Article
Electrochemistry
K. A. Yasakau, M. Starykevich, M. G. S. Ferreira, M. L. Zheludkevich
Summary: Proper assignment of time constants is crucial for interpreting impedance spectra accurately. Hierarchical models with R-C elements were used to describe the properties of sol-gel coatings, aluminium oxide layers, and corrosion processes in coated aluminium samples. The results provided valuable insights into the adhesion behavior of sol-gel coatings and proposed a degradation model for anodized aluminium.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
S. U. Costilla-Aguilar, M. J. Escudero, R. F. Cienfuegos-Pelaes, J. A. Aguilar-Martinez
Summary: Double perovskite La1.8Sr0.2CoFeO5+delta (DP-LSCF) exhibits excellent chemical compatibility and physical-chemical properties, making it a promising cathode material for intermediate temperature solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Gjorgji Nusev, Bertrand Morel, Julie Mougin, Dani Juricic, Pavle Boskoski
Summary: This study investigates the internal condition of a 6-cell solid oxide fuel cell stack during a 3600-hour test with short fuel starvation intervals, analyzing the relationship between condition changes, impedance spectra, and equivalent circuit model parameters. Features indicating reduced fuel supply are identified.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Zewei Lyu, Hangyue Li, Minfang Han, Zaihong Sun, Kaihua Sun
Summary: The commercial application of solid oxide fuel cells (SOFCs) is facing the challenge of limited lifetime and durability. This study establishes a quantitative evaluation method based on dynamic electrochemical impedance spectroscopy (DEIS) to understand the performance degradation mechanisms. The contributions of ohmic resistance and different polarization resistances are determined separately, and post-test characterization on electrode microstructures is provided to support the impedance-based analysis results.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Zhixiang Lian, Feng Chen, Xingbao Song, Dongliang Liao, Kaiping Peng
Summary: In this study, LSZG electrolyte materials were successfully synthesized using the sol-gel method, with smaller particle size and enhanced sintering properties compared to solid-state materials. The LSZG-SG electrolyte showed higher proton conductivity in a humid H+ environment and the addition of a barrier layer inhibited lithium-ion conduction. Solid oxide fuel cells based on LSZG-SG electrolyte demonstrated an open-circuit voltage of 1.0 V and a maximum power density of 17 mW cm(-2) at 600 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
S. U. Costilla-Aguilar, M. Pech-Canul, M. J. Escudero, R. F. Cienfuegos-Pelaes, J. A. Aguilar-Martinez
Summary: The study investigated the effect of complexing agent/transition metal ratio on GDC powders, revealing that higher temperatures and R ratios led to larger grain sizes, with GDC-R1 showing a larger specific surface area. The GDC-R1 sample sintered at lower temperatures exhibited the lowest average grain size and the highest ionic conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Sung Soo Shin, Jeong Hun Kim, Hyeseong Jeong, Mi Young Park, Kyung Joong Yoon, Ji-Won Son, Mansoo Choi, Hyoungchul Kim
Summary: The article introduces a novel two-step precursor infiltration process for fabricating high-performance LT-SOFCs with homogeneous and robust nanocatalysts. The infiltration technique reduces cathodic polarization resistance and achieves an enhanced peak power density in LT-SOFC technology.
Article
Chemistry, Inorganic & Nuclear
Erman Eloge Nzaba Madila, Yasmine Benabed, Prabhjyot Kaur, Steeve Rousselot, Mickael Dolle, Adam Duong
Summary: A new polycrystalline material Na3Co7(PO4)(6) has been synthesized using solid-state (ST) and sol-gel (SG) methods. The structure was determined to be monoclinic with a P21/c space group using powder X-ray diffraction (XRD). The scanning electron micrographs showed particle aggregates with sizes ranging from 8 to 35 μm for Na3Co7(PO4)(6)-ST and 1 to 20 μm for Na3Co7(PO4)(6)-SG. Energy-dispersive X-ray Spectroscopy (EDS) confirmed the presence of Na, Co, P, O elements and their homogeneous distribution. X-ray photoelectron spectroscopy (XPS) revealed the oxidation states of Na(I), Co(II/III), P(V), and O(-II). The optical bandgaps were estimated to be 1.79 eV for Na3Co7(PO4)(6)-ST and 1.78 eV for Na3Co7(PO4)(6)-SG based on UV-Vis diffuse reflectance spectra. The ionic conductivity was found to be 3.7 x 10(-4) S/cm at 300 °C and 6.53 x 10(-2) S/cm at 450 °C for both samples.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Energy & Fuels
Hazrul Adzfar Shabri, Siti Norlaila Faeizah Mohd Rudin, Mohd Hafiz Dzarfan Othman, Siti Munira Jamil, Siti Nur Elida Aqmar Mohd Kamal, Suriani Abu Bakar, Nafisah Osman, Juhana Jaafar, Mukhlis A. Rahman, Ahmad Fauzi Ismail
Summary: Adding a copper metal layer on top of the anode of micro-tubular SOFC can significantly enhance conductivity by 10^10 times, while also reducing gas permeability by 10 times. The optimal Cu solution composition was found to be a 2:1:8 ratio of Cu: citric acid: ethylene glycol, with stability in metal layer thickness after 5 deposition cycles. Increasing micron-sized pore formers during anode fabrication can help alleviate the reduction in gas permeability caused by the copper coating.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Masashi Kishimoto, Shohei Kishida, Haewon Seo, Hiroshi Iwai, Hideo Yoshida
Summary: A novel numerical methodology is proposed for predicting the electrochemical characteristics of a practical-size solid oxide fuel cell (SOFC). The method involves dividing the cell into independent one-dimensional unit cells and evaluating the cell's performance based on the performance of local unit cells. By constructing a database of unit cell performance and using theoretical expressions, the method accurately predicts the macroscopic characteristics of the entire cell.
Article
Energy & Fuels
Arianna Baldinelli, Antunes Staffolani, Gianni Bidini, Linda Barelli, Francesco Nobili
Summary: Solid Oxide Cells are efficient energy conversion systems, but unfavorable operating conditions can cause performance drop, especially in reversible and inversion cycles. Advanced data processing and equivalent circuit modeling can help diagnose aging mechanisms and build a real-time diagnostic tool for fuel cell operation.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Materials Science, Multidisciplinary
Raphael D. C. Balboni, Camila M. Cholant, Luana U. Kruger, Elton A. Moura, Guilherme K. Maron, Wladimir H. Flores, André Gundel, Darci A. Gatto, Agnieszka Pawlicka, Cesar A. O. Avellaneda, Robson Andreazza
Summary: Thin films of cerium dioxide and cerium dioxide doped with vanadium pentoxide were prepared as smart materials using a sol-gel route and spin coating deposition. Weathering processes and temperature effects were studied, showing that doping reduced degradation, increased resistance of the film with temperature, and enhanced charge insertion capacity at higher temperatures.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Yihui Liu, Zhuofei Pan, Xiaofei Zhao, Shaohua Zhong, Xiyong Chen, Chao Wang
Summary: The effects of PBCO impregnation on the electrochemical performance of LSCF cathodes were investigated, showing that an appropriate amount of impregnation significantly improves performance while excessive impregnation has a negative impact. Various experimental methods confirmed the impact of PBCO impregnation on the low-frequency region of the composite electrode, ultimately improving the oxygen vacancy concentration and oxygen adsorption capacity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Caterina Sanna, Wenjing Zhang, Paola Costamagna, Peter Holtappels
Summary: The study reports the synthesis and electrochemical characterization of composite cathodes made from a mixture of LSCF and GDC nanofibers. The electrodes showed low polarization resistance at 650 degrees C, indicating promising potential for practical applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Priyakant Pushkar, Arvind Kumar Mungray
Summary: The study showed that sediment height, anode size, and chamber volume can impact the diffusion impedance and power density in benthic microbial fuel cells (BMFCs), suggesting practical implications for improving energy generation efficiency. Microbial consortia were found to play a crucial role in mass transport phenomena and electrochemical diffusion in BMFCs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(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)