Details

Autor(en) / Beteiligte

• Wang, Junchuan
• Sun, Ying
• Wang, Pengna
• Yu, Xuemin
• Shi, Hongbing
• Zhang, Xueqin
• Yang, Hong
• Lin, Baoping

Titel

High energy density of polyimide composites containing one-dimensional BaTiO3@ZrO2 nanofibers for energy storage device

Ist Teil von

• Journal of alloys and compounds, 2019-06, Vol.789, p.785-791

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2019

Quelle

ScienceDirect

Beschreibungen/Notizen

• Novel one-dimensional (1D) core-shell structured BaTiO3@ZrO2 (BT@ZrO2) nanofibers have been synthesized through coaxial electrospinning. Homogeneous composite films containing 1D BT@ZrO2 nanofibers as filler and polyimide (PI) as the polymer matrix were fabricated. The depolarizing ZrO2 layer with moderate dielectric constant was introduced onto the BT nanofibers surface and decreased the electric filed caused by the tremendous contrast between the PI matrix and the BT nanofibers in permittivity. The energy density and breakdown strength of the BT@ZrO2/PI composites can be substantially enhanced. It was established that the 2 vol% BT@ZrO2/PI composite film has the maximum energy density of 2.53 J/cm3 at 361 kV/mm, which is ≈ 180% higher than that of the pristine PI (1.40 J/cm3 at 303 kV/mm). Furthermore, finite element simulation was carried out to understand the effect of ZrO2 layer on the electric field distribution. This work demonstrates the advantages of the moderate inorganics layer in increasing the breakdown strength and highly enhancing the energy density of the polymer based composites. •The BaTiO3@ZrO2 nanofibers have been synthesized via coaxial electrospinning.•The 2 vol% BaTiO3@ZrO2/PI film has the maximum energy density of 2.53 J/cm3.•The ZrO2 layer can decrease the electric field between the PI and BaTiO3 nanofibers.