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Realizing dendrite-free lithium deposition with three-dimensional soft-rigid nanofiber interlayers
Huijuan Zhao1, Guodong Zhao1, Fengquan Liu1
1College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China.
Journal of Colloid and Interface Science
|April 9, 2024
Summary
Researchers developed a soft-rigid nanofiber interlayer to enable uniform lithium metal deposition. This strategy enhances solid electrolyte interface stability, improving battery lifespan and safety for high-energy-density applications.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium metal anodes offer high energy density due to low redox potential and high capacity.
- Challenges include lithium dendrite growth, volume changes, and unstable solid electrolyte interfaces (SEI), hindering commercialization.
Purpose of the Study:
- To develop a protective layer for lithium metal anodes.
- To improve lithium deposition uniformity and SEI stability.
- To enhance the safety and cycle life of high-energy-density batteries.
Main Methods:
- Fabrication of 3D nanofiber functional layers using electrospinning.
- Anchoring tin oxide (SnO2) onto polyvinylidene fluoride (PVDF) nanofibers.
- Direct electrospinning of the composite nanofibers onto a copper current collector.
Main Results:
- The soft-rigid nanofiber interlayers promoted uniform lithium deposition.
- Enhanced SEI stability was achieved through physical accommodation and chemical ionic intervention.
- Reduced lithium nucleation overpotential and stabilized SEI layer via SnO2 interaction with lithium.
Conclusions:
- The developed nanofiber interlayers effectively regulate lithium deposition and strengthen SEI.
- This approach offers a new strategy for protecting lithium metal anodes.
- Provides inspiration for developing advanced high-energy-density lithium metal batteries.
