Process regulation of the electrochemical exfoliation for graphene production with graphite powder as starting materials

Mei, Jing; Qiu, Zhian; Gao, Teng; Wu, Qiang; Liu, Kui; Huang, Youguo; Zheng, Fenghua; Jiang, Juantao; Wang, Shaoyi; Li, Qingyu

doi:10.1007/s10853-023-08601-5

Cited by 2 publications

(1 citation statement)

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“…Electrochemical exfoliation is a burgeoning method for graphene production by inserting electrolyte anions or cations into graphite layers driven by an electric field to overcome the van der Waals forces between the graphite layers. , This method can ensure the hydrophilicity of graphene and avoid the introduction of too many oxygen-containing functional groups, resulting in less destruction of the sp 2 structure of graphene and a higher degree of intrinsic structure . In practical production, expanded graphite sheets will inevitably coexist as a by-product with graphene in the exfoliated mixture.…”

Section: Introductionmentioning

confidence: 99%

Superior Instant Heating and Electrothermal Performances of Interconnected Graphene-Expanded Graphite-Based Electric Heating Composite

Han,

Zhang,

Mei

et al. 2024

ACS Appl. Nano Mater.

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Electric heating composites play an important role in the rapid temperature response and electric-thermal conversion of instant electric heating tubes. However, the preparation of an electric heating composite with superior electrothermal performance and high-power density for high-temperature applications above 300 °C remains a challenge. Herein, a high-temperature electric heating composite was prepared with continuous fluffy three-dimensional interconnected graphene-expanded graphite hybrid conductive fillers (GGCF). A maximum temperature of 310 °C and a high heating rate of 450 °C•min −1 can be obtained in the PI electric heating film along with a high electrothermal radiation conversion efficiency of 44% and electrothermal conversion efficiency of 0.27 W•°C −1 . The corresponding steady-state temperature is 5.1 and 12.7 times higher than those with equivalent alone rGO and alone GP, respectively. Furthermore, the final Al electric heating tube can heat the flowing water to 100 °C within 6 s at a typical water flow rate of 380 mL•min −1 and 2000 W. The 2 h continuous heating demonstrates long-term stability with a power fluctuation below 3%. 770 cycles of heating and cooling verify the excellent heat shock resistance and repeatability. The superior electrothermal performance, instant heating function, long-term stability, and high safety of this electric heating composite show great potential in electric heating fields.

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Section: Introductionmentioning

confidence: 99%