Harsh Environmental-Tolerant and High-Performance Triboelectric Nanogenerator Based on Nanofiber/Microsphere Hybrid Membranes

Abstract

Triboelectric nanogenerator (TENG) can convert tiny mechanical energy into precious electrical energy. Constant improvements to the output performance of TENG is not only the driving force for its sustainable development, but also the key to expand its practical applicability in modern smart devices. However, most previous studies were conducted at room temperature, ignoring the influence of temperature on the output performance of TENG. Additionally, due to thermionic emission effect, the electrons transferred to a dielectric surface can be released into a vacuum after contact electrification. Therefore, TENG cannot maintain an effective electrical output under high-temperature conditions. Here, a series of high-temperature operatable flexible TENGs (HO-TENGs) based on nanofiber/microsphere hybrid membranes (FSHMs) was fabricated by electrospinning and electrospraying. The Voc of HO-TENG is 212 V, which is 2.33 times higher than that of control TENG. After 10,000 cycle stability tests, the HO-TENG shows excellent durability. Especially, this HO-TENG can maintain 77% electrical output at 70 °C compared to room temperature, showing excellent high-temperature operability. This study can not only provide a reference for the construction of advanced high-performance TENG, but also provide a certain experimental basis for efficient collection of mechanical energy in high-temperature environment and promote the application of TENG devices in harsh environments.

Harnessing Ash for Sustainable CO2Absorption: Current Strategies and Future Prospects

“…Several reviews already emphasize this point, such as the summarize of using palm oil fuel ash as the partial replacement of cement by Hamada and the team in 2021, [175] as well as Lignocellulosic Biomass Ash used in cement materials by Sun et al in 2023. [21] Increased Durability and Strength: When ash is used in CO 2 absorption, particularly through processes like mineral carbonation, it undergoes chemical changes that can improve its binding properties. The carbonation reaction often results in the formation of stable mineral carbonates within the ash.…”

“…Ash, a byproduct of burning waste or various industrial and agricultural processes, emerges as a potential material for CO 2 absorption, offering a promising avenue in the quest to mitigate climate change. [16][17][18][19][20][21] As displayed in Figure 2, this material, encompassing fly ash from burning of municipal waste, biomass ash from organic materials, and coal ash from power plants, is abundant and often considered a waste product. Its ubiquitous presence, coupled with the low cost associated with its procurement, positions ash as an economically viable option for large-scale CO 2 capture initiatives.…”

Advances in Triboelectric Nanogenerators for Sustainable and Renewable Energy: Working Mechanism, Tribo-Surface Structure, Energy Storage-Collection System, and Applications

“…TENGs typically consist of two fundamental advanced triboelectric materials, namely a metal and a polymer, with special surface structures introduced on the polymer surface to enhance the TENGs' output performance. These surface structures encompass a variety of designs, including nanostructures [40], pyramid patterns [171], microrod morphologies [172], nanowires [173], textile structures [174], micro rhombic patterns [175], microneedle structures [47], nanowrinkle patterns [176], porous structures [83], and hybrid structures combining nanofibers and microspheres [177]. The applications of these powerful TENGs based on polymer materials and their structures span a wide range, including energy storage, transportation applications, manufacturing, portable devices, sensors, access points, monitoring devices, smart homes, power grids, lighting applications, electric consumption equipment, and human healthcare applications.…”

Smart Triboelectric Nanogenerators Based on Stimulus-Response Materials: From Intelligent Applications to Self-Powered Systems

“…Historically, applications of functional smart materials with controllable shape or volume changes in response to external stimuli have been investigated in several frontier fields, such as sensors, actuators, optoelectronic devices, information storage, and biomedicine [9][10][11][12][13]. These external stimuli include chemical incentives (e.g., changes in concentration, humidity, pH) [14][15][16], mechanical stimuli (e.g., pressure, strain) [17,18], physical stimuli (e.g., light, sound, temperature, color) [19][20][21][22][23], and electromagnetic stimuli (e.g., electric, magnetic, charge injection) [24][25][26][27]. The unique and excellent responsive characteristics of smart materials enable them to be used specifically and accurately in certain applications, allowing them to perceive changes in the environment and adapt future smart polymers to similar situations and specific behaviors in specific applications [28][29][30].…”