期刊
ADVANCED MATERIALS
卷 30, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201707269
关键词
anisotropic materials; dielectrics; energy density; nanocomposites; nanostructures
类别
资金
- National Basic Research Program of China [2015CB654603]
- Basic Science Center Program of NSFC [51788104]
- Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0264]
- NSF of China [51572141, 51625202, 51532003]
- Research Fund of Science and Technology in Shenzhen [JSGG20150331155519130]
Manipulating microstructures of composites in three dimensions has been a long standing challenge. An approach is proposed and demonstrated to fabricate artificial nanocomposites by controlling the 3D distribution and orientation of oxide nanoparticles in a polymer matrix. In addition to possessing much enhanced mechanical properties, these nanocomposites can sustain extremely high voltages up to approximate to 10 kV, exhibiting high dielectric breakdown strength and low leakage current. These nanocomposites show great promise in resolving the paradox between dielectric constant and breakdown strength, leading to ultrahigh electrical energy density (over 2000% higher than that of the bench-mark polymer dielectrics) and discharge efficiency. This approach opens up a new avenue for the design and modulation of nanocomposites. It is adaptable to the roll-to-roll fabrication process and could be employed as a general technique for the mass production of composites with intricate nanostructures, which is otherwise not possible using conventional polymer processing techniques.
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