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- W4200615460 abstract "• N-doped graphene wrapped Fe 3 N nanoparticles were firstly applied nano-shield for separator. • Fe 3 N@NG/PP has good electrolyte uptake and wettability to enable a favorable contact. • Fe 3 N@NG promotes Li ion migration and adjust the Li ion flux to inhibit Li dendrites growth. • Li // Li symmetric cell and Li // LPF full cell with Fe 3 N@NG/PP deliver superior performance. Lithium (Li) metal anode is of great importance for high-energy rechargeable batteries owing to its ultrahigh theoretical capacity. However, the Li dendrite growth during the repetitive charge/discharge process will impale the separator resulting in short-circuiting and serious safety issues. To effectively suppress Li dendrite growth, for the first time we present a novel lithiophilic interlayer on commercial PP separator, which is constructed by Fe 3 N nanoparticles embedded and wrapped in N-doped graphene nanosheets (Fe 3 N@NG). The Fe 3 N@NG functionalized separator displays excellent electrolyte wettability, high Li ionic conductivity and ion transference number, which function synergistically to suppress Li dendrite growth. Meanwhile, the DFT calculation demonstrates that there exists a stronger interaction between Li atoms and Fe 3 N@NG, which can provide the deposition sites, resulting in uniform and compact Li plating. Above ameliorating merits accompany an ultra-long-life of 2300 h at 5 mA cm −2 for the Li//Li symmetric cells with Fe 3 N@NG functionalized separators. Moreover, the Li//LFePO 4 full cell delivers superior long-term cyclic stability and ultralow capacity decay rate of 0.08%/cycle even at 2C. This work provides an innovative strategy to rationally design and new insights towards functional lithiophilic interlayer to efficiently suppress Li dendrite growth for Li metal batteries. A novel lithiophilic interlayer of N-doped graphene nanosheet wrapped Fe 3 N functionalized separator (Fe 3 N@NG/PP) was rationally designed and applied for Li metal batteries. The stronger interaction between Li atoms and Fe 3 N@NG can adjust Li ion and promote ion migration kinetics, which can result in stable Li plating/stripping, further mitigating the polarization and suppressing the Li dendrite growth. This work provides new insights into developing high-performance Li metals batteries." @default.
- W4200615460 created "2021-12-31" @default.
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- W4200615460 date "2022-03-01" @default.
- W4200615460 modified "2023-10-06" @default.
- W4200615460 title "Fe3N@N-doped graphene as a lithiophilic interlayer for highly stable lithium metal batteries" @default.
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- W4200615460 doi "https://doi.org/10.1016/j.ensm.2021.12.010" @default.
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