Nanostructure Sn/C Composite High-Performance Negative Electrode for Lithium Storage

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Tin-based nanocomposites are promising anode materials for lithium-ion batteries (LIBs) due to high theoretical capacities.
• Uniform dispersion of tin nanoparticles within a conductive carbon matrix is crucial for stable electrochemical performance.

Purpose of the Study:

• To develop a cost-effective and efficient method for synthesizing tin/carbon (Sn/C) nanocomposites.
• To evaluate the electrochemical performance of the synthesized Sn/C nanocomposite as a negative electrode material for LIBs.

Main Methods:

• A facile hydrothermal method was used to prepare the Sn/C nanocomposite.
• Nanoparticles of tin (Sn) were uniformly dispersed within a conductive carbon framework.
• Electrochemical performance was assessed through charge/discharge cycling and rate capability tests.

Main Results:

• The Sn/C nanocomposite exhibited a reversible capacity of 877 mAh/g at 0.1 A/g with 77% first cycle coulombic efficiency.
• A capacity of 668 mAh/g was maintained at 0.5 A/g after 100 cycles.
• Excellent rate capabilities were demonstrated, with capacities of 806, 697, 630, 516, and 354 mAh/g at current densities of 0.1, 0.25, 0.5, 0.75, and 1 A/g, respectively.

Conclusions:

• The uniform dispersion of Sn nanoparticles in the carbon matrix significantly enhances electrochemical performance.
• The developed Sn/C nanocomposite demonstrates potential as a next-generation negative electrode material for advanced lithium-ion batteries.
• The facile hydrothermal synthesis offers a scalable and low-cost route for producing high-performance battery materials.