Chen Zhenying, Chen Yuanhai, Zhao Yazhen, Qiu Feng, Jiang Kaiyue, Huang Senhe, Ke Changchun, Zhu Jinhui, Tranca Diana, Zhuang Xiaodong
The meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, P. R. China.
Langmuir. 2021 Feb 23;37(7):2523-2531. doi: 10.1021/acs.langmuir.0c03635. Epub 2021 Feb 11.
Microsupercapacitors (MSCs) have drawn great attention for use as miniaturized electrochemical energy storage devices in portable, wearable, as well as implantable electronics. Many materials have been developed as electrodes for MSCs. However, the thin-film fabrication for most of these materials involves multistep operations, including filtration, spray coating, and sputtering. Most importantly, these methods present challenges for the preparation of thin films at the atomic or molecular scale. Therefore, the understanding of performance of ultrathin-film-based MSCs remains challenge. Herein, a B/N-enriched polymer film is successfully prepared using the photoassisted interfacial approach. The as-synthesized polymer film exhibits typical semiconductive characteristics and can be easily scaled up to a large area of up to tens of square centimeters. This ultrathin polymer film can be directly transferred to silicon wafers to fabricate MSC through laser scribing. The prepared MSC exhibits specific volumetric capacitance as high as 20.9 F cm, corresponding to volumetric energy density of 2.9 mWh cm (at 0.1 V s). Moreover, the volumetric power density can reach 1461 W cm, surpassing most existing semiconductive polymer film-based MSC devices. In addition, the prepared MSC exhibits typical AC line-filtering ability (-67° at 120 Hz). This study offers a facile interfacial approach to preparing semiconductive polymer films with aromatic moieties for microsized energy storage devices.
微型超级电容器（MSC）作为便携式、可穿戴以及可植入电子设备中的小型化电化学储能器件，已引起了广泛关注。许多材料已被开发用作MSC的电极。然而，大多数这些材料的薄膜制备涉及多步操作，包括过滤、喷涂和溅射。最重要的是，这些方法在原子或分子尺度上制备薄膜存在挑战。因此，理解基于超薄薄膜的MSC的性能仍然具有挑战性。在此，使用光辅助界面方法成功制备了富含B/N的聚合物薄膜。所合成的聚合物薄膜表现出典型的半导体特性，并且可以轻松扩大到数十平方厘米的大面积。这种超薄聚合物薄膜可以通过激光划刻直接转移到硅片上以制造MSC。所制备的MSC表现出高达20.9 F/cm³的比体积电容，对应于2.9 mWh/cm³的体积能量密度（在0.1 V/s时）。此外，体积功率密度可以达到1461 W/cm³，超过了大多数现有的基于半导体聚合物薄膜的MSC器件。此外，所制备的MSC表现出典型的交流线路滤波能力（在120 Hz时为-67°）。本研究提供了一种简便的界面方法，用于制备具有芳香族部分的半导体聚合物薄膜，用于微型储能器件。
