MXenes公司
超级电容器
电容
材料科学
电极
重量分析
氮化物
电化学
金属
过渡金属
水溶液
循环伏安法
光电子学
分析化学(期刊)
纳米技术
冶金
化学
图层(电子)
有机化学
催化作用
物理化学
生物化学
色谱法
作者
Kaitlyn Prenger,Yangunli Sun,Karthik Ganeshan,Ameer Al-Temimy,Kun Liang,Chaochao Dun,Tracy M. Mattox,Jie Xiao,Tristan Petit,Adri C. T. van Duin,De‐en Jiang,Michael Naguib
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-07-20
卷期号:5 (8): 9373-9382
被引量:16
标识
DOI:10.1021/acsaem.2c00653
摘要
Two-dimensional transition-metal carbides and nitrides “MXenes” have demonstrated great potential as electrode materials for electrochemical energy storage systems. This is especially true for delaminated Ti3C2Tx, which already shows outstanding gravimetric and volumetric capacitance, with areal capacitance limited by thickness (only a few microns). However, the performance of multilayer Ti3C2Tx has been more modest. Here, we report on using metal cation (viz., Na+, K+, and Mg2+) pre-intercalated multilayer Ti3C2Tx as electrodes for aqueous supercapacitors. These electrodes are scalable and amenable to roll-to-roll manufacturing, with adjustable areal loadings of 5.2 to 20.1 mg/cm2. K–Ti3C2Tx exhibited the highest capacitances at different scan rates. A gravimetric capacitance comparable to that of delaminated MXene of up to 300 F/g was achieved for multilayer K–Ti3C2Tx but with an outstanding ultra-high areal capacitance of up to 5.7 F/cm2, which is 10-fold higher than the 0.5 F/cm2 of delaminated MXene and exceeds the 4.0 F/cm2 of microengineered MXene electrodes.
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