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Laser Scribing of Fluorinated Polyimide Films to Generate Microporous Structures for High-Performance Micro-supercapacitor Electrodes
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-11-25 , DOI: 10.1021/acsaem.0c02096 Minsu Kim 1 , Min Guk Gu 2 , Heeyoung Jeong 1, 3 , Eunseok Song 2 , Jun Woo Jeon 1 , Kang-Moo Huh 3 , Pilgyu Kang 4 , Sung-Kon Kim 2 , Byoung Gak Kim 1, 5
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-11-25 , DOI: 10.1021/acsaem.0c02096 Minsu Kim 1 , Min Guk Gu 2 , Heeyoung Jeong 1, 3 , Eunseok Song 2 , Jun Woo Jeon 1 , Kang-Moo Huh 3 , Pilgyu Kang 4 , Sung-Kon Kim 2 , Byoung Gak Kim 1, 5
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Laser-induced graphene (LIG) typically exhibits a mesostructure with a small specific surface area, which is detrimental to the electrochemical performance of micro-supercapacitors (MSCs). Herein, 3D nanostructured LIGs patterned on fluorinated polyimides (fPIs) via a laser photothermal method are reported. During laser-induced graphitization, a highly microporous structure in the LIG develops. Consequently, the patterned LIG (LIG-fPI) exhibits a very large specific surface area (1126.0 m2 g–1), thereby enhancing its electrochemical performance. Specifically, in an H2SO4 aqueous electrolyte, the micropatterned electrode exhibits an exceptional areal capacitance of 110 mF cm–2 (determined by cyclic voltammetry), which is 27 times higher than that of a LIG based on commercial polyimides and at least 7 times higher than that of current state-of-the-art MSCs. Furthermore, mechanically stable and flexible LIG-fPI-MSCs with an organic gel polymer electrolyte (working potential = ∼3 V) show very high power and energy densities of 0.58 mW cm–2 and 0.01 mW h cm–2, respectively. Thus, these LIGs are promising for application in high-performance MSCs for flexible microelectronics.
中文翻译：
激光划刻氟化聚酰亚胺薄膜以生成用于高性能微型超级电容器电极的微孔结构
激光诱导石墨烯（LIG）通常表现出具有较小比表面积的介观结构，这不利于微超级电容器（MSC）的电化学性能。在此，报道了通过激光光热法在氟化聚酰亚胺（fPI）上构图的3D纳米结构LIG。在激光诱导的石墨化过程中，LIG中会形成高度微孔的结构。因此，图案化的LIG（LIG-fPI）表现出非常大的比表面积（1126.0 m 2 g –1），从而增强了其电化学性能。具体而言，在H 2 SO 4水性电解质中，微图案化电极表现出110 mF cm –2的出色面电容（由循环伏安法测定），比基于商用聚酰亚胺的LIG高27倍，比目前最新的MSC高至少7倍。此外，具有有机凝胶聚合物电解质（工作电势=约3 V）的机械稳定和灵活的LIG-fPI-MSC分别具有非常高的功率密度和能量密度，分别为0.58 mW cm -2和0.01 mW h cm -2。因此，这些LIG有望用于柔性微电子的高性能MSC中。
更新日期：2021-01-25
中文翻译：
激光划刻氟化聚酰亚胺薄膜以生成用于高性能微型超级电容器电极的微孔结构
激光诱导石墨烯（LIG）通常表现出具有较小比表面积的介观结构，这不利于微超级电容器（MSC）的电化学性能。在此，报道了通过激光光热法在氟化聚酰亚胺（fPI）上构图的3D纳米结构LIG。在激光诱导的石墨化过程中，LIG中会形成高度微孔的结构。因此，图案化的LIG（LIG-fPI）表现出非常大的比表面积（1126.0 m 2 g –1），从而增强了其电化学性能。具体而言，在H 2 SO 4水性电解质中，微图案化电极表现出110 mF cm –2的出色面电容（由循环伏安法测定），比基于商用聚酰亚胺的LIG高27倍，比目前最新的MSC高至少7倍。此外，具有有机凝胶聚合物电解质（工作电势=约3 V）的机械稳定和灵活的LIG-fPI-MSC分别具有非常高的功率密度和能量密度，分别为0.58 mW cm -2和0.01 mW h cm -2。因此，这些LIG有望用于柔性微电子的高性能MSC中。
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