To date, MXene dispersions have been mostly limited to polar solvents. Here, we show that when the lithium cations present between MXene multilayers after etching are exchanged with di(hydrogenated tallow)benzyl methyl ammonium chloride (DHT), they become organophilic and form highly stable colloidal suspensions in nonpolar solvents. The rapid cation exchange occurs under ambient conditions and the resulting two-dimensional flakes are well dispersed and remain oxide free. A 142 ± 0.7-μm thick film (≈10 mg ⋅ cm⁻²) made from a DHT-Ti₃C₂T_z suspension in toluene exhibits pseudocapacitive behavior, with a capacitance of 305 F ⋅ g⁻¹ at a scan rate 2 mV ⋅ s⁻¹. The moduli and tensile strengths of solution-processed polyethylene nanocomposites are increased by ≈11% and 32% with a loading of ≈1 vol% DHT-Ti₃C₂T_z. Our approach may enable the use of MXenes in multiple research and industrial fields.

迄今为止，MXene分散体主要限于极性溶剂。在这里，我们表明当蚀刻后在MXene多层之间存在的锂阳离子与二（氢化牛脂）苄基甲基氯化铵（DHT）交换时，它们变成亲有机的，并在非极性溶剂中形成高度稳定的胶体悬浮液。快速阳离子交换在环境条件下发生，并且所得的二维薄片良好地分散并且保持无氧化物。由DHT-Ti ₃ C ₂ T _z的甲苯悬浮液制成的142±0.7-μm厚膜（≈10mg⋅cm ^-2）表现出假电容特性，在扫描速率2下的电容为305 F⋅g ^-1 mV⋅s ^-1。固溶处理的聚乙烯纳米复合材料的模量和拉伸强度分别增加了约11％和32％，其中DHT-Ti ₃ C ₂ T _z的负载量约为1vol％。我们的方法可以使MXenes在多个研究和工业领域中使用。