Nanocellulose-Assisted Construction of Multifunctional MXene-Based Aerogels with Engineering Biomimetic Texture for Pressure Sensor and Compressible Electrode  

作　　者：Ting Xu Qun Song Kun Liu Huayu Liu Junjie Pan Wei Liu Lin Dai Meng Zhang Yaxuan Wang Chuanling Si Haishun Du Kai Zhang 

机构地区：[1]State Key Laboratory of Biobased Fiber Manufacturing Technology,Tianjin Key Laboratory of Pulp and Paper,Tianjin University of Science and Technology,Tianjin 300457,People’s Republic of China [2]Sustainable Materials and Chemistry,Department of Wood Technology and Wood-Based Composites,University of Göttingen,37077 Göttingen,Germany [3]Department of Chemical Engineering,Auburn University,Auburn,AL 36849,USA [4]State Key Laboratory of Bio-Based Materials and Green Papermaking,Qilu University of Technology(Shandong Academy of Sciences),3501 Daxue Road,Jinan 250353,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第7期122-135,共14页纳微快报（英文版）

基　　金：supported by the Project of Jinan City(202228044);National Natural Science Foundation of China(32071720,32271814);the China Postdoctoral Science Foundation(2021M702456);China Scholarship Council for supporting their PhD program。

摘　　要：Multifunctional architecture with intriguing structural design is highly desired for realizing the promising performances in wearable sensors and flexible energy storage devices.Cellulose nanofiber(CNF)is employed for assisting in building conductive,hyperelastic,and ultralight Ti_(3)C_(2)T_(x)MXene hybrid aerogels with oriented tracheid-like texture.The biomimetic hybrid aerogels are constructed by a facile bidirectional freezing strategy with CNF,carbon nanotube(CNT),and MXene based on synergistic electrostatic interaction and hydrogen bonding.Entangled CNF and CNT“mortars”bonded with MXene“bricks”of the tracheid structure produce good interfacial binding,and superior mechanical strength(up to 80%compressibility and extraordinary fatigue resistance of 1000 cycles at 50%strain).Benefiting from the biomimetic texture,CNF/CNT/MXene aerogel shows ultralow density of 7.48 mg cm^(-3)and excellent electrical conductivity(~2400 S m^(-1)).Used as pressure sensors,such aerogels exhibit appealing sensitivity performance with the linear sensitivity up to 817.3 kPa^(-1),which affords their application in monitoring body surface information and detecting human motion.Furthermore,the aerogels can also act as electrode materials of compressive solid-state supercapacitors that reveal satisfactory electrochemical performance(849.2 mF cm^(-2)at 0.8 mA cm^(-2))and superior long cycle compression performance(88%after 10,000 cycles at a compressive strain of 30%).

关 键 词：NANOCELLULOSE AEROGELS MXene SUPERCAPACITORS Pressure sensors 

分 类 号：TQ427.26[化学工程] TP212[自动化与计算机技术—检测技术与自动化装置] TM53[自动化与计算机技术—控制科学与工程]