Lithium Storage Behavior of Expanded Microcrystalline Graphite/Fe₂O₃ Anode for Lithium-Ion Batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Growing demand for high-performance lithium-ion batteries in electric vehicles and portable electronics.
• Need for advanced anode materials to improve energy storage capacity and cycle life.
• Limitations of current anode materials in terms of stability and energy density.

Purpose of the Study:

• To develop novel high-performance anode materials for lithium-ion batteries.
• To synthesize and characterize expanded microcrystalline graphite/Fe2O3 (EMG/Fe2O3) composites.
• To investigate the electrochemical performance and synergistic mechanisms of EMG/Fe2O3 composites for lithium storage.

Main Methods:

• Simple synthesis strategy for introducing Fe2O3 nanoparticles onto an expanded microcrystalline graphite (EMG) matrix.
• Systematic investigation of electrochemical performance at different doping ratios.
• Analysis of lithium storage capacity, cycle stability, and capacity retention.

Main Results:

• EMG/Fe2O3-2 composite demonstrated superior lithium storage performance.
• Initial discharge specific capacity of 1114.10 mAh·g-1.
• Capacity retention of 90.39% after 100 cycles (1007.05 mAh·g-1).

Conclusions:

• The porous EMG structure effectively buffers Fe2O3 volume expansion and enhances conductivity.
• Synergistic effects between EMG and Fe2O3 nanoparticles boost specific capacity.
• The study provides new strategies for advancing lithium-ion battery anode materials.