Advance Technologies in Biodegradable Flexible Solid-State Supercapacitors: A Mini Review on Clean and Sustainable Energy

In the recent times research towards solid state supercapacitors (SSS) have increased drastically due to the promising performance in futuristic technologies particularly in portable and flexible electronics like smart watches, smart fabrics, foldable smartphones and tablets. Also, when compared to supercapacitors using liquid electrolyte, solid electrolyte has several advantages like high energy density, safety, high cycle life, flexible form factor, and less environmental impact. The crucial factor determining the sustainability of a technology is the eco-friendliness since the natural resources are being exploited in a wide scale. Numerous studies have focused on biodegradable materials for supercapacitor electrodes, electrolytes, and other inactive components. Making use of these biodegradable materials to design a SSS enables the technology to sustain for a very long time since biodegradable materials are not only environment friendly but also, they show relatively high performance. This review focuses on recent progress of different biodegradable electrodes, and electrolytes along with their properties, electrochemical performance and biodegradable capabilities for SSS have been analyzed and provides a concise summary enabling readers to understand the importance of biodegradable materials and to narrow down the research in a more rational way. Solid-state supercapacitors (SSS) have congregated researchers and industries because of unique features such as flexible, lightweight, compact size, easy to handle. The wide range of temperature and potential window is bonus benefit for its practical applications. This also solves the safety issues in the liquid electrolyte based supercapacitors. The current collector, mechanically and chemically stable electrodes and semisolid or solid electrolytes plays a vital role in fabricating SSS. Apart from that, the biodegradable SSS are blessings for the sustainable environment as technically advance and eco-friendly. In this regard, we have focused on the latest advancement in SSS including its fabrication, various electrodes and electrolytes used to develop SSS. This review also discuss the pros and cons on SSS and future opportunities of these in energy market.image