Article
Chemistry, Multidisciplinary
Huaifang Qin, Liang Xu, Shiquan Lin, Fei Zhan, Kai Dong, Kai Han, Huamei Wang, Yawei Feng, Zhong Lin Wang
Summary: Triboelectric nanogenerators are a new technology for energy harvesting and distributed power supply. This study demonstrates a new mechanism for energy harvesting by introducing an oil phase into a water-solid interface. Charge transfer is observed through squeezing and releasing oil droplets on a dielectric surface in a water environment.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Wenxuan Zhu, Chaosheng Hu, Maoyi Zhang, Tao Jiang, Chris R. R. Bowen, Xiaojing Mu, Ya Yang
Summary: The demand for micro-energy sources has increased due to the widespread use of small-scale and low-power electronic devices. This paper presents a novel coupled nanogenerator that can harvest multiple energy sources simultaneously. By utilizing the unique electrical properties of ferroelectric material Bi0.5Na0.5TiO3 (BNT), a single element combining photovoltaic, pyroelectric, and triboelectric-piezoelectric nanogenerators can harvest light, heat, and mechanical energy. The evaluation of the coupling effectiveness of different materials shows that BNT has the best coupling enhancement compared to common ferroelectric materials, indicating its potential for future development of coupled nanogenerators capable of harvesting multiple sources of energy.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Green & Sustainable Science & Technology
Qazi Muhammad Saqib, Muhammad Umair Khan, Hyunjae Song, Mahesh Y. Chougale, Rayyan Ali Shaukat, Jungmin Kim, Jinho Bae, Min Joo Choi, Seong Chan Kim, Ohbin Kwon, Amine Bermak
Summary: By utilizing tomato peel to fabricate a nature-driven hybrid nanogenerator, this study demonstrates enhanced output performance, offering a new pathway towards bio-based nanogeneration and self-powered sensing green technologies.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Chemistry, Physical
Xi Liang, Shijie Liu, Shiquan Lin, Hongbo Yang, Tao Jiang, Zhong Lin Wang
Summary: In the new energy era, ocean wave energy is recognized as an important clean and renewable energy source. Developing triboelectric nanogenerators (TENGs) to harvest ocean wave energy has become a promising research direction. This study proposes a new working scheme of TENGs for water wave energy harvesting, achieving efficient conversion of water kinetic energy into electrical energy. The TENG structure is extended to an array, exhibiting desired output performance under irregular water waves. The study demonstrates the successful powering of signal spotlights, digital thermometers, and water quality detectors, broadening research ideas for TENGs and providing a new mechanism for ocean wave energy exploitation.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Xuemei Wang, Wangshu Tong, Yanan Li, Zhihao Wang, Yiyuan Chen, Xiao Zhang, Xin Wang, Yihe Zhang
Summary: This study investigated the triboelectric performance of mica, a promising positive friction layer candidate for environmentally friendly TENGs, and explored the factors affecting its performance. The mica-based TENG showed excellent positive triboelectric property and achieved a high maximum output power density, demonstrating its potential in harvesting mechanical energy for various applications.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Weradesh Sangkhun, Sompit Wanwong
Summary: This study presents a facile method to create efficient natural textile based triboelectric nanogenerators (N-TENGs) by transforming the surface energy of cotton and silk into positive and negative triboelectricity. The fabricated N-TENGs demonstrated high output voltage and current, as well as self-powering applications, showing great potential for energy harvesting and wearable electronics.
Article
Chemistry, Physical
Seneke Chamith Chandrarathna, Sontyana Adonyah Graham, Muhammad Ali, Jae Su Yu, Jong-Wook Lee
Summary: The study proposes an efficient power management system for TENGs using a dynamically reconfigured combining method and dual-parameter maximum power point tracking (MPPT). This method can effectively improve the power extraction efficiency of TENGs, making them suitable for practical applications.
ADVANCED ENERGY MATERIALS
(2022)
Review
Chemistry, Physical
Tao Li, Pooi See Lee
Summary: This paper reviews the key parameters of piezoelectric energy harvesting and provides a guideline for future development. Based on a universal theoretical model, the parameters are divided into six groups for discussion. The paper also introduces the characteristics of piezoelectric materials, structure designs, sources of excitation and vibration, effects of frequency and speed, the impact of electrical load on output power, and parameters of energy accumulation effect and methods. Examples of potential applications and future challenges are discussed.
Review
Chemistry, Physical
Yi Li, Song Xiao, Yi Luo, Shuangshuang Tian, Ju Tang, Xiaoxing Zhang, Jiaqing Xiong
Summary: Electrospun nanofiber is highly beneficial in various applications, specifically in distributed energy management, wearables, and bio-interface electronics. This article provides a comprehensive review of the latest progress in electrospun nanofiber-based triboelectric active layers and functional conductors, highlighting their advantages and potential challenges.
Article
Materials Science, Multidisciplinary
Rajib Mondal, Md Al Mahadi Hasan, Jeong Min Baik, Ya Yang
Summary: Heat energy, which is available in large quantities and often wasted, can be harnessed and converted into electrical energy for use in ultra-low power devices. Pyroelectric energy harvesting technology has gained significant attention in power generation and sensing systems due to its ability to scavenge thermal energy. Various pyroelectric and piezoelectric materials have been explored for their potential in energy harvesting and sensing applications. This review provides a comprehensive summary of the significance and physical applications of pyroelectric materials, including single crystal, inorganic films, ceramics, organic materials, polymers, and composites, for thermal energy harvesting in sensor devices. The potential for next-generation self-powered sensor technologies is also discussed.
Review
Chemistry, Multidisciplinary
Enrique Delgado-Alvarado, Ernesto A. Elvira-Hernandez, Jose Hernandez-Hernandez, Jesus Huerta-Chua, Hector Vazquez-Leal, Jaime Martinez-Castillo, Pedro J. Garcia-Ramirez, Agustin L. Herrera-May
Summary: Green energy from natural sources such as sunshine, water, biomass, geothermal heat, and wind is environmentally friendly and avoids the use of fossil fuels. Nanogenerators have emerged as a lightweight, low-cost, and efficient alternative to collect energy from both natural and artificial sources.
Article
Materials Science, Multidisciplinary
Yaokun Pang, Yuhui Fang, Jiaji Su, Huigang Wang, Yeqiang Tan, Changyong (Chase) Cao
Summary: A new triboelectric-electromagnetic hybrid nanogenerator (TEHG) has been developed, which combines a soft ball-based triboelectric nanogenerator (SB-TENG) and an electromagnetic generator (EMG) for efficient energy harvesting from low-frequency water waves. The critical parameters affecting the energy harvesting performance of the SB-TENG have been investigated, including the type of filled liquids, silicone shell thickness, number of layers, and added soft balls. Under an operating frequency of 1 Hz, the SB-TENG and EMG can reach a maximum output peak power of 0.5 and 8.5 mW, respectively. This study not only presents a new design and approach to enhance the output performance of TENGs, but also demonstrates the potential of a self-powered water-sensing system driven by low-frequency water waves.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Thermodynamics
Saurav Sharma, Raj Kiran, Puneet Azad, Rahul Vaish
Summary: Piezoelectric energy harvesting is an important technology in powering engineering devices, and it can also be used as a clean energy source. This article provides a comprehensive review of the technologies and methodologies used in piezoelectric energy harvesting tiles, including discussions on designs, mechanisms, and electrical circuits. Feasibility aspects from economic and energy perspectives are critically presented, along with challenges and possible solutions for implementing piezoelectric tiles.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Review
Chemistry, Physical
Yitong Wang, Zihua Li, Hong Fu, Bingang Xu
Summary: This article summarizes and discusses the design, fabrication, evaluation, and application of sustainable triboelectric nanogenerators (TENGs) based on recyclable materials. By using recycled materials to manufacture TENGs, it can overcome the material limitations and generate sustainable and renewable energy from waste materials.
Article
Chemistry, Physical
Kaveh Barri, Pengcheng Jiao, Qianyun Zhang, Jun Chen, Zhong Lin Wang, Amir H. Alavi
Summary: Researchers have introduced a novel concept called self-aware composite mechanical metamaterial (SCMM) that can transform mechanical metamaterials into nanogenerators and active sensing mediums. By studying new paradigms, they have achieved contact electrification between snapping microstructures composed of topologically different triboelectric materials, leading to self-powering and self-sensing meta-tribomaterial systems.
Article
Engineering, Chemical
Shuo Zhao, Hans-Christian Schneider, Marc Kamlah
Article
Mechanics
Verena Becker, Marc Kamlah
Summary: This paper presents a theoretical model for normal contact force of elastoplastic ellipsoidal bodies for use in mechanical discrete element method. The model is an extension of the Thornton model, incorporating elliptical contact areas and focusing on normal contact force description as a continuous function of time.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2021)
Article
Nuclear Science & Technology
M. Moscardini, S. Pupeschi, M. Kamlah
Summary: The research focuses on defining the macroscopic plastic strain of the bed by simulating the plastic deformation of individual pebbles, investigating different theories, and validating numerical results in the development of tritium breeder and neutron multiplier in the solid blanket concept.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Chemistry, Physical
Tao Zhang, Marc Kamlah
Summary: A chemo-mechanical phase-field model is developed to capture the complex phase segregation processes in NaxFePO4 (0 < x < 1), along with the structural changes during charging/discharging. The model constructs a multi-well potential for NaxFePO4 for the first time and investigates the microstructure evolution during sodiation and desodiation processes. Results suggest that the formation of an intermediate phase can reduce stress and improve mechanical stability, leading to better battery performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Chemical
Oleg Birkholz, Matthias Neumann, Volker Schmidt, Marc Kamlah
Summary: The study investigates the relationships between microstructure characteristics and effective transport properties of granular materials through modeling and simulation of sphere packings. It establishes formulas expressing effective transport properties of the considered sphere packings in terms of the mean contact angle and the standard deviation of the particle radii.
Article
Energy & Fuels
Adrian Schmidt, Elvedin Ramani, Thomas Carraro, Jochen Joos, Andre Weber, Marc Kamlah, Ellen Ivers-Tiffee
Summary: Porous electrode models are crucial for predicting the performance and lifetime of lithium-ion batteries inexpensively, but some simplifications in existing models may lead to limitations in accuracy, especially under high charge and discharge rates. By studying the effects of various microstructural characteristics on the validity of the models, insights are gained to improve the homogenized model and overcome existing limitations of the pseudo-2D approach.
Article
Energy & Fuels
Oleg Birkholz, Marc Kamlah
Summary: The hierarchically structured half-cell model for lithium-ion battery electrodes with porous secondary particles has been developed and validated through experiments. The study shows that the rate-limiting factor in this model differs from classical half-cell models, being the combination of electronic conductivity and inner morphology of the secondary particles.
Article
Energy & Fuels
Verena Becker, Oleg Birkholz, Yixiang Gan, Marc Kamlah
Summary: This article investigates the influence of particle shapes on the micromechanical responses during calendering in lithium-ion battery manufacturing, and their impact on the effective transport properties of battery electrodes. The study presents a novel algorithm for generating stress-free particle assemblies and calculates effective conductivities using a resistor network approach. The research provides insights into the interplay between calendering process, electrode microstructure, and effective conductivities of solid and pore phases.
Article
Materials Science, Multidisciplinary
Friedemann A. Streich, Alexander Martin, Kyle G. Webber, Marc Kamlah
Summary: A fully electromechanically coupled, three-dimensional phenomenological constitutive model was developed for relaxor ferroelectric materials, which can simulate the macroscopic electromechanical response of lead-free and non-lead-free relaxor materials. The model accounts for unique material properties, and its accuracy is validated through comparison with experimental data.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Jay Santoki, Simon Daubner, Daniel Schneider, Marc Kamlah, Britta Nestler
Summary: Transport mechanisms in battery systems are influenced by microstructural properties such as particle size, porosity, and tortuosity. A simulation study using a multiple particle model system and ellipsoid-like particles as an example was conducted. Results suggest that electrode structures impact transportation rates, with smaller particles limited by surface reactions and larger particles tending towards bulk-transport limited theory.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2021)
Editorial Material
Energy & Fuels
Thomas Wetzel, Wolfgang G. Bessler, Marc Kamlah, Hermann Nirschl
Article
Engineering, Chemical
Si Suo, Marigrazia Moscardini, Verena Becker, Yixiang Gan, Marc Kamlah
Summary: This study improved and adapted a thermo-mechanical discrete element method to investigate the evolution of thermal conductivity and stress on the grain scale of gas-filled granular materials. The simulation results showed that the thermal conductivity dropped significantly due to plastic deformation, but this effect could be suppressed by increasing the packing factor.
Article
Instruments & Instrumentation
Alexander Martin, Juliana G. Maier, Friedemann Streich, Marc Kamlah, Kyle G. Webber
Summary: The study examined the impact of ceramic-ceramic composite structures on the electromechanical response of lead-free ferroelectrics by manipulating local electrical and mechanical fields, and separating the relative contributions of PSC mechanisms.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Energy & Fuels
Nils Klasen, Friedemann Heinz, Angela De Rose, Torsten Roessler, Achim Kraft, Marc Kamlah
Summary: This work reports on the cracking mechanism observed on shingle solar cells in PV modules subjected to thermal cycling. Experimental investigations and structural mechanic simulations show that the cracks are limited to the joint area and occur on the rear side of the solar cells. The cracks are caused by the thermal contraction of the encapsulant.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Engineering, Multidisciplinary
Raghuram Karthik Desu, Yixiang Gan, Marc Kamlah, Ratna Kumar Annabattula
Summary: The macroscopic behavior and damage of an assembly of polydisperse spherical particles were studied using a numerical model based on DEM. The analysis revealed that the initial packing fraction, damage rate, and particle size variation all influence the macroscopic stress-strain response. Experimental data showed varying crush strengths for particles of the same size.
INTERNATIONAL JOURNAL OF ADVANCES IN ENGINEERING SCIENCES AND APPLIED MATHEMATICS
(2021)
