文献类型：期刊文献

英文题名：Rational design of antifreeze and flexible chitosan-based hydrogels for integration device of supercapacitors electrodes and wearable strain sensors

作者：Zou, Xinquan[1];Liu, Hongyuan[1];Hu, Zhenyan[2];Zhang, Yi[1];Cheng, Jinggang[1];Wang, Kun[1];Feng, Yuwei[1];Wang, Jikui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：354

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20250617818340);WOS:【SCI-EXPANDED(收录号:WOS:001424363100001)】；

基金：This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the characterization of XRD.

语种：英文

外文关键词：Antifreeze electrodes; Supercapacitors; Flexible hydrogels; Wearable strain sensors

摘要：Hydrogels with excellent flexibility are widely used in flexible sensors and supercapacitors, but their sensitivity and operating temperature range limit their application. In this study, chitosan (CS)/polyaniline (PANI) hydrogel with interpenetrating network structure is designed, in which phytic acid is used as crosslinking agent and antifreeze. The obtained CS/PANI hydrogel exhibits excellent mechanical properties, excellent sensing performance (Gauge Factor = 5.25), fast electrochemical response, high specific capacitance (383.7 F/g at 0.5 A/g) and good cycle stability, which may be due to the interpenetrating network structure formed between phytic acid cross-linked PANI and CS molecular chains. Due to these properties, CS/PANI hydrogels can be used as flexible sensors and supercapacitor electrodes materials. Because of the electrostatic interaction between the anionic and cationic groups in phytic acid, it also has certain frost resistance. The CS/PANI hydrogel can provide a high specific capacitance of 330 F/g at -40 degrees C. Compared with room temperature, the capacitance retention rate is as high as 87 %. It is believed that this CS/PANI hydrogel will be used as a new multifunctional material in many fields such as flexible electrodes, sensors and wearable devices in low temperature environments.