A facile method to prepare highly compressible three-dimensional graphene-only sponge
Publication in refereed journal

香港中文大學研究人員

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摘要Endowing graphene sponge with compressibility and conductivity offers the possibility to regenerate piezoresistivity and is therefore of great interest in the field of sensors. In this work, highly compressible three-dimensional graphene-only sponge (CGS) was prepared through a facile method by using ammonium sulfide and ammonia solutions under mild conditions. The morphologies and microstructures of the as-prepared CGSs can be controlled by adjusting the mass ratio of graphene oxide (GO) to ammonium sulfide which changed from a metallic sheen bulk with a leaf-shaped structure to a black sponge with a porous structure. Besides, by simply changing the concentrations of GO, CGSs with different porosity, conductivity as well as mechanical strength were obtained. Moreover, the resultant CGSs show ultralow density (as low as 4.9 mg cm(-3)), high porosity (as much as 99.8%), great compressibility (as much as the strain of 80%), and excellent stability (100 cycles) during compression. Furthermore, the sensitive variation of electrical resistance and cycle stability was validated under the compressive strain of 50% which make CGSs great candidates for pressure-responsive sensors, elastic conductors and other applications.
著者Li JH, Zhao SF, Zhang GP, Gao YJ, Deng LB, Sun R, Wong CP
期刊名稱Journal of Materials Chemistry A
出版年份2015
卷號3
期次30
出版社ROYAL SOC CHEMISTRY
頁次15482 - 15488
國際標準期刊號2050-7488
電子國際標準期刊號2050-7496
語言英式英語
Web of Science 學科類別Chemistry; Chemistry, Physical; Energy & Fuels; Materials Science; Materials Science, Multidisciplinary

上次更新時間 2020-18-09 於 02:11