Next-generation portable flexible electronic appliances require liquid-free energy storage supercapacitor devices to eliminate leakage and to support mechanical bending that is compatible with roll-to-roll technologies. Hence, a state-of-the-art process is presented to design a solid-state, wide-potential and flexible supercapacitor through the use of nano-pebbles of cerium selenide via a simple successive ionic layer adsorption and reaction (SILAR) method that could allow an industry scalable route. We strongly believe that this is the first approach amongst physical and chemical routes not only for synthesizing cerium selenide in thin-film form but also using it for device-grade supercapacitor applications. The designed solid-state symmetric supercapacitor assembled from cerium selenide electrodes sandwiched by PVA–LiClO₄ gel electrolyte attains a wide potential window of 1.8 V with capacitance of 48.8 F g⁻¹ at 2 mV s⁻¹ and reveals excellent power density of 4.89 kW kg⁻¹ at an energy density of 11.63 W h kg⁻¹. The formed device is capable of 87% capacitive retention even at a mechanical bending angle of 175°. Lighting up a strip of 21 parallel connected red LEDs clearly demonstrates the practical use of the designed symmetric solid-state supercapacitor, aiming towards the commercialization of the product in the future.

中文翻译：

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硒化铈纳米卵石的电化学动力学：器件级对称配置宽电位柔性固态超级电容器的设计

下一代便携式柔性电子设备需要无液体储能超级电容器设备来消除泄漏并支持与卷对卷技术兼容的机械弯曲。因此，提出了一种最先进的工艺，通过使用硒化铈纳米卵石设计一种固态、宽电势和柔性超级电容器。一种简单的连续离子层吸附和反应（SILAR）方法，可以实现工业可扩展路线。我们坚信这是物理和化学路线中的第一种方法，不仅可以合成薄膜形式的硒化铈，而且可以将其用于设备级超级电容器应用。设计的固态对称超级电容器由夹在 PVA-LiClO ₄凝胶电解质中的硒化铈电极组装而成，具有 1.8 V 的宽电位窗口，在 2 mV s ^{-1时电容为 48.8 F g -1} ，并显示出出色的功率密度 4.89 kW kg ^-1能量密度为 11.63 Wh kg ^-1. 即使在 175° 的机械弯曲角下，所形成的器件也能够保持 87% 的电容保持率。点亮一条由 21 个并联的红色 LED 组成的灯带，清楚地展示了所设计的对称固态超级电容器的实际用途，旨在实现该产品未来的商业化。