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Metal Ion‐Induced Assembly of MXene Aerogels via Biomimetic Microtextures for Electromagnetic Interference Shielding, Capacitive Deionization, and Microsupercapacitors
Author(s) -
Ding Meng,
Li Shuo,
Guo Lu,
Jing Lin,
Gao SiPing,
Yang Haitao,
Little Joshua M.,
Dissanayake Thilini U.,
Li Kerui,
Yang Jie,
Guo YongXin,
Yang Hui Ying,
Woehl Taylor J.,
Chen PoYen
Publication year - 2021
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202101494
Subject(s) - materials science , aerogel , capacitive deionization , mxenes , nanotechnology , electrode , electromagnetic shielding , capacitive sensing , surface modification , supercapacitor , optoelectronics , electrochemistry , chemical engineering , composite material , chemistry , computer science , engineering , operating system
Scaling the synergistic properties of MXene nanosheets to microporous aerogel architectures requires effective strategies to overcome the nanosheet restacking without compromising MXene's advantageous properties. Traditional assembly approaches of 3D MXene aerogels normally involve external binders/templates and/or additional functionalization, which sacrifice the electrical conductivities and electrochemical activities of MXene aerogels. Herein, inspired by the hierarchal scale textures of Phrynosoma cornutum , a crumple‐textured Ti 3 C 2 T x MXene platform is engineered to facilitate Mg 2+ ‐induced assembly, enabling conformal formation of large‐area Mg 2+ ‐MXene aerogels without polymeric binders. Through a doctor blading technique and freeze drying, the Mg 2+ ‐MXene aerogels are produced with customized shapes/dimensions, featuring high surface area (140.5 m 2 g −1 ), superior electrical conductivity (758.4 S m −1 ), and high robustness in water. The highly conductive MXene aerogels show their versatile applications from macroscale technologies (e.g., electromagnetic interference shielding and capacitive deionization (CDI)) to on‐chip electronics (e.g., quasi‐solid‐state microsupercapacitors (QMSCs)). As CDI electrodes, the Mg 2+ ‐MXene aerogels exhibit high salt adsorption capacity (33.3 mg g −1 ) and long‐term operation reliability (over 30 cycles), showing a superb comparison with the literature. Also, the QMSCs with interdigitated Mg 2+ ‐MXene aerogel electrodes demonstrate high areal capacitances (409.3 mF cm −2 ) with superior power density and energy density compared with other state‐of‐art QMSCs.