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- Title
Building electrode skins for ultra-stable potassium metal batteries.
- Authors
Ding, Hongbo; Wang, Jue; Zhou, Jiang; Wang, Chengxin; Lu, Bingan
- Abstract
In nature, the human body is a perfect self-organizing and self-repairing system, with the skin protecting the internal organs and tissues from external damages. In this work, inspired by the human skin, we design a metal electrode skin (MES) to protect the metal interface. MES can increase the flatness of electrode and uniform the electric field distribution, inhibiting the growth of dendrites. In detail, an artificial film made of fluorinated graphene oxide serves as the first protection layer. At molecular level, fluorine is released and in-situ formed a robust SEI as the second protection "skin" for metal anode. As a result, Cu@MES | | K asymmetric cell is able to achieve an unprecedented cycle life (over 1600 cycles). More impressively, the full cell of K@MES | | Prussian blue exhibits a long cycle lifespan over 5000 cycles. This work illustrates a mechanism for metal electrode protection and provides a strategy for the applying bionics in batteries. Metal potassium anodes show great potential in high energy density batteries. However, their practical application is hindered by the unstable nature of the highly active metal surface. Here, authors propose a "metal skin" approach that stabilizes the surface of the metal, resulting in improved cycle life of potassium metal anode-based batteries.
- Subjects
KILLER cells; METAL coating; SELF-organizing systems; METALS; PRUSSIAN blue; DENDRITIC crystals
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-38065-9