用静电纺丝技术制备纳米片取向结构复合电介质材料  

Preparation of Nanosheet Orientation Structure Composite Dielectric Materials with Electrospinning Technology

作　　者：王健[1] 王宝慧 谭永涛 WANG Jian;WANG Baohui;TAN Yongtao(School of Materials and New Energy,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学材料与新能源学院,宁夏银川750021

出　　处：《宁夏工程技术》2024年第1期23-27,34,共6页Ningxia Engineering Technology

基　　金：宁夏大学博士科研启动金项目;宁夏重点研发计划(引才计划)项目(2021BEB04074)。

摘　　要：金属化薄膜电容器因其具有超高功率密度而在新能源行业领域受到广泛关注。为了提升薄膜电容器的储能密度,将高绝缘氮化硼纳米片(BNNS)引入到聚偏氟乙烯(PVDF)基聚合物中以制备电容器用高储能复合电介质材料,并利用静电纺丝技术实现BNNS均匀取向的分布。结果表明,均匀取向分布的高绝缘纳米片可以抑制载流子迁移并提升复合材料的击穿场强。结合相场模拟分析可知,均匀取向分布的BNNS结构能调控外电场分布且更有效地阻滞复合材料被击穿,最终在396 MV/m的电场强度下实现高达10.5 J/cm^(3)的储能密度。Metallized film capacitors have attracted much attention in the new energy industry due to their ultra-high power density.In order to enhance the energy storage density of film capacitors,highly insulating boron nitride nanoplates(BNNS)are introduced into the polyvithin-filmnylidene fluoride(PVDF)polymer matrix to prepare high-energy-storage composite dielectric materials.Electrospinning technology is used to achieve a uniformly oriented distribution of BNNS.The results show that the highly insulating nanosheets with uniform oriented distribution can inhibit the carrier migration and enhance the breakdown strength of the composites.Combined with the phase-field simulation analysis,it is known that the uniformly oriented BNNS can adjust the external electric field distribution and block the breakdown more effectively.Ultimately,an energy storage density of up to 10.5 J/cm^(3) is achieved at the electric field intensity of 396 MV/m.

关 键 词：复合电介质 静电纺丝 BNNS 击穿场强 

分 类 号：TB33[一般工业技术—材料科学与工程] O631[理学—高分子化学]