文献类型：期刊文献

英文题名：Largely enhanced high-temperature energy storage performance of P(VDF-HFP) dielectric films via calcium niobate nanosheets

作者：Lin, Zhiming[1];Bao, Zhiwei[2,3];Wang, Baoyuan[1];Wang, Bingbo[1];Wang, Ziquan[1];Han, Donglin[4];Qiang, Yu[5];Hou, Ying[1];Li, Xiaoguang[2,3]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Dept Phys, Hefei, Peoples R China;[3]Univ Sci & Technol China, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei, Peoples R China;[4]Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai, Peoples R China;[5]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai, Peoples R China

年份：2024

卷号：45

期号：15

起止页码：13803

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20242816678400);WOS:【SCI-EXPANDED(收录号:WOS:001264985700001)】；

基金：The authors acknowledge the financial support by National Natural Science Foundation of China (Grant Nos. 52272109 and 91963116), by Natural Science Foundation of Shanghai (Grant No. 19ZR1411900).

语种：英文

外文关键词：energy storage; high temperature; nanosheets; P(VDF-HFP) based dielectrics

摘要：The capacitive energy-storage capacity of most emerging devices rapidly diminishes with increasing temperature, making high-temperature dielectrics particularly desirable in modern electronic systems. In this work, calcium niobate (Ca2Nb3O10, CNO) nanosheets have been added into poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP), PVHP), forming PVHP/CNO nanocomposites with exceptional temperature stability and ultrahigh energy storage density. Especially, at 80 degrees C and 450 MV/m, the PVHP/0.3 wt%CNO nanocomposite shows an excellent W-rec of 10.81 J/cm(3) which is higher than previous PVDF-based composite films at high temperatures. Because of the high dielectric permittivity of CNO nanosheets and the way that the parallel organization of the nanosheets blocks the course of electrical trees, nanocomposites exhibit greater dielectric constants and breakdown field strengths simultaneously. These findings, will be helpful in the development of flexible, high-energy-density capacitors that have stable performance at high temperatures.