State Key Lab of Crystal Materials , Shandong University , Jinan 250100 , China.
School of Materials Science and Engineering , Shandong Jianzhu University , Jinan 250100 , China.
ACS Appl Mater Interfaces. 2018 Jun 13;10(23):19588-19597. doi: 10.1021/acsami.8b02317. Epub 2018 May 29.
Band gap-tunable porous borocarbonitride (BCN) nanosheets were successfully fabricated with cheap and readily available precursors by annealing and exfoliating. The band gap of the as-prepared BCN materials ranges from 5.5 to 1.0 eV; these samples exhibit beneficial structural features suitable for the application in supercapacitors. Especially, the BCN material with a band gap of 1.0 eV exhibits a great specific surface area (600.9 m g), massive active sites, and excellent conductivity (10.8 S m). In addition, this example displays great specific capacitance (464.5 F g), excellent cycle stability (98.5% performance retention after 10 000 cycles), and ultrahigh energy density (50.4 W h kg, in 1 M EtNBF electrolyte). This excellent electrochemical performance and facile effective synthesis of band gap-tunable BCN materials will provide a promising strategy for configuring nanostructured multiple compound electrodes for other energy storage and conversion devices.
通过退火和剥离，成功地用廉价易得的前驱体制备了带隙可调的多孔硼碳氮化物（BCN）纳米片。所制备的 BCN 材料的带隙范围为 5.5 至 1.0eV；这些样品具有有益的结构特征，适用于超级电容器的应用。特别是带隙为 1.0eV 的 BCN 材料具有大的比表面积（600.9m^2g^-1）、大量的活性位点和优异的导电性（10.8S m^-1）。此外，该实例表现出高比电容（464.5F g^-1）、优异的循环稳定性（在 10000 次循环后保留 98.5%的性能）和超高的能量密度（50.4W h kg^-1，在 1M EtNBF 电解质中）。这种出色的电化学性能和带隙可调 BCN 材料的简便有效合成，为配置用于其他储能和转换器件的纳米结构多相复合电极提供了一种很有前途的策略。
