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In Situ Growth 3D GDY-NCNTs Nanocomposites for High-Performance Supercapacitors.

Enhao Xing1, Rongli Cui1, Xihong Guo1

  • 1CAS Key Laboratory for Biomedical Effects of Nanomaterial & Nanosafety, Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China.

ACS Applied Materials & Interfaces
|April 26, 2024
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Summary

New nitrogen-doped carbon nanotube composites (GDY-NCNTs) show enhanced specific capacitance and cycling stability due to their 3D porous structure and nitrogen doping, outperforming GDY-CNTs.

Keywords:
3D nanocompositecarbon nanotubegraphdiynein situ growthnitrogen dopingsupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Advanced carbon materials are crucial for energy storage applications.
  • Three-dimensional porous structures enhance electrochemical performance.
  • Nitrogen doping can improve the properties of carbon-based electrodes.

Purpose of the Study:

  • To synthesize and characterize novel binary carbon composites (GDY-NCNTs and GDY-CNTs) with a 3D porous structure.
  • To evaluate the electrochemical performance, specifically specific capacitance and cycling stability, of these composites.
  • To investigate the impact of nitrogen doping on the properties of the carbon composites.

Main Methods:

  • In situ growth method for synthesizing GDY-NCNTs and GDY-CNTs composites.
  • Electrochemical characterization including specific capacitance and cycling stability tests.
  • Analysis of the 3D porous structure and the effect of nitrogen doping.

Main Results:

  • GDY-NCNTs composites exhibited excellent specific capacitance (679 F g⁻¹ at 2 mV s⁻¹), a 139% increase compared to GDY-CNTs.
  • The composites demonstrated good cycling stability with up to 116% capacity retention after 10,000 cycles.
  • The 3D porous structure and nitrogen doping significantly improved ion transfer, surface area, and wettability.

Conclusions:

  • The 3D porous structure of GDY-NCNTs composites enhances ion transfer and specific surface area, boosting capacitance.
  • Nitrogen doping in GDY-NCNTs increases surface defects and electrochemical sites, improving performance and wettability.
  • These novel composites offer superior electrochemical performance for energy storage applications.