostatic-induced self-assemble process. The flexible and interlaced network of GONRs can not only enhance the electrical conductivity of the composite, but also accommodate the drastic volume change during the charge-discharge process. The optimal Si/GONRs-0.4 composite delivers a high rate capacity of 730 mA h g−1 at 6 A g−1 and maintains the reversible capacity of 1185 mA h g−1 at 1.0 A g−1 over 500 cycles. In particular,a direct contact prelithiation is used to improve the initial coulombic efficiency. The optimal prelithiation enable to achieve the high initial coulombic efficiency of 97.1% as well as excellent cycling stability that remains 1235 mA h g−1 at 1.0 A g−1 and 969 mA h g−1 at 2.0 A g−1 after 500 cycles, respectively. We hope that the Si/GONRs-0.4 composite after 5 min prelithiation with high specific capacity, excellent cycling stability and high initial coulombic efficiency has great potential to become the next-generation anode material for LIBs. [Display omitted] •Nano-silicon entwined by graphene oxide nanoribbons is synthesized by a facile method.•A surface contact prelithiation is used to improve the initial coulombic efficiency.•The prelithiated Si/GONRs-0.4 exhibits high ICE of 97.1% and splendid cycle stability.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2020.06.091