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Synergistic Effects of a Multifunctional Graphene Based Interlayer on Electrochemical Behavior and Structural
Young-Woo Lee1, Geon-Hyoung An2, Byung-Sung Kim1
1Department of Engineering Science, University of Oxford , Oxford OX1 3PJ, U.K.
ACS Applied Materials & Interfaces
|June 21, 2016
Summary
Graphene grown on copper current collectors significantly enhances lithium ion battery anode performance. This interface engineering improves capacity, stability, and efficiency for better battery technology.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Interfacial engineering is crucial for optimizing lithium ion battery (LIB) performance.
- Limited research has focused on the physical interface between anode materials and current collectors.
Purpose of the Study:
- To engineer an ideal interfacial layer between anode materials and the copper current collector.
- To investigate the impact of a graphene interlayer on anode electrochemical performance.
Main Methods:
- Modified chemical vapor deposition (CVD) to grow graphene directly on a copper (Cu) current collector.
- Electrochemical testing of anodes with and without the graphene interlayer.
Main Results:
- The graphene-interlayered anode demonstrated a high reversible specific capacity (921.4 mAh g(-1) at 200 mA g(-1)).
- Achieved excellent Coulombic efficiency (approx. 96%) and superior cycling stability.
- Enhanced rate properties and capacity retention compared to bare Cu collectors.
Conclusions:
- Graphene interlayers improve interfacial stability and adhesion between anode and current collector.
- Graphene protects the Cu current collector from oxidation and corrosion.
- The engineered interface enhances electrical contact, leading to improved battery performance.
