Enhancing energy storage density of poly(arylene ether nitrile)via incorporating modified barium titanate nanorods and hotstretching  

作　　者：Zhengjiao Zhang Lingyun Zhou Lingling Wang Qingqing Hao Xiufu Hua Renbo Wei 

机构地区：[1]School of Chemical Engineering,Northwest University,Xi’an 710069,China [2]Yangtze Delta Region Institute,Tsinghua University,Jiaxing 314006,China

出　　处：《Nano Research》2024年第8期7574-7584,共11页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.21978237);Natural Science Foundation of Shaanxi Province(Nos.2023-JC-YB-370 and 2024-JC-YBQN-0140);Shaanxi Fundamental Science Research Project for Chemistry and Biology(No.22JHQ032)are gratefully acknowledged.

摘　　要：Dielectric energy storage materials that are extensively employed in capacitors and other electronic devices have attracted increasing attentions amid the rapid progress of electronic technology.However,the commercialized polymeric and ceramic dielectric materials characterized by low energy storage density face numerous limitations in practical applications.In this study,we report the simultaneous enhancement of dielectric properties of poly(arylene ether nitrile)(PEN)through the incorporating of sulfonated PEN(SPEN)modified barium titanate nanorods(BTNR)(SPEN@BTNR)and hot-stretching.BTNR is synthesized using a two-step hydrothermal method,aminated with KH550,and then reacted with SPEN to form the cladding-modified [e-mail] to the intrinsic high permittivity of barium titanate(BT)and enhanced compatibility between SPEN@BTNR and PEN stemming from the cladding of SPEN,the dielectric constant and breakdown strength of SPEN@BTNR/PEN composite are as high as 14.0 at 103 Hz and 198.1 kV/mm at the doping amount of 15 wt.%,respectively.As a result,the energy storage density of SPEN@BTNR/PEN is increased to 2.43 J/cm^(3),compared with that of 0.82 J/cm^(3)for PEN.In addition,derived from the rearrangement of SPEN@BTNR and orientation of PEN after hot-stretching,the dielectric constant and breakdown strength of SPEN@BTNR/PEN with 15 wt.%fillers are further enhanced to 17.1 and 204.8 kV/mm,respectively,resulting in an energy storage density of 3.36 J/cm^(3).The boosting of energy storage density up to 310%provides a new idea for improving the performances of dielectric energy storage materials.

关 键 词：barium titanate nanorods poly(arylene ether nitrile) dielectric constant breakdown strength energy density 

分 类 号：TB383[一般工业技术—材料科学与工程]