Review
Energy & Fuels
Nur Ain Masleeza Harun, Norazuwana Shaari, Nik Farah Hanis Nik Zaiman
Summary: SPEEK is recognized as a promising alternative PEM in fuel cell applications due to its advantageous properties, but its proton conductivity is influenced by the degree of sulfonation. While high DS of SPEEK can produce high proton conductivity, excessive production of DS may have side effects on membrane stability. Therefore, finding the optimal DS of SPEEK is crucial for fabricating PEM alternatives.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Physical
M. A. Aminudin, S. K. Kamarudin, B. H. Lim, E. H. Majilan, M. S. Masdar, N. Shaari
Summary: Due to the harmful consequences of pollutants emitted by conventional fuel cars, vehicle manufacturers are shifting towards alternative energy sources. Fuel cells (FCs) are considered as highly efficient and non-polluting power sources capable of delivering greater energy densities and efficiency than conventional technologies. Proton exchange membrane fuel cells (PEMFC) are promising in transportation sectors due to their ability to start at cold temperatures and minimal emissions. This article discusses the pros and cons of the technology, various fuel cell types, their applications, and recent issues associated with fuel cell technology in the automobile sector.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Beant Singh, Parag Nijhawan, Manish Kumar Singla, Jyoti Gupta, Parminder Singh
Summary: Proton Exchange Membrane Fuel Cells (PEMFC) have numerous advantages and wide applications, making it crucial to accurately estimate their parameters. In this study, a new hybrid algorithm is proposed and compared with other algorithms, showing superior performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Environmental Sciences
Asif Jamil, Sikander Rafiq, Tanveer Iqbal, Hafiza Aroosa Aslam Khan, Haris Mahmood Khan, Babar Azeem, M. Z. Mustafa, Abdulkader S. Hanbazazah
Summary: Fuel cells are environmentally friendly technology with high efficiency and economic advantages. Proton exchange membranes, especially for hydrogen fuel cells, have great potential but face challenges in terms of cost and degradation of proton exchange capacity over time.
Article
Chemistry, Physical
Shikun Zhou, Gongnan Xie, Haibao Hu, Meng Ni
Summary: Proton exchange membrane fuel cells (PEMFCs) are clean and efficient power sources. The proposed new gas diffusion layer (GDL) with non-uniform distribution of PTFE effectively removes water from the catalyst layer (CL), improving fuel cell performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Sahng Hyuck Woo, Nak Jun Lee, Seung Ho Yook, Hee Soo Kim, Jieun Choi, Jae-Hun Kim, So Young Lee, Jong Hyun Jang, Sung Jong Yoo, Young-Gi Yoon, Jonghee Han, Hyoung-Juhn Kim
Summary: This research used an imaging technique to find new reasons for the reduced performance of polymer electrolyte fuel cells (PEFCs). H+ and OH- indicator sensors were attached to each electrode of a membrane electrode assembly and quantitative analysis of ion generation was conducted using digital microscopes. The proposed reactions in the fuel cell were confirmed and various reactions occurring in the electrode were examined.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Physical
E. Pahon, D. Hissel, N. Yousfi-Steiner
Summary: This paper reviews the accelerated stress testing in fuel cell stack testing, including degradation mechanisms and testing protocols for different components. In addition to the standardized testing methods provided by the Department of Energy, other recent testing protocols are also reviewed.
JOURNAL OF POWER SOURCES
(2022)
Article
Thermodynamics
Hegazy Rezk, A. G. Olabi, Seydali Ferahtia, Enas Taha Sayed
Summary: In this study, a novel identification approach based on the bald eagle search algorithm (BES) is suggested for estimating the characteristics of proton exchange membrane fuel cells (PEMFC). The BES method outperforms other algorithms and provides accurate results.
Article
Engineering, Chemical
Ping-Yen Chen, Tse-Han Chiu, Fan-Jie Lin, Jyh-Chien Chen
Summary: Two novel tetraamines have been synthesized, and polybenzimidazoles with outstanding thermal stability, solubility, and oxidative stability have been prepared. The resulting membranes exhibit excellent tensile strength, proton conductivity, and peak power density, making them promising candidates for high-temperature proton exchange membrane fuel cell (HT-PEMFC) applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Guofeng Li, Ruxing Shen, Shengliang Hu, Bin Wang, Hassan Algadi, Chao Wang
Summary: The fuel cell is a clean and widely used energy conversion device, and the proton exchange membrane is a crucial component in the fuel cell. However, commercial proton exchange membranes have high cost and performance issues, necessitating the exploration of new alternatives. In this study, blended membranes were prepared using different sulfonated polyimide (SPI) in polynorbornene-3,6-bridged methylene-1,2,3,6-tetrahydro-N-(6'-aminohexyl)-cis-phthalimide (PNBN)/sulfonated polyimide (SPI) acid-base blended membranes, and their effects on achieving high proton conductivity at low ion exchange capacity (IEC) were investigated. The results showed that the acid-base blending membranes exhibited low IEC and increased ion conductivity with the increase of SPI ratio, making them suitable for use in proton exchange membrane fuel cells (PEMFC).
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Energy & Fuels
Di Wu, Kai Li, Yan Gao, Cong Yin, Hao Tang
Summary: This study investigates the coupling effects among components and the influence of operating conditions on internal parameters in a proton exchange membrane fuel cell system. Results show that higher ambient temperatures significantly increase auxiliary power consumption and decrease system efficiency, which can help reduce development costs.
Review
Chemistry, Physical
Jin-Rong Li, Ming-Xu Liu, Xia Liu, Xiang-Hui Yu, Qin-Zhu Li, Qi Sun, Tong Sun, Shuang Cao, Chun-Chao Hou
Summary: This paper provides an overview of the latest advances in ORR catalysts, with a focus on their performance at the MEA level. It aims to offer novel and systemic insights for innovative and efficient ORR catalyst design and applications in PEMFCs.
Article
Chemistry, Physical
Ye Peng, Ja-Yeon Choi, Liliang Tian, Kyoung Bai, Yi Zhang, Dongchu Chen, Jianhuang Zeng, Dustin Banham
Summary: The distribution of platinum group metal (PGM) nanoparticle catalysts in the carbon support significantly affects the catalyst's performance. The placement of Pt either on the outer surface or within the pores of the carbon results in different activity and performance at high current densities. To gain further insight into the catalyst's properties, a relationship between Pt distribution and relative humidity (RH) tolerance is explored. This work provides valuable information for MEA designers in selecting catalysts for specific applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Uday Raj Singh, Satyasekhar Bhogilla, Ines Hauer
Summary: With the increasing use of fossil fuels, it is crucial to develop new technologies based on renewable energy sources for fuel-powered vehicles. A fuel cell is an electrochemical cell that converts fuel energy directly into electricity. Fuel cells have advantages such as small size, high efficiency, and silent operation. This paper focuses on the performance evaluation of an integrated system consisting of a Polymer Exchange Membrane Fuel Cell (PEMFC) and a vapor adsorption refrigeration system to simultaneously produce electric power and cooling effect. The study demonstrates a significant improvement in the performance of the integrated system compared to PEMFC alone, with maximum system energy and exergy efficiency achieved at 63.01% and 29.88% respectively. In addition, a maximum energy efficiency of 65.39% is reported at an evaporator temperature of 5 °C and a current density of 0.8 A/cm2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Aogui Wu, Jianfa Liu, Jinzhen Huang, Yu Min, Yitong Wang, Shichao Wang, Lei Wang
Summary: Constructing high-density hydrogen bonding networks is important for improving the proton conductivity of proton exchange membranes (PEMs) and the single-cell output power of high-temperature fuel cells (HTFCs). In this study, a series of benzimidazole polymers containing a pyridine group were successfully synthesized via copolymerization. The high-density hydrogen network was constructed by blending different polymers and using a cross-linking agent. The results showed significantly enhanced proton conductivity and output power density of the single cell.
ACS APPLIED ENERGY MATERIALS
(2022)
Review
Chemistry, Physical
Qian Zhang, Corinna Harms, Jens Mitzel, Pawel Gazdzicki, K. Andreas Friedrich
Summary: This article discusses the challenges and methods to improve the durability of polymer electrolyte membrane fuel cells, focusing on the reliable determination of degradation rates and lifetime, as well as the use of efficient recovery procedures to differentiate reversible and irreversible voltage losses.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Suriya Venkatesan, Jens Mitzel, Karsten Wegner, Remi Costa, Pawel Gazdzicki, Kaspar Andreas Friedrich
Summary: The limited scalability and multi-step processing of the conventional synthesis routes for electrocatalysts, their supports and thin functional films remain a challenge in the inexpensive production of energy materials and cells. Flame spray pyrolysis (FSP) offers a solution by providing a simple, rapid, scalable and single-step fabrication technique.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Electrochemistry
Christophe Gerling, Matthias Hanauer, Ulrich Berner, K. Andreas Friedrich
Summary: The low-frequency inductive features in PEMFC have been investigated by differential measurements and numerical simulation. The contributions of slow platinum oxide kinetics and ionomer humidification are examined, with the latter found to be more relevant at medium to high currents. The inductive loops exhibit a strong dependence on current density and relative gas humidity, and can reach over 150 mV dec(-1) at high load.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Marius Tomberg, Marc P. P. Heddrich, S. Asif Ansar, K. Andreas Friedrich
Summary: Electrolysis systems with solid oxide cell (SOC) reactors have high efficiency and flexibility, and can achieve fast and robust transient operation through developed operation strategies. Experimental results show that using SOC systems can greatly reduce start-up time and temperature gradients, and achieve fast power modulation.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Analytical
Luca Cressa, Yanyan Sun, Dustin Andersen, Mathieu Gerard, Olivier De Castro, Dennis Kopljar, Maryam Nojabaee, Kaspar Andreas Friedrich, Guido Schmitz, Tom Wirtz, Santhana Eswara
Summary: The global transition to green energy highlights the importance of efficient and reliable energy storage systems. Advanced analysis and characterization of battery materials are crucial for understanding their properties and continued development. A new operando methodology has been developed to analyze solid-state batteries (SSBs) structurally and chemically during different stages of cycling. This method allows for analysis without transferring samples between instruments and provides a direct correlation between microstructure, chemical composition, and electrochemical performance.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sebastian C. H. Bragulla, Julian Lorenz, Corinna Harms, Michael Wark, K. Andreas Friedrich
Summary: This study developed an ion chromatography (IC) method for quantitative trace analysis of ammonium in 0.1 M sulfuric acid electrolyte, and applied it to EAS gas-diffusion electrode (GDE) experiments with commercial chromium nitride as electrocatalyst. The IC method achieved a highly sensitive, versatile, and reliable analysis with a limit of quantification (LOQ) of 6 mu g l(-1) ammonium. The impacts of various factors on the quantitative analysis by IC were analyzed, and the practical guide provided is relevant for the field of EAS.
Article
Engineering, Chemical
Ziqi Xu, Vincent Wilke, Jagoda Justyna Chmielarz, Morawietz Tobias, Vladimir Atanasov, Aldo Saul Gago, Kaspar Andreas Friedrich
Summary: In this study, a new type of anion exchange membrane with a styrene-b-ethylene-b-butylene-b-styrene copolymer (SEBS) backbone and piperidinium functioned flexible ethylene oxide spacer structure as its side-chains (SEBS-P2O6) was developed. The membrane exhibited a hydroxide ion conductivity of 20.8 mS cm-1 at room temperature, higher than the previously obtained piperidinium functionalized SEBS membrane with 10.09 mS cm-1.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Electrochemistry
Chang Liu, Meital Shviro, Guido Bender, Aldo S. Gago, Tobias Morawietz, Michael J. Dzara, Indro Biswas, Pawel Gazdzicki, Zhenye Kang, Sarah F. Zaccarine, Svitlana Pylypenko, K. Andreas Friedrich, Marcelo Carmo, Werner Lehnert
Summary: The PTL/CL interface is crucial for the performance and efficiency of PEMWEs. This study compared the degradation of MEAs with uncoated and Ir-coated Ti PTLs during a 4000 h test. The results showed that the optimized interface formed with an Ir coating reduced the degradation of the MEA, without affecting the morphology change or oxidation of IrOx in the catalyst layer. Additionally, the ionomer loss and restructuring of the anodic MEA could also be reduced by the Ir coating of the PTL/CL interface. Optimizing the PTL/CL interface improves the performance and durability of PEMWEs.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Dmitry Galyamin, Jorge Torrero, Isabel Rodriguez, Manuel J. Kolb, Pilar Ferrer, Laura Pascual, Mohamed Abdel Salam, Diego Gianolio, Veronica Celorrio, Mohamed Mokhtar, Daniel Garcia Sanchez, Aldo Saul Gago, Kaspar Andreas Friedrich, Miguel A. Pena, Jose Antonio Alonso, Federico Calle-Vallejo, Maria Retuerto, Sergio Rojas
Summary: The study finds that low-ruthenium-content pyrochlores (R2MnRuO7, R = Y, Tb, and Dy) exhibit high activity and durability for the oxygen evolution reaction (OER) in acidic media. Among them, Y2MnRuO7 is the most stable catalyst, showing a voltage of 1.5 V at 10 mA cm(-2) for 40 h, or 5000 cycles up to 1.7 V. Experimental and computational results indicate that the excellent performance is attributed to the Ru sites embedded in RuMnOx surface layers. A water electrolyzer with Y2MnRuO7 and only 0.2 mgRu cm(-2) achieves a current density of 1 A cm(-2) at 1.75 V, remaining stable at 200 mA cm(-2) for over 24 h. These findings suggest further investigation on Ru catalysts with the goal of enhancing OER performance through a partial replacement of Ru with inexpensive cations. Ru-pyrochlores can serve as alternative anodes of PEM water electrolyzers, and their high performance is attributed to the Ru sites embedded in RuMnOx surface layers. The durability of a water electrolyzer with Y2MnRuO7 and only 0.2 mgRu cm(-2) has been successfully demonstrated.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jorge Torrero, Tobias Morawietz, Daniel Garcia Sanchez, Dmitry Galyamin, Maria Retuerto, Vlad Martin-Diaconescu, Sergio Rojas, Jose Antonio Alonso, Aldo Saul Gago, Kaspar Andreas Friedrich
Summary: In this study, an anode with reduced iridium loading (0.2 mg) compared to commercial proton exchange membrane water electrolysis (PEMWE) (2-3 mg) was developed, demonstrating high performance and stability for over 1000 hours. An advanced catalyst based on an Ir mixed oxide (Sr2CaIrO6) was used, which has an unconventional structure that contributes to the reduction of iridium in the catalyst layer. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed the reconfiguration of the ionomer in the catalyst layer, resulting in almost full coverage of the catalytic layer with ionomers.
ADVANCED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Sebastian Prass, Leon Nerlich, Rajveer Singh, Andres O. Godoy, Jasna Jankovic, K. Andreas Friedrich, Nada Zamel
Summary: A silicon oxide thin film is coated on platinum on graphitized low surface area carbon (Pt/C) to enhance the tolerance of proton exchange membrane fuel cells towards carbon monoxide and hydrogen sulfide contamination. The SiO2 coating improves the performance of SiO2-Pt/C when operated with pure hydrogen fuel, but performs worse than Pt/C when operated with CO-contaminated fuel. The SiO2 coating extends the lifetime of SiO2-Pt/C when operated with H2S in the fuel.
Article
Biochemistry & Molecular Biology
Ziqi Xu, Sofia Delgado, Vladimir Atanasov, Tobias Morawietz, Aldo Saul Gago, Kaspar Andreas Friedrich
Summary: Researchers have developed a new type of anion exchange membrane (SEBS-Py2O6) that exhibits high conductivity and shows promise for applications in water electrolysis. When combined with platinum-group-metal-free electrodes in an AWE water electrolysis cell, this membrane achieves a current density of 520 mA/cm^2 at 2 V. These findings demonstrate the potential of SEBS-Py2O6 membranes for efficient water electrolysis.
Article
Nanoscience & Nanotechnology
Joachim Haecker, Tobias Morawietz, Pia Lange, Zhirong Zhao-Karger, Tobias Morawietz, Indro Biswas, Norbert Wagner, Maryam Nojabaee, K. Andreas Friedrich
Summary: Magnesium-sulfur batteries have gained attention as potential post-lithium battery systems due to their high energy density, abundance of raw materials, and low cost. However, their cycling stability is still a challenge. This study demonstrates that the protection of the anode surface with an artificial solid electrolyte interphase (SEI) through an organic coating approach can effectively improve the electrochemical performance of magnesium-sulfur batteries. The coating reduces polarization overpotentials and inhibits the loss of sulfur, resulting in enhanced cycling efficiency and higher discharge capacity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Jakub K. Wlodarczyk, Norman Baltes, K. Andreas Friedrich, Jurgen O. Schumacher
Summary: Modelling and simulation are powerful tools for developing new flow cells like electrolysers and flow batteries. However, the non-ideal behavior of highly concentrated electrolytes poses challenges in conventional parameterization. This study focuses on investigating mass transport of electroactive species in highly-concentrated media, specifically studying hydrogen-bromine flow battery electrolyte using chronoamperometric techniques. The results show successful simulation of current densities using advanced mass transport theory, highlighting the importance of proper electrolyte characterization in establishing predictive models for electrochemical devices.
ELECTROCHIMICA ACTA
(2023)
Article
Electrochemistry
Christina Schmitt, Martina Gerle, Dennis Kopljar, K. Andreas Friedrich
Summary: Extensive parametrization is necessary for physicochemical modelling of lithium ion batteries. This study investigates two cells optimized for high power and high energy applications. The active material type, microstructure, conductivity, and mass loading of the electrodes are determined through various measurements. Laboratory cells are built from the extracted materials to evaluate tortuosity and exchange current density. The differences and similarities of parameters for both cell types are discussed and compared to literature, and then used for the parameterization of a P2D model.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(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)