Chemistry and Physics of Materials Unit and Thematic Unit of Excellence in Nanochemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore, 560064, India.
Centre for Nano and Soft Matter Sciences, Jalahalli, Bangalore, 560013, India.
Small. 2017 Oct;13(40). doi: 10.1002/smll.201701906. Epub 2017 Aug 21.
Transparent and flexible energy storage devices have received immense attention due to their suitability for innovative electronics and displays. However, it remains a great challenge to fabricate devices with high storage capacity and high degree of transmittance. This study describes a simple process for fabrication of supercapacitors with ≈75% of visible transparency and areal capacitance of ≈3 mF cm with high stability tested over 5000 cycles of charging and discharging. The electrodes consist of Au wire networks obtained by a simple crackle template method which are coated with MnO nanostructures by electrodeposition process. Importantly, the membrane separator itself is employed as substrate to bring in the desired transparency and light weight while additionally exploiting its porous nature in enhancing the interaction of electrolyte with the active material from both sides of the substrate, thereby enhancing the storage capacity. The method opens up new ways for fabricating transparent devices.
透明且柔韧的储能器件因其适用于创新型电子设备和显示器而受到广泛关注。然而，制造具有高存储容量和高透明度的器件仍然是一个巨大的挑战。本研究描述了一种简单的工艺，用于制造具有≈75%可见光透明度和约 3 mF cm²面电容的超级电容器，经过 5000 次充放电循环测试，稳定性高。电极由通过简单的裂纹模板法获得的金丝网络组成，通过电沉积过程涂覆 MnO 纳米结构。重要的是，将膜分离器本身用作基底，以带来所需的透明度和轻重量，同时利用其多孔性质从基底两侧增强电解质与活性材料的相互作用，从而提高存储容量。该方法为制造透明器件开辟了新途径。
