奥斯特瓦尔德成熟
材料科学
化学工程
催化作用
电解质
MXenes公司
硫黄
范德瓦尔斯力
纳米技术
碳纳米管
电化学
电极
化学
分子
有机化学
冶金
工程类
物理化学
作者
Meng‐Yao Xu,Lin Liang,Jing Qi,Tianli Wu,Dan Zhou,Zhubing Xiao
出处
期刊:Small
[Wiley]
日期:2021-03-17
卷期号:17 (17)
被引量:35
标识
DOI:10.1002/smll.202007446
摘要
Abstract The distinguishable physicochemical properties of MXenes render them attractive in electrochemical energy storage. However, the strong tendency to self‐restack owing to the van der Waals interactions between the MXene layers incurs a massive decrease in surface area and blocking of ions transfer and electrolytes penetration. Here, in situ generated Ti 3 C 2 T x MXene‐carbon nanotubes (Ti 3 C 2 T x ‐CNTs) hybrids are reported via low‐temperature self‐catalyzing growth of CNTs on Ti 3 C 2 T x nanosheets without the addition of any catalyst precursors. With combined spectroscopic studies and theoretical calculation results, it is certified that the intralayered Ostwald ripening‐induced Ti 3 C 2 T x nanomesh structure contributes to the uniform precipitation of ultrafine metal Ti catalysts on Ti 3 C 2 T x , thus giving rise to the in situ CNTs formation on the surface of Ti 3 C 2 T x with high integrity. Taking advantages of intimate electrolyte penetration, unobstructed 3D Li + /e transport, and rich electroactive sites, the Ti 3 C 2 T x ‐CNTs hybrids are confirmed to be ideal 3D scaffolds for accommodating sulfur and regulating the polysulfides conversion for high‐loaded lithium–sulfur batteries.
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