Dielectric Properties and Energy Storage Densities of Poly(vinylidenefluoride) Nanocomposite with Surface Hydroxylated Cube Shaped Ba0.6Sr0.4TiO₃ Nanoparticles

Shaohui Liu; Shaomei Xiu; Bo Shen; Jiwei Zhai; Ling Bing Kong

doi:10.3390/polym8020045

Dielectric Properties and Energy Storage Densities of Poly(vinylidenefluoride) Nanocomposite with Surface Hydroxylated Cube Shaped Ba_0.6Sr_0.4TiO₃ Nanoparticles

Polymers (Basel). 2016 Feb 16;8(2):45. doi: 10.3390/polym8020045.

Authors

Shaohui Liu^{1

2}, Shaomei Xiu³, Bo Shen⁴, Jiwei Zhai⁵, Ling Bing Kong⁶

Affiliations

¹ Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China. qqliushaohui@163.com.
² School of Science, Henan Institute of Engineering, Zhengzhou 451191, China. qqliushaohui@163.com.
³ Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China. 1534890522@qq.com.
⁴ Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China. shenbo@tongji.edu.cn.
⁵ Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China. apzhai@tongji.edu.cn.
⁶ School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore. ELBKong@ntu.edu.sg.

Abstract

Ceramic-polymer nanocomposites, consisting of surface hydroxylated cube-shaped Ba_0.6Sr_0.4TiO₃ nanoparticles (BST⁻NPs) as fillers and poly(vinylidenefluoride) (PVDF) as matrix, have been fabricated by using a solution casting method. The nanocomposites exhibited increased dielectric constant and improved breakdown strength. Dielectric constants of the nanocomposite with surface hydroxylated BST⁻NPs (BST⁻NPs⁻OH) were higher as compared with those of their untreated BST⁻NPs composites. The sample with 40 vol % BST⁻NPs⁻OH had a dielectric constant of 36 (1 kHz). Different theoretical models have been employed to predict the dielectric constants of the nanocomposites, in order to compare with the experimental data. The BST⁻NPs⁻OH/PVDF composites also exhibited higher breakdown strength than their BST⁻NP/PVDF counterparts. A maximal energy density of 3.9 J/cm³ was achieved in the composite with 5 vol % BST⁻NPs⁻OH. This hydroxylation strategy could be used as a reference to develop ceramic-polymer composite materials with enhanced dielectric properties and energy storage densities.

Keywords: dielectric properties; energy storage density; inorganic–organic nanocomposite; surface hydroxylation.