Bera Sumit, Thantirige Rukshan, Kadam Sujit A, Sumant Anirudha V, Pradhan Nihar R
Department of Chemistry, Physics and Atmospheric Science, Jackson State University, 1400 John R. Lynch Street, Jackson, MS 39217, USA.
Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA.
Molecules. 2024 Oct 1;29(19):4671. doi: 10.3390/molecules29194671.
The ubiquitous, rising demand for energy storage devices with ultra-high storage capacity and efficiency has drawn tremendous research interest in developing energy storage devices. Dielectric polymers are one of the most suitable materials used to fabricate electrostatic capacitive energy storage devices with thin-film geometry with high power density. In this work, we studied the dielectric properties, electric polarization, and energy density of PMMA/2D Mica nanocomposite capacitors where stratified 2D nanofillers are interfaced between the multiple layers of PMMA thin films using two heterostructure designs of the capacitors, PMMA/2D Mica/PMMA (PMP) and PMMA/2D Mica/PMMA/2D Mica/PMMA (PMPMP). The incorporation of a 2D Mica nanofiller in the low-dielectric-constant PMMA leads to an enhancement in the dielectric constant, with ∆ε ~ 15% and 53% for PMP and PMPMP heterostructures at room temperature. Additionally, a significant improvement in discharged energy density was measured for the PMPMP capacitor (U ~ 38 J/cm at 825 MV/m) compared to the pristine PMMA (U ~ 9.5 J/cm at 522 MV/m) and PMP capacitors (U ~ 19 J/cm at 740 MV/m). This excellent capacitive and energy storage performance of the PMMA/2D Mica heterostructure nanocomposite may inform the fabrication of thin-film, high-density energy storage capacitor devices for potential applications in various platforms.
对具有超高存储容量和效率的储能设备的普遍且不断增长的需求，引发了人们对开发储能设备的巨大研究兴趣。介电聚合物是用于制造具有高功率密度的薄膜几何形状的静电电容式储能设备的最合适材料之一。在这项工作中，我们研究了PMMA/二维云母纳米复合电容器的介电性能、电极化和能量密度，其中分层的二维纳米填料使用两种电容器异质结构设计，即PMMA/二维云母/PMMA（PMP）和PMMA/二维云母/PMMA/二维云母/PMMA（PMPMP），连接在PMMA薄膜的多层之间。在低介电常数的PMMA中加入二维云母纳米填料会导致介电常数提高，室温下PMP和PMPMP异质结构的∆ε分别约为15%和53%。此外，与原始PMMA（在522 MV/m下U约为9.5 J/cm³）和PMP电容器（在740 MV/m下U约为19 J/cm³）相比，PMPMP电容器的放电能量密度有显著提高（在825 MV/m下U约为38 J/cm³）。PMMA/二维云母异质结构纳米复合材料的这种优异的电容和储能性能，可能为制造用于各种平台潜在应用的薄膜、高密度储能电容器设备提供参考。
