Spinning of Carbon Nanofiber/Ni–Cu–S Composite Nanofibers for Supercapacitor Negative Electrodes

Qiong Li, Yu Wang, Ganghui Wei, Xiaorong Fang, Ni Lan, Yonggang Zhao, Qiming Liu (), Shumei Lin () and Deyan He
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Qiong Li: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Yu Wang: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Ganghui Wei: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Xiaorong Fang: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Ni Lan: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Yonggang Zhao: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Qiming Liu: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China
Shumei Lin: College of Electronic Engineering, Lanzhou City University, Lanzhou 730000, China
Deyan He: School of Materials and Energy, Lanzhou University, Lanzhou 730000, China

Energies, 2024, vol. 17, issue 6, 1-15

Abstract: The preparation of composite carbon nanomaterials is one of the methods for improving the electrochemical performance of carbon-based electrode materials for supercapacitors. However, traditional preparation methods are complicated and time-consuming, and the binder also leads to an increase in impedance and a decrease in specific capacitance. Therefore, in this work, we reduced Ni-Cu nanoparticles on the surface of nitrogen-doped carbon nanofibers (CNFs) by employing an electrostatic spinning method combined with pre-oxidation and annealing treatments. At the same time, Ni-Cu nanoparticles were vulcanized to Ni–Cu–S nanoparticles without destroying the structure of the CNFs. The area-specific capacitance of the CNFs/Ni–Cu–S–300 electrode reaches 1208 mF cm −2 at a current density of 1 mA cm −2 , and the electrode has a good cycling stability with a capacitance retention rate of 76.5% after 5000 cycles. As a self-supporting electrode, this electrode can avoid the problem of the poor adhesion of electrode materials and the low utilization of active materials due to the inactivity of the binder and conductive agent in conventional collector electrodes, so it has excellent potential for application.

Keywords: supercapacitors; electrostatic spinning; nitrogen-doped carbon nanofibers; electrochemical properties; nanocomposites (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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