| 학회 | 한국재료학회 |
| 학술대회 | 2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 | 24권 1호 |
| 발표분야 | 2. 유전체/압전체의 도전과 미래(Challenges and Future for Dielectrics and Piezoelectrics)-오거나이저: 이순일 교수(창원대) |
| 제목 | Functional dielectric nanocomposites for pulse energy storage |
| 초록 | The dielectric materials are capable of storing the electric energy due to its polarization in the presence of external electric field, causing positive charge to store on one electrode and negative charge on the other. With this manner, the dielectric energy-storing devices enable faster delivery of energy (i.e. shorter charge or discharge time), and thus can be found promising applications on hybrid electric vehicles and pulse power devices. To design a proper dielectric material for the energy storage application, three requirements have to be satisfied at the same time: large saturated polarization, small remnant polarization, and high electrical breakdown strength. Approaching methodology, materials synthesis and characterizations in the research activities on this subject are being extensively introduced and discussed with special emphasis on the improved dielectric stability of the newly designed 2-dimensional ceramic nanosheets based nanocomposites. As 2-D nanofillers, atomically thin oxide nanosheets of aluminosilicate were prepared by exfoliation of layered aluminosilicate mineral, muscovite (KAl3Si3O10(OH)2). Wet chemical exfoliation process for layered aluminosilicates, which have severe layer charge deficiency and low cation exchange capacity, was optimized to fabricate atomically thin oxide nanosheets with micrometer-scale lateral sizes. The amphiphilic polymer assisted exfoliation using intercalation of PVDF molecule was very effective to achieve nanosheets in lateral size of 5-10 um and thickness of about 1-2 nm. The resulting aluminosilicate nanosheets exhibited homogeneous dispersion and strong interfacial adhesion in the ferroelectric polymer matrix, leading to an enhancement of dielectric properties stability at elevated temperatures for corresponding polymer based dielectric materials. |
| 저자 | 권도균, 고유민, 배현정, 조현승, 송태영 |
| 소속 | 한국항공대 |
| 키워드 | dielectric; nanocomposite; nanosheets; energy density |
