Article
Chemistry, Physical
Cheng He, Ami C. Yang-Neyerlin, Bryan Pivovar
Summary: The role of membranes in determining water balance in AEMFCs is crucial but has been limitedly studied. This research presents a novel method for probing limiting current based on water flux, revealing water diffusion as a critical mechanism for achieving high current density performance and durability.
JOURNAL OF POWER SOURCES
(2022)
Article
Polymer Science
Jacqueline A. Maslyn, Louise Frenck, Vijay D. Veeraraghavan, Alexander Muller, Alec S. Ho, Nandan Marwaha, Whitney S. Loo, Dilworth Y. Parkinson, Andrew M. Minor, Nitash P. Balsara
Summary: The study shows that the limiting current density in composite electrolytes increases with the volume fraction of the PEO block. Using the concentrated solution theory enables accurate predictions of limiting current density, with quantitative agreement between experimental measurements and theoretical predictions.
Article
Chemistry, Multidisciplinary
Sooheon Cho, Byung Joo Jeong, Kyung Hwan Choi, Bom Lee, Jiho Jeon, Sang Hoon Lee, Bum Jun Kim, Jae-Hyun Lee, Hyung-Suk Oh, Hak Ki Yu, Jae-Young Choi
Summary: A quasi-one-dimensional van der Waals metallic nanowire Nb2PdS6 was synthesized and its electrical characteristics were analyzed. The study found that Nb2PdS6 exhibited high crystallinity and a high breakdown current density. Moreover, the breakdown mechanism of the nanowires was attributed to Joule heating and was well described by a 1D thermal dissipating model.
Article
Chemistry, Physical
Dabin Han, Maxwell Tsipoaka, Sangaraju Shanmugam
Summary: The study developed advanced membrane electrode assemblies with excellent durability and fuel cell performance that can operate under low humidity, enhanced by the interaction between ZrGdNR and ionomer. The significant increase in fuel cell performance and durability due to the presence of ZrGdNR in the catalyst layer may be a promising approach for low catalyst usage in PEMFCs operating under low humidification.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Min Wang, Wei Zhao, Shuhan Kong, Juntao Chen, Yunfei Li, Mengqi Liu, Mingbo Wu, Guanxiong Wang
Summary: To investigate the correlation between GDL structure and mass transport properties, a limiting current test was conducted on three representative GDLs with and without the microporous layer. The results showed that the transport resistance of GDLs was affected by the thickness and pore size distribution of the macroporous substrate and the MPL.
Article
Chemistry, Physical
Debendra Prasad Panda, Diptikanta Swain, Rajamani Raghunathan, A. Sundaresan
Summary: In this study, a newly synthesized lead-free organic-inorganic hybrid compound with one-dimensional chain structure is investigated. The compound exhibits interesting magnetic and photoluminescence properties, including long-range antiferromagnetic ordering and low-dimensional magnetic susceptibility hump. Additionally, the compound displays orange-red emission and shows evidence of electron-phonon coupling.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Multidisciplinary
Alexios Christopoulos, Pierre Le Doussal, Denis Bernard, Andrea De Luca
Summary: By using conformal field theory, we provide a universal description for the out-of-equilibrium dynamics of critical one-dimensional quantum systems perturbed by smooth noise coupled to the energy density. Contrary to the general expectation of heating, our results demonstrate the emergence of a nontrivial and universal stationary distribution with broad tails of physical quantities over the noise realizations. We validate our findings with analytical and numerical calculations for a chain of noninteracting spinless fermions.
Article
Biochemistry & Molecular Biology
Aminat Uzdenova
Summary: This article proposes a new method to describe the direct current mode in electromembrane systems, which does not require boundary conditions on the derivative of the potential. The essence of this approach is to replace the Poisson equation with the equation for the displacement current. Based on the displacement current equations, concentration profiles and electric fields were calculated, and it was found that the NPD approach has higher calculation accuracy compared to the NPP approach.
Article
Engineering, Electrical & Electronic
Yan Tao, Baohong Li, Tomislav Dragicevic, Tianqi Liu, Frede Blaabjerg
Summary: This article proposes a method to limit the pole-to-ground fault current in symmetrical mono-pole HVDC grid through topology optimization, implemented in three steps. The influence factors are clarified in the first step and a simplified index is proposed in the second step for estimating fault current level. The genetic algorithm is used in the final step to optimize the dc grid topology for limiting fault current level.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Electrochemistry
Youngwoo Choo, Rachel L. Snyder, Neel J. Shah, Brooks A. Abel, Geoffrey W. Coates, Nitash P. Balsara
Summary: We investigate a polyacetal-based electrolyte, P(2EO-MO), mixed with LiTFSI salt, and provide a comprehensive electrochemical characterization of its transport parameters and thermodynamic property compared to PEO electrolyte. While the steady-state current fraction of P(2EO-MO) electrolyte is higher than PEO electrolyte, the transference numbers calculated using concentrated solution theory show similar values. Experimental data and predicted values for salt concentration and limiting current density exhibit non-monotonic behaviors with offset peak positions. The limiting current density of P(2EO-MO) electrolyte is systematically lower than PEO electrolyte except for a specific salt concentration.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Tao Li, Yongli Li, Song Li, Wei Zhang
Summary: This article discusses a strong current-limiting control system suitable for AC microgrid faults, which can effectively reduce fault current, ensure distributed generators to continue operation without shutdown in the event of multiple faults. The method proposed in this article can also reduce current harmonics and asymmetric amplitudes.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Zhizheng Gan, Zhanqing Yu, Zipan Nie, Lu Qu, Xin Yan, Yulong Huang, Rong Zeng, Huaiguang Gu
Summary: This article proposes a coordinated interruption topology of a magnetic coupling FCL and hybrid DCCB. The influence of various parameters on the coordinated interrupting process is researched, and parameter optimization and economic analysis are carried out. Finally, a scaled test verifies the feasibility of the coordinated interruption strategy.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Chemistry, Physical
Ozcan Atlam, Gokhan Dundar
Summary: An alternative Equivalent Electrical Circuit for Proton Exchange Membrane Fuel Cells is modeled in this study, with good agreement between model results and measured values. The model suggests that current passes only on parallel resistance at no-load condition, indicating a FC with higher parallel resistance should be preferred. The proposed model allows for performance comparison of FCs based on defined parameters, and can be used for both steady state and transient analysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Tao Li, Yongli Li, Xiaolong Chen, Song Li, Wei Zhang
Summary: This study investigates a control method suitable for AC microgrid with strong current-limiting ability, achieving accurate power tracking through outer loop controller and inductance current tracking through inner loop controller to meet desired requirements for current harmonics and amplitudes.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Chemistry, Physical
Morio Tomizawa, Gen Inoue, Keisuke Nagato, Akihisa Tanaka, Kayoung Park, Masayuki Nakao
Summary: This study simulated the surface patterning of a polymer electrolyte membrane fuel cell (PEMFC) cathode using a unique simulation method. The results showed that surface patterning improves proton conduction and oxygen diffusion, leading to enhanced cell performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Shirin Mehrazi, Mrittunjoy Sarker, Felipe Mojica, Philip Rolfe, Po-Ya Abel Chuang
Summary: The relationship between the primary agglomerate structure in the ink and the morphological and surface properties of the dried layer is studied based on rheological properties. Samples with higher PTFE loading have a more inhomogeneous microstructure and form highly percolated agglomerates after coating. The microporous layer with a solid content of 10 wt.% and a PTFE loading of 25 wt.% is found to have an optimal morphology for oxygen transport under both dry and wet conditions. This study provides new insight into the optimization of microporous layer design and development.
ELECTROCHIMICA ACTA
(2021)
Article
Thermodynamics
Felipe Mojica, Md Azimur Rahman, Mrittunjoy Sarker, Daniel S. Hussey, David L. Jacobson, Jacob M. LaManna, Po-Ya Abel Chuang
Summary: The study compared four flow channel designs in proton exchange membrane fuel cells, finding that the three-dimensional nozzle design outperformed the others with higher peak power density and better water management capability.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Mrittunjoy Sarker, Md Azimur Rahman, Felipe Mojica, Shirin Mehrazi, Wilton J. M. Kort-Kamp, Po-Ya Abel Chuang
Summary: Enabling fuel cell operation at high current density requires addressing liquid water management issues, with PTFE impregnation and MPL showing potential performance improvements. Studies using experimental and computational techniques have revealed the effects of these materials, and a model has been developed to simulate fuel cell performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Md Azimur Rahman, Mrittunjoy Sarker, Felipe Mojica, Po-Ya Abel Chuang
Summary: This study presents a physics-based, steady-state, 1-D, non-isothermal, and two-phase PEMFC model that accurately simulates fuel cell performance. The results demonstrate that the model is able to reliably predict the total transport resistance under dry, transition, and wet regions and provides key insights into the relationship between catalyst utilization and electrode flooding.
Article
Thermodynamics
Benyamin Naranjani, Zabihollah Najafianashrafi, Christopher Pascual, Ireneo Agulto, Po-Ya Abel Chuang
Summary: This study developed a three-dimensional numerical model to optimize airflow and heat transfer in indoor systems considering factors such as transpiration, carbon dioxide consumption, and oxygen production. Through extensive research on eight designs, one specific case was found to be the most efficient with an objective uniformity of 91.7%. The results suggest that even with low mass flow rates, some cases are capable of providing uniform flow distribution, which can significantly reduce energy consumption.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Michael T. Castro, Joy Marie Mora, Nitul Kakati, Po-Ya Abel Chuang, Joey D. Ocon
Summary: This study developed a multiphysics model to elucidate the operating mechanism of a proton exchange membrane acid-alkaline electrolyzer, revealing that Na+ crossover is the primary mechanism for maintaining electroneutrality. Increasing the applied current reduces H+ crossover, but also decreases the overall efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Joy Marie Mora, Mrittunjoy Sarker, Zabihollah Najafianashrafi, Md. Azimur Rahman, Ami C. Yang-Neyerlin, Bryan Pivovar, Po-Ya Abel Chuang
Summary: An analytical and empirical-based 1-D, non-isothermal, steady-state model for anion exchange membrane fuel cell capable of capturing two-phase phenomena is proposed in this study. The model successfully predicts the cell performance and provides valuable insights for water management and optimal component design.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Heng Zhang, Mrittunjoy Sarker, Md Azimur Rahman, Zhigang Zhan, Pang-Chieh Sui, Po-Ya Abel Chuang
Summary: This study investigates the saturation distribution of two types of gas diffusion layer (GDL) materials in a proton exchange membrane fuel cell (PEMFC). The relationships between the effective and anisotropic transport properties and porosity of the two GDLs are determined using a pore scale model. The anisotropic liquid water permeability and the relationship between saturation pressure and capillary pressure are determined using the Lattice-Boltzmann method. Neutron radiography is used to validate the fuel cell performance and liquid water distribution in the GDL. The results show that the Freudenberg GDL performs better than the Toray GDL, especially at high current densities.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Biochemistry & Molecular Biology
Heng Zhang, Xuanyu Shao, Zhigang Zhan, Mrittunjoy Sarker, Pang-Chieh Sui, Po-Ya Abel Chuang, Mu Pan
Summary: A stochastic numerical method was used to reconstruct the three-dimensional microstructure of an MPL and validate the model using experimental data. The relationship between effective transport properties and compression strain was obtained using Pore Scale Model (PSM), while the relationship between liquid water saturation and capillary pressure was solved by Lattice Boltzmann Method (LBM). The effective transport parameters obtained by PSM and LBM improved the accuracy of the fuel cell model calculation.
Article
Chemistry, Physical
Shirin Mehrazi, Mrittunjoy Sarker, Po-Ya Abel Chuang
Summary: Tuning up the transport properties of the microporous layer by incorporating non-spherical conductive additives can enhance the mass transport in a proton exchange membrane fuel cell. Two high aspect ratio additives, multiwall carbon nanotube and graphene nanoplatelet, were mixed with acetylene-black carbon to study their impact on ink and diffusion media properties. It was found that 20 wt.% of the additive loading was optimal and multiwall carbon nanotube showed the best fuel cell performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
