Organic piezoelectric materials have attracted significant interest for applications in sensing,energy harvesting,and flexible electronics.However,its piezoelectric properties are yet to be improved.This study introdu...Organic piezoelectric materials have attracted significant interest for applications in sensing,energy harvesting,and flexible electronics.However,its piezoelectric properties are yet to be improved.This study introduces a facile strategy to fabricate homogenous and dense polyvinylidene fluoride(PVDF)films with high piezoelectric performance via anhydrous CaCl_(2)doping.The strong ion-dipole interaction between Ca^(2+)and F atoms,along with directional dipole alignment under an electric field at elevated temperature,as verified by molecular dynamics simulations and material characterizations.This results in an impressiveβ-phase content of 92.78%and a piezoelectric coefficient of 29.26 pm/V.A piezoelectric device fabricated from this PVDF film delivers an output voltage exceeding 12 V under external pressure and maintains stability over 60,000 cycles.When integrated with an LC resonant circuit,it functions as a wireless sensor for real-time motion monitoring.This scalable approach significantly advances piezoelectric polymer performance for practical applications.展开更多
基金funded by the“Leading Goose”R&D Program of Zhejiang Province(No.2022C01136)the Key Research Project of Zhejiang(LD22E030007)Zhejiang University Education Foundation Global Partnership Fund(No.100000-11320).
文摘Organic piezoelectric materials have attracted significant interest for applications in sensing,energy harvesting,and flexible electronics.However,its piezoelectric properties are yet to be improved.This study introduces a facile strategy to fabricate homogenous and dense polyvinylidene fluoride(PVDF)films with high piezoelectric performance via anhydrous CaCl_(2)doping.The strong ion-dipole interaction between Ca^(2+)and F atoms,along with directional dipole alignment under an electric field at elevated temperature,as verified by molecular dynamics simulations and material characterizations.This results in an impressiveβ-phase content of 92.78%and a piezoelectric coefficient of 29.26 pm/V.A piezoelectric device fabricated from this PVDF film delivers an output voltage exceeding 12 V under external pressure and maintains stability over 60,000 cycles.When integrated with an LC resonant circuit,it functions as a wireless sensor for real-time motion monitoring.This scalable approach significantly advances piezoelectric polymer performance for practical applications.
