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Resource-Efficient Electrodes with Metallized Woven-Glass-Grid Current Collectors for Lithium-Ion Batteries
Yen-Ming Li1,2, Mohammadjafar Momeni1, Huy Nguyen Dang Duc1
1Institute of Experimental Physics, TU Bergakademie Freiberg, Leipziger Str. 23, 09599, Saxony, Freiberg, Germany.
Chemsuschem
|October 30, 2024
Summary
Researchers developed novel, lightweight woven-glass-grid current collectors for lithium-ion batteries. This innovation significantly reduces material usage and enhances battery performance, paving the way for advanced energy storage solutions.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Current collectors in lithium-ion batteries are crucial for electrical conductivity but often add significant weight and cost.
- Traditional metal foils (copper and aluminum) are heavy and resource-intensive to produce.
Purpose of the Study:
- To introduce a novel class of resource-efficient, lightweight current collectors (CCs) for lithium-ion batteries.
- To demonstrate the fabrication process and performance benefits of these new CCs.
Main Methods:
- Development of woven-glass-grid current collectors using ultra-light multifilament glass threads.
- Application of a thin metal layer via a roll-to-roll physical vapor deposition process.
- Fabrication and testing of anodes, cathodes, and full cells in coin cell format.
Main Results:
- Achieved >90% savings in copper and aluminum, and >80% reduction in CC mass.
- Increased gravimetric capacity of anodes by 48% and cathodes by 14%.
- Full cells showed a 26% increase in capacity, leading to a 25% improvement in specific energy.
- Demonstrated excellent cycling stability (93% capacity retention over 300 cycles) and high Coulombic efficiency (>99.9%).
Conclusions:
- Woven-glass-grid current collectors offer a significant advancement in designing ultralight and high-performance components for lithium-ion batteries.
- This technology enables enhanced specific energy and opens possibilities for future battery designs, including beyond lithium-ion systems.
