Article
Green & Sustainable Science & Technology
Lanka Tata Rao, Satish Kumar Dubey, Arshad Javed, Sanket Goel
Summary: Laser-induced graphene (LIG) is a three dimensional porous material with excellent properties, and in this study, a low-cost microfluidic fuel cell with LIG electrodes was proposed. By optimizing parameters, the performance of the fuel cell was enhanced.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Li Li, Lei Ling, Yajun Xie, Shuai Shan, Shaoyi Bei, Keqing Zheng, Qiang Xu
Summary: Counter-flow microfluidic fuel cell faces problems of non-uniform reaction rate distribution and poor electrode contribution. This study introduces a novel trapezoidal electrode design to improve its performance. Numerical analyses show that the isosceles trapezoidal electrode performs better than rectangular electrodes even at lower flow rates. The improved performance is attributed to the enlarged active region, reduced ionic resistance, and distinctive fluid distribution. Further optimization studies suggest that the isosceles trapezoidal design is preferred. Overall, the trapezoidal electrode shows promise for counter-flow microfluidic fuel cells and warrants further development.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Energy & Fuels
Muhammad Tanveer, Kwang-Yong Kim
Summary: A novel flow channel configuration of a membraneless microfluidic fuel cell (MMFC) with porous flow-through electrodes was numerically investigated, showing that a hollow structure in the central flow channel coupled with porous electrodes performed the best in terms of peak power density.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Ji-Hyun Oh, Muhammad Tanveer, Kwang-Yong Kim
Summary: A novel double-bridge shape was proposed for a membraneless microfluidic fuel cell, leading to improved electrochemical performance. Parameter studies showed that adjusting different channel parameters could optimize power density and enhance energy conversion efficiency in the fuel cell.
Article
Engineering, Manufacturing
Lanka Tata Rao, Satish Kumar Dubey, Arshad Javed, Sanket Goel
Summary: Membraneless Microfluidic Paper Fuel Cells (MMPFCs) have the advantage of eliminating the need for membrane and external pumps, and can provide enhanced energy densities through optimized configurations.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
(2021)
Article
Energy & Fuels
Biswajit Samir De, Joshua Cunningham, Neeraj Khare, Jing-Li Luo, Anastasia Elias, Suddhasatwa Basu
Summary: The study demonstrates the tandem operation of a membraneless, two-phase flow microfluidic electrolysis cell and fuel cell, which is a step towards developing an independent micropower source. By controlling the flow rate of electrolyte, gas product mixing and crossover can be avoided. The tandem operation of mu EC-mu FC in acidic and alkaline electrolytes shows stable and efficient characteristics.
Article
Engineering, Multidisciplinary
Jinchi Sun, Xiongwei Tian, Zhangqing Liu, Jie Sun, Menglian Zheng
Summary: Microfluidic fuel cells can be used as micro-scale power sources due to their potential high energy densities. However, they often face mass transfer limitations in diffusion transport. To overcome this issue, a novel design that integrates slanted groove micro-mixers on the side walls of the channel is proposed, which enhances mass transfer and improves convective mixing. Additionally, a simplified mass transfer model and a dimensionless correlation are developed to analyze the effects of design parameters on the limiting current density.
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2023)
Article
Electrochemistry
Noh Hyun Park, Jinyong Kim, Yoomin Ahn
Summary: A membraneless microfluidic fuel cell micromachined with a fabric substrate is proposed to improve the longevity of self-pumping microfluidic fuel cells. The fabric substrate provides good longevity and passive pumping. The effects of fabric properties and electrode configuration on the novel single-layer fuel cell are investigated.
ELECTROCHIMICA ACTA
(2023)
Article
Energy & Fuels
Ji-Hyun Oh, Tien-Dung Vuong, Kwang-Yong Kim
Summary: This work conducted a design optimization study to improve the performance of a membraneless microfluidic fuel cell with a double-bridge cross-section of the flow channel. The governing equations were solved numerically to analyze the electrochemical phenomena and evaluate the performance of the fuel cells. Optimization was performed using a genetic algorithm combined with a surrogate model to maximize the peak power density. The optimal design showed a 57.6% increase in peak power density compared to the reference design.
Article
Thermodynamics
Li Li, Hongkang Wang, Shaoyi Bei, Yuanjiang Li, Yanyun Sun, Keqing Zheng, Qiang Xu
Summary: This study investigates the design and operation of a counter-flow microfluidic fuel cell and finds that the size and position of the electrode effective zone vary under different operation conditions. It is also discovered that the cathode length should be smaller than the anode length due to faster diffusion rate and improved electrochemical reaction rate. Concentration-related activation loss plays a key role in the performance of the fuel cell, and unequal initial flow rates are preferred over unequal initial reactant concentrations.
Article
Green & Sustainable Science & Technology
Li Li, Lei Ling, Yajun Xie, Shuai Shan, Shaoyi Bei, Yanyun Sun, Keqing Zheng, Qiang Xu
Summary: This study investigates the requirements in geometrical design, electrode material, and operation parameter to achieve significantly improved fuel utilization under high flow rates in microfluidic fuel cells. It is found that simply increasing the electrode width or length cannot bring satisfactory fuel utilization, but optimizing the electrode aspect ratio could simultaneously enhance fuel utilization and current density. Developing advanced electrode material, particularly increasing the specific surface area, is shown to be more promising than geometrical optimization in improving fuel utilization in high flow rate systems where there is a mass transfer limitation.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Agricultural Engineering
Dang Dinh Nguyen, Thinh Quy Duc Pham, Muhammad Tanveer, Haroon Khan, Ji Won Park, Cheol Woo Park, Gyu Man Kim
Summary: This study introduces a deep learning-based method to optimize the performance of a membraneless microfluidic fuel cell. By combining artificial neural network (ANN) and genetic algorithm (GA), the method achieves a high level of accuracy in determining the optimal inputs for maximum power density.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Alonso Moreno-Zuria, Abraham Ulises Chavez-Ramirez, Mohamed Mohamedi
Summary: A 3-D model is established to understand the behavior of microfluidic channels, and the results show a good agreement between experiments and simulations. By reducing the gap between the anode and the cathode, the power output and fuel utilization are improved. Additionally, a proof of concept is demonstrated with a stack of three microfluidic channels, showing potential for low power electronic applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
Li Li, Yajun Xie, Shuai Shan, Lei Ling, Shaoyi Bei, Keqing Zheng, Qiang Xu
Summary: This study optimizes the reactant delivery system in MFCs with porous electrodes by constructing a two-dimensional model and conducting systematic analyses. The results show that the size of inlet reservoir can be greatly reduced without sacrificing the cell performance. In cases with high flow rates, there is more flexibility in the reactant inlet size, while larger inlet size is preferred in cases with low flow rates. The optimal inlet position varies depending on the dominant factor affecting performance loss.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Tricia Nguyen, Y. Meriah Arias-Thode, Anna Obraztsova, Angelica Sarmiento, Alexander Stevens-Bracy, Dragoslav Grbovic, Emil P. Kartalov
Summary: Benthic Microbial Fuel Cells are an environmentally compatible energy resource that relies on biological factors and engineering design. This study successfully improved BMFC power production performance by enhancing engineering design factors.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Seung Yong Hwang, In Jae Seo, Seung Yong Lee, Yoomin Ahn
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2015)
Article
Engineering, Electrical & Electronic
Seung-Wu Lee, Yoomin Ahn
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2015)
Article
Biochemical Research Methods
Taemin Limi, Seung Yong Lee, Jeongsuong Yang, Seung Yong Hwang, Yoomin Ahn
Article
Engineering, Industrial
Yoomin Ahn, Seoung Hwan Lee
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2017)
Article
Chemistry, Physical
Seoung Hwan Lee, Yoomin Ahn
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Physical
Joon Yong Yoon, Yoomin Ahn, Uwe Sehroeder
JOURNAL OF POWER SOURCES
(2018)
Article
Engineering, Manufacturing
Yoomin Ahn, Seoung Hwan Lee
MACHINING SCIENCE AND TECHNOLOGY
(2019)
Article
Biochemical Research Methods
Yong-Jun Ko, Joon-Ho Maeng, Seung Yong Hwang, Yoomin Ahn
Article
Energy & Fuels
Seoung Hwan Lee, Yoomin Ahn
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2019)
Article
Chemistry, Physical
Do-Gyun Jung, Yoomin Ahn
JOURNAL OF POWER SOURCES
(2020)
Article
Energy & Fuels
Taeseong Choi, Noh Nyun Park, Yoomin Ahn
Summary: The study proposes co-laminar flow microbial fuel cells with flow-through electrodes to improve power density and optimizes fuel cell performance through microfabrication technology. The research provides valuable insights for the commercialization of microfluidic MFCs as power sources for portable medical and electronic instruments.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Biophysics
Myunghun Kim, Youngju Kwon, Yoomin Ahn
Summary: This study developed eco-friendly and disposable paper-based membraneless microfluidic enzymatic fuel cells (EFCs) without any mediators to reduce toxicity and cost. Glucose oxidase and laccase were immobilized on multi-walled carbon nanotube electrodes to catalyze the redox reaction of glucose and oxygen, with experimental results showing that glucose concentration affects cell performance.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Hyeong-Min Cho, Hongyoung Ha, Yoomin Ahn
Summary: This study reports the development of a co-laminar flow microbial fuel cell (MFC) with microfabricated single-walled carbon nanotube (SWCNT) electrodes using electrophoretic deposition. The study investigates the effects of flow channel height and shear stress on the performance of the MFC, showing that adjusting both parameters can improve power density but decrease fuel utilization. The developed MFC with its high power density has great potential for research and applications compared to traditional metal-based electrode MFCs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Electrochemistry
Noh Hyun Park, Jinyong Kim, Yoomin Ahn
Summary: A membraneless microfluidic fuel cell micromachined with a fabric substrate is proposed to improve the longevity of self-pumping microfluidic fuel cells. The fabric substrate provides good longevity and passive pumping. The effects of fabric properties and electrode configuration on the novel single-layer fuel cell are investigated.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Cheon Ho Lee, Hongyoung Ha, Yoomin Ahn, Hong Liu
Summary: This paper presents a novel design and operation of microbial fuel cells (\MFCs) with monolayer paper-based substrate/electrodes and microchannels with co-laminar flow. The performance is significantly improved with the incorporation of a double-inlet and diverging channel design. The developed MFCs achieve a peak power density of 19.4μW cm-2 and maximum current density of 190.4μA cm-2, surpassing the performance of previously reported paper-based single MFCs.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)