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Updated: Feb 7, 2026
10:23
Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
Published on: November 5, 2015
14.5K
Stacking-Controlled Assembly of Cabbage-Like Graphene Microsphere for Charge Storage Applications
Sun Kyung Kim1, Byeongyong Lee2, Taehyeong Ha1,3
1Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources, Daejeon, 34132, South Korea.
Small (Weinheim an Der Bergstrasse, Germany)
|August 4, 2018
Summary
Researchers developed high-density graphene microspheres for energy storage. This novel approach enhances both volumetric and gravimetric performance in supercapacitors and lithium-ion capacitors.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Low density of nanostructured graphene limits volumetric performance in energy storage devices.
- Developing high-density graphene materials is crucial for advanced energy storage solutions.
Purpose of the Study:
- To create high-density graphene agglomerates with improved volumetric performance.
- To investigate the microstructure-property relationship of the synthesized graphene for energy storage.
Main Methods:
- Combined liquid-phase mild reduction of graphene oxide with continuous aerosol densification.
- Fabricated cabbage-like graphene microspheres with a high density of 0.75 g cm⁻³.
Main Results:
- Achieved high gravimetric capacitance (177 F g⁻¹) and volumetric capacitance (117 F cm⁻³) in supercapacitors.
- Demonstrated a reversible capacity of ≈176 mAh g⁻¹ as a cathode for lithium-ion capacitors.
- The synthesized material exhibits a high surface area and narrow-ranged mesopores despite its high density.
Conclusions:
- The stacking-control approach enables tailored graphene microstructures for enhanced charge storage.
- High-density graphene microspheres offer a promising pathway for high-performance energy storage applications.
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