Wang Jinhui, Bandari Vineeth Kumar, Karnaushenko Daniil, Li Yang, Li Fei, Zhang Panpan, Baunack Stefan, Karnaushenko Dmitriy D, Becker Christian, Faghih Maryam, Kang Tong, Duan Shengkai, Zhu Minshen, Zhuang Xiaodong, Zhu Feng, Feng Xinliang, Schmidt Oliver G
Material Systems for Nanoelectronics , Chemnitz University of Technology , 09107 Chemnitz , Germany.
Institute for Integrative Nanosciences , Leibniz IFW Dresden , 01069 Dresden , Germany.
ACS Nano. 2019 Jul 23;13(7):8067-8075. doi: 10.1021/acsnano.9b02917. Epub 2019 Jul 5.
Inspired by origami art, we demonstrate a tubular microsupercapacitor (TMSC) by self-assembling two-dimensional (2D) films into a "swiss roll" structure with greatly reduced footprint area. A polymeric framework consisting of swelling hydrogel and polyimide layers ensures excellent ion transport between poly(3,4-ethylenedioxythiophene) (PEDOT)-based electrodes and provides efficient self-protection of the TMSC against external compression up to about 30 MPa. Such TMSCs exhibit an areal capacitance of 82.5 mF cm at 0.3 mA cm with a potential window of 0.8 V, an energy density and power density of 7.73 μWh cm and 17.8 mW cm (0.3 and 45 mA cm), and an improved cycling stability with a capacitance retention up to 96.6% over 5000 cycles. Furthermore, as-fabricated TMSC arrays can be detached from their surface and transferred onto target substrates. The connection of devices in parallel/series greatly improves their capacity and voltage output. Overall, our prototype devices and fabrication methodology provide a promising route to create integratable microscale tubular energy storage devices with an efficient self-protection function and high performance for future miniaturized electronics.
受折纸艺术启发，我们通过将二维（2D）薄膜自组装成“瑞士卷”结构，展示了一种管状微型超级电容器（TMSC），其占地面积大大减小。由膨胀水凝胶和聚酰亚胺层组成的聚合物框架确保了基于聚（3,4 - 乙撑二氧噻吩）（PEDOT）的电极之间具有出色的离子传输，并为TMSC提供了高达约30 MPa的外部压缩下的有效自我保护。这种TMSC在0.3 mA cm时的面积电容为82.5 mF cm，电位窗口为0.8 V，能量密度和功率密度分别为7.73 μWh cm和17.8 mW cm（0.3和45 mA cm），并且具有改善的循环稳定性，在5000次循环中电容保持率高达96.6%。此外，制备好的TMSC阵列可以从其表面分离并转移到目标基板上。器件的并联/串联连接大大提高了它们的容量和电压输出。总体而言，我们的原型器件和制造方法为创建具有高效自我保护功能和高性能的可集成微尺度管状储能器件提供了一条有前景的途径，以用于未来的小型化电子产品。
