Recent progress in fibrous high-entropy energy harvesting devices for wearable applications

Several materials have attracted attention for potential applications in electronic devices due to their desirable properties, including high power density, extended cycle life, and optimal charge/discharge rate. Hence, it is essential to develop high-efficiency, eco-friendly and effective materials. Due to technological advancements, supercapacitors are produced with high flexibility, which is very effective in achieving both flexibility and high energy storage capacity. The distinguishing point of flexible supercapacitors is their ability to bend, twist, and conform to various shapes and surfaces, enabling integration into flexible and wearable electronics. Composite materials used in flexible supercapacitors typically consist of a combination of conductive materials, such as graphene and a flexible polymer matrix. The flexibility of the polymer matrix enables the device to bend, making it ideal for integration into wearable devices and flexible electronics. In addition, metal oxides offer a wide range of choices for flexible supercapacitor electrodes. Different metal oxides such as ruthenium oxide (RuO2), manganese oxide (MnO2), and nickel oxide (NiO) play significant roles in the development of flexible supercapacitors due to the high specific capacitance. In the present review, we will discuss the tremendous potentialities of various composites applications in flexible supercapacitors. We will show flexible supercapacitors and their impact on supercapacitor performance. Then based on different nanostructures, we summarize the recent findings in electrode materials of flexible supercapacitors. The purpose of this study is to provide the reader with an overview of various flexible electrode composite materials and recent developments. 

Developed composites materials for flexible supercapacitors electrode: “Recent progress & future aspects”

Surface sulfidation of NiCo-layered double-hydroxide nanosheets for flexible all-solid-state fiber-shaped asymmetric supercapacitors

Ever-increasing quality of life demands low-power and reliable gas-sensing technology for point-of-care monitoring of human health by relevant breath biomarkers. However, precise identification is rather challenging due to the relatively small concentration and an abundance of interferents. Herein, a breath sensor that can detect ppb-level ammonia is constructed based on a soft-hard interface design of biocompatible seaweed fabric and nanosheet-assembled bismuth oxide architectures after undergoing heat treatment. Benefiting from abundant defective sites and surface chemical state changes, the flexible sensor can work at room temperature and exhibits superior characteristics for ammonia detection, including ultrahigh response (1296), short response/recovery time (12/6 s), small detection limit (117 ppb), and remarkable anti-interference, even after repetitive mechanical bending and long-term fatigue. Furthermore, the flexible sensor demonstrates a noticeable response to the exhaled breath of a patient with Helicobacter pylori infection. After connecting the sensor with a green-light-emitting diode (LED) in the circuit, an alarm system successfully warns about ammonia levels based on the brightness of the LED. This work provides a potential strategy for wide-range ammonia detection and opens new applications in predictive and personalized healthcare platforms for noninvasive medical diagnosis.

Porous Oxide-Functionalized Seaweed Fabric as a Flexible Breath Sensor for Noninvasive Nephropathy Diagnosis.

Bio-based fibers with excellent mechanical and electrochemical properties are crucial to construct high-performance fiber-shaped electrochemical supercapacitors (FESCs) for wearable applications. However, the available biofiber electrodes are suffering greatly from drawback...

Interface engineering of calligraphic ink mediated conformal polymer fibers for advanced flexible supercapacitors

Elastodynamic modeling of spatial parallel manipulators contain subclosed loops

With rapid development of portable and wearable electronics, flexible solid-state supercapacitors (FSS-SCs) is urgently needed while still suffers from serious safety risk and poor electrode-electrolyte interface of regular electrodes. Herein,...

Double-core-shell polysaccharide polymer networks for highly flexible, safe and durable supercapacitors

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Elastodynamic modeling of spatial parallel manipulators contain subclosed loops

Double-core-shell polysaccharide polymer networks for highly flexible, safe and durable supercapacitors