Article
Chemistry, Inorganic & Nuclear
A. J. Green, E. H. Driscoll, Y. Lakhdar, E. Kendrick, P. R. Slater
Summary: This article reports the discovery and characterization of a new niobate system with good electrochemical performance and long-term stability. The material shows good capacity and retention at high current densities. The study also highlights the challenges associated with initial irreversible capacity loss due to reducible cations.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
A. J. Green, E. H. Driscoll, Y. Lakhdar, E. Kendrick, P. R. Slater
Summary: This study reports the synthesis and electrochemical characterization of a new Wadsley Roth niobate system, Nb7Ti1.5Mo1.5O25, which shows good performance in terms of high current densities and long-term stability. Additionally, a Ta analogue, Ta7Ti1.5Mo1.5O25, with similar capacity retention to the Nb analogue, was also synthesized and characterized. Overall, this research highlights the challenges associated with reducing initial irreversible capacity loss in tetrahedral structures containing reducible cations.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Hyunwoo Kim, Woosung Choi, Jaesang Yoon, Eunkang Lee, Won-Sub Yoon
Summary: The study synthesized four different MnO2 polymorphs with controlled morphology to investigate their influences in conversion-based materials. Experimental results showed that spinel-phased MnO2 was formed during charge storage reactions for all samples, but the electrochemical performance varied based on the initial crystal structure. Among the polymorphs, lambda-MnO2 exhibited the highest reversible capacity of around 1270 mAh g(-1) due to its faster kinetics and structural similarity between cycled and pristine states. These findings suggest that polymorphs are an important factor in designing high-performance materials for next-generation rechargeable batteries.
Article
Materials Science, Ceramics
Kwang Joo Kim, Jongho Park
Summary: The advantages of Cr substitution in LiMn2O4 cathode for rechargeable battery were investigated. LiCrxMn2-xO4 thin films were deposited via sol-gel process and found to have spinel structure with no detectable secondary phase. The Cr ions were trivalent and occupied the octahedral sites of the spinel lattice. The Cr-substituted specimens exhibited a new phonon mode and showed better capacity retention in charge-discharge cycling tests.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Electrochemistry
Junichi Inamoto, Koki Aga, Akane Inoo, Yoshiaki Matsuo
Summary: In this study, the kinetic properties of sodium-ion intercalation in graphene-like graphite (GLG) were investigated using electrochemical impedance spectroscopy. The results showed that the interfacial sodium-ion transfer activation energies of GLGs were similar to graphite and lower than hard carbon, indicating better intercalation kinetics in GLG. The diffusion coefficient of sodium ions in GLG was similar to graphite, and the GLG800 heat-treated at 800°C exhibited the highest diffusion coefficient and reversible capacity, suggesting the best electrochemical properties among the GLGs studied.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Aleksandra Bednarz, Steffan Moller Sonderskov, Mingdong Dong, Victoria Birkedal
Summary: By manipulating ion concentrations, the structural features of DNA origami constructs can be controlled, expanding their potential for custom-specific applications.
Article
Nanoscience & Nanotechnology
Andrew Dopilka, Amanda Childs, Alexander Ovchinnikov, Ran Zhao, Svilen Bobev, Xihong Peng, Candace K. Chan
Summary: Clathrates of the tetrel elements can undergo Li alloying reactions with high capacities, with structural changes during lithiation leading to the formation of Li-rich amorphous phases and improved cycling performance compared to beta-Sn. Density functional theory calculations suggest that topotactic Li insertion is not favorable in clathrates, leading to the formation of the amorphous phase. The unique cage structure of clathrates may kinetically prevent the formation of crystalline Li-Sn or Li-Ga phases, resulting in better cycling and lower reaction voltages.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ding Shen, Yaohan Liu, MingYue Li, Wen Sun, ShuWei Tang, Wei Dong, ShaoBin Yang
Summary: First-principles calculations based on density functional theory were used to investigate the structural stability and lithium storage properties of tin clusters deposited on a graphene substrate. The results showed that the number of clusters and the binding between graphene and clusters are important factors affecting the system's stability. Additionally, lithium atoms are preferentially stored on graphene and adsorbed around the clusters.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Electrochemistry
M. M. Almeida, A. A. Mas, T. M. Silva, M. F. Montemor
Summary: High power pseudocapacitors play a crucial role in meeting specific needs in the current energy transition arena and implementing an efficient renewable energy society, but there are still open gaps in improving their energy density, conversion efficiency, cost, and cycle life. Electrodes based on active transition metal compounds show high potential in achieving these objectives, with the synthesis route playing a role in the charge storage mechanism.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Chemical
Seon Yeop Jung, Hwajoo Joo, Ji Hee Kim, Seoni Kim, Seongmin Heo, Jeyong Yoon
Summary: This study systematically investigated the effects of electrode design parameters on the performance of ELR system, finding that the effective radius of LMO particles is the most important parameter.
Article
Energy & Fuels
Hao Shen, Yucheng Zhu, Zhixiang Chen, Min Hua, Xuhai Pan, Hao Ji, Yilin Zhao, Juncheng Jiang
Summary: A porous carbon matrix composite (MoC@Cu@C) was synthesized by pyrolyzing a compound of a copper-based metal organic framework material and a molybdenum-based polyoxometalate under nitrogen atmosphere. The composite material, consisting of a mesoporous molybdenum carbide octahedron with small nanocrystals, offers more active Li+ storage sites due to its porous nature and carbon-rich matrix. In-situ synthesis of copper enhances conductivity and initial lithium deposition kinetics, while heteroatom N doping in organic ligands provides additional capacity. The MoC@Cu@C anode exhibits excellent rate and cycling performance in lithium-ion batteries.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Haifeng Li, Indrani Roy, Mateusz Starczewski, John Freeland, Jordi Cabana
Summary: A combination of oxygen redox and Mn-based oxides is considered the best option for high-energy-density Li-ion batteries, and the disordered rock-salt Li4Mn2O5 has shown promising capacity and reversibility. In this study, the charge compensation mechanism was investigated through Mn/OK-edge X-ray absorption spectroscopy (XAS). The results provide direct evidence of Mn redox participation during charging and highlight the role of a disordered structure in maintaining reversible redox chemistry for high-energy density cathode materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Peng Gao, Ying Zeng, Pei Tang, Zixing Wang, Jiaofeng Yang, Aiping Hu, Jilei Liu
Summary: A novel Co3O4/Co(OH)(2) heterostructure was obtained via electrodeposition on nickel foam, with a sandwich-like structure and a freestanding electrode. The presence of a conductive and robust interfacial Co3O4 layer effectively minimized charge transfer resistance and stabilized the interface, improving the electrode's rate and cycling performance. Structural evolution of Co(OH)(2) and Co3O4 upon cycling was systematically elucidated, showing irreversibly changing of Co(OH)(2) to CoOOH and negligible phase changes of Co3O4, indicating good structural integrity contributing to significantly improved cyclability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Guang-Li Zhang, Chao-Feng Pan, Yan-Hui Sun, Jing-Lan Wei, Dong-Cai Guan, Jun-Min Nan
Summary: The study successfully improved the electrochemical performance of the anode for lithium-ion batteries by using ZnO/SnFe2O4/nitrogen-doped carbon composites, which showed high initial coulombic efficiency and cycling stability, as well as excellent rate performance and cycling capacity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Daniela Alburquenque, Javiera Vargas, Federico Tasca, Cesar Zuniga Loyola, Loreto Troncoso, Patricia Rivas, Judit Lisoni, Juan Escrig
Summary: In this study, different oxides were synthesized using ultrasound-assisted thermal decomposition of nitrates (UA-TDN) method and characterized for their structure and properties. The results showed that increasing iron content had a positive effect on the oxide performance, with LFZMO 0.75-0.25 exhibiting higher discharge capacity and cycling performance. Furthermore, LFZMO 0.75-0.25 had a higher diffusion coefficient for lithium ions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
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)