在基于分子的铁电体中实现巨大的机电转换系数。
Achievement of a giant electromechanical conversion coefficient in a molecule-based ferroelectric.
作者信息
Wang Bin, Li Zhirui, Tang Zhengxiao, Zhao Haixia, Long Lasheng, Zheng Lansun
机构信息
Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 Fujian China
出版信息
Chem Sci. 2024 Aug 28;15(37):15192-7. doi: 10.1039/d4sc04185b.
Molecule-based ferroelectrics are promising candidates for flexible self-powered power supplies (, piezoelectric generators (PEGs)). Although the large electromechanical conversion coefficients ( × ) of piezoelectrics are key to enhancing the performance of PEGs in their nonresonant states, it remains a great challenge to obtain molecule-based piezoelectrics with large × . Here, we report a molecule-based ferroelectric [(CH)NCHCHCl][GaBr] (1) that exhibits the largest piezoelectric coefficient (∼454 pC N) and electromechanical conversion coefficient (4953.1 × 10 m N) among all known free-standing polycrystalline pellets. Notably, the PEG comprising 15 wt% 1 and polydimethylsiloxane (PDMS) achieves a power density of up to 120 μW cm, marking the highest reported power density for ferroelectric@PDMS PEGs to date.
基于分子的铁电体是柔性自供电电源（即压电发电机（PEGs））的有前途的候选材料。尽管压电材料的大机电转换系数（ × ）是提高PEGs在非共振状态下性能的关键，但获得具有大 × 的基于分子的压电材料仍然是一个巨大的挑战。在此，我们报道了一种基于分子的铁电体[(CH)NCHCHCl][GaBr] (1)，在所有已知的独立多晶颗粒中，它表现出最大的压电系数（约454 pC N）和机电转换系数（4953.1 × 10 m N）。值得注意的是，由15 wt%的1和聚二甲基硅氧烷（PDMS）组成的PEG实现了高达120 μW cm的功率密度，这是迄今为止报道的铁电体@PDMS PEGs的最高功率密度。
Zotero 插件