Carbonized-leaf Membrane with Anisotropic Surfaces for Sodium-ion Battery

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Developing sustainable and high-performance anode materials is crucial for rechargeable sodium-ion batteries (SIBs).
• Current anode materials often require complex synthesis or expensive components, hindering large-scale applications.

Purpose of the Study:

• To develop a simple, cost-effective, and scalable method for producing carbon anode materials for SIBs.
• To evaluate the electrochemical performance of leaf-derived carbon membranes as binder-free anodes.

Main Methods:

• A one-step thermal pyrolysis technique was employed to convert natural leaves into carbon membranes.
• The structural and morphological properties of the carbon membranes were characterized.
• Electrochemical performance was assessed using coin cells for SIBs.

Main Results:

• The carbonized leaf membranes exhibited anisotropic surfaces and hierarchical porosity.
• The material demonstrated a high specific capacity of 360 mAh/g and an initial Coulombic efficiency of 74.8%.
• Large-area, low-resistance carbon membranes were successfully fabricated.

Conclusions:

• Natural leaves can be transformed into efficient, binder-free anodes for sodium-ion batteries via a simple pyrolysis method.
• The developed carbon membranes show significant potential for scalable and sustainable SIB development.