title: Mussel-inspired Fluoro-Polydopamine Functionalization of Titanium Dioxide Nanowires for Polymer Nanocomposites with Significantly Enhanced Energy Storage Capability.
abstract: High-dielectric-constant polymer nanocomposites are demonstrated to show great promise as energy storage materials. However, the large electrical mismatch and incompatibility between nanofillers and polymer matrix usually give rise to significantly reduced breakdown strength and weak energy storage capability. Therefore, rational selection and elaborate functionalization of nanofillers to optimize the performance of polymer nanocomposites are vital. Herein, inspired by adhesive proteins in mussels, a facile modification by fluoro-polydopamine is employed to reinforce the compatibility of TiO2nanowires in the fluoropolymer matrix. The loading of 2.5 vol % f-DOPA@TiO2NWs leads to an ultrahigh discharged energy density of 11.48 J cm-3at 530 MV m-1, more than three times of commercial biaxial-oriented polypropylene (BOPP, 3.56 J cm-3at 600 MV m-1). A gratifying high energy density of 9.12 J cm-3has also been obtained with nanofiller loading as high as 15 vol % at 360 MV m-1, which is nearly double to that of pure P(VDF-HFP) (4.76 J cm-3at 360 MV m-1). This splendid energy storage capability seems to rival or exceed most of previously reported nano-TiO2based nanocomposites. The methods presented here provide deep insights into the design of polymer nanocomposites for energy storage applications.
authors.affiliation: Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Guanyao
authors.initials: G
authors.lastname: Wang
authors.affiliation: Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Xingyi
authors.initials: X
authors.lastname: Huang
authors.affiliation: Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Pingkai
authors.initials: P
authors.lastname: Jiang