KR-20260066890-A - CORE-SHELL SUPRAMOLECULAR HYDROGEL FIBER MOISTURE ELECTRICAL GENERATORS ENABLED BY SYNERGETIC COMPLEX COACERVATION AND BUILT-IN POTENTIAL

KR20260066890AKR 20260066890 AKR20260066890 AKR 20260066890AKR-20260066890-A

Abstract

A moisture power generation element, a method for manufacturing the same, and a generator are disclosed. The moisture power generation element comprises a core including a conductive polymer; and a shell including a composite aggregate including ions, which at least partially surrounds the core, and a potential gradient may occur from a difference in moisture or wettability between the core and the outer shell.

Inventors

박철민
짠광터
이승유
조카이잉
김관호
김호연

Assignees

연세대학교 산학협력단

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (15)

A core comprising a conductive polymer; and A shell comprising a composite aggregate containing ions, at least partially surrounding the core; A potential gradient occurs from a difference in moisture or wettability between the outer periphery of the core and the shell, Moisture generation device.
In paragraph 1, The above conductive polymer comprises PEDOT (poly(3,4-ethylenedioxythiophene)), Moisture generation device.
In paragraph 1, The above composite flocculant comprises poly(diallyldimethylammonium chloride) (PDDA) and sodium alginate (NaAlg). Moisture generation device.
In paragraph 1, The above moisture power generation element further includes an outer electrode formed on the outer surface of the shell, and The above moisture power generation element obtains electrical energy from the potential gradient between the core and the outer electrode, Moisture generation device.
In paragraph 4, The above outer electrode comprises metal, Moisture generation device.
In paragraph 1, The above core and the above shell are formed in a fibrous form, Moisture generation device.
In paragraph 6, The above moisture power generation element further includes an outer electrode formed on the outer surface of the shell, and The outer electrode is formed of a metal wire that spirally wraps the fiber-shaped core and shell, and The above moisture power generation element obtains electrical energy from the potential gradient between the core and the outer electrode, Moisture generation device.
A core-shell forming step comprising at least partially wrapping the outer periphery of a core containing a conductive polymer and forming a shell containing a composite aggregate containing ions; Method for manufacturing a moisture power generation device.
In paragraph 8, The above conductive polymer is prepared by including PEDOT (poly(3,4-ethylenedioxythiophene)). Method for manufacturing a moisture power generation device.
In paragraph 8, The above composite flocculant is prepared by comprising poly(diallyldimethylammonium chloride) (PDDA) and sodium alginate (NaAlg). Method for manufacturing a moisture power generation device.
In paragraph 8, Further comprising an outer electrode forming step of forming an outer electrode on the outer shell, Method for manufacturing a moisture power generation device.
In Paragraph 11, The above outer electrode is prepared by including metal, Method for manufacturing a moisture power generation device.
In paragraph 8, The above core is prepared in the form of fibers, and the above shell is formed in the form of fibers that surround the core. Method for manufacturing a moisture power generation device.
In Paragraph 13, It further includes an outer electrode forming step of forming an outer electrode on the outer shell, and The above outer electrode is formed by wrapping a metal wire spirally around the fiber-shaped core and shell. Method for manufacturing a moisture power generation device.
A moisture power generation element according to paragraph 1 connected to a self-powered sensor or artificial synapse device, Electric generator.

Description

Core-Shell Supramolecular Hydrogel Fiber Moisture Electric Generators Enabled by Synergetic Complex Coaceration and Built-in Potential The present invention relates to a core-shell supramolecular hydrogel fiber moisture-electric generator through interacting complex aggregation and intrinsic potential. Specifically, the present invention relates to a moisture-generating element, a method for manufacturing the same, and a generator. The development of self-powered flexible wearable electronic devices is receiving significant attention for the advancement of human-machine interface technology. Accordingly, various sophisticated electric generators capable of harvesting ambient energy have been devised, such as triboelectric/piezoelectric nanogenerators, thermoelectric generators, solar cells, and moisture-driven electric generators (MEGs). Among these, MEGs operate based on widely available moisture, and therefore have the potential to be suitable for self-powered electronic devices if they meet high harvesting performance, excellent mechanical elasticity, breathability, and biocompatibility similar to other alternatives. Although high-performance MEGs have been extensively studied by exploring new materials with optimized device structures, such as graphene oxide, carbon dots, hydrogels, proteins, aerogels, and polymer electrolytes, their energy harvesting performance remains insufficient, necessitating the development of new material strategies to enhance performance. In prior art, it was revealed that the relatively low current density generated in MEGs is caused by the limited number of mobile ions preferentially dissociated from the energy-generating material, resulting in low power density due to their long transport paths and slow diffusion rates. To address this fundamental problem of MEGs, the inventors hypothesized that composite aggregation involving phase separation of two oppositely charged polymer electrolytes—one of the most effective microencapsulation technologies widely used in the pharmaceutical, food, agriculture, and textile industries—would be promising. This is because a large number of additional mobile ions are easily generated during the composite aggregation process. Furthermore, phase separation associated with dense aggregation increases the free volume within the system, enabling rapid ion diffusion. To further promote ion diffusion, a fiber-based MEG with a core-shell structure featuring a mechanically flexible electrode core and an aggregation shell is proposed, which provides durability against various mechanical deformations such as bending, folding, rolling, and twisting. The present invention presents a composite aggregation and embedded potential strategy for developing a high-performance core-shell fiber-based MEG with mechanical flexibility. The core-shell fiber-type MEG consists of a poly(3,4-ethylenedioxythiophene) (PEDOT) core and a shell composed of a composite aggregate of poly(diallyldimethylammonium chloride) (PDDA) and sodium alginate (NaAlg), which is wrapped by a copper thread-based external electrode (Fig. 1a). During the entropy-driven composite aggregation of PDDA and NaAlg, which have opposite charges, within the fiber shell, a large amount of mobile counterions are additionally released, and due to the newly created free volume, the mobile ions diffuse rapidly and easily into the copper electrode. Furthermore, the PEDOT core, having a negative surface potential (embedded potential), promotes charge separation and enables ion diffusion in the electric field direction, thereby providing a high-performance fiber-based MEG with excellent flexibility. Self-powered information transmission was achieved based on the MEG interacting with finger movements. Furthermore, a long-acting artificial synaptic memristor mimicking autonomous human synapses was constructed by connecting a fiber-based MEG to a synapse. Fig. 1 Design and characteristics of fiber-based MEG. a, Schematic diagram of the synergistic strategy of composite cohesion and embedded potential. b, Output voltage, c, Current density, d, Voltage and current density as a function of electrical resistance, e, Correspondence graph of power density of fiber-based MEG at 20% relative humidity. f, Performance of fiber-based MEG and performance of previously reported MEG. g, Comparative radar chart of representative MEGs. Fig. 2 Preparation and structure of PEDOT@PDDA/NaAlg core-shell fibers. a, Schematic of the preparation process. b, SEM image of the PEDOT ribbon. c, Wrinkle, d, Twist, e, Hydrophilicity, f, Repeated folding of the PEDOT ribbon. g,h, Cross-section of the PEDOT@ P5N20 core-shell fiber and corresponding EDS map. i, FT-IR spectrum, j, High-resolution C1s, k, High-resolution N1s XPS profile (PEDOT core-based fiber and PDDA film). Fig. 3 Condition experiments for performance enhancement of fibrous MEG. a, Characteristics of fibrous MEG with different PDDA/NaAlg ratios at 20% relative humidity, b, PEDO