Na metal is considered as one of the most promising anode materials for Na batteries due to its low cost, high theoretical specific capacity and low electrochemical potential. However, Na metal anode has poor reversibility and thereare safety issues of dendritic growth of Na, which hinder its further application. In this study, we demonstrate that carbon fibre paper (CFP), as the 3D current collector, suppresses the growth of dendrite and improves the coulombic efficiency and the voltage hysteresis during long-term cycling due to the good Na affinity with carbon and the 3D conductive scaffold structure. Moreover, full battery is assembled with a Prussian blue cathode and CFP@Na anode. The superior performance of CFP@Na makes it a promising candidate for practical applications.

中文翻译：

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使用3D碳纤维支架实现稳定的Na金属阳极†

金属钠由于其低成本，高理论比容量和低电化学势而被认为是钠电池最有希望的负极材料之一。然而，金属钠阳极具有差的可逆性，并且存在钠的树枝状生长的安全性问题，这阻碍了其进一步应用。在这项研究中，我们证明了碳纤维纸（CFP）作为3D集电器，由于与碳和3D的良好的Na亲和力，在长期循环过程中，抑制了树枝状晶体的生长并改善了库仑效率和电压滞后。导电支架结构。此外，完整的电池由普鲁士蓝阴极和CFP @ Na阳极组装而成。CFP @ Na的卓越性能使其成为实际应用的有希望的候选者。