材料科学
阴极
超级电容器
MXenes公司
电容
储能
阳极
光电子学
纳米技术
电极
化学
物理化学
物理
功率(物理)
量子力学
作者
Xiaofeng Zhang,Muhammad Sufyan Javed,Salamat Ali,Awais Ahmad,Syed Shoaib Ahmad Shah,Iftikhar Hussain,Dongwhi Choi,Ammar M. Tighezza,Sayed M. Eldin,Chao Xia,Shafaqat Ali,Weihua Han
出处
期刊:Nano Energy
[Elsevier]
日期:2024-02-01
卷期号:120: 109108-109108
被引量:1
标识
DOI:10.1016/j.nanoen.2023.109108
摘要
The aqueous hybrid supercapacitor (AHSC) based on ammonium ion (NH4+) is an interesting energy storage device with excellent properties. However, the scarcity of appropriate and effective cathode materials limited its practicality. Two-dimensional (2D) transition metal nitrides, carbides, or carbonitrides (MXenes) show potential as cathode materials, but their low capacitance limits their applicability. Here, we synthesized N-functionalized 2D MXene (Ti3C2Tx) with Ti2N interface engineering (Ti2N/Ti3C2Tx), which displayed not only superior capacitance and rate capability but also a cycling stability than pristine Ti3C2Tx. Ex-situ XRD and XPS were used to study the fast transport of electrons/ions and their charge storage mechanism at the interface of Ti2N/Ti3C2Tx. Furthermore, density functional theory (DFT) calculations were employed to validate the superior conductivity at the interface of the Ti2N/Ti3C2Tx (Tx = OH) electrode. Moreover, AHSC was assembled with the Ti2N/Ti3C2Tx as cathode, and activated carbon as anode possesses outstanding energy storage performance. This study not only elucidates the charge storage process of Ti2N/Ti3C2Tx but also provides new insights for designing novel cathode materials for energy storage devices.
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