Progress in Materials Science, Journal Year: 2024, Volume and Issue: unknown, P. 101420 - 101420
Published: Dec. 1, 2024
Language: Английский
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 29, 2024
Abstract Triboelectric nanogenerators (TENGs) represent an effective approach for transforming mechanical energy into electrical power, making them suitable wearable electronic applications. Hydrogels as TENGs electrodes are common, but their use direct triboelectric layers remains insufficiently explored. Here, a novel zwitterionic monomer 3‐{1‐[6‐(hydroxymethyl)‐2‐methyl‐3,8‐dioxo‐9‐aza‐4,7‐dioxadodec‐1‐en‐12‐yl]imidazol‐3‐ium‐3‐yl}propane‐1‐sulfonate (VNIPS) is synthesized in combination with acrylic acid (AA) and sulfobetaine methacrylate (SBMA) to create double‐network hydrogel. The hydrogel developed using solvent‐exchange process that facilitated the creation of microphase‐separated domains, notablely increasing its strength (211.9 kPa, 472.3%), conductivity (0.6 mS cm −1 ), anti‐freezing capability (−18.3 °C). In addition, hydrogel's hydrophilic groups interacted water molecules, reducing charge loss humid conditions. When employed positive layer, hydrogel‐based achieved substantial density 456 µC m − 2 output power 464 mW , while maintaining steady open‐circuit voltage (V oc ) 97 V, 92% retention under 80% relative humidity. Moreover, strong adhesion biocompatibility make it applications, such motion sensing Morse code communication. This work demonstrates feasibility hydrogels materials, providing new strategy creating efficient, humidity‐resistant harvesters.
Language: Английский
Citations
7
Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 2, 2025
Polymer gel-based ionic thermoelectric (i-TE) devices, including thermally chargeable capacitors and thermogalvanic cells, represent an innovative approach to sustainable energy harvesting by converting waste heat into electricity. This review provides a comprehensive overview of recent advancements in i-TE materials, focusing on their Seebeck coefficients, the mechanisms underlying thermodiffusion effects, various strategies employed enhance performance. Gel-based materials show great promise due flexibility, low cost, suitability for flexible wearable devices. However, challenges such as improving conductivity stability redox couples remain. Future directions include enhancing efficiency ionic-electronic coupling developing more robust electrode optimize conversion real-world applications.
Language: Английский
Citations
0
ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown
Published: March 4, 2025
This work addresses the dual challenges of seawater purification and converting low-grade waste heat into electricity, both which are crucial for sustainable resource management. It presents a combined approach that solves problems using self-fabricated device. The device generates temperature gradient through efficient photothermal conversion by placing thermoelectric hydrogels on top hydrogel. Poly(vinyl alcohol) (PVA) is used as matrix hydrogel was selected its biocompatibility ease processing. In order to enhance solar-driven water evaporation efficiency, ball-milled dititanium trioxide (Ti2O3) nanoparticles carbon nanotubes (CNTs) incorporated within PVA matrix. enables rate high 3.22 kg m–2 h–1. Additionally, also serves gels, soaked with K3[Fe(CN)6]/K4[Fe(CN)6] redox pair solution exploit thermogalvanic acid (TGC) effect. arrangement voltage generation reactions at hot cold ends. obtained excellent properties can be characterized ionic Seebeck coefficient (Si) 1.48 mV K–1 power density 9.6 mW after nine were connected in series. As result, this dual-functional simultaneously effectively purifies electricity. Outdoor testing shows daily production 9.2 stable 130 from hydrogels. advances energy technologies opens new avenues innovative applications renewable energy.
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
Despite the rapid development of single-modal flexible sensors, there is an urgent need to develop self-powered multimodal sensing devices eliminate power constraints. This work reports stretchable thermoelectric composites based on porous laser-induced graphene foams and ion hydrogel, aiming create a sensor that can detect temperature changes strain with high accuracy. The 3D (LIG) foam exhibits maximum sensitivity 105.9 for up 30%, low detection limit 0.071%, good stability over 5,000 cycles at 30% strain. With increased Seebeck coefficient −189.90 μV/K, also temperatures in range −10–100 °C resolution 0.1 °C. generation array integrated units achieve output voltage 104.18 mV difference 20 By combining electronic material LIG ionic NKKC/PFF, dual-parameter sensors demonstrate potential human health monitoring, smart storage, bathroom systems. reported be further utilized temperature-strain decoupled battery garments, medical applications.
Language: Английский
Citations
0
ACS Nano, Journal Year: 2025, Volume and Issue: unknown
Published: April 16, 2025
Electrical stimulation (ES) serves as a biological cue that regulates critical cellular processes, including proliferation and migration, offering an effective approach to accelerating wound healing. Thermoelectrics, capable of generating electricity by exploiting the temperature difference between skin surrounding environment without external energy input, present promising avenue for ES-based therapies. Herein, we developed Ag2Se@gelatin methacrylate (Ag2Se@GelMA) thermoelectric hydrogels with high room-temperature performance employed them self-powered ES devices repair. Systematic in vivo vitro investigations elucidated their mechanisms enhancing Our findings reveal Ag2Se@GelMA can significantly accelerate closure amplifying endogenous electric field, thereby promoting cell proliferation, angiogenesis. Comprehensive experiments demonstrated generated activates voltage-gated calcium ion channels, elevating intracellular Ca2+ levels mitochondrial functions through Ca2+/CaMKKβ/AMPK/Nrf2 pathway. This cascade improves dynamics angiogenesis, tissue regeneration. The newly represent marked progress dressing technology potential improve clinical strategies engineering regenerative medicine.
Language: Английский
Citations
0
The Journal of Chemical Physics, Journal Year: 2025, Volume and Issue: 162(16)
Published: April 23, 2025
With the increasing demand for flexible microwave-absorbing materials (MAMs), it is necessary to ensure a continuous network of MAM fillers. However, still great challenge achieve uniform loading magnetic nanoparticles because uncertain reaction sites graphene. For this research, we adopted high-pressure homogenization strategy realize distribution Co on graphene surface via polyethyleneimine (PEI) modification. Transferring from randomly distributed oxygen functional groups uniformly PEI molecules, homogeneous oxide (GO)/PEI/Co (GP/Co) dispersion ensured form reduced (RGO)/PEI/Co (RGP/Co) after reduction. RGP/Co-2 achieved an effective absorption −51.9 dB in C band and microwave bandwidth 5.84 GHz. In addition, was filled into polyacrylamide/polyvinyl alcohol (PAM/PVA) hydrogel construct structure, RGP/Co-2/PAM/PVA MAMs were prepared. The minimum reflection loss (RLmin) −41.5 under thickness 2.5 mm shows excellent mechanical flexibility. exhibited sensing performance. This research supplied new perspective development electronics.
Language: Английский
Citations
0
Small, Journal Year: 2025, Volume and Issue: unknown
Published: April 27, 2025
Abstract Low‐grade heat accounts for a significant portion of the heat, but is often overlooked and not utilized. Ionic thermoelectric generators (i‐TEGs) are an ideal choice harvesting low‐grade due to their simple design operation. However, challenges such as ion mobility regulation need series integration still hinder performance. In this work, interesting approach introduced improve efficiency i‐TEG by utilizing ion‐selective hydrogels containing sodium chloride (NaCl). The anionic polymer in cation‐selective hydrogel attractive ions, while cationic anion‐selective ions. This regulates thermal ions without modification or addition some additives, thus enhancing changing Seebeck coefficient ( S ). By connecting 12 pairs P‐type N‐type i‐TEGs, voltage 1.54 V output power 21 µW can be achieved on surface body skin. work opens new horizon obtaining high‐performance i‐TEGs through hydrogels, highlights prospect P‐N integrated from harvesting.
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 22, 2024
Thermoelectricity offers a promising solution for reducing carbon emissions by efficiently converting waste heat into electrical energy. However, high-performance thermoelectric materials predominantly consist of rare, toxic, and costly inorganic compounds. Therefore, the development alternating material systems is crucial broader applications. A significant challenge in this field strong interdependence various parameters, which complicates their simultaneous optimization. Consequently, methods decoupling these parameters are required. In respect, composite technology has emerged as an effective strategy that leverages advantages diverse components to enhance overall performance. After elaborating on fundamental concepts thermoelectricity challenges enhancing performance, present review provides comparative analysis organic explores parameters. addition, benefits emphasized range low thermal conductivity with microporous macroporous structures introduced, highlighting potential Furthermore, current obstacles discussed, several cutting-edge studies highlighted, focus role high fillers performance mechanical properties. Finally, combining can achieve superior These insights intended guide future research porous nanohybrids order promote more sustainable efficient energy solutions.
Language: Английский
Citations
3
Progress in Materials Science, Journal Year: 2024, Volume and Issue: unknown, P. 101420 - 101420
Published: Dec. 1, 2024
Language: Английский
Citations
2