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Zero-Strain Insertion Anode Material of Lithium-Ion Batteries
Zhenbang Li1, Fei Tian1, Yan Li1
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, 510275, China.
Small (Weinheim an Der Bergstrasse, Germany)
|October 31, 2022
Summary
Lithium aluminum oxide nanowires show promise for lithium-ion batteries. Carbon composites enhance their capacity and cycling stability through interfacial storage mechanisms.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Insertion-type anode materials are crucial for lithium-ion batteries but face capacity limitations.
- Lithium aluminum oxide (LiAl5O8) offers high theoretical capacity and good Li-ion diffusion but suffers from poor conductivity.
Purpose of the Study:
- To develop and investigate LiAl5O8 nanowires as an insertion anode material.
- To overcome the conductivity limitations of LiAl5O8 through carbon compositing.
Main Methods:
- Synthesis of LiAl5O8 nanowires.
- Fabrication of a LiAl5O8 and carbon composite with embedded nanosized particles.
- Electrochemical cycling and performance evaluation.
Main Results:
- The LiAl5O8 and carbon composite demonstrated a reversible capacity of 490.9 mAh g-1 at 1 A g-1.
- Capacity increased to 996.8 mAh g-1 after 1000 cycles, indicating excellent stability.
- An interfacial storage mechanism involving grain boundaries and C/LiAl5O8 interfaces was identified.
Conclusions:
- The developed LiAl5O8 carbon composite exhibits enhanced electrochemical performance for lithium-ion batteries.
- Interfacial storage mechanisms contribute significantly to the improved capacity and long-term stability.
- This composite represents a promising anode material for advanced energy storage applications.
