插层(化学)
电化学
离子
材料科学
锂(药物)
储能
电子
化学工程
纳米技术
无机化学
化学物理
化学
电极
物理化学
物理
工程类
内分泌学
医学
量子力学
功率(物理)
有机化学
作者
Yixuan Wang,Miao Liu,Zhihe Wang,Qinhua Gu,Bo Liu,Cuimei Zhao,Junkai Zhang,Shuping Xu,Minxu Lu,Haibo Li,Bingsen Zhang
标识
DOI:10.1016/j.jechem.2021.11.019
摘要
The intercalation of foreign species into MXene, as an approach of tuning the interlayer environment, is employed to improve electrochemical ion storage behaviors. Herein, to understand the effect of confined ions by the MXene layers on the performance of electrochemical energy storage, Zn2+ ions were employed to intercalate into MXene via an electrochemical technique. Zn2+ ions induced a shrink of the adjacent MXene layers. Meaningfully, a higher capacity of lithium ion storage was obtained after Zn2+ pre-intercalation. In order to explore the roles of the intercalated Zn2+ ions, the structural evolution, and the electronic migration among Zn, Ti and the surface termination were investigated to trace the origination of the higher Li+ storage capacity. The pre-intercalated Zn2+ ions lost electrons, meanwhile Ti of MXene obtained electrons. Moreover, a low-F surface functional groups was achieved. Contrary to the first shrink, after 200 cycles, a larger interlayer distance was monitored, this can accelerate the ion transport and offer a larger expansile space for lithium storage. This may offer a guidance to understand the roles of the confined ion by two-dimensional (2D) layered materials.
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