Insight into the Self-Assembled Three-Dimensional Sandwich-Like Hollow Silicon Nanoarray/Graphene Lithium Storage Architecture by Sonication-Assisted Functionalization

Huang, Ruian; Guo, Yuzhong; Zhang, Zhengfu; Zhang, Xingshuai; Yang, Bin

doi:10.1021/acs.energyfuels.1c04334

Cited by 2 publications

(1 citation statement)

References 85 publications

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“…Additionally, rational structural designs to encapsulate the Si particles can effectively mitigate volume effects, such as the sandwich structure, , hollow structure, , and core–shell structure. , Among them, the core–shell structure is believed to build protective layers on the surface of Si particles, and coating layers with high strength, high toughness, and high conductivity can effectively alleviate the volume expansion of Si and build a stable SEI. For example, Yu et al .…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanofiber Cages and Interface Engineering Stabilizing Silicon-Based Anode for High-Performance Lithium-Ion Batteries

Yan,

Hu,

Xia

et al. 2023

ACS Appl. Energy Mater.

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Silicon (Si)-based anodes have emerged as a highly promising material for the next generation of lithium-ion batteries (LIBs) due to their numerous advantages. However, the practical application of Si-based anodes is currently hindered by various challenges, such as significant volume variation and limited electronic conductivity. Herein, silicon/carbon/carbon nanofiber (Si/C/ CNF) composites are prepared by using micron Si as the silicon source, carbon dioxide (CO 2 ) as the green carbon source, and Ni powder as the catalyst. The formation of CNFs originates from the Ni-catalyzed thermal reduction of CO 2 , while the released heat facilitates the formation of SiC and Ni 3 Si 2 interfaces on the surface of Si, resulting in Si/C/CNF composites with a unique structure. The dual interface of SiC and Ni 3 Si 2 can not only reduce the side reactions of Si but also effectively mitigate the volume expansion of Si. Meanwhile, the CNF cage grown in situ can improve the electrical conductivity of the composite and promote electron/ion transport. Consequently, the Si/C/CNF anode shows an impressive cycling stability and an excellent rate performance (1300 mA h g −1 at 4 A g −1 ). The full cell constructed with the Si/C/CNF anode and the LiFePO 4 cathode exhibits high capacity retention (95.8% capacity retention after 150 cycles at 0.2 C). This study provides a perspective for the preparation of next-generation Sibased anodes.

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