期刊
NANO ENERGY
卷 72, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.104741
关键词
Ti3C2Tx MXene; Cation intercalation; Density functional theory calculation; Micro-supercapacitors; Electromagnetic interference shielding
类别
资金
- National Natural Science Foundation of China [61334002, 51872283, 21805273]
- Natural Science Basic Research Plan in Shaanxi Province of China [2016ZDJC-09, 2019JQ-860]
- Young Talent fund of University Association for Science and Technology in Shaanxi, China [201701060]
- Wuhu and Xidian University special fund for industry- university-research cooperation, China [HX01201909039]
- Fundamental Research Funds for the Central Universities of China
- Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science [20180510038]
- LiaoNing Revitalization Talents Program [XLYC1807153]
- DICP [DICP ZZBS201708, DICP ZZBS201802]
- Dalian National Laboratory For Clean Energy (DNL), CAS
- DICPQIBEBT [DICPQIBEBT UN201702]
- DNL Cooperation Fund, CAS [DNL180310, DNL180308, DNL201912, DNL201915]
- Innovation Fund of Xidian University of China
- Natural Science Foundation of Liaoning Province
Multifunctional and flexible micro-supercapacitors (MSCs) have attractive prospects in integrated micro electronic systems fields owing to its high power density, fast charge/discharge rates and small volume feature. Here, a flexible MSC functional electromagnetic interference (EMI) shielding is designed based on Mn ion-intercalated Ti3C2Tx MXene, presenting a high areal capacitance of 87 mF cm(-2) at 2 mV s(-1), remarkable energy density of 11.8 mWh cm(-3) and outstanding shielding effectiveness of 44 dB. By density functional theory (DFT) calculation, the interaction between Mn ions and surface terminal (-F, -O, and -OH) of Ti3C2Tx is emphatically discussed, finding that the intercalated Mn ions are inclined to be bonding with O-contained groups with the orbital hybridization of Mn 3d and O 2p. It is intriguing to provide enhanced electrochemical performance in energy storage and additive interlayer EM waves absorption in EMI shielding. The present work can offer new insights about underlying mechanism of cation intercalation in Ti3C2Tx MXene and multiple functional devices application in integrated micro electronics systems field.
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