Graphitized Carbon Xerogels for Lithium-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Carbon xerogels are promising electrode materials for energy storage devices.
• Tuning the pore structure and graphitization degree influences electrochemical performance.
• Graphene oxide incorporation can modify carbonaceous structures.

Purpose of the Study:

• To investigate the effect of macropore size and graphitization on carbon xerogels as lithium-ion battery electrodes.
• To evaluate the impact of graphene oxide incorporation on the carbonaceous structure and electrochemical properties.
• To compare the performance of optimized carbon xerogels against commercial graphite electrodes.

Main Methods:

• Synthesis of carbon xerogels with varying macropore sizes and graphitization degrees.
• Incorporation of graphene oxide into the xerogel polymeric structure.
• Electrochemical evaluation of xerogel-based electrodes in lithium-ion batteries.
• Analysis of carbonaceous structure and graphitic phase using relevant characterization techniques.

Main Results:

• Pore structure significantly affects the graphitization degree of carbon xerogels.
• Graphene oxide addition altered the carbonaceous structure, increasing the graphitic phase.
• The hybrid graphene-carbon xerogel exhibited the highest capacity and stability over 100 cycles.
• Performance surpassed that of commercial graphite SLP50.

Conclusions:

• Optimized carbon xerogels, particularly hybrid graphene-carbon xerogels, demonstrate excellent potential as high-performance electrodes for lithium-ion batteries.
• The study highlights the critical role of pore structure and graphitization in determining electrode performance.
• Graphene oxide integration offers a viable strategy to enhance the electrochemical properties of carbon xerogels.