Effect of combination methods for nanosilicon and graphite composites on the anode performance of lithium batteries

Ni, Chengyuan; Xia, Chengdong; Liu, Wenping; Shan, Zhiqiang; Lei, Xiaoxu; Qin, Haiqing; Wang, Xu

doi:10.1007/s10854-023-10830-y

Cited by 1 publication

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“…Graphite-loaded carbon-coated nanosilicon and carbon-coated graphite 460 mAh/g 89.8% [31] Si/G composites (graphite mixed with silicon nanoparticles) 703.8 mAh/g 84.95% [32] (Si/G)@C composites (graphite mixed with silicon nanoparticles and coated with sucrose-cracked carbon) 644.3 mAh/g 88.93% [32] (Si/graphite/graphene)@C 860.4 mAh/g 90.9%…”

Section: Initial Columbic Efficiency Referencementioning

confidence: 99%

Effect of Graphene on the Performance of Silicon–Carbon Composite Anode Materials for Lithium-Ion Batteries

Ni,

Xia,

Liu

et al. 2024

Materials

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(Si/graphite)@C and (Si/graphite/graphene)@C were synthesized by coating asphalt-cracked carbon on the surface of a Si-based precursor by spray drying, followed by heat treatment at 1000 °C under vacuum for 2h. The impact of graphene on the performance of silicon–carbon composite-based anode materials for lithium-ion batteries (LIBs) was investigated. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) images of (Si/graphite/graphene)@C showed that the nano-Si and graphene particles were dispersed on the surface of graphite, and thermogravimetric analysis (TGA) curves indicated that the content of silicon in the (Si/graphite/graphene)@C was 18.91%. More bituminous cracking carbon formed on the surface of the (Si/graphite/graphene)@C due to the large specific surface area of graphene. (Si/Graphite/Graphene)@C delivered first discharge and charge capacities of 860.4 and 782.1 mAh/g, respectively, initial coulombic efficiency (ICE) of 90.9%, and capacity retention of 74.5% after 200 cycles. The addition of graphene effectively improved the cycling performance of the Si-based anode materials, which can be attributed to the reduction of electrochemical polarization due to the good structural stability and high conductivity of graphene.

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Section: Initial Columbic Efficiency Referencementioning

confidence: 99%