Flexible Piezoelectric Nanogenerator as a Self-charging Piezo-supercapacitor for Energy Havesting and Storage Application

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110752 - 110752

Published: Feb. 1, 2025

Language: Английский

---

Wearable Self‐Powered Pressure Sensors Based on alk‐Ti₃C₂T_x Regulating Contact Barrier Difference for Noncontact Motion Object Recognition

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Wearable self-powered pressure sensors present tremendous potential for object recognition. However, the fluctuated approach speed and distance may compromise device output, thus affecting recognition accuracy. Herein, a wearable sensor with high sensitivity (1.48 V kPa-1), output (130.5V), permeability (259.98 mm s-1) are developed where contact barrier difference triboelectric charge density of layer surface dynamically regulated by modulating groups resulting in lower dielectric loss higher output. The leverages polarity between target sensitive material to generate electrical signals at different speeds distances through an electrostatic induction mechanism. With assistance Transformer model self-attention mechanism, average accuracy 94.3% is achieved acquiring sensing distances. Simulating ability human vision, enables visually impaired people acclimate their surroundings more easily independently provides critical advancement blind daily life.

Language: Английский

---

Self-Powered advanced oxidation processes for removing contaminants from wastewater

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161443 - 161443

Published: March 1, 2025

Language: Английский

---

Improved Foaming Performance of Thermoplastic Polyether Amide Elastomers via Chain Extension: Toward Self‐Powered Intelligent Footwear

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

Thermoplastic polyamide elastomers (TPAEs) with 6 (PA6) as hard segments and polyether amine soft are successfully synthesized by one‐pot melt polycondensation, in which the tensile strength elongation‐at‐break of resulting TPAE segment content 43 wt% reached (27.54 ± 0.92) MPa (508.10 19.81)%, respectively. Subsequently, two different types chain extenders Joncryl ADR 4468 ((ADR)/Hexamethylene Diisocyanate (HDI) trimer) applied to enhance molecular entanglement TPAEs. It is found that showed a better extension effect, TPAEs improved significantly when 5 wt%, corresponding foam possessed outstanding compressive resilience stability. Based on excellent compression property, contact‐separated triboelectric nanogenerator assembled friction layer, demonstrated high open‐circuit voltage 20.4 V, short‐circuit current 0.74 μA, power density 0.18 W m −2 , durability. Overall, prepared foams provided an avenue for high‐performance self‐powered intelligent footwear materials.

Language: Английский

---

Sustainable Nonwoven Triboelectric Nanogenerator Including Pseudo‐Thickness Enabled Consistent Power Generation in Ultralow Contact Frequency

Small Structures, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

A poly(ethylene terephthalate) (PET) nonwoven‐fabric‐based triboelectric nanogenerator (NWF‐TENG) with high energy‐harvesting efficiency at ultralow contact frequencies is introduced, enabled by the concept of pseudo‐thickness. PET‐based NWF exhibits consistent mechanical properties regardless its origin, even including recycled PET sources, providing sustainable benefits NWF‐TENG system. Above all, this study first demonstration to analyze impact thickness changes in compressible dielectric materials within dielectric‐to‐dielectric TENG models. Through RC decay analysis, it revealed that peak‐to‐peak voltage NWF‐PET 2,653 V, significantly higher than conventional noncompressible film‐based (F‐TENG). After combining a power management system, achieves continuous direct current output 24.8 mW m −2 , indicating potential for powering electronic devices. Lastly, outstanding charge preservation capability due sustained state during compression cycles material. In an application test, stopwatch continuously powered 0.0025 2 operating frequency 0.2 Hz. work, valuable insights are provided into design and optimization energy harvesting systems using compressing valid pseudo‐thickness concept.

Language: Английский

---

Breaking the Charge Limitation Constrained by Triboelectrification through the Charge Multiplication Effect

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Enhancing the output performance of triboelectric nanogenerator (TENG), as determined by its quadratic charge density, is crucial for commercialization. While latest bi‐characteristic current TENG (BC‐TENG) holds promise in overcoming limitations conventional alternating‐current and direct‐current TENGs, fundamental working mechanism source remain unclear. Here, a comprehensive investigation conducted into physical process behind complicated electrostatic discharges during BC‐TENG operation, universal multiplication effect (CME) reported. Based on gas discharge physics, underlying CME established validated it across micro‐ macro‐perspectives. This enables BC‐TENGs to generate charges exceeding initial tribo‐charge over threefold, effectively surpassing triboelectrification limit air. Further analysis identifies tribolayer–tribolayer dominant source, with additional contributions from tribolayer‐electrode residual surface induction. By constructing rotary‐mode BC‐TENG, an ultrahigh density 16.34 mC m −2 average power 61.87 W Hz −1 obtained, outperforming previous reports. work redefines strategies high‐performance design, marking significant breakthrough field.

Language: Английский

---

Hybrid Triboelectric‐Electromagnetic‐Electric Field Energy Harvester for Simultaneous Wind and Electric Field Energy Capture in High‐Voltage Transmission System

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 26, 2024

Abstract With the development of smart grids, efficient condition monitoring high voltage transmission system has become crucial, necessitating reliable power supplies for distributed sensors. Traditional energy harvesters often focus on either internal or external sources, limiting overall efficiency. This study introduces a triboelectric‐electromagnetic‐electric field hybrid harvester (TEE‐HEH) that synergistically integrates triboelectric nanogenerators (TENGs), electromagnetic generators (EMGs), and electric (EEHs) to simultaneously capture wind energy. Electric is harvested via displacement currents between lines ground, while TENGs EMGs efficiently low‐ high‐speed energy, respectively, enabling broadband harvesting (2.3–10 m s −1 ). The synergistic combination TENG, EMG, EEH within TEE‐HEH leads significantly enhanced efficiency from multiple sources. At speed 5 , line 25 kV, distance 1.5 m, achieved peak outputs 18.5 mW (TENG), 262 (EMG), 1.85 (EEH), demonstrating collection An environmental been powered, TEE‐HEH's practicality dual‐source in grid applications.

Language: Английский

---

Significantly Enhanced Output Performance of Triboelectric Nanogenerators via Charge Storage and Release Strategy

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract As a novel energy harvesting technology, bettering the output performance of triboelectric nanogenerators (TENGs) is vital. Although quite number methods to increase charge density have been proposed, challenges such as high impedance matching and low current persist, severely limit utilization efficiency TENGs. Here, new power management circuit (PMC) proposed that through storage release strategy. This first excites surface TENG using excitation circuit, then releases stored self‐triggered switch. Compared standard TENG, with this PMC increased by factor 1108, decreased from 100 MΩ 10 kΩ, markedly improved. work affords reference for enhancing reducing impedance, broading utility attainable

Language: Английский

---

High triboelectrification and charge collection efficiency of direct current triboelectric nanogenerator achieved by tri-synergistic enhancement strategy

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This work proposes a ternary dual-DC triboelectric nanogenerator (TDD-TENG) with triple synergy enhancement strategy to improve the charge collection ability and triboelectrification efficiency.

Language: Английский

---