Surface modification of chitin nanocrystals using conducting polymer for triboelectric nanogenerator

作     者：Ma, Chuangchi He, Yunqing Zeng, Luying Liu, Mingxian 

作者机构：Jinan Univ Coll Chem & Mat Sci Dept Mat Sci & Engn Guangzhou 511443 Peoples R China Jinan Univ Guangdong Prov Key Lab Speed Capabil Res Guangzhou 510632 Peoples R China 

出 版 物：《NANO ENERGY》 (Nano Energy)

年 卷 期：2025年第135卷

核心收录：

学科分类：08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation China Project Team of Foshan National Hi-tech Industrial Development Zone Indus-trialization Entrepreneurial Teams Program Fundamental Research Funds for the Central Universities 

主　　题：Chitin nanocrystals Polypyrrole Single-electrode triboelectric nanogenerator Liquid electrode Wearable devices 

摘      要：Single-electrode triboelectric nanogenerators (TENG) attracted much attentions due to their simplified structure, high energy conversion efficiency, flexible adaptability and wide application potential. Herein, a multifunctional, flexible and highly responsive single-electrode TENG was fabricated by grafting of conducting polypyrrole (PPy) onto the surface of chitin nanocrystals (ChNCs). ChNCs effectively improved the dispersibility of PPy in aqueous solution, thereby improving the electrochemical performance of the suspension. A single-electrode triboelectric nanogenerator (PC-TENG) was fabricated using PPy@ChNCs suspension as the electrode material and polydimethylsilane (PDMS) as the encapsulation material and friction layer. The solid-liquid double layer between the PDMS and the liquid electrode is conducive to output higher triboelectric performance. When the ratio of ChNCs to PPy was 1:2, PC-TENG has a maximum output voltage of approximately 65 V, output current of approximately 8.6 mu A, and a transferred charge of about 38 nC. The power density of PC-TENG can reach 353 mW/m2 with fast responsiveness and stable output performance after 1000 cycles. PC-TENG can realize human motion monitoring and tactile perception with a self-powered system. This work adopted biologically derived ChNCs to improve the dispersibility and conductivity of PPy, and the obtained PC-TENG exhibits promising application in wearable energy harvesting technology.