Ghosh, Sujoy Kumar and Rahman, Wahida and Middya, Tapas Ranjan and Sen, Shrabanee and Mandal, Dipankar (2016) Improved breakdown strength and electrical energy storage performance of gamma-poly (vinylidene fluoride)/unmodified montmorillonite clay nano-dielectrics. Nanotechnology, 27 (21). Article No-215401. ISSN 0957-4484

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A remarkable improvement in the dielectric breakdown strength (E-b) and discharge energy density (U-e) of flexible polymer nanocomposites is realized by the incorporation of unmodified smectite montmorillonite (MMT) nanoclay into a poly(vinylidene fluoride) (PVDF) matrix. The resulting PVDF/MMT clay nanocomposite (PCN) films stabilize the. phase and increase the path tortuosity via strong intercalation of the PVDF matrix into inorganic layered silicates without sacrificing the quality of surface morphology. The PCN films exhibits superior dielectric properties (up to epsilon(r) similar to 28 and tan delta similar to 0.032 at 1 kHz) than those of pure PVDF. As a result, a large increase in E-b of 873 MV m(-1) and U-e of 24.9 J cm(-3) is achieved. Subsequently, the PCN films possess more than 60% charge-discharge efficiency even at higher electric field and thus provide a scope to develop high energy density flexible and transparent materials for energy storage technologies.

Item Type: Article
Subjects: Electronics
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 10 Nov 2016 07:32
Last Modified: 10 Nov 2016 07:32

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