Krishnamoorthy Karthikeyan, Pazhamalai Parthiban, Mariappan Vimal Kumar, Nardekar Swapnil Shital, Sahoo Surjit, Kim Sang-Jae
Nanomaterials and System Laboratory, Major of Mechatronics Engineering, Faculty of Applied Energy System, Jeju National University, Jeju, 63243, South Korea.
Department of Advanced Convergence Science & Technology, Jeju National University, Jeju, 63243, South Korea.
Nat Commun. 2020 May 11;11(1):2351. doi: 10.1038/s41467-020-15808-6.
The design and development of self-charging supercapacitor power cells are rapidly gaining interest due to their ability to convert and store energy in an integrated device. Here, we have demonstrated the fabrication of a self-charging supercapacitor using siloxene sheets as electrodes and siloxene-based polymeric piezofiber separator immobilized with an ionogel electrolyte. The self-charging properties of the fabricated device subjected to various levels of compressive forces showed their ability to self-charge up to a maximum of 207 mV. The mechanism of self-charging process in the fabricated device is discussed via "piezoelectrochemical effect" with the aid of piezoelectrochemical spectroscopy measurements. These studies revealed the direct evidence of the piezoelectrochemical phenomenon involved in the energy conversion and storage process in the fabricated device. This study can provide insight towards understanding the energy conversion process in self-charging supercapacitors, which is of significance considering the state of the art of piezoelectric driven self-charging supercapacitors.
自充电超级电容器能量单元的设计与开发因其能够在集成设备中转换和存储能量而迅速引起关注。在此，我们展示了一种自充电超级电容器的制造方法，该超级电容器使用硅氧烯片作为电极，并使用固定有离子凝胶电解质的硅氧烯基聚合物压电纤维分离器。对制造的器件施加不同水平的压缩力时，其自充电特性表明其能够自充电至最大207 mV。借助压电电化学光谱测量，通过“压电电化学效应”讨论了制造器件中自充电过程的机制。这些研究揭示了制造器件中能量转换和存储过程中涉及的压电电化学现象的直接证据。这项研究可为理解自充电超级电容器中的能量转换过程提供见解，考虑到压电驱动自充电超级电容器的现有技术水平，这具有重要意义。
