Alkali (Li, Na, K) ion battery have practically or potentially been widely used as a power source for portable electronic devices and electric vehicles. However, lack of universal anodes for these three alkali ion battery are restricting their development, especially for Na-ion battery and K-ion battery. Rhenium disulfide (ReS₂), with large interlayer space and weak van der Waals interaction between layers, can afford massive alkali (lithium, sodium, and potassium) ions to diffuse easily between the layers. However, its low electronic conductivity and large volume changes in the conversion reaction significantly compromise the cycle life. To address this issue, here, we anchor ReS₂ nanosheets onto nitrogen doped carbon nanofibers (N-CNF) which forms a flexible ReS₂/N-CNFs paper for alkali (Li, Na, and K) ion battery anodes. The carbon nanofibers (CNFs) can improve the conductivity and the doped nitrogen can absorb sulfur and polysulfide generated by the conversion reaction. As a result, the ReS₂/N-CNFs composite anode maintains a reversible capacity of 430 mAh/g after 400 cycles at 100 mA/g in LIBs, 245 mAh/g after 800 cycles at 100 mA/g in NIBs, and 253 mAh/g after 100 cycles at 50 mA/g in KIBs. This performance is one of the best among all ReS₂ reported up to date. In addition, the solid electrolyte interface formation on ReS₂ and the coulombic efficiency in different alkali ion batteries are also systemically investigated.

碱性（Li，Na，K）离子电池已被实际或潜在地广泛用作便携式电子设备和电动车辆的电源。但是，这三种碱离子电池缺乏通用的阳极，限制了它们的发展，特别是对于Na离子电池和K离子电池。二硫化hen（ReS ₂），具有较大的层间空间和较弱的层间Van der Waals相互作用，可以提供大量的碱金属离子（锂，钠和钾），使其易于在层之间扩散。但是，其低电子电导率和转换反应中的大体积变化显着损害了循环寿命。为了解决这个问题，在这里，我们将ReS ₂纳米片固定在氮掺杂的碳纳米纤维（N-CNF）上，形成柔性的ReS ₂/ N-CNFs纸，用于碱性（Li，Na和K）离子电池阳极。碳纳米纤维（CNFs）可以提高导电性，掺杂的氮可以吸收转化反应产生的硫和多硫化物。结果，ReS ₂ / N-CNFs复合阳极在100 mA / g的LIB中400次循环后保持430 mAh / g的可逆容量，在100 mA / g的NIB中800次循环后保持245 mAh / g的可逆容量。在KIB中以50 mA / g进行100次循环后的mAh / g。该性能是最新报告的所有ReS _2中最好的性能之一。另外，还系统地研究了在不同碱离子电池上ReS ₂上固体电解质界面的形成和库仑效率。