Electrospining Machine:Zhu Guang, Researcher, Beijing Institute of Nanoenergy, CAS, et al: N-doped porous carbon nanofibers loaded with Fe3C/Fe2O3 nanoparticles as high performance supercapacitor negative electrodes

Background

Recently, Zhu Guang, a researcher at the Institute of Nanoenergy, Chinese Academy of Sciences (BNES) in Beijing, and others have developed a high-performance anode material for supercapacitors by utilizing nitrogen-doped porous carbon-Nanofiber-supported Fe3C/Fe2O3 nanoparticles. The related research results were published under the title “N-Doped Porous Carbon-Nanofiber-Supported Fe3C/Fe2O3 Nanoparticles as Anode for High-Performance Supercapacitors “The research results were published in the journal Molecules.

The main points of this paper

1. Nitrogen-doped carbon nanofiber (NCNF)-loaded Fe3C/Fe2O3 nanoparticle (NCFCO) composites have been synthesized by carbonization and annealing of Electrospun Nanofbers containing iron sources.

2. In the hybridized structure, the porous carbon Electrospun Nanofbers were used as a substrate to provide fast electron and ion transfer for the Faraday reaction of Fe3C/Fe2O3 during the charge-discharge cycle.

3. The obtained NCFCO produces a high specific capacitance of 590.1 F g-1 at 2 A g-1, which is superior to that of NCNF-supported Fe3C nanoparticles (NCFC, 261.7 F g-1) and NCNFs/Fe2O3 (NCFO, 398.3 F g -1).

4. The asymmetric supercapacitor assembled using NCFCO negative electrode and activated carbon positive electrode provided a large energy density of 14.2 Wh kg-1 at 800 W kg-1. In addition, it exhibited an impressive capacitance retention of 96.7% even after 10,000 cycles.

How can Fe3C/Fe2O3 nanoparticles improve the performance of supercapacitors?

Fe3C/Fe2O3 nanoparticles enhanced the performance of supercapacitors through synergistic interaction with N-doped ECNFs, resulting in a significant enhancement of specific capacitance. The porous carbon Electrospun Nanofbers provided fast electron and ion transfer for the Faraday reaction of Fe3C/Fe2O3 during charge/discharge cycling with high specific capacitance and long-term cycling stability.

An asymmetric supercapacitor assembled using NCFCO anode and activated carbon cathode has an energy density of 14.2 Wh kg-1 at 800 W kg-1 and maintains a capacitance of 96.7% even after 10,000 cycles. With the advantages of high energy density, long cycle life, and environmental friendliness, this technology has potential applications in the fields of high-efficiency power supply, renewable energy storage, and portable electronic devices.

With the electrospimnimg system, the particles are mapped to each other and the efficiency is greatly improved.

Originallink: https://doi.org/10.3390/molecules2815575