3. All Types of Flexible Solid-State Supercapacitors

Nowadays, flexible solid-state supercapacitors (FSSCs) are the most emerging energy storage devices in modern miniatured technologies. With increasing the use of micro- and flexible electronic devices such as wearable electronic suits, microsensors, and biomedical equipment, the demand of FSSCs is increasing exponentially. These electronic devices focused on the integration of many components in single compact system that must be flexible in nature, lightweight, smaller in dimension, unbreakable and should be available at competitive price. Although the FSSCs device fabrication is in the early stage of development, there is a significant effort to investigate the new strategies to fulfill the demand of advanced energy technology. Therefore, exploring the novel approaches always remains an important academic and industrial challenge to the researchers. The chapter mainly focuses on the advancement of FSSCs devices with its all components such as current collector, electrode materials, and electrolytes. The chapter also discusses the strategies of fabrication techniques, types of FSSCs, design, evaluation of performance of FSSCs device step by step. Hence, the chapter gives an idea about the recent progress and challenges of the FSSCs devices.