Triboelectric nanogenerator based on changing the nanomorphology of polyoxometalates for gait monitoring of teenagers  

作　　者：Yijia Hao Tuo Ji Jing Zhang Weilin Chen 

机构地区：[1]Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education,Northeast Normal University,Changchun 130024,China

出　　处：《Nano Research》2025年第2期776-788,共13页纳米研究(英文版)

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.22271042 and 21871041);Science and Technology Research Project of the Education Department of Jilin Province(No.JJKH20211286KJ);the Natural Science Foundation of Jilin Province(No.20180101298JC);The Fundamental Research Funds for the Central Universities(No.2412022ZD009).

摘　　要：Timely monitoring abnormal gaits of teenagers is crucial for their physical health and development.Triboelectric nanogenerators(TENGs)are widely used in the wearable field.Choosing high-performance and safe triboelectric materials to monitor abnormal gaits remains challenging.Polyoxometalates(POMs)nanomaterials can effectively serve as triboelectric materials due to rich surface morphology and large specific surface area.Herein,six different sized POMs nanorods(Ag_(4)SiW_(12)O_(40)·nH_(2)O)synthesized through self assembly of POMs(H4SiW12O40·nH2O)were used as triboelectric materials.The TENG composed of nanorod with a diameter of 100 nm and a length of 400–1000 nm has optimal performance with the voltage,current density and charge are 104.3 V,1127.1μA·m^(-2),and 15.38 nC,respectively,which are more than two times of the TENG composed of POMs(H_(4)SiW_(12)O_(40)·nH_(2)O).The optimized TENG maintained a voltage of around 100 V throughout the 1000 s stability test.The maximum power amounts to 25.2μW at 500 MΩexternal resistance.The reasons for the improved performance of nanorods TENG compared to POMs TENG are the increase in roughness and surface potential,which was confirmed through atomic force microscopy(AFM)and kelvin probe force microscopy(KPFM)testing.Furthermore,optimized TENG was applied to the feet of different teenagers and the left and right feet of the same person to monitor abnormal gait.The changes in voltage can sensitively display the inconsistency and abnormal situations of gaits.This study confirms the potential and unique advantages of POMs nanomaterials as triboelectric materials and provides a design scheme for gait monitoring.

关 键 词：POLYOXOMETALATES polyoxometalates nanomaterials NANORODS triboelectric nanogenerator 

分 类 号：TB3[一般工业技术—材料科学与工程]