多巴胺改性0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3填料在PVDF纳米复合材料中作为柔性储能和采集器的性能
Performance of dopamine modified 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3 filler in PVDF nanocomposite as flexible energy storage and harvester
AI总结：
该研究通过溶液浇铸法制备多巴胺改性BCT-BZT填料的PVDF复合材料，利用多巴胺桥接作用改善填料分散与介电性能，实现高击穿强度、储能密度及压电采集性能，证明其在柔性储能与能量采集领域的双重应用潜力。
摘要：
我们展示了通过溶液浇铸法制备的多巴胺改性0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3填料掺入聚偏氟乙烯（PVDF）复合材料作为柔性储能和采集器件的潜力。在填料表面功能化中引入多巴胺作为填料和聚合物基体之间的桥接元素，实现了更好的填料分散和改善的介电损耗角正切（<0.02），同时介电常数在9到34范围内，这有利于能量采集和存储。此外，所有复合材料均实现了显著低的直流电导率（<10-9 ohm-1cm-1），从而提高了击穿强度和电荷积累能力。在填料含量为10重量%时，获得了最大击穿强度134 KV/mm和相应的储能密度0.72 J/cm3。改进的能量采集性能通过获得最大压电电荷常数（d33）=78 pC/N和输出电压（Vout）=0.84 V以及填料含量为10 wt%时的最大功率密度3.46 microW/cm3来表征。因此，结果表明0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3/PVDF复合材料具有同时用于储能和采集应用的潜力，可以显著抑制使用不同材料时产生的过量能量损失。
英文摘要：
We demonstrate the potential of dopamine modified 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3 filler incorporated poly-vinylidene fluoride (PVDF) composite prepared by solution cast method as both flexible energy storage and harvesting devices. The introduction of dopamine in filler surface functionalization acts as bridging elements between filler and polymer matrix and results in a better filler dispersion and an improved dielectric loss tangent (<0.02) along with dielectric permittivity ranges from 9 to 34 which is favorable for both energy harvesting and storage. Additionally, a significantly low DC conductivity (< 10-9 ohm-1cm-1) for all composites was achieved leading to an improved breakdown strength and charge accumulation capability. Maximum breakdown strength of 134 KV/mm and corresponding energy storage density 0.72 J/cm3 were obtained from the filler content 10 weight%. The improved energy harvesting performance was characterized by obtaining a maximum piezoelectric charge constant (d33) = 78 pC/N, and output voltage (Vout) = 0.84 V along with maximum power density of 3.46 microW/cm3 for the filler content of 10 wt%. Thus, the results show 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3/PVDF composite has the potential for energy storage and harvesting applications simultaneously that can significantly suppress the excess energy loss arises while utilizing different material.
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