介孔材料
材料科学
电化学
电极
兴奋剂
储能
纳米技术
化学工程
离子
光电子学
化学
催化作用
有机化学
物理化学
物理
工程类
功率(物理)
量子力学
作者
Guohao Li,Shuhan Lian,Fei Song,Shuijiao Chen,Zhenjun Wu,Xiuqiang Xie,Nan Zhang
出处
期刊:Small
[Wiley]
日期:2021-10-27
卷期号:17 (49)
被引量:19
标识
DOI:10.1002/smll.202103626
摘要
Electrochemical sodium-ion storage has come out as a promising technology for energy storage, where the development of electrode material that affords high volumetric capacity and long-term cycling stability remains highly desired yet a challenge. Herein, Ti3 C2 Tx (MXene)-based films are prepared by using sulfur (S) as the mediator to modulate the surface chemistry and microstructure, generating S-doped mesoporous Ti3 C2 Tx films with high flexibility. The mesoporous architecture offers desirable surface accessibility without significantly sacrificing the high density of Ti3 C2 Tx film. Meanwhile, the surface sulfur doping of Ti3 C2 Tx favors the diffusion of sodium ions. These merits are of critical importance to realize high volumetric capacity of the electrode material. As a consequence, as the freestanding electrode material for electrochemical sodium-ion storage, the S-doped mesoporous Ti3 C2 Tx film exhibits a high volumetric capacity of 625.6 mAh cm-3 at 0.1 A g-1 , which outperforms that of many reported electrodes. Moreover, outstanding rate capability and excellent long-term cycling stability extending 5000 cycles are achieved. The work opens the door for innovative design and rational fabrication of MXene-based films with ultrahigh volumetric capacity for sodium-ion storage.
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