As novel “post lithium-ion batteries” and promising alternatives to lithium-ion batteries (LIBs) suffering a storage limit of Li source, sodium-ion batteries (SIBs) are emerging and show bright prospect in large-scale...
electrides, characterized by excess interstitial anionic electron (IAE) in a crystalline 2D material, offer promising opportunities for the development of electrode materials, in particular in rechargeable metal-ion batteries applications. Although a few such potential electride materials have been reported, they generally show low metal-ion storage capacity, and the effect of IAE on the ion storage performance remains elusive so far. Here we report a novel 2D electride, [Sc 3 Si 2 ] 1+ •1e − , with fascinating IAE-driven high alkali metal-ion storage capacity. In particular, its K-ion specific capacity can reach up to 1497 mA h g −1 , higher than any previously reported 2D materials-based anodes in K-ion batteries (PIBs). The IAE in the [Sc 3 Si 2 ] 1+ •1e − crystal accounts for such high capacity behavior, which can drift away and balance the charge on the metal-cation, playing a crucial role in stabilizing the metal-ion adsorption and enhancing multilayer-ions adsorption. This proposed IAE-driven storage mechanism provides an unprecedented avenue for the future design of high storage capacity electrode materials.
The discovery of ferromagnetism in monolayer transition metal halides exemplified by CrI3 has opened a new venue in the field of two-dimensional (2D) magnetic materials, and more such 2D materials...
For humans, ultraviolet (UV) light from sun is harmful to our eyes and eye-related cells. This detrimental fact requires scientists to search for a material that can efficiently absorb UV...
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