Ultrasound-assisted Li/Na co-intercalated exfoliation of graphite into few-layer graphene.

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ID: 102974
2020
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Abstract
In this work, we developed a novel approach for few-layer graphene by employing Li/Na co-intercalated exfoliation assisted by ultrasound method. The experiments were conducted under the ultrasonic power of 300 W and the frequency of 40 kHz without the participation of any organic solvent. The effect of Li/Na proportion on the exfoliation of graphite was intensively investigated. The structure and morphology of the as-exfoliated graphene nanosheets (UGN) was determined by a series of characterizations. The results showed that the thicknesses of the as-exfoliated graphene nanosheets were about 2.38-2.56 nm (about 7-8 layers) at the optimal Li/Na ratio. The potential application of the as-exfoliated graphene nanosheets as additive in grease was evaluated by four-ball friction tester. The results demonstrated that the antifriction and antiwear performances of the grease with 0.06 wt% graphene were significantly improved by 21.35% and 30.32% relative to pure grease, respectively. The friction mechanism was proposed by detecting the worn surfaces.
Reference Key
cheng2020ultrasoundassistedultrasonics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Cheng, Zhi-Lin;Kong, Ying-Chao;Fan, Lei;Liu, Zan;
Journal ultrasonics sonochemistry
Year 2020
DOI
S1350-4177(19)31508-1
URL
Keywords
ultrasound nanosheets graphene exfoliation anti-friction

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