Porous Cryo-Dried MXene for Efficient Capacitive Deionization
Porous Cryo-Dried MXene for Efficient Capacitive Deionization
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DOI：
10.1016/j.joule.2018.02.018
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发表时间：
2018-04-18
期刊：
影响因子：
39.8
通讯作者：
Wang, Guoxiu
中科院分区：
文献类型：
--
作者：
Bao, Weizhai;Tang, Xiao;Wang, Guoxiu
气凝胶状多孔Ti 3C 2 Tx MXene结构电极对盐水的电容去离子显示出高的电吸附容量。采用真空冷冻干燥工艺来防止MXene纳米片由于货车德瓦尔斯力而重新堆叠，导致形成具有大比表面积的多孔结构。当用作电容去离子的电极材料时，多孔MXene在1 M氯化钠（NaCl）电解质中表现出156 F/g的高比电容和410 F/cm（3）的体积电容。在10，000 mg/L NaCl溶液中（施加电压：1 2 V），多孔Ti 3C 2 Tx MXene电极的电吸附容量可达118 mg/cm（3）（45 mg/g），与叠层MXene和活性炭电极相比，具有优异的循环稳定性（高达60次循环），表明其在海水淡化应用中具有良好的潜力。
Aerogel-like, porous Ti3C2Tx MXene architecture electrode displayed a high electroadsorption capacity for capacitive deionization of saline water. A vacuum freeze-drying process was employed to prevent the restacking of MXene nanosheets due to van der Waals forces, leading to the formation of a porous structure with a large specific surface area. When applied as electrode materials for capacitive deionization, porous MXene demonstrated a high specific capacitance of 156 F/g and a volumetric capacitance of 410 F/cm(3) in 1 M sodium chloride (NaCl) electrolyte. The porous Ti3C2Tx MXene electrodes can deliver a high electroadsorption capacity of 118 mg/cm(3) (45 mg/g) in 10,000 mg/L NaCl solution (applied voltage: 1 2 V) and excellent cycling stability (up to 60 cycles) in comparison with the restacked MXene and activated carbon electrodes, indicating its promising potential for desalination applications.