Highly flexible, self-healable and conductive poly(vinyl alcohol)/Ti3C2Tx MXene film and it's application in capacitive deionization

被引:78
作者
Ai, Jiayi [1 ]
Li, Jianbin [1 ]
Li, Kai [1 ]
Yu, Fei [2 ]
Ma, Jie [3 ,4 ,5 ]
机构
[1] Guangxi Univ, Coll Light Ind & Food Engn, Nanning 530004, Peoples R China
[2] Shanghai Ocean Univ, Coll Marine Ecol & Environm, Shanghai 201306, Peoples R China
[3] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
[4] Tongji Univ, Coll Environm Sci & Engn, Res Ctr Environm Funct Mat, 1239 Siping Rd, Shanghai 200092, Peoples R China
[5] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
基金
中国国家自然科学基金;
关键词
MXene; PVA; Self-healable; Hydrogel; Capacitive deionization; THERMAL-STABILITY; POLYVINYL-ALCOHOL; PERFORMANCE; DESALINATION; NANOCOMPOSITES; FUTURE; ENERGY; ANODE; CDI;
D O I
10.1016/j.cej.2020.127256
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Self-healing materials show great application potential in the field of flexible energy storage and wearable devices due to their special properties. Here, a self-healing material, application in Capacitive deionization for the first time is reported, which could autonomously self-healing damaged interfaces. We fabricated that hydrogel (MNH) composites incorporating MXene (Ti3C2Tx) by dynamic poly(vinylalcohol)-based network cross-linked by diol-borate ester bonding. The material fast restores its configuration, mechanical properties, and capacitive performances during after healing and shift different shape in the actual application environment transformation. The MNH electrode has good mechanical properties, self-healing efficiency is as high as 92%, the electrochemical healing properties is of 95.8%. The feasibility of its application in capacitive deionization was proved. The electrode performed a salt adsorption capacity of about 51 mg/g at a current density of 10 mA.g(-1) and a voltage window of 1 V and showed excellent cyclic stability. Our work expands the application scenarios of self-healing materials and provides a promising approach for the development of capacitive deionizing electrodes with good self-healing properties and long life.
引用
收藏
页数:9
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