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Free-Standing Copper Nanowire Network Current Collector for Improving Lithium Anode Performance
Lei-Lei Lu1, Jin Ge1, Jun-Nan Yang1
1Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, CAS Center for Excellence in Nanoscience, Department of Chemistry, University of Science and Technology of China , 96 Jinzhai Road, Hefei, Anhui 230026, China.
Researchers developed a copper nanowire (CuNW) network to prevent lithium dendrite growth in lithium metal batteries. This innovation improves battery safety and performance, enabling the use of lithium metal anodes in next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium metal anodes offer high capacity but suffer from dendrite growth, limiting battery performance and safety.
- Dendritic and mossy lithium formation are key challenges hindering lithium metal battery applications.
Purpose of the Study:
- To design a free-standing copper nanowire (CuNW) network as a current collector.
- To suppress dendritic lithium growth by accommodating lithium within 3D nanostructures.
- To enhance the cycling performance and safety of lithium metal anodes.
Main Methods:
- Fabrication of a free-standing CuNW network current collector.
- Lithium metal plating within the 3D CuNW nanostructure.
- Electrochemical testing to evaluate cycling performance and Coulombic efficiency.
Main Results:
- Successfully plated 7.5 mA h cm(-2) of lithium without dendrite formation.
- Achieved high average Coulombic efficiency of 98.6% over 200 cycles.
- Demonstrated outstanding rate performance due to suppressed dendrite growth and high conductivity.
Conclusions:
- Rational nanostructural design of current collectors is a promising strategy for lithium metal anodes.
- CuNW network effectively suppresses lithium dendrite growth, enhancing battery safety and performance.
- This approach facilitates the application of lithium metal anodes in next-generation batteries.
