Article
Chemistry, Physical
Wu Yujing, Zhou Hongxiu, Zhang Ao, Zhao Leqing
Summary: The research shows that flowing electrode direct methanol fuel cell (FEDMFC) effectively reduces methanol crossover rate while maintaining high power densities. Increasing flow rate can decrease crossover rate but will affect efficiency and stability, with optimal flow rate controlled at 1-3 sccm.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Haibo Gan, Hai Sun, Yujiang Song
Summary: This paper presents an advanced sensor-less method for monitoring methanol concentration in the rest cycle of a DMFC. The rationality of the method is confirmed through sensitivity analysis experiments and the accuracy is assessed through 1,900 experiments under random conditions. The results demonstrate the desired accuracy and stability of the sensor-less method, suggesting promising applications in various scenarios.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Li Liang, Zuo Zicheng, He Feng, Jiang Zhongqing, Li Yuliang
Summary: An ultrathin layer of nitrogen-rich GDY film is prepared to retard methanol permeation in direct methanol fuel cells, significantly increasing selective suppression of methanol transfer and improving power performance and long-term stability of the cell.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2021)
Article
Electrochemistry
Mohamed E. Abdelrahman, Hanguang Zhang, Gang Wu, Xianglin Li, Shawn Litster
Summary: In this study, a platinum group metal-free Fe-N-C catalyst derived from metal organic framework precursors was evaluated for the cathode side of a direct methanol fuel cell. The catalyst exhibited high performance under liquid methanol and air operation, with the cathode contributing significantly to the voltage loss. Improvements in catalyst layer fabrication were identified through nanoscale X-ray computed tomography.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Ekaterina V. Gerasimova, Sofia A. Kleinikova, Nataliia V. Talagaeva, Konstantin V. Gor'kov, Maria G. Levchenko, Ekaterina V. Zolotukhina
Summary: This article discusses the importance of synthesizing novel Pt-containing catalysts to achieve high electrocatalytic activity and emphasizes the significance of studying the electrochemical properties of these catalysts. The methodology in characterizing the catalysts is explored through experiments, and several factors that affect the characterization are discussed. Proposed modifications to improve the accuracy of measuring electroactive surface area and the choice of electrolyte for model experiments are suggested.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Jing Zhou, Jiamu Cao, Yufeng Zhang, Junfeng Liu, Junyu Chen, Mingxue Li, Weiqi Wang, Xiaowei Liu
Summary: This paper discusses the Chinese government's policies supporting methanol fuel applications and the vast potential of direct methanol fuel cells in the era of green development. It highlights the importance of reducing the methanol permeability of polymer electrolyte membranes as a fundamental way to lessen or eliminate methanol crossover.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Thanarajan Kumaresan, Dineshkumar Ponniyan, Mathan Chandran, Jegathishkumar Ramasamy, Velarasan Venkatachalam, Karthikeyan Palaniswamy, Senthilarasu Sundaram
Summary: In this study, the overall performance of a direct methanol fuel cell with an active area of 100 cm(2) was experimentally tested under different operating situations. The most influencing parameters, such as anode flow rate, cathode reactant, and cathode flow rate, were compared in terms of their performance output. Additionally, the performance of different cathode flow channels, namely serpentine and sinuous, were compared to improve reactant supply. Using sinuous flow field at the cathode and specific methanol and oxygen flow rates, a maximum power density of 24 mW/cm(2) was achieved.
Article
Chemistry, Physical
Dan Fraenkel
Summary: The study found that aqueous sulfuric acid exhibits typical strong 1-3 electrolyte behavior, proposed a molecular formula and dissociation products, and the latest theoretical analysis confirmed the previous findings based on activity. However, dilute sulfuric acid in pure methanol follows the conventional H2SO4 dissociation pattern, showing a 'mixed 1-1/1-2' electrolyte behavior.
Article
Chemistry, Multidisciplinary
Xiaohang Li, Tingting Chao, Yu-E Duan, Yunteng Qu, Yongning Liu, Qiang Tan
Summary: Flexible devices are widely used in wearable and portable devices, while fuel cells are considered environmentally friendly and safe for future energy development. This article presents a strategy for high-performance, stable, and flexible direct methanol fuel cells based on a gel electrolyte and single-atom catalyst. The flexible DMFC showed excellent power density at 30 degrees C and stability under different bending degrees.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Materials Science, Ceramics
Mohammad Bagher Askari, Parisa Salarizadeh, Antonio Di Bartolomeo, Mohammad Hassan Ramezan Zadeh, Hadi Beitollahi, Somayeh Tajik
Summary: The hybrid of MgCo2O4 with reduced graphene oxide (rGO) serves as an efficient and low-cost catalyst for the anode of direct methanol fuel cells (DMFC). The pivotal role of rGO in the structure of MgCo2O4-rGO catalyst was demonstrated through various tests, showing significantly improved power density. Practical single-cell tests confirmed the suitability of the proposed catalyst for DMFC applications, with power density enhancements observed with MgCo2O4-rGO-based anode compared to MgCo2O4-based anode.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Suba Lakshmi Madaswamy, Asma A. Alothman, Murefah Mana AL-Anazy, Ahmad A. Ifseisi, Khadraa N. Alqahtani, Sendhil Kumar Natarajan, Subramania Angaiah, Dhanusuraman Ragupathy
Summary: Polyaniline plays a significant role in direct methanol fuel cells due to its high conductivity, unique redox properties, high flexibility, better solubility, reasonable stability, ease of synthesis, and low cost. This review discusses in detail the nanocomposites of polyaniline with other electrochemically active materials and nitrogen-doped carbon materials derived from PANI-based nanocomposites.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Energy & Fuels
Haibo Gan, Hai Sun
Summary: This paper presents a novel methanol sensor-less startup control (SLSC) algorithm for direct methanol fuel cells (DMFCs), based on the unimodal relationship of current vs. methanol concentration. Experimental results showed that the SLSC algorithm is capable of starting a DMFC under various initial concentrations and temperatures, and can be adjusted to reduce startup time or improve energy efficiency.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Diyan ul Imaan, Fasil Qayoom Mir, Babar Ahmad
Summary: The proton exchange membranes fabricated using polyvinyl alcohol and alpha alumina show high mechanical stability and thermal performance as well as other important parameters like water uptake and ion exchange capacity. In DMFC testing, the membranes exhibit good performance at 60 degrees Celsius.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Samuel Jeong, Tatsuhiko Ohto, Tomohiko Nishiuchi, Yuki Nagata, Jun-ichi Fujita, Yoshikazu Ito
Summary: To realize advanced fuel-cell technology, proton exchange membranes with high proton conductivity and low crossover of fuel molecules are required. In this study, a simple yet powerful method is proposed to optimize the crossover-conductivity relationship by using sulfanilic-functionalized holey graphenes supported by a Nafion membrane. The results show significant reduction in crossover and proton conductivity, indicating potential for application in advanced fuel cells that use methanol and formic acid as chemical fuels.
Article
Agricultural Engineering
Jianming Guo, Jing Li, Dylan Liu, Yong Xu
Summary: Lignocellulosic biomass, consisting of hemicellulose, lignin, and cellulose, has different effects on the enzymatic digestibility of cellulose. This study successfully overcame the key obstacles to the enzymatic digestibility of poplar cellulose by utilizing three different technologies, resulting in the conversion of cellulose to glucose.
BIORESOURCE TECHNOLOGY
(2024)
Review
Energy & Fuels
Olgun Konur, C. Ozgur Colpan, Omur Y. Saatcioglu
Summary: This article presents a comprehensive review of the marine ORC systems and the potential waste heat recovery options on marine vessels. It shows that ORC systems can significantly improve the energy efficiency of marine vessels, especially with the utilization of LNG waste heat. However, there are also technical and economical challenges with the use of marine ORC systems.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Guvenc Umur Alpaydin, Gizem Nur Bulanik Durmus, C. Ozgur Colpan, Yilser Devrim
Summary: In this study, a mathematical model of a direct dimethyl ether fuel cell (DDMEFC) was developed to investigate the impact of operating conditions on voltage losses and cell performance. Experimental data was used to determine the values of modeling parameters. The effects of synthesized catalysts and operating conditions on cell performance were discussed by comparing activation polarization, ohmic polarization, and polarization curves.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Gizem Nur Bulanik Durmus, C. Ozgur Colpan, Yilser Devrim
Summary: In this study, the purification of hydrogen from a H-2:CO2:CO mixture using a high-temperature electrochemical purification system was investigated. It was found that the operating temperature had the greatest impact on performance, with hydrogen purity reaching 99.999% at 160 degrees C. Gas mixtures containing CO showed better performance at 180 degrees C, while the gas mixture without CO performed best at 160 degrees C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Alper Can Ince, Mustafa Fazil Serincan, C. Ozgur Colpan
Summary: This paper aims to identify the irreversibilities in the condenser of a direct methanol fuel cell (DMFC) system and present possible enhancements in its design through local entropy generation analysis (L-EGA). The study calculates the local entropy generation terms originating from heat and mass transfer in the condenser under variable operating conditions. The results show differences in irreversibilities due to heat and mass transfer, and the exergy destruction ratio provides an estimation of the condenser's exergy performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Mustafa Kececi, C. Ozgur Colpan, T. Hikmet Karakoc
Summary: Airport ground operations have a significant impact on the environment. Various innovative solutions have been proposed to reduce carbon emissions. This study designs a system that meets the energy requirements for aircraft taxiing using an external fuel cell hybrid power unit, and simulates the physical data of the system. The results show that using this system can significantly reduce CO2 emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Physical
Ozgun Tezer, Nazlican Karabag, Atakan Ongen, Can Ozgur Colpan, Azize Ayol
Summary: Gasification process is an effective route for energy recovery from biomass, producing hydrogen-rich syngas. This paper provides a review of biomass gasification, comparing and analyzing different gasification models, designs, configurations, and operational conditions. It aims to present a holistic approach for hydrogen-rich syngas production based on current technologies, techno-economic analysis, and industrial/commercialization pathways. The article emphasizes the need to improve biomass gasification technologies for hydrogen production, considering global environmental and economic issues.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Editorial Material
Thermodynamics
T. Hikmet Karakoc, Can Ozgur Colpan, Selcuk Ekici, Ozge Yetik
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2022)
Article
Thermodynamics
Yagmur Nalbant Atak, C. Ozgur Colpan, Adolfo Iulianelli
Summary: Currently, most of the world's hydrogen production relies on the steam reforming of natural gas, which has some disadvantages. To overcome these issues, membrane reactors have been introduced as a new method that can generate and separate hydrogen in the same unit, while operating under milder conditions. This technology has great potential in the field of hydrogen production and decarbonization.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Review
Energy & Fuels
Anil Erdogan, Beyza Dursun, C. Ozgur Colpan, Azize Ayol
Summary: The integration of solid oxide fuel cell (SOFC) and biomass gasification system offers a promising solution for generating electricity and thermal energy from biomass with high efficiency and low environmental impact. Various configurations, including organic Rankine cycle, gas turbine, and electrolysis, have been proposed to enhance the performance of these systems. This review study summarizes the different system layouts and discusses modeling, optimization techniques, and analysis methods used in evaluating the performance, cost, and environmental impact of these integrated systems. Among the configurations reviewed, the system consisting of a biomass gasifier, a SOFC, and a micro-scale gas turbine was found to be highly efficient, while the integrated system with a biomass gasifier, a SOFC, a gas turbine, and an organic Rankine cycle had the lowest unit electricity cost. Exergo-economic analysis and life cycle assessment were identified as the most comprehensive methods for economic and environmental analyses, respectively.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Editorial Material
Chemistry, Physical
Sandro Nizetic, Can Ozgur Colpan
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Olgun Konur, Onur Yuksel, S. Aykut Korkmaz, C. Ozgur Colpan, Omur Y. Saatcioglu, Ilker Muslu
Summary: This study proposes a novel organic Rankine cycle (ORC) system utilizing waste heat from cargo oil pump turbines (COPT) for waste heat recovery in tanker ships. The optimal heat exchanger network was designed and energy and exergy analyses were conducted to assess the economic viability. Results show that COPT waste heat can reduce energy costs and improve the economic performance of the system.
JOURNAL OF CLEANER PRODUCTION
(2022)
Editorial Material
Engineering, Aerospace
Tahir Hikmet Karakoc, Can ozgur Colpan, Ozge Yetik, Alper Dalkiran
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2023)
Review
Energy & Fuels
Sera Ayten Cetinkaya, Tacettin Disli, Gamze Soyturk, Onder Kizilkan, C. Ozgur Colpan
Summary: Hydrogen is becoming increasingly important in the clean energy transition, and the safe and high-density storage of hydrogen is crucial in the hydrogen ecosystem. Metal hydride storage appears to be superior to compressed gas storage, but thermal management is a challenge that needs to be addressed. This study provides a comprehensive review of heat transfer, thermal management techniques, and studies on the thermal management of metal hydride tanks in integrated systems with fuel cells and/or electrolyzers.
Article
Thermodynamics
Olgun Konur, Onur Yuksel, S. Aykut Korkmaz, C. Ozgur Colpan, Omur Y. Saatcioglu, Burak Koseoglu
Summary: This study focuses on the potential fuel-saving and sustainability performance of a tanker ship's power generation plant by integrating an ORC system, which reduces the number or load of generators. The integration of the Organic Rankine Cycle (ORC) system resulted in a 15% reduction in fuel consumption from diesel generators and a total fuel consumption reduction of 5.16% for the vessel. The operation-dependent indicators were affected by operations with longer working hours.
Article
Energy & Fuels
Alper Can Ince, C. Ozgur Colpan, Ali Keles, Mustafa Fazil Serincan, Ugur Pasaogullari
Summary: This study presents a scaling and performance assessment of a power-to-methane system based on a new operation strategy. A mathematical model is developed for the CO2 methanation fixed bed reactor, PV panels, and alkaline electrolyzer. The model is compared with experimental study and used to simulate a small scale PtM system. The system's electrical efficiency is found to be between 55 and 59% under variable operating conditions.
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)
