Article
Electrochemistry
Y. Chen, J. Zhao, S. Tai, D. Li, C. Cho, Z. Wang
Summary: The thermal properties of carbon fibers and PTFE affect the thermal performance of GDLs, while freeze-thaw thermal aging causes microstructural damage to aged GDLs and influences thermal conductivity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Mert Tas, Gulsah Elden
Summary: The effects of cell temperature and relative humidity on charge transport parameters are analyzed numerically in this study. The results show that the current densities increase with increasing temperature and humidity, reaching a maximum in the rib regions. The behaviors of electrolyte potentials are similar to the changes in temperature and humidity. The cathode electrical potentials do not change significantly with increasing temperature and humidity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Electrochemistry
Basudev Choudhury, Bharatkumar Suthar
Summary: Characterizing the through-plane inhomogeneity in porous media is important for understanding transport processes in batteries and fuel cells. This study extends the impedance-based approach to characterize the inhomogeneity of a porous electrode and provides analytical expressions and approximate solutions for impedance response. The applicability of this theory is demonstrated through an impedance-based experimental investigation of gas diffusion media.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
M. Prokop, P. Capek, M. Vesely, M. Paidar, K. Bouzek
Summary: This study developed and optimized an experimental approach for determining the conductivity and transfer properties of high-temperature PEM fuel cell (HT PEM FC), PBI-bonded catalyst layer. The electrical conductivity was determined using a combination of chronopotentiometry and a mathematical model on an uncompressed catalyst layer. Effective transport properties were determined using gas-diffusion electrode samples fixed in the Wicke-Kallenbach cell. The experimental results agreed very well with the quantities calculated from FIB-SEM tomography, indicating the validity of the theoretical data based on tomography. The results also confirmed that heat treatment of the catalyst layer improved its electrical conductivity.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Tatyana Reshetenko, Madeleine Odgaard, Guenter Randolf, Kenta K. Ohtaki, John P. Bradley, Barr Zulevi, Xiang Lyu, David A. Cullen, Charl J. Jafta, Alexey Serov, Andrei Kulikovsky
Summary: In this study, a cathodic catalysts layer (CCL) design was achieved using a catalyst coated membrane approach with Platinum Group Metal-free (PGM-free) electrocatalysts. Three different Fe-Mn-N-C compounds were synthesized and characterized, and their electrochemical properties were evaluated. It was found that the CCLs exhibited high proton conductivity and predominantly exhibited a 4e- oxygen reduction reaction mechanism.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Electrochemistry
M. Prokop, M. Vesely, P. Capek, M. Paidar, K. Bouzek
Summary: This study focuses on the microstructure of catalyst layers in a high-temperature gas diffusion electrode in a PEM fuel cell. The choice of binder and preparation history were found to have a significant impact on the 3D microstructures of the catalyst layers. The use of polybenzimidazole as a binder resulted in smooth surfaces, low porosity, and homogeneous distribution of Pt, although penetration of Pt into the microporous layer was observed. The obtained 3D microstructure served as an input for mathematical models to evaluate the transport properties of the catalyst layers, providing important information for mathematical modeling and optimization of high-temperature PEM fuel cells.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Pengtao Wang, Chao Cai, Jinting Tan, Mu Pan
Summary: The addition of CeO2 in the microporous layer improves the durability of proton exchange membrane fuel cells, reduces performance decay rate, does not increase internal resistance, and effectively alleviates the negative impact of Ce ions on proton conductivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Multidisciplinary Sciences
Ahyoun Lim, Hui-Yun Jeong, Youngjoon Lim, Jin Young Kim, Hee Young Park, Jong Hyun Jang, Yung-Eun Sung, Jong Min Kim, Hyun S. Park
Summary: This study presents a high-performance amphiphilic Ti PTL suitable for PEM-URFCs, with alternating hydrophobic and hydrophilic channels to achieve excellent performance in both FC and EC modes by changing the surface polarity. The results demonstrate a significant improvement in performance in both FC and EC modes with the amphiphilic PTL.
Review
Chemistry, Physical
Grigoria Athanasaki, Arunkumar Jayakumar, A. M. Kannan
Summary: This study investigates the Gas Diffusion Layer (GDL) in proton exchange membrane fuel cell (PEMFC) stacks, emphasizing its significant role in performance, durability, and dynamic characteristics. The manufacturing techniques of GDL are also reviewed. It is suggested that additive manufacturing can be a cost-effective and simple approach for GDL fabrication.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Wataru Yoshimune, Satoru Kato, Masahide Inagaki, Satoshi Yamaguchi
Summary: In this study, a straightforward experimental apparatus was developed to measure the gas diffusivity in gas diffusion layers, and a commercial carbon paper was used as a case study. The calculated diffusivity was consistent with previous research findings.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Jared Beshai, Thomas DiSorbo, Jacob Hutfles, Jacob Segil, Richard F. ff Weir, John Pellegrino
Summary: This study presents the key characteristics of implementing cellulose acetate (CA) coatings on carbon cloth used as a fuel diffusion layer in aqueous fuel-fed cells, and demonstrates their functionality. The results show that these coatings enhance aqueous solution permeation and adhesion properties, leading to a two-fold increase in maximum power generation in alkaline DGFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Bin Hu, Fu-Lu Chang, Lin-Yi Xiang, Guang-Jian He, Xian-Wu Cao, Xiao-Chun Yin
Summary: In this study, high-performance PVDF/graphite/MWCNTs composite BPs with segregated conductive network were prepared by structural design and compression molding. The addition of MWCNTs led to improved conductivity and the observation of segregated synergistic conductive networks in the composite BPs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Andrei Kulikovsky
Summary: A model for PEMFC cathode impedance is developed, and the transient response of catalyst layer proton conductivity to cell current density variation is analyzed. The results show that this transient conductivity leads to the formation of a low-frequency inductive loop in the Nyquist spectrum.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Andrea Basso Peressut, Saverio Latorrata, Paola Gallo Stampino, Giovanni Dotelli
Summary: This study presents a simple method for preparing self-assembling sulfonated graphene oxide membranes, investigating the effect of different sulfuric acid-to-graphene oxide ratios to find an optimal sulfonation interval. The membranes exhibit notable water-retaining and proton-exchanging properties, making them worthy of further optimization for potential use as electrolytes in PEM fuel cells.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Amani Al-Othman, Paul Nancarrow, Muhammad Tawalbeh, Ahmad Ka'ki, Karim El-Ahwal, Bassam El Taher, Malek Alkasrawi
Summary: The synthesized composite membrane exhibits high proton conductivity at elevated temperatures, making it a promising candidate for use in PEM fuel cells. The composite membranes have the potential for stable proton conductivity and may be suitable for application in high-temperature PEM fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
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)