Durable integrated K‐metal anode with enhanced mass transport through potassiphilic porous interconnected mediator
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Date
2023-06-15
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract
K‐metal batteries have become one of the promising candidates for the large‐scale energy storage owing to the virtually inexhaustible and widely potassium resources. The uneven K+ deposition and dendrite growth on the anode causes the batteries prematurely failure to limit the further application. An integrated K‐metal anode is constructed by cold‐rolling K metal with a potassiphilic porous interconnected mediator. Based on the experimental results and theoretical calculations, it demonstrates that the potassiphilic porous interconnected mediator boosts the mass transportation of K‐metal anode by the K affinity enhancement, which decreases the concentration polarization and makes a dendrite‐free K‐metal anode interface. The interconnected porous structure mitigates the internal stress generated during repetitive deposition/stripping, enabling minimized the generation of electrode collapse. As a result, a durable K‐metal anode with excellent cycling ability of exceed 1, 000 h at 1 mA cm−2/1 mAh cm−2 and lower polarization voltage in carbonate electrolyte is obtained. This proposed integrated anode with fast K+ kinetics fabricated by a repeated cold rolling and folding process provides a new avenue for constructing a high‐performance dendrites‐free anode for K‐metal batteries. © 1999-2025 John Wiley & Sons, Inc or related companies.
Description
Keywords
Anodes, Mass transit systems, Porous materials, Energy storage, Energy storage systems, Kinetics, Folding Model, Electrolytes, Doped materials, Carbon, X-ray diffraction, Graphite
Citation
Zhao, L.-K., Gao, X.-W., Mu, J., Luo, W.-B., Liu, Z., Sun, Z., Gu, Q.-F., & Li, F. (2023). DDurable integrated K‐metal anode with enhanced mass transport through potassiphilic porous interconnected mediator. Advanced Functional Materials, 33(41), 2304292. doi:10.1002/adfm.202304292