| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 |
19권 1호 |
| 발표분야 |
나노_포스터 |
| 제목 |
Enhanced Crystallinity, Dielectric and Energy Harvesting Performances of Surface Treated Barium Titanate Hollow Nanospheres/PVDF Nanocomposites |
| 초록 |
Enhancement of the energy harvesting performance and dielectric constants of PVDF-based capacitors was realized by incorporating 16 wt% of surface-treated BaTiO3 hollow nanospheres (HNSs) in comparison with the pristine PVDF. The fabricated BaTiO3 HNSs with particle sizes of ca. 20 nm and BET surface area of 297 m2 g‒1 were treated by three different surface-modifiers. The changes in crystallinity of the PVDF containing the surface-treated BaTiO3 HNSs were induced by both enlarged surface areas and increased surface functionality of the HNSs. Effects of such surface functionalities on the crystalline, dielectric, and energy harvesting performances of the nanocomposites were systematically investigated to identify the optimal surface modifier to enhance the energy density of the nanocomposites. Consequently, these changes in crystallinity led to higher dielectric constants (ε´≈109.6) and energy density (Ue≈21.7 J cm–3) with highly retained breakdown strength (E=3.81×103 kV cm–1) compared to pristine PVDF (ε´≈11.6 and Ue ≈2.16 J cm–3 at 3.98×103 kV cm–1), indicating their potential as high energy density capacitors. |
| 저자 |
조성훈, 장정식
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| 소속 |
서울대 |
| 키워드 |
barium titanate; hollow nanosphere; surface treatment; poly(vinylidene fluoride); dielectric capacitor
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| E-Mail |
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