1
|
Guo S, Zhang Y, Yu Z, Dai M, Liu X, Wang H, Liu S, Koh JJ, Sun W, Feng Y, Chen Y, Yang L, Sun P, Lu G, Yu C, Chen W, De Wolf S, Wang Z, Tan SC. Leaf-based energy harvesting and storage utilizing hygroscopic iron hydrogel for continuous power generation. Nat Commun 2025; 16:5267. [PMID: 40480977 PMCID: PMC12144242 DOI: 10.1038/s41467-025-60341-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2025] [Accepted: 05/19/2025] [Indexed: 06/11/2025] Open
Abstract
In the era of big data, developing next-generation self-powered continuous energy harvesting systems is of great importance. Taking advantage of fallen leaves' specific structural advantage gifted by nature, we propose a facile approach to convert fallen leaves into energy harvesters from ubiquitous moisture, based on surface treatments and asymmetric coating of hygroscopic iron hydrogels. Upon moisture absorption, a water gradient is established between areas with/without hydrogel coating, and maintained due to gel-like behaviors and leaf veins for water retention and diffusion restriction, thus forming electrical double layers over the leaf surface and showing capacitance-like behavior for energy charging and discharging. Besides, the specific leaf cell structures with small grooves enabled uniform carbon coatings instead of aggregations, and high electrical conductivity, resulting in 49 μA/cm2 and 497 μW/cm3 electrical output, achieving competitive performance with the state-of-art and potential for lower environmental impact compared to other types of energy harvesters.
Collapse
Affiliation(s)
- Shuai Guo
- Department of Materials Science and Engineering, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Yaoxin Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, 201306, P.R. China
| | - Zhen Yu
- Department of Materials Science and Engineering, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Ming Dai
- Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, P.R. China
| | - Xuanchen Liu
- Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, P.R. China
| | - Hongbo Wang
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R. China
| | - Siqi Liu
- Department of Materials Science and Engineering, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - J Justin Koh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Singapore
| | - Wanxin Sun
- Division of Nano Surfaces, Bruker Corporation, 11 Biopolis Way, Singapore, 138667, Singapore
| | - Yuanping Feng
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
| | - Yuanzheng Chen
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Southwest Jiaotong University, Chengdu, 610031, P.R. China
| | - Lin Yang
- Key Laboratory of Optoelectronic Technology and System of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Peng Sun
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China
| | - Geyu Lu
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China
| | - Cunjiang Yu
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Materials Science and Engineering, University of Illinois, Urbana-Champaign, Urbana, IL, USA
- Department of Mechanical Science and Engineering, University of Illinois, Urbana-Champaign, Urbana, IL, USA
- Department of Bioengineering, Materials Research Laboratory, Beckman Institute for Advanced Science and Technology, Nick Holonyak Micro and Nanotechnology Laboratory, University of Illinois, Urbana-Champaign, Urbana, IL, USA
| | - Wenshuai Chen
- Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, P.R. China.
| | - Stefaan De Wolf
- Physical and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - Zuankai Wang
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R. China.
| | - Swee Ching Tan
- Department of Materials Science and Engineering, 9 Engineering Drive 1, Singapore, 117575, Singapore.
| |
Collapse
|
2
|
You S, Chen M, Ren H, Zhu L, Wang P, Sheng W, Li W. A Robust Lignin-Derived Moisture-Enabled Electric Generator with Sustained and Scalable Power Output. ACS APPLIED MATERIALS & INTERFACES 2025; 17:12034-12042. [PMID: 39961725 DOI: 10.1021/acsami.4c19152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2025]
Abstract
Leveraging ubiquitous moisture and abundant biomass in nature to convert chemical energy into electrical energy holds great promise for meeting energy demands. Herein, we report a simple, green, low-cost, and high-performance lignin-derived moisture-enabled electric generator (LMEG). An LMEG device with an area of 0.25 cm2 can give a stable open-circuit voltage of 1.26 V, a high short-circuit current density of 439.36 μA cm-2, and a maximum power density of up to 32.73 μW cm-2. Moreover, the LMEG exhibits continuous electrical output for at least 2 months, demonstrates high tolerance to a wide range of working environments and mechanical deformations, and is recyclable. Besides, a near-linear increase in electric production can be achieved by integrating LMEG devices in series or parallel, significantly with a current of 1.45 mA obtained by connecting only 18 LMEG units in parallel. The integrated LMEG can successfully drive various electronic products, including LED arrays, electronic watches, and hygrometers, highlighting its potential in self-powered systems and sensing applications.
Collapse
Affiliation(s)
- Shuai You
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Menglu Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Haohao Ren
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Longzhu Zhu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Peize Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Wenbo Sheng
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Wei Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| |
Collapse
|
3
|
Gao Y, Elhadad A, Choi S. A Paper-Based Wearable Moist-Electric Generator for Sustained High-Efficiency Power Output and Enhanced Moisture Capture. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2408182. [PMID: 39308200 PMCID: PMC11636170 DOI: 10.1002/smll.202408182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2024] [Indexed: 12/13/2024]
Abstract
Disposable wearable electronics are valuable for diagnostic and healthcare purposes, reducing maintenance needs and enabling broad accessibility. However, integrating a reliable power supply is crucial for their advancement, but conventional power sources present significant challenges. To address that issue, a novel paper-based moist-electric generator is developed that harnesses ambient moisture for power generation. The device features gradients for functional groups and moisture adsorption and architecture of nanostructures within a disposable paper substrate. The nanoporous, gradient-formed spore-based biofilm and asymmetric electrode deposition enable sustained high-efficiency power output. A Janus hydrophobic-hydrophilic paper layer enhances moisture harvesting, ensuring effective operation even in low-humidity environments. This research reveals that the water adsorption gradient is crucial for performance under high humidity, whereas the functional group gradient is dominant under low humidity. The device delivers consistent performance across diverse conditions and flexibly conforms to various surfaces, making it ideal for wearable applications. Its eco-friendly, cost-effective, and disposable nature makes it a viable solution for widespread use with minimal environmental effects. This innovative approach overcomes the limitations of traditional power sources for wearable electronics, offering a sustainable solution for future disposable wearables. It significantly enhances personalized medicine through improved health monitoring and diagnostics.
Collapse
Affiliation(s)
- Yang Gao
- Bioelectronics & Microsystems LaboratoryDepartment of Electrical & Computer EngineeringState University of New York at BinghamtonBinghamtonNew York13902USA
| | - Anwar Elhadad
- Bioelectronics & Microsystems LaboratoryDepartment of Electrical & Computer EngineeringState University of New York at BinghamtonBinghamtonNew York13902USA
| | - Seokheun Choi
- Bioelectronics & Microsystems LaboratoryDepartment of Electrical & Computer EngineeringState University of New York at BinghamtonBinghamtonNew York13902USA
- Center for Research in Advanced Sensing Technologies & Environmental SustainabilityState University of New York at BinghamtonBinghamtonNew York13902USA
| |
Collapse
|
4
|
Li X, Lv D, Ai L, Wang X, Xu X, Qiang M, Huang G, Yao X. Superstrong Ionogel Enabled by Coacervation-Induced Nanofibril Assembly for Sustainable Moisture Energy Harvesting. ACS NANO 2024; 18:12970-12980. [PMID: 38725336 DOI: 10.1021/acsnano.4c01179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Ionogels have grabbed significant interest in various applications, from sensors and actuators to wearable electronics and energy storage devices. However, current ionogels suffer from low strength and poor ionic conductivity, limiting their performance in practical applications. Here, inspired by the mechanical reinforcement of natural biomacromolecules through noncovalent aggregates, a strategy is proposed to construct nanofibril-based ionogels through complex coacervation-induced assembly. Cellulose nanofibrils (CNFs) can bundle together with poly(ionic liquid) (PIL) to form a superstrong nanofibrous network, in which the ionic liquid (IL) can be retained to form ionogels with high liquid inclusion and ionic conductivity. The strength of the CNF-PIL-IL ionogels can be tuned by the IL content over a wide range of up to 78 MPa. The optical transparency, high strength, and hygroscopicity enabled them to be promising candidates in moist-electricity generation and applications such as energy harvesting windows and wearable power generators. In addition, the ionogels are degradable and the ionogel-based generators can be recycled through dehydration. Our strategy suggests perspectives for the fabrication of high-strength and multifunctional ionogels for sustainable applications.
Collapse
Affiliation(s)
- Xin Li
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
| | - Dong Lv
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
| | - Liqing Ai
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
| | - Xuejiao Wang
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
| | - Xiubin Xu
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Mengyi Qiang
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
| | - Gongsheng Huang
- Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
| | - Xi Yao
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
- Shenzhen Research Institute of City University of Hong Kong, Shenzhen 518057, P. R. China
| |
Collapse
|
5
|
Fu C, Zhou J, Lu X, Feng H, Zhang Y, Shang K, Jiang Z, Yao Y, He Q, Yang T. A Long Life Moisture-Enabled Electric Generator Based on Ionic Diode Rectification and Electrode Chemistry Regulation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305530. [PMID: 38353337 PMCID: PMC11022712 DOI: 10.1002/advs.202305530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 01/17/2024] [Indexed: 04/18/2024]
Abstract
Considerable efforts have recently been made to augment the power density of moisture-enabled electric generators. However, due to the unsustainable ion/water molecule concentration gradients, the ion-directed transport gradually diminishes, which largely affects the operating lifetime and energy efficiency of generators. This work introduces an electrode chemistry regulation strategy into the ionic diode-type energy conversion structure, which demonstrates 1240 h power generation in ambient humidity. The electrode chemical regulation can be achieved by adding Cl-. The purpose is to destroy the passivation film on the electrode interface and provide a continuous path for ion-electron coupling conduction. Moreover, this device simultaneously satisfies the requirements of fast trapping of moisture molecules, high rectification ratio transport of ions, and sustained ion-to-electron current conversion. A single device can deliver an open-circuit voltage of about 1 V and a peak short-circuit current density of 350 µA cm-2. Finally, the first-principle calculations are carried out to reveal the mechanism by which the electrode surface chemistry affects the power generation performance.
Collapse
Affiliation(s)
- Chunqiao Fu
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Jian Zhou
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Xulei Lu
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Haochen Feng
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Yong Zhang
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Kedong Shang
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Zhongbao Jiang
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Yuming Yao
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| | - Qi‐Chang He
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
- Univ Gustave EiffelMSMECNRS UMR 8208Marne‐la‐ValléeF‐77454France
| | - Tingting Yang
- Tribology Research InstituteSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031P. R. China
| |
Collapse
|
6
|
Galembeck F, Santos LP, Burgo TAL, Galembeck A. The emerging chemistry of self-electrified water interfaces. Chem Soc Rev 2024; 53:2578-2602. [PMID: 38305696 DOI: 10.1039/d3cs00763d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Water is known for dissipating electrostatic charges, but it is also a universal agent of matter electrification, creating charged domains in any material contacting or containing it. This new role of water was discovered during the current century. It is proven in a fast-growing number of publications reporting direct experimental measurements of excess charge and electric potential. It is indirectly verified by its success in explaining surprising phenomena in chemical synthesis, electric power generation, metastability, and phase transition kinetics. Additionally, electrification by water is opening the way for developing green technologies that are fully compatible with the environment and have great potential to contribute to sustainability. Electrification by water shows that polyphasic matter is a charge mosaic, converging with the Maxwell-Wagner-Sillars effect, which was discovered one century ago but is still often ignored. Electrified sites in a real system are niches showing various local electrochemical potentials for the charged species. Thus, the electrified mosaics display variable chemical reactivity and mass transfer patterns. Water contributes to interfacial electrification from its singular structural, electric, mixing, adsorption, and absorption properties. A long list of previously unexpected consequences of interfacial electrification includes: "on-water" reactions of chemicals dispersed in water that defy current chemical wisdom; reactions in electrified water microdroplets that do not occur in bulk water, transforming the droplets in microreactors; and lowered surface tension of water, modifying wetting, spreading, adhesion, cohesion, and other properties of matter. Asymmetric capacitors charged by moisture and water are now promising alternative equipment for simultaneously producing electric power and green hydrogen, requiring only ambient thermal energy. Changing surface tension by interfacial electrification also modifies phase-change kinetics, eliminating metastability that is the root of catastrophic electric discharges and destructive explosions. It also changes crystal habits, producing needles and dendrites that shorten battery life. These recent findings derive from a single factor, water's ability to electrify matter, touching on the most relevant aspects of chemistry. They create tremendous scientific opportunities to understand the matter better, and a new chemistry based on electrified interfaces is now emerging.
Collapse
Affiliation(s)
- Fernando Galembeck
- Department of Physical Chemistry, University of Campinas, Institute of Chemistry, 13083-872, Campinas, Brazil.
- Galembetech Consultores e Tecnologia, 13080-661, Campinas, Brazil
| | - Leandra P Santos
- Galembetech Consultores e Tecnologia, 13080-661, Campinas, Brazil
| | - Thiago A L Burgo
- Department of Chemistry and Environmental Sciences, São Paulo State University (Unesp), 15054-000, São José do Rio Preto, Brazil
| | - Andre Galembeck
- Department of Fundamental Chemistry, Federal University of Pernambuco, 50740-560, Recife, Brazil
| |
Collapse
|