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Corrosion-Resistant Shape-Programmable Zn-I2 Battery
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DOI：10.1002/aenm.202401321.png)
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摘要
En 中文
Zinc-iodine (Zn-I-2) batteries are promising, low-cost and safe aqueous rechargeable energy storage devices. An iodide shuttle-induced corrosion and poor zinc (Zn) stripping/plating often result in a limited battery lifetime, urges the development of multifunctional Zn anodes. To overcome these problems, here multifunctional Zn-anode is demonstrated with shape-programmability and uniform Zn morphology along low-indexed (002) crystal plane, achieved by electrodepositing Zn on nitinol alloy (nickel-titanium, NiTi). It is found that the surface oxide layer on NiTi supports the uniform Zn deposition with densely packed and planar film formation that leads high corrosion resistance, while adopts the shape-memory function. NiTi-based device achieves extremely steady performance, benefiting from uniform and planar Zn morphology during cycling, whereas the Zn-based device short-circuits due to dendritic development under severe iodide corrosion. It is also demonstrated a flat-shape-programmed flexible pouch cell Zn-I-2 battery (SP-ZIB), which performs well in bent mode, recovers its original flat shape at elevated temperature, and shows consistent performance for validated cycles. The shape-memory function of NiTi makes this Zn-I-2 battery advanced by flexibility and shape-programmable features. This study represents fresh insight for using smart materials as multifunctional features for the next-generation Zn-I-2 batteries.
Keyword:
corrosion-free zinc anode
shape-memory battery
smart materials
zinc deposition
zinc-iodine battery
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IF:
26
论文数:
1.0W
被引数:
15.7W
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引用论文
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