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Substrate Designs for Stable Potassium Metal Anodes
1Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
ACS Applied Energy Materials
|November 14, 2025
Summary
Substrate design stabilizes potassium metal anodes in batteries, overcoming issues like dendrite growth and capacity fading. This research explores five key strategies for improved performance and safety in potassium metal batteries (PMBs).
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Potassium metal batteries (PMBs) offer a sustainable, low-cost, high-energy storage solution.
- K metal anode instability, including dendritic growth and fragile SEIs, hinders PMB practical application and safety.
Purpose of the Study:
- To review recent advancements in substrate design for stabilizing K metal anodes.
- To analyze strategies for enhancing the stability and performance of PMBs.
Main Methods:
- Categorization of substrate design strategies: 3D hosts, heteroatom doping, nanoparticle incorporation, alloying seeds, and work function modulation.
- Integration of experimental and theoretical mechanistic insights.
- Performance comparison and evaluation of trade-offs.
Main Results:
- Five substrate design strategies effectively stabilize K metal anodes.
- Insights into deposition control, SEI stability, scalability, and cost trade-offs are provided.
- Mechanistic understanding of anode stabilization is advanced.
Conclusions:
- Advancements in structural, chemical, and electronic design are crucial for reliable PMBs.
- Addressing challenges like long-term cycling and cathode integration is key for commercialization.
- Stabilized K metal anodes pave the way for high-performance energy storage.
Keywords:
dendrite suppressionnucleation and depositionpotassium metal batteriesscalable anode designsubstrate engineeringMore Related Videos
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