"Nanoskeleton" Si-SiO/C Anodes toward Highly Stable Lithium-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Silicon anodes offer high theoretical capacity for lithium-ion batteries but suffer from poor cycling stability due to significant volume expansion and fragile solid-electrolyte interphase (SEI) layer formation.
• This instability leads to side reactions, electrolyte consumption, and capacity fading, limiting practical applications.

Purpose of the Study:

• To design a robust carbon nanotube (CNT) supported

Main Methods:

• A
• The structure was characterized using electron microscopy and electrochemical techniques.
• Performance was evaluated in half-cells and NMC111 full cells.

Main Results:

• The CNT
• The optimal anode demonstrated a high reversible capacity of 918 mAh·g^-1 at 200 mA·g^-1 with 74% capacity retention after 300 cycles.
• The NMC111 full cell retained 71 mAh·g^-1 after 500 cycles (72% retention) at 100 mA·g^-1.

Conclusions:

• The CNT
• This approach offers a promising strategy for developing high-performance and stable silicon-based anodes for next-generation lithium-ion batteries.