One-Dimensional Croconate-Based Fe-CP as a High-Performance Anode Material for Lithium-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Coordination polymers (CPs) are increasingly recognized for their potential as electrode materials in lithium-ion batteries (LIBs) due to their structural diversity.
• Developing efficient and stable anode materials is crucial for advancing rechargeable LIB technology.

Purpose of the Study:

• To introduce a croconate-based one-dimensional coordination polymer, [Fe(C5O5)(H2O)3]n (Fe-CP), as a high-performance anode material for LIBs.
• To investigate the electrochemical properties, including capacity, rate capability, and cycling stability, of the Fe-CP anode.

Main Methods:

• Synthesis and characterization of the one-dimensional Fe-CP material.
• Electrochemical testing of the Fe-CP as an anode in LIBs, including galvanostatic charge-discharge cycling and rate performance evaluation.
• Analysis of the material's structural features and their influence on lithium-ion diffusion.

Main Results:

• The Fe-CP anode exhibited a specific capacity of 521 mA h g⁻¹ at 100 mA g⁻¹ over 140 cycles within a voltage range of 0.01–2.4 V.
• The material demonstrated remarkable stability in the electrolyte, high capacity, high-rate capability, and excellent cycling performance.
• The unique chain-based structure with unrestricted channels facilitated efficient lithium-ion diffusion, and the anode regained its initial capability after high-rate cycling.

Conclusions:

• The croconate-based Fe-CP is a promising, high-performance anode material for rechargeable LIBs.
• Its unique one-dimensional structure contributes to enhanced electrochemical properties and stability.
• Fe-CP offers a viable alternative to existing anode materials for advanced energy storage applications.