Cathode anode diagram
In this study, we developed a flexible macroscopic and continuous fiber in an unusual ribbon shape composed solely of Ti3C2 sheets, a typical member of the MXene family. Two‐dimensional sheets are known to be excellent units for assembling fiber entities, particularly when sheets are oriented in a stacking manner, which helps integrate their intrinsic in‐plane advantages, especially those related with mechanical and electronic performances.
#Cathode anode diagram portable
In addition, we attempt to elucidate recent studies in energy-storing fibers and their implication in self-powered and fully wireless wearable devices.įlexible and wearable fiber electrodes with high conductivity and acceptable electrochemical behavior are crucial for extending the application of next‐generation portable electronics, the development of which, however, is very challenging. Pressure and strain sensors and their implementation as electronic skins will be explored, along with other various fiber sensors capable of imaging objects or monitoring safety and health markers. This review summarizes the recent applications of fibers and fiber-based textiles in mechanical, photonic, and biomedical sensors. Similarly, for the wearable devices to be more accessible, it is crucial to incorporate energy harvesting and storage systems into the device themselves, removing the need to attach an external power source. At the same time, their flexible and lightweight properties allow more convenient and user-friendly experiences to the wearers.
#Cathode anode diagram skin
Wearable sensors utilize a tight interface with human skin and clothes for continuous environmental scanning and non-invasive health monitoring. These properties are especially desired in the fields of bio-related sensors and energy-storage systems. Furthermore, fibers and fiber-based textiles can be 3D-molded with ease and potentially integrated with everyday clothes or accessories. Particularly, fiber-based electronics are considered to be ideal for many applications for their flexibility, lightweight, breathability, and comfortability. Wearable electronics have been receiving increasing attention for the past few decades. The cycling stability and mechanical flexibility were also tested, which demonstrated the prospects for practical application.
Thanks to the special structure of the active materials and the fast redox reaction, the assembled flexible Ni/Fe battery achieved high electrochemical properties with a maximum volumetric specific capacity of 1.61 mA h cm-3 and energy density of 1.28 mW h cm-3. A flexible Ni/Fe battery is successfully fabricated using the aforementioned anode coupled with a NiCoO-based cathode which is synthesized by electrodeposition and a post-annealing process. Due to the heterogeneous structure, the active materials depicted improved electron/ion transfer, boosting the electrochemical performance of the anode. A fast microwave-assisted synthesis method was adopted to grow active materials with a 3D conductive network which is constructed from carbon nanotubes decorated with Fe-Fe3C nanoparticles. Herein, we focused on studying binder-free fibrous electrodes for high-performance FESDs based on rechargeable Ni/Fe batteries. However, their energy density is still far from satisfactory, hindering further practical applications.
Aqueous rechargeable Ni/Fe batteries are an appropriate candidate due to the cost-effectiveness, high ionic conductivity, and great safety. Fiber-shaped energy storage devices (FESDs) are indispensable for developing portable and wearable electronic products.