Efficient Production of Graphene through a Partially Frozen Suspension Exfoliation Process: An Insight into the Enhanced Interaction Based on Solid-Solid Interfaces.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39453728.
- Also identified by DOI 10.1021/acs.nanolett.4c04329.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Liquid phase exfoliation (LPE) offers a promising path for scalable graphene production, but struggles with high energy consumption and low yield, with over 99.99% of the input energy wasted. Here, we present an energy-efficient approach for producing graphene via partially frozen-suspension exfoliation (PFE). As opposed to traditional liquid-solid interfaces, the solid-solid interface enhances shear strength between the frozen solvent and graphite from about 40 N m<sup>-2</sup> to 10<sup>5</sup> N m<sup>-2</sup>. Additionally, the suspension flow transitions from turbulent to laminar, aligning graphite parallel to the flow direction and conducive to the effective utilization of shear force. Compared to conventional liquid-phase exfoliation (LPE), PFE improves energy efficiency by 10<sup>2</sup>∼10<sup>3</sup> times. Furthermore, a production rate of 5 g h<sup>-1</sup> has been achieved in a 10 L tank at an ultralow shear rate of 3 × 10<sup>2</sup> s<sup>-1</sup>.