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Optimizing the Interdomain Spacing in Alicyclic Polythiourea toward High-Energy-Storable Dielectric Material.
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-05-27 , DOI: 10.1002/marc.202000167 Yang Feng 1 , Liuqing Yang 1 , Guanghao Qu 1 , Takeo Suga 2, 3 , Hiroyuki Nishide 2, 3 , George Chen 1 , Shengtao Li 1
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-05-27 , DOI: 10.1002/marc.202000167 Yang Feng 1 , Liuqing Yang 1 , Guanghao Qu 1 , Takeo Suga 2, 3 , Hiroyuki Nishide 2, 3 , George Chen 1 , Shengtao Li 1
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Organic dielectric materials have been widely developed and investigated for energy storage capacitors. However, challenges remain in terms of the relatively low dielectric constant and energy density. Enhancing the dipolar polarization to increase the dielectric constant is considered to be an effective way to improve the energy density of polymer dielectrics. Herein, enlightened by the chain‐packing structure that affects the dipolar relaxation behavior, a simple and low‐cost approach is proposed to tailor the interdomain spacing in an alicyclic polythiourea (PTU) by changing quenching temperatures and further facilitate the dipolar polarization. It is found that the large interdomain spacing is beneficial to promote the localized motion of segmental chains in amorphous regions, but at the same time inevitably reduces the dipole density. Therefore, in order to achieve the highest dielectric constant in the PTU, there is an optimal value for the interdomain spacing. It is worth noting that the dielectric constant of PTU increases from 5.7 to 10, and thus the energy density increases by 53% to 16.3 J cm−3. It proposes a simple and feasible strategy to further improve the energy density through optimizing the interdomain spacing toward high‐energy‐storable dielectric material.
中文翻译：
优化脂环族聚硫脲对高能存储介电材料的域间间距。
有机介电材料已经被广泛开发和研究用于储能电容器。然而，相对较低的介电常数和能量密度仍然是挑战。增强偶极极化以增加介电常数被认为是提高聚合物电介质能量密度的有效方法。在此，受影响偶极弛豫行为的链堆积结构的启发，提出了一种简单且低成本的方法，通过改变淬灭温度来调整脂环族聚硫脲（PTU）中的域间间距，并进一步促进偶极极化。发现较大的域间间隔有利于促进无定形区域中节段链的局部运动，但同时不可避免地降低了偶极子密度。因此，为了在PTU中获得最高的介电常数，域间间隔存在一个最佳值。值得注意的是，PTU的介电常数从5.7增加到10，因此能量密度增加了53％，达到16.3 J cm−3。它提出了一种简单可行的策略，通过优化朝向高能存储介电材料的域间距来进一步提高能量密度。
更新日期：2020-07-13
中文翻译：
优化脂环族聚硫脲对高能存储介电材料的域间间距。
有机介电材料已经被广泛开发和研究用于储能电容器。然而，相对较低的介电常数和能量密度仍然是挑战。增强偶极极化以增加介电常数被认为是提高聚合物电介质能量密度的有效方法。在此，受影响偶极弛豫行为的链堆积结构的启发，提出了一种简单且低成本的方法，通过改变淬灭温度来调整脂环族聚硫脲（PTU）中的域间间距，并进一步促进偶极极化。发现较大的域间间隔有利于促进无定形区域中节段链的局部运动，但同时不可避免地降低了偶极子密度。因此，为了在PTU中获得最高的介电常数，域间间隔存在一个最佳值。值得注意的是，PTU的介电常数从5.7增加到10，因此能量密度增加了53％，达到16.3 J cm−3。它提出了一种简单可行的策略，通过优化朝向高能存储介电材料的域间距来进一步提高能量密度。
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