Article
Energy & Fuels
Shuxin Zhou, Huailin Fan, Fei He, Zhaobing Fu, Guoming Gao, Shu Zhang, Xun Hu
Summary: Metal selenides are important electrode materials in electrochemical energy storage and show comparable or even superior performance compared to metal oxides. The role of selenium in metal selenide electrodes in pseudocapacitance is still unclear. This study synthesized and evaluated NiO/NiCo2O4/CoO and NiCoSe2 spheres in an electrochemical system, and found that the participation of selenium in pseudocapacitance reactions is through hydroxides rather than selenides. Selenium also promotes the transformation of the active phase and contributes to the excellent electrochemical performance. The asymmetric device with NiCoSe2 as the positive electrode exhibited superior energy density and stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Seung-Hyun Chun, Pranav K. Katkar, Supriya A. Patil, Jae Ho Jeon, Hong Ryeol Na, Navnath S. Padalkar, Sahng-Kyoon Jerng, Sunghun Lee
Summary: A binder-free nickel-manganese phosphate composite with a micropetal-like structure was successfully synthesized. The material exhibited high electrochemical properties and good cycling stability. It was further used in a flexible asymmetric solid-state supercapacitor, showing high energy density and desirable longevity.
Article
Chemistry, Analytical
Chunjiao Liu, Liping Sun, Qiang Li, Lihua Huo, Hui Zhao
Summary: The phase structure, direct current conductivity, oxygen mobility characteristics, and electrochemical properties of cobalt-based high-entropy perovskite oxides with different alkaline earth metal contents were studied in this paper. It was found that by continuously substituting rare earth elements with alkaline earth elements in high-entropy materials, the content of oxygen vacancies increased and the electrochemical performance was enhanced. The high-entropy oxide La0.2Pr0.2Ba0.2Sr0.2Ca0.2CoO3 exhibited a chemical oxygen diffusion coefficient (Dchem) of 2.8 x 10-6 cm2 s-1 and a surface exchange coefficient (Kchem) of 9.1 x 10-3 cm s-1 at 700 degrees C. The anode-supported fuel cell using this high-entropy oxide achieved a peak power density of 792 mW cm-2 at 700 degrees C, showing excellent long-term stability and CO2 resistance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Ewelina Urbanczyk, Marta Wala, Agata Blacha-Grzechnik, Agnieszka Stolarczyk, Artur Maciej, Wojciech Simka
Summary: This study presents a simple method for preparing electrocatalytic materials for methanol oxidation, utilizing a composite of nickel, cobalt, and graphene. Electrodes prepared through an electrochemical deposition process exhibited stable performance and optimal results were achieved with a specific current density, showing promising catalytic properties for methanol electrooxidation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Jie Dong, Cuncai Lv, Mark G. Humphrey, Chi Zhang, Zhipeng Huang
Summary: A cobalt carbonate hydroxide core-shell nanowire was synthesized on carbon fiber paper through a wet-chemistry method for the hydrogen evolution reaction (HER) in water splitting. The CoCH@Co-MOF nanowire exhibited excellent catalytic activity with small overpotential, small Tafel slope, and large exchange current density. The one-dimensional morphology facilitated charge conduction, and the amorphous MOF framework endowed the nanowire with efficient catalytic activities.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Pasinee Panith, Pichitchai Butnoi, Varol Intasanta
Summary: This study introduces a novel hybrid faradaic structure to improve the performance of biomass-derived carbon-based supercapacitors (SCs). By carefully designing the organic-inorganic hybrid composition, nanostructures, porosity, surface area, and active redox reactions, pure lignin carbon nanofibers (LCNFs) incorporated with flower-like, multi-metal, and intrinsically capacitive nanoparticles were fabricated as flexible and binder-free electrodes for SCs. The experimental results demonstrate that the specific capacitance of the SCs can be significantly increased and the cycling stability can be improved by adding nanoparticles and using a mixed electrolyte.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
T. L. Simonenko, N. P. Simonenko, E. P. Simonenko, N. T. Kuznetsov
Summary: The features of the glycol-citrate synthesis process for highly dispersed oxide La0.6Sr0.4Co0.2Fe0.8O3 - delta with varying concentrations of the oxidizing and reducing agents were studied. The results showed that the synthesis conditions could reduce the formation temperature of single-phase highly dispersed oxides, which are promising as cathode materials for medium-temperature solid oxide fuel cells.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiaoyin Zhang, Rijia Lin, Xiangmin Meng, Wei Li, Fushan Chen, Jingwei Hou
Summary: A study on the development of two-dimensional metal-organic framework (2D MOF) composite nanosheets for enhanced performance in alkaline hydrogen evolution reaction (HER) was reported. The nanosheets, consisting of ultrathin Ni-MOF with uniformly anchored FePc molecules, exhibited significantly increased current density, improved activity, and enhanced durability. The resulting nanosheet catalyst FePc@Ni-MOF demonstrated low overpotential and satisfactory long-term stability, outperforming pristine FePc, Ni-MOF, and a counterpart FePc@bulk-MOF.
INORGANIC CHEMISTRY
(2021)
Article
Engineering, Environmental
Feng Guo, Jingwei Li, Yibo Zhang, Xiangguang Yang
Summary: A strategy of surface control of spinel by atomic layer deposition (ALD) technology was developed to enhance the water vapor tolerance of Pd/La-NiCo2O4 nanoboxes (NBs). The ALD-modification of lanthanum on the surface of NiCo2O4 NBs inhibited the accumulation of inactive hydroxyl groups/water, improving the Pd/La-NiCo2O4 NBs' water vapor tolerance at low temperatures. The embedding of Pd into the NiCo2O4 lattice significantly enhanced the catalyst activity of Pd/LaNiCo2O4 NBs for methane combustion at low temperatures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Rodrigo Henriquez, Alifhers S. Mestra-Acosta, Eduardo Munoz, Paula Grez, Elena Navarrete-Astorga, Enrique A. Dalchiele
Summary: A CdCO3/CdO/Co3O4 composite prepared through a specific method exhibited excellent performance in a supercapacitor, with high specific capacitance, energy density, and cycle life. Series-connected supercapacitors were able to power various electronic devices such as light-emitting diodes and electric mini-motors.
Article
Materials Science, Ceramics
Muhammad Yousaf, Muhammad Akbar, Enyi Hu, Yiwang Dong, Majid Niaz Akhtar, M. A. K. Yousaf Shah, Naveed Mushtaq, Yuzheng Lu, Sunlin Yan, Bin Zhu
Summary: Mixed ionic and electronic conduction in composite cathode enhances electrocatalytic functionalities for oxygen reduction reaction at low temperatures. A CoGd0.8Fe1.80O4 /Gd0.10Ce0.9O2-delta (CGFO-GDC) composite cathode demonstrates low electrode polarization resistance of 0.60 omega cm2 at 550 degrees C and peak power density of 611-343 mW cm-2 at 550-470 degrees C under fuel cell conditions. The introduction of ionic conducting GDC into CGFO sample improves catalytic functionalities and delivers a minimum electrode polarization resistance with enhanced power output at 550 degrees C.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Gyeongbin Ko, Seongdeock Jeong, Sanghyuk Park, Jimin Lee, Seoa Kim, Youngjun Shin, Wooseok Kim, Kyungjung Kwon
Summary: Lithium-ion batteries (LIBs) are crucial for the electric vehicle (EV) industry, and LiNi1-x-yCoxMnyO2 (NCM) is the dominant cathode material used in EV LIBs. Due to the need for increased driving range, Ni content in NCM is maximized, but the resulting Ni-rich NCM is unstable. Doping with foreign elements has been explored as a strategy to overcome this instability, with over 46 elements considered and their effects on LIB performance investigated in numerous research articles. This comprehensive analysis of various doping elements and their impact on LIB performance provides valuable insights for the LIB industry and academia.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Liang-Mei Xue, Song-Bo Li, Sheng-Li An, Ning Li, Hui-Pu Ma, Meng-Xin Li
Summary: This study investigates the implications of transition-metal Zn doping at the B-site on the crystal structure, average thermal expansion coefficient (TEC), electrocatalytic activity, and electrochemical performance of LaBaFe2O5+delta. The results show that Zn2+ doping does not change the crystal structure, but increases the unit cell volume and lattice expansion. With increasing doping amount, the oxygen vacancy concentration and Fe4+ content also increase. TEC decreases while conductivity reaches the highest value at x = 0.1. Zn2+ doping reduces polarization resistance and enhances electrochemical performance.
Article
Chemistry, Physical
A. A. Solovyev, A. V. Shipilova, S. V. Rabotkin, E. A. Smolyanskiy, A. N. Shmakov
Summary: This study investigates the influence of the LSC-GDC composite cathode interlayer on the operation of solid oxide fuel cells. It is shown that the composite layers with 50% GDC content possess the most efficient electrochemical activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Su Young Ryu, Michael R. Hoffmann
Summary: The alpha-NiO/Ni(OH)2/AgNP/F-graphene composite is studied as a potential battery material. The addition of AgNP/FG enhances the electrochemical redox reaction of alpha-NiO/Ni(OH)2, resulting in increased capacitance and capacity. Specifically, the specific capacitance is increased from 148 to 356 F g-1 with the addition of AgNP(20)/FG. The hybrid Zn-Ni/Ag/air electrochemical reactions of alpha-NiO/Ni(OH)2/AgNP(200)/FG and Zn-coupled electrodes show potential for a secondary battery, with a specific capacity of 1200 mA h g-1 and a specific energy of 660 W h kg-1.
Article
Chemistry, Physical
B. R. Sudireddy, P. Blennow, K. Agersted, K. V. Hansen, M. B. Mogensen
SOLID STATE IONICS
(2019)
Article
Electrochemistry
X. Sun, P. V. Hendriksen, M. B. Mogensen, M. Chen
Review
Chemistry, Physical
Mogens B. Mogensen
CURRENT OPINION IN ELECTROCHEMISTRY
(2020)
Review
Multidisciplinary Sciences
A. Hauch, R. Kungas, P. Blennow, A. B. Hansen, J. B. Hansen, B. V. Mathiesen, M. B. Mogensen
Article
Electrochemistry
Mogens B. Mogensen, Ming Chen, Henrik Lund Frandsen, Christopher Graves, Anne Hauch, Peter Vang Hendriksen, Torben Jacobsen, Soren Hojgaard Jensen, Theis Loye Skafte, Xiufu Sun
Summary: The degradation mechanism of Ni-YSZ electrodes in SOCs is complex and contradictory, characterized by loss of electrical contact between Ni particles and migration of Ni in the most active part. These issues are significant obstacles to the commercialization of SOC systems.
Article
Chemistry, Physical
Dordije Tripkovic, Jiayue Wang, Rainer Kungas, Mogens Bjerg Mogensen, Bilge Yildiz, Peter Vang Hendriksen
CHEMISTRY OF MATERIALS
(2022)
Review
Chemistry, Physical
Elena Marzia Sala, Nicola Mazzanti, Mogens Bjerg Mogensen, Christodoulos Chatzichristodoulou
Summary: This review article critically discusses the phenomena and mechanisms of CO2 electrochemical reduction over ceria surfaces, and explores the methods to accelerate the reaction steps by tuning ceria properties and defect chemistry. The article summarizes the impact of these factors on the energy landscape of the reaction and carbon deposition suppression, and proposes new directions for further research and optimization of ceria as a highly efficient catalyst.
SOLID STATE IONICS
(2022)
Article
Chemistry, Physical
Theis Loye Skafte, Omid Babaie Rizvandi, Anne Lyck Smitshuysen, Henrik Lund Frandsen, Jens Valdemar Thorvald Hogh, Anne Hauch, Soren Knudsen Kaer, Samuel Simon Araya, Christopher Graves, Mogens Bjerg Mogensen, Soren Hojgaard Jensen
Summary: A novel operation method is proposed to alleviate temperature variations and minimize degradation caused by impurities and nickel migration in SOEC technology. By rapidly switching between electrolysis mode and fuel cell mode, a flat thermal profile is obtained, enabling increased SOEC stack and module size and extended lifetime.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Bartlomiej Lemieszek, Justyna Ignaczak, Bartosz Kamecki, Jakub Karczewski, Mogens Bjerg Mogensen, Sebastian Molin, Piotr Jasinski
Summary: This article presents the electrolytic deposition of thin Rare Earth coatings on Crofer 22 APU stainless steel substrates for high temperature applications. The deposition of coatings based on yttrium, gadolinium, lanthanum, and cerium nitrates is discussed. The high temperature corrosion properties of surface-modified steels were examined using thermogravimetry and electrical resistivity measurements. The results showed that the use of RE element oxide layers reduced the growth of oxide scale, and coatings based on Y and Gd oxides exhibited the best corrosion protection properties. Electrical measurements showed that the surface-modified samples had lower resistance than the uncoated sample.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Elena Marzia Sala, Nicola Mazzanti, Francesco M. Chiabrera, Simone Sanna, Mogens B. Mogensen, Peter V. Hendriksen, Zhongtao Ma, Soren B. Simonsen, Christodoulos Chatzichristodoulou
Summary: Ceria (CeO2) shows great potential in reducing CO2 emissions and developing efficient and durable fuel electrodes for SOECs, due to its promising electrocatalytic properties and ability to tolerate impurities.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yousef Alizad Farzin, Mogens Bjerg Mogensen, Henrik Lund Frandsen
Summary: Ni migrates from cermet fuel electrodes in SOECs at high overpotentials, prompting interest in alternative electrode materials. Ni-free perovskites with mixed ionic and electronic conductivity are being developed as substitutes for Ni-YSZ- or Ni-CGO-cermet fuel electrodes. However, some perovskite electrodes exhibit poor electrocatalytic activity during steam electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Dordije Tripkovic, Rainer Kungas, Mogens Bjerg Mogensen, Peter Vang Hendriksen
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Review
Green & Sustainable Science & Technology
M. B. Mogensen, M. Chen, H. L. Frandsen, C. Graves, J. B. Hansen, K. Hansen, A. Hauch, T. Jacobsen, S. H. Jensen, T. L. Skafte, X. Sun
Article
Chemistry, Physical
Dordije Tripkovic, Rainer Kungas, Mogens Bjerg Mogensen, Peter Vang Hendriksen
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Article
Electrochemistry
Filippo Fenini, Kent Kammer Hansen, Mogens Bjerg Mogensen
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
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)