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- W4210836191 abstract "The performances of rechargeable batteries are strongly affected by the operating environmental temperature. In particular, low temperatures (e.g., ≤0 °C) are detrimental to efficient cell cycling. To circumvent this issue, we propose a few-layer Bi2Se3 (a topological insulator) as cathode material for Zn metal batteries. When the few-layer Bi2Se3 is used in combination with an anti-freeze hydrogel electrolyte, the capacity delivered by the cell at -20 °C and 1 A g-1 is 1.3 larger than the capacity at 25 °C for the same specific current. Also, at 0 °C the Zn | |few-layer Bi2Se3 cell shows capacity retention of 94.6% after 2000 cycles at 1 A g-1. This behaviour is related to the fact that the Zn-ion uptake in the few-layer Bi2Se3 is higher at low temperatures, e.g., almost four Zn2+ at 25 °C and six Zn2+ at -20 °C. We demonstrate that the unusual performance improvements at low temperatures are only achievable with the few-layer Bi2Se3 rather than bulk Bi2Se3. We also show that the favourable low-temperature conductivity and ion diffusion capability of few-layer Bi2Se3 are linked with the presence of topological surface states and weaker lattice vibrations, respectively." @default.
- W4210836191 created "2022-02-09" @default.
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- W4210836191 date "2022-02-08" @default.
- W4210836191 modified "2023-10-14" @default.
- W4210836191 title "Few-layer bismuth selenide cathode for low-temperature quasi-solid-state aqueous zinc metal batteries" @default.
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- W4210836191 doi "https://doi.org/10.1038/s41467-022-28380-y" @default.
- W4210836191 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35136082" @default.
- W4210836191 hasPublicationYear "2022" @default.
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