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- W4361296469 abstract "Layered materials are among the most promising anode candidates for sodium-ion batteries, but suffer from limited interplanar spacing and poor electrical conductivity, resulting in unsatisfactory electrochemical performance. Herein, a novel layered composite of Zn2SiO4 and carbon (Zn2SiO4/C) is designed by a simple one-pot hydrothermal intercalation strategy. The Zn2SiO4/C shows unique superlattice-like lamellar configuring that the Zn2SiO4 layers and graphene-like carbon layers are alternately stacked, forming a sandwich-type structure. Such alternating layered contexture endows Zn2SiO4/C with improved conductivity and stability. In addition, the interplanar spacing of the Zn2SiO4/C achieves 1.44 nm, larger than most state-of-the-art layered materials, allowing the fast ion transfer from bulk electrolyte to the inner surface. As such, the Zn2SiO4/C delivers a high reversible Na storage capacity of 374 mAh g−1, and it presents no visible capacity decline during the cycling test. More importantly, even under a very high current density of 20 A g−1, the capacity remains 180 mAh g−1, suggesting an ultrafast energy output within 33 s (≈109 C). The ex-situ studies show that Na storage of Zn2SiO4 obeys a conversion−alloying mechanism, in which it is reduced to Zn, followed by the formation of NaxZn alloy." @default.
- W4361296469 created "2023-03-31" @default.
- W4361296469 date "2023-05-01" @default.
- W4361296469 modified "2023-09-23" @default.
- W4361296469 title "Future SI" @default.
- W4361296469 doi "https://doi.org/10.1016/s0013-4686(23)00487-5" @default.
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