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<p>We prepare a poly (vinylidene fluoride-hexafluoropropylene) (P(VDF- HFP))-based nanocomposite, where the exfoliated boron nitride nanosheets (BNNS) are used as the inorganic fillers to introduce extra interfacial polarization into BNNS/P(VDF-HFP) composite film as well as improve its thermal stability. As such, the BNNS/P(VDF-HFP)5/95wt% composite exhibits a relative dielectric permittivity (<i>ε</i><sub>r</sub>) of 15, showing 60% higher than that of P(VDF-HFP). Furthermore, the recoverable energy density (<i>W</i><sub>rec</sub>) of the composite first increases the then decreases with BNNS, and reach a high value of 2.43&#xa0;J/cm<sup>3</sup> in BNNS/P(VDF-HFP)5/95wt%. Interestingly, this composite shows an improving thermal stability due to that BNNS restricts the thermal motion of polymer chains, strengthens the interfacial bonding, and inhibits the diffusion of heat and decomposition products. This offers an effective strategy for their application in high-temperature environments and presenting novel research concepts for high-performance energy storage materials.</p>

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BNNS doping to improve the energy storage property and thermal stability of a P(VDF-HFP)-based nanocomposite

  • 期刊论文

  • 发表日期：

    2025年7月11日

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  • Huan Cao,
  • Yuanqing Chen,
  • Zi Yang,
  • Weimin Xia

摘要

We prepare a poly (vinylidene fluoride-hexafluoropropylene) (P(VDF- HFP))-based nanocomposite, where the exfoliated boron nitride nanosheets (BNNS) are used as the inorganic fillers to introduce extra interfacial polarization into BNNS/P(VDF-HFP) composite film as well as improve its thermal stability. As such, the BNNS/P(VDF-HFP)5/95wt% composite exhibits a relative dielectric permittivity (εr) of 15, showing 60% higher than that of P(VDF-HFP). Furthermore, the recoverable energy density (Wrec) of the composite first increases the then decreases with BNNS, and reach a high value of 2.43 J/cm3 in BNNS/P(VDF-HFP)5/95wt%. Interestingly, this composite shows an improving thermal stability due to that BNNS restricts the thermal motion of polymer chains, strengthens the interfacial bonding, and inhibits the diffusion of heat and decomposition products. This offers an effective strategy for their application in high-temperature environments and presenting novel research concepts for high-performance energy storage materials.