Reduced graphene oxide paper electrode for lithium-ion cells - towards optimized thermal reduction

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Graphene oxide paper is a promising material for energy storage devices.
• Further reduction is needed to optimize its electrical and electrochemical properties.

Purpose of the Study:

• To characterize free-standing reduced graphene oxide paper for potential use as an electrode material in lithium-ion cells.
• To investigate the effects of thermal reduction on the material's properties.

Main Methods:

• Mildly reduced graphene oxide paper underwent further thermal reduction.
• Structural and chemical properties were analyzed using Raman spectroscopy, Fourier-transform infrared spectroscopy, and elemental combustion analysis.
• Morphology, thickness, electrical conductivity, and electrochemical properties were evaluated.

Main Results:

• Thermal reduction at 800 °C yielded a material with conductivity of approximately 70 S/cm.
• The material exhibited a discharge capacity of approximately 160 mAh/g at a current density of 100 mA/g.
• Characterization confirmed the structural, chemical, and morphological changes after reduction.

Conclusions:

• The thermally reduced graphene oxide paper demonstrates significant potential as an electrode material for lithium-ion cells.
• Optimized reduction conditions enhance electrical conductivity and electrochemical performance.
• This material offers a viable pathway for developing advanced energy storage solutions.