<i>In Situ</i> Fluorinated Layer Enables a High-Performance Shape-Memory Zn-I<sub>2</sub> Battery.
basic_science · Level V
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- Record sourced from PubMed, PMID 41557939.
- Also identified by DOI 10.1021/acs.nanolett.5c05197.
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Abstract
Despite the considerable promise of flexible Zn-I<sub>2</sub> batteries for next-generation electronics, their development remains constrained by the polyiodide shuttle effect that severely compromises electrochemical stability and a lack of intrinsic shape adaptability. To address these challenges, this study successfully constructs a Zn-I<sub>2</sub> battery with both high electrochemical stability and excellent shape-memory functionality through the approach of "shape-memory skeleton, corrosion-resistant coating, and fibrous architecture". The <i>in situ</i> formed inert fluorinated coating (FeF<sub>2</sub>/ZnF<sub>2</sub>) shows a good barrier effect for polyiodides, and the fiber Zn-I<sub>2</sub> battery demonstrates high electrochemical stability, maintaining a capacity retention of over 96% after 250 cycles. Furthermore, due to the excellent shape-memory effect of the NiTi skeleton, combined with the flexibility of the fibrous structure, the battery achieves rapid (within 2 s) and stable (recovery rate above 70%) shape restoration. This work facilitates the development of flexible and shape-memory batteries.