Constructing potential anodes for sodium-ion batteries (SIBs) with a wide temperature property has captured enormous interests in recent years. Fe_1−xS, a zero-band gap material confirmed by density states calculation, is an ideal electrode for fast energy storage on account of its low cost and high theoretical capacity. Herein, Fe_1−xS nanosheet wrapped by nitrogen-doped carbon (Fe_1−xS@NC) is engineered through a post-sulfidation strategy using Fe-based metal-organic framework (Fe-MOF) as the precursor. The obtained Fe_1−xS@NC agaric-like structure can well shorten the charge diffusion pathway, and significantly enhance the ionic/electronic conductivities and the reaction kinetics. As expected, the Fe_1−xS@NC electrode, as a prospective SIB anode, delivers a desirable capacity up to 510.2 mA h g⁻¹ at a high rate of 8000 mA g⁻¹. Additionally, even operated at low temperatures of 0 and −25°C, high reversible capacities of 387.1 and 223.4 mA h g⁻¹ can still be obtained at 2000 mA g⁻¹, respectively, indicating its huge potential use at harsh temperatures. More noticeably, the full battery made by the Fe_1−xS@NC anode and Na₃V₂(PO₄)₂O₂F cathode achieves a remarkable rate capacity (186.8 mA h g⁻¹ at 2000 mA g⁻¹) and an impressive cycle performance (183.6 mA h g⁻¹ after 100 cycles at 700 mA g⁻¹) between 0.3 and 3.8 V. Such excellent electrochemical performance is mainly contributed by its pseudocapacitive dominated behavior, which brings fast electrode kinetics and robust structural stability to the whole electrode.

近年来，为钠离子电池（SIB）构造具有宽温度特性的潜在阳极引起了人们的极大兴趣。Fe _{1- x} S是一种通过密度状态计算确定的零带隙材料，由于其低成本和高理论容量，是用于快速储能的理想电极。在此，由掺氮碳包裹的Fe _{1- x} S纳米片材（Fe _{1- x} S @ NC）是采用基于Fe的金属有机骨架（Fe-MOF）作为前驱体，通过后硫化策略设计的。得到的Fe _{1- x}S @ NC木耳状结构可以很好地缩短电荷扩散路径，并显着提高离子/电子电导率和反应动力学。正如预期的那样，作为一种预期的SIB阳极的Fe _{1- x} S @ NC电极以8000 mA g ^-1的高速率提供了高达510.2 mA hg ^-1的理想容量。另外，即使在0和-25°C的低温下运行，在2000 mA g ^-1时仍可分别获得387.1和223.4 mA hg ^-1的高可逆容量，这表明其在苛刻温度下具有巨大的潜在用途。更值得注意的是，由Fe _{1- x} S @ NC阳极和Na ₃ V ₂（PO₄）₂ ö ₂ ˚F阴极实现了显着的速率容量（186.8毫安汞柱^-1在2000毫安克^-1）和令人印象深刻的循环性能（183.6毫安汞柱^-1在700mA克100次循环后^-1 0.3和3.8之间） V.如此优异的电化学性能主要归因于其伪电容主导的行为，该行为为整个电极带来了快速的电极动力学和强大的结构稳定性。