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- W2891419971 abstract "Abstract Metallic Sn exhibits high theoretical capacity and low operating voltage for Na+ storage, but it suffers from huge volume changes during Na+ insertion/extraction and from big experimental difficulties to achieve high areal capacities with mass loadings larger than 10 mg cm−2. Here we propose a facile and novel synthesis strategy towards hierarchically porous foams of Sn nanodots (3.2 nm) uniformly distributed in a three-dimensional sheet-like nitrogen-doped carbon (SNC) framework derived from a low-cost SnO2/polyacrylamide composite hydrogel. The resulting Sn@SNC foams effectively integrate the intriguing merits of the two building blocks, namely both Sn nanodots and SNC framework as active materials providing capacity and the SNC framework as a flexible buffer for the volume change, as an excellent conductor for electrons and as a spacer for the Sn nanodots suppressing aggregation. Moreover, the hierarchically porous structure of the Sn@SNC foam enables fast Na+ diffusion in thick electrodes, finally offering high-performance Na+ storage at high mass loadings of up to 20 mg cm–2 with a reversible areal capacity of 1.0 mA h cm−2 at 3 mA cm−2 over 700 cycles." @default.
- W2891419971 created "2018-09-27" @default.
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- W2891419971 date "2019-01-01" @default.
- W2891419971 modified "2023-10-01" @default.
- W2891419971 title "Hydrogel-derived foams of nitrogen-doped carbon loaded with Sn nanodots for high-mass-loading Na-ion storage" @default.
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- W2891419971 doi "https://doi.org/10.1016/j.ensm.2018.09.010" @default.
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