期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 50, 页码 56424-56434出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c16197
关键词
coaxial spinning; ferroconcrete-like structure; linear/ferroelectric micro-interfaces; energy storage density; energy efficiency
资金
- National Natural Science Foundation of China [51977050, 51807042, 51807041]
- Natural Science Foundation of Heilongjiang Province of China [ZD2020E009, TD2019E002]
- China Postdoctoral Science Foundation [2018M640302]
- Heilongjiang Postdoctoral Financial Assistance [LBHZ18098]
- Fundamental Research Foundation for Universities of Heilongjiang Province [LGYC2018TD001, LGYC2018JC019]
Ferroelectric polymers are regarded as the preferred material in dielectric energy storage devices because of their high dielectric constant. However, their relatively low breakdown strength and efficiency restrict their practical application. This work combines coaxial spinning and hot pressing to compound the highly insulating linear poly(methyl methacrylate) (PMMA) and ferroelectric poly(vinylidene fluoride) (PVDF) to obtain a PMMA/PVDF all-organic film with a ferroconcrete-like structure. Further, improvements in the energy storage performance over those of the pristine polymer were achieved via modulation of the PMMA to PVDF ratio. The 45% PMMA/PVDF film had an energy storage density of 17.7 J/cm(3) and an energy efficiency of 73% at 640 kV/mm. Moreover, 51% PMMA/PVDF exhibited the best energy storage density (U = 20.7 J/cm(3), eta = 63% at 630 kV/mm). This work, therefore, provides a new idea for the design of allorganic polymer films for the field of energy storage.
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