Abstract
Graphene aerogel (GA), with low density, high conductivity, and good mechanical properties, has important application potentials in the field of flexible electronics. Here, a balanced approach was developed in this work: Graphene oxide (GO) nanosheets were induced to assemble into a homogeneous porous hydrogel under alkali induction, and then, the oxygen-containing functional groups of GO were removed by reductant of formamidine sulfonic acid (FAS). Besides, the hydrogel of GA precursor can be quickly dried at a high temperature (150 °C) within 30 min to obtain pure GA of FGA. After further calcination, the obtained aerogel of AFGA with ordered structure has ultralow density (3.88 mg/cm3), high conductivity (7.4 S/m), supercompression recovery performance (99%), high sensitivity (S = 0.83 kPa−1), large reversible compression cycle performance (200 cycles under 90% strain), and high fatigue resistance (10,000 cycles under 70% strain), which presents excellent piezoresistive properties and can find wide applications in piezoresistive sensors as the high-performance sensing material.
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This work was funded by the National Natural Science Foundation of China (No. 51975562) and the National Basic Research Program of China (JCKY2019130C105).
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Yang, G., Qin, X., Chen, T. et al. Ultralight, superelastic pure graphene aerogel for piezoresistive sensing application. J Mater Sci 58, 850–863 (2023). https://doi.org/10.1007/s10853-022-08113-8
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DOI: https://doi.org/10.1007/s10853-022-08113-8