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- W4324304711 abstract "Sodium-ion batteries (SIBs) as economic candidates have received considerable attention for large-scale energy storage applications. However, crystalline metal compounds with specific transport routes and rigid structures restrict their practical applications. Herein, the atomically dispersed N-rich amorphous WN clusters confined in the carbon nanosheets (WN/CNSs) are reported. Through advanced tests and calculations, the structural advantages, reaction mechanisms, and kinetic behaviors of the clusters are systematically analyzed. Compared with the crystalline W2 N with low theoretical capacity (only 209.3 mAh g-1 ), the amorphous WN clusters have the advantages of atomic disorders and non-grain boundaries and can afford abundant active sites (unsaturated dangling bonds) and isotropic charge transfer channels, which can be further enhanced by the N-rich characteristics and high electronegativity of the clusters. The encapsulation of CNSs has high conductivity and structural stability, which promotes electron transfer and effectively buffers volume expansions. As a SIB anode, the reversible capacity of WN/CNSs reaches 421.2 mAh g-1 at 0.1 A g-1 . Even at 20 A g-1 , the reversible capacity of 170.7 mAh g-1 is maintained after 8000 cycles. This study focuses on the advantages of amorphous nitrides, which have important guiding significance for the design of atomic clusters for high-performance metal ion batteries." @default.
- W4324304711 created "2023-03-16" @default.
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- W4324304711 date "2023-03-15" @default.
- W4324304711 modified "2023-10-16" @default.
- W4324304711 title "Nitrogen‐Rich WN Clusters with Atomic Disorders and Non‐Grain Boundaries Confined in Carbon Nanosheets Boosting Sodium‐Ion Storage" @default.
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- W4324304711 doi "https://doi.org/10.1002/smll.202300619" @default.
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