Ultralight and superelastic MXene/reduced graphene oxide aerogels for electromagnetic interference shielding  

作　　者：Xinfeng Zhou Yang Dai Guoyao Yue Yiman Zhang Lulu Li Zhong-Zhen Yu Peng Min Hao-Bin Zhang 

机构地区：[1]State Key Laboratory of Organic-Inorganic Composites,College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]Beijing Key Laboratory of Advanced Functional Polymer Composites,College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [3]Present address:BOE Technology Innovation Center,BOE Technology Group Co.,Ltd.,Beijing 100176,China [4]Xi’an Modern Chemistry Research Institute,Xi’an 710065,China

出　　处：《Nano Research》2025年第1期1-9,共9页纳米研究（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.52273064,51922020,52090034,52203080,and 52221006)is gratefully acknowledged.

摘　　要：Lightweight aerogels feature multifunctionality and a high porosity,yet accompanied with poor structure recovery under large strain deformations.In this work,we develop an air bubble-ice crystal dual template and annealing strategy to integrate low density and high resilience for the conductive transition metal carbides/nitrides(MXene)composite aerogels.The air bubbles and ice crystals synergistically exclude the nanosheets to the gas-liquid interfaces,thereby constructing unique Y-shaped junctions and robust skeleton.Subsequent annealing process greatly enhances the interlayer interactions.Under external load,the Yshaped structures prevent the stress concentration at the junctions by transferring the forces to the skeleton for maintaining structural stability.In addition,the wrinkled and thick cell walls,together with the enhanced interlayer interactions,endow the aerogel with exceptional structural stability and resilience.As a result,the MXene/reduced graphene oxide(RGO)composite aerogels exhibit superelasticity with reversible compressive strains of up to 95%.In addition,the electron bridging effect of the RGO sheets affords the aerogel to deliver excellent electromagnetic interference shielding performance,as high as 46.3 dB at 2.5 mm.Furthermore,the remarkable reshapeability of the aerogels allows for precise regulation of structure and performance(33.5-75.1 dB)by a simple wetting compression process.In summary,this work offers helpful inspirations for developing lightweight and superelasticity aerogels for extensive applications.

关 键 词：LIGHTWEIGHT SUPERELASTICITY MXene aerogel electromagnetic interference shielding reshapeability 

分 类 号：TQ127.11[化学工程—无机化工]