论文成果
The precise building units modulation of iron-bismuth sulfide triple-level hierarchical structure for enhanced supercapacitor performance
- 发布时间：2024-12-23
- 点击次数：
- 关键字：ELECTRODE MATERIALS; ASYMMETRIC SUPERCAPACITOR; CARBON; NANOPARTICLES; GRAPHENE
- 摘要：The controllable synthesis of multi-level structure is still a challenge task because of the unpredictable and uncontrollable self-assemble process of building units. Herein, a series triple-level constructed by different building units (0D nanoparticle, 1D nanorod and 2D nanosheets) are successfully fabricated by a top-down synthesis strategy. During the vulcanization process of flower-like Fe/Bi-MOF (iron/bismuth metal organic framework) precursors, the growth rate of different crystal plane of (Fe/Bi)2S3 microcrystal can be adjusted by Fe:Bi ratios, and the dimension of the basic building units are gradually decreased from 2D nanosheets to 0D nanoparticles with the increasing of Fe content. The optimized FeBiS-50 % (Iron-bismuth sulfide with Fe:Bi molar ratio of 1:1) assembled by 1D nanorod basic units present rich channels and abundant volume space for rich accessible active center and fast mass transfer. Therefore, the optimized composite FeBiS-50 % possesses specific capacitance above 610 F g-1 at a current density of 1 A g-1. The as-prepared NCS (Ni3S2@Co3S4)//FeBiS-50 % asymmetric supercapacitor achieves an extraordinary energy density of 64 Wh kg-1 at a power density of 0.80 kW kg-1, and 80 % capacitance retention after 8000 cycles.
- 卷号：597
- 期号：
- 是否译文：否