Dispersion and Stabilization of Alkylated 2D MXene in Nonpolar Solvents and Their Pseudocapacitive Behavior
Dispersion and Stabilization of Alkylated 2D MXene in Nonpolar Solvents and Their Pseudocapacitive Behavior
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DOI：
10.1016/j.xcrp.2020.100042
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发表时间：
2020-04-22
影响因子：
8.9
通讯作者：
Barsoum, Michel W.
中科院分区：
文献类型：
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作者：
Carey, Michael;Hinton, Zachary;Barsoum, Michel W.
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，它们变得亲有机，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分散良好并且保持不含氧化物。142 +/- 0.7 μ m厚的膜（约10 mg . cm（-2））表现出赝电容行为，电容为305 F。g（-1）。s（-1）.溶液处理的聚乙烯纳米复合材料的模量和拉伸强度增加了约11%和32%，负载量约为1体积%的DHT-Ti 3C 2 Tz。我们的方法可以使MXene在多个研究和工业领域中的使用成为可能。
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 weli dispersed and remain oxide free. A 142 +/- 0.7-mu m thick film (approximate to 10 mg . cm(-2)) made from a DHT-Ti3C2Tz suspension in toluene exhibits pseudocapacitive behavior, with a apacitance 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 approximate to 11% and 32% with a loading of approximate to 1 vol% DHT-Ti3C2Tz. Our approach may enable the use of MXenes in multiple research and industrial fields.