AI Article Synopsis
- Aqueous zinc-iodine batteries offer high energy density and low cost for large-scale energy storage, but face challenges like zinc dendrites and anode corrosion.
- The study discusses the creation of 2D tungsten boride nanosheets that improve the zinc deposition process while minimizing side reactions, leading to more stable battery performance.
- The tungsten boride-based cathodes show remarkable durability, maintaining stability after 5000 cycles at 50°C, making them promising for practical use in energy storage systems.
Article Abstract
Aqueous zinc-iodine batteries are promising candidates for large-scale energy storage due to their high energy density and low cost. However, their development is hindered by several drawbacks, including zinc dendrites, anode corrosion, and the shuttle of polyiodides. Here, the design of 2D-shaped tungsten boride nanosheets with abundant borophene subunits-based active sites is reported to guide the (002) plane-dominated deposition of zinc while suppressing side reactions, which facilitates interfacial nucleation and uniform growth of zinc. Meanwhile, the interfacial d-band orbits of tungsten sites can further enhance the anchoring of polyiodides on the surface, to promote the electrocatalytic redox conversion of iodine. The resulting tungsten boride-based I cathodes in zinc-iodine cells exhibit impressive cyclic stability after 5000 cycles at 50 C, which accelerates the practical applications of zinc-iodine batteries.
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| http://dx.doi.org/10.1002/smll.202402527 | DOI Listing |
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