Bio-Inspired Fluoro-polydopamine Meets Barium Titanate Nanowires: A Perfect Combination to Enhance Energy Storage Capability of Polymer Nanocomposites.
Rapid evolution of energy storage devices expedites the development of high-energy-density materials with excellent flexibility and easy processing. The search for such materials has triggered the development of high-dielectric-constant (high-k) polymer nanocomposites. However, the enhancement of k usually suffers from sharp reduction of breakdown strength, which is detrimental to substantial increase of energy storage capability. Herein, the combination of bio-inspired fluoro-polydopamine functionalized BaTiO3nanowires (NWs) and a fluoropolymer matrix offers a new thought to prepare polymer nanocomposites. The elaborate functionalization of BaTiO3NWs with fluoro-polydopamine has guaranteed both the increase of k and the maintenance of breakdown strength, resulting in significantly enhanced energy storage capability. The nanocomposite with 5 vol % functionalized BaTiO3NWs discharges an ultrahigh energy density of 12.87 J cm-3at a relatively low electric field of 480 MV m-1, more than three and a half times that of biaxial-oriented polypropylene (BOPP, 3.56 J cm-3at 600 MV m-1). This superior energy storage capability seems to rival or exceed some reported advanced nanoceramics-based materials at 500 MV m-1. This new strategy permits insights into the construction of polymer nanocomposites with high energy storage capability.
Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University , Shanghai 200240, China.
Guanyao
http://orcid.org/0000-0002-7151-7782
G
Wang
Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University , Shanghai 200240, China.
Xingyi
X
Huang
Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University , Shanghai 200240, China.
Pingkai
P
Jiang
bio-inspired; dielectric constant; energy storage; nanocomposite; nanowire