Article
Chemistry, Physical
Jiangtao Wu, Huijun Liu, Huanpeng Bu, Xue Zhang, Hailiang Zhang, Wenjun Wang, Lingxu Yang, Chaoliu Zeng, Shenglong Zhu
Summary: A series of manganese-based NASICON structured Na1+2xMnxTi2-x(PO4)3 materials were obtained by sol-gel method and demonstrated impressive electrochemical performances as cathodes for aqueous sodium ion batteries (ASIB). Among them, NM1.2T0.8P exhibited the best electrochemical performance with proper operating potential and high discharge specific capacity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Ping Hu, Ting Zhu, Congcong Cai, Bo Mai, Chen Yang, Jianmin Ma, Liang Zhou, Hong Jin Fan, Liqiang Mai
Summary: To enhance battery energy density and understand the charge storage mechanism, it is important to reduce non-active materials in electrodes. In this study, a free-standing Na4MnV(PO4)(3)@C fiber membrane was used as a sodium-ion battery cathode, showing reversible redox reactions and ion diffusion behavior. The assembled battery exhibited high energy density and good cyclability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
P. Lavela, R. Klee, J. L. Tirado
Summary: Several samples of the Na4-xMn1-xCrxV(PO4)3 series were prepared by a sol-gel method to improve electronic conductivity, and their structural, chemical, and morphological properties were analyzed. The partial replacement of Mn by Cr was found to enhance sodium diffusivity, leading to improved reversible extraction of sodium and low interface resistance.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Abdelwahed Chari, Karim El Ouardi, Marwa Tayoury, Mohamed Aqil, Brahim Orayech, Abdeslam El Bouari, Jones Alami, Mouad Dahbi
Summary: In this study, a Na3ZrCo(PO4)3 cathode material with high electrochemical performance was synthesized, providing guidance for enhancing the performance of sodium-ion batteries in the future.
JOURNAL OF POWER SOURCES
(2022)
Article
Polymer Science
Bing-Hsuan Hsu, Wei-Ren Liu
Summary: NASICON-type Na4MnCr(PO4)(3) (NMCP) wrapped with reduced graphene oxide (rGO) was synthesized as composite cathode material for Na ion batteries. The composite cathode showed stable capacity retention and rate capability, with improved electronic conductivity and structure stability attributed to the contribution of rGO coating.
Article
Chemistry, Physical
Nikita S. Buryak, Dmitrii Anishchenko, Eduard E. Levin, Sergey Ryazantsev, Vlad Martin-Diaconescu, Maxim Zakharkin, Victoria A. Nikitina, Evgeny Antipov
Summary: High-voltage extraction of sodium ions can increase specific energy but leads to capacity decrease and hysteresis. Electrochemical and structural analysis explain the degradation of Na4MnV(PO4)(3), which is mainly attributed to phase transformation and changes in the local environment.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Liying Shen, Yong Li, Swagata Roy, Xiuping Yin, Wenbo Liu, Shanshan Shi, Xuan Wang, Xuemin Yin, Jiujun Zhang, Yufeng Zhao
Summary: Na3V2(PO4)(3) is a promising electrode material for sodium-ion batteries, but faces limitations due to poor electronic conductivity. A two-step method was used to prepare carbon-coated Na3V2(PO4)(3) materials with remarkable electrochemical performance, surpassing most advanced cathode materials reported in literature.
CHINESE CHEMICAL LETTERS
(2021)
Article
Materials Science, Ceramics
Shufan Jia, Hirofumi Akamatsu, George Hasegawa, Saneyuki Ohno, Katsuro Hayashi
Summary: This study investigates the glass-ceramic processes to prepare NASICON-type NaxTi(2)(PO4)(3) as an anode candidate for sodium-ion batteries under different atmospheric conditions. The formation of NASICON-type NaTi2(PO4)(3) or Na3Ti2(PO4)(3) is observed depending on the inert or reducing atmosphere. The electrochemical properties and Na+ -storage capabilities of the glass-ceramic electrodes are correlated with the phase composition and fractions.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Bidhan Pandit, Morten Johansen, Bettina P. Andersen, Cynthia S. Martinez-Cisneros, Belen Levenfeld, Dorthe B. Ravnsbaek, Alejandro Varez
Summary: All-solid-state sodium-ion batteries with ceramic solid electrolytes and conductive carbon coated cathode material exhibit enhanced rate capability, stability, and long cycle life. The sequential Rietveld refinements of in situ data show the evolution of different phases and unit cell characteristics. The design of such batteries contributes to the fabrication of stable and efficient energy storage systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Chongran Song, Shiyu Li, Ying Bai
Summary: This study enhances the cyclic stability of sodium-ion batteries through surface modification and doping. The results show that the surface-modified NMVP exhibits higher capacity retention at high rates, which is attributed to the role of the surface modification layer as an ion transport carrier and physical barrier.
Article
Chemistry, Physical
Shufan Jia, Saneyuki Ohno, Jian Wang, George Hasegawa, Hirofumi Akamatsu, Katsuro Hayashi
Summary: By investigating the impacts of an electrode active material with a thickness of 1 μm on the performance of an oxide-based all-solid-state battery, this study presents a rapid method for evaluating electrode material compatibility and electrode design.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Jun Lee, Sohyun Park, Young Park, Jinju Song, Balaji Sambandam, Vinod Mathew, Jang-Yeon Hwang, Jaekook Kim
Summary: In this study, a Na3V1.6Cr0.4(PO4)(3)/C (NVCrP@C) cathode was designed for high power density sodium-ion batteries by implanting Cr into the crystal structure of NVP and coating it with carbon. The substitution of Cr in the structure significantly enhanced the electrode's structural stability, while the thin carbon layer improved electrical conductivity, leading to excellent cycling stability and power capability of the NVCrP@C cathode.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Ning Jiang, Cheng Yang, Xinyu Wang, Jiahe Liu, Yu Liu
Summary: This study presents the design of a Mn-based ternary NASICON-type material with multi-metal synergy, which overcomes the poor cycle performance of Mn-based NASICON materials.
ENERGY STORAGE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xin-Ran Qi, Yuan Liu, Lin-Lin Ma, Bao-Xiu Hou, Hong-Wei Zhang, Xiao-Hui Li, Ya-Shi Wang, Yi-Qing Hui, Ruo-Xun Wang, Chong-Yang Bai, Hao Liu, Jian-Jun Song, Xiao-Xian Zhao
Summary: This study successfully synthesized quasi-inverse opal structural NASICON/N-doped carbon for potential applications in sodium-ion batteries. The synthesized Q-NVP/N-C material exhibited good performance even at high current densities, demonstrating a high specific capacity.
Article
Chemistry, Physical
Jingrong Hou, Mohammed Hadouchi, Lijun Sui, Jie Liu, Mingxue Tang, Wang Hay Kan, Maxim Avdeev, Guiming Zhong, Yi-Kai Liao, Yu-Hong Lai, Ying-Hao Chu, Hong-Ji Lin, Chien-Te Chen, Zhiwei Hu, Yunhui Huang, Jiwei Ma
Summary: A novel sodium-deficient NASICON fluorinated phosphate cathode material for sodium ion batteries has been developed in this study, demonstrating high energy and high power densities as well as high sodium diffusion kinetics. Compared to traditional materials, this cathode shows improved performance including higher energy density, enhanced rate capability, and long cycling life. The findings open up promising prospects for high-performance sodium ion batteries by unlocking the potential of NASICON phosphate materials through fluorine substitution.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Maria G. Chernysheva, Ivan S. Chaschin, Gennadii A. Badun, Viktor G. Vasil'ev, Ivan V. Mikheev, Tianyi Shen, Maria A. Sinolits, Natalia P. Bakuleva
Summary: Nanodiamond adsorption coatings can enhance the mechanical properties of collagen tissue. Negatively charged nanodiamonds have a stronger impact on the mechanical characteristics. A graphene layer can prevent tissue calcification. Nanodiamond and chitosan films significantly enhance the mechanical properties of bovine pericardium.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Vasily Artemov, Alexander Ryzhov, Henni Ouerdane, Keith J. Stevenson
Summary: We conducted a comparative study of the conductivity data of weak and strong electrolytes and discovered previously unknown differences and similarities. By considering the neutralization of excess protons and proton holes in water, we developed a model that explains the conductivity of aqueous solutions. Our results suggest that the aggregation of species in weak electrolytes may be the main factor causing the difference in conductivity between weak and strong electrolytes. These findings advance our understanding of the dynamic structure of aqueous electrolyte solutions and have important implications for nanofluidic, biological, and electrochemical systems.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Ilia Kochetygov, Jocelyn Roth, Jordi Espin, Sophia Pache, Anita Justin, Till Schertenleib, Nazanin Taheri, Dmitry Chernyshov, Wendy L. Queen
Summary: In this work, a new strategy for ligand design is proposed, using piperazine and dihydrophenazine units as substitutes for benzene rings, via simple nucleophilic aromatic substitution reactions without using transition metal catalysts. 21 carboxylate-based ligands with varying sizes, shapes, and denticity and 15 linear di- and tetra-nitriles were successfully synthesized. Moreover, 16 structurally diverse MOFs with surface areas up to 3100 m(2) g(-1) were synthesized using these ligands as building blocks.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Anna S. Semenkova, Anna Yu. Romanchuk, Irina F. Seregina, Ivan Mikheev, Valentina S. Svitelman, Stepan N. Kalmykov
Summary: The present study investigated the sorption behavior of Eu(III) on kaolinite, focusing on two kaolinite samples with different origins and compositions. A high-purity natural sample of kaolinite was used to examine the dependence of sorption on ionic strength, pH, and radionuclide concentrations, and compared with another kaolinite sample containing admixtures of other clay minerals. The study also observed the effect of cations leaching from clay on the sorption. Based on experimental results, a thermodynamic sorption model of Eu(III) sorption onto kaolinite was developed, taking into account ion-exchange, surface complexation reaction, and competition with Al3+ sorption. The model was successfully tested on literature data for other kaolinite samples.
APPLIED CLAY SCIENCE
(2023)
Article
Materials Science, Ceramics
Polina A. Krokhicheva, Margarita A. Goldberg, Alexander S. Fomin, Dinara R. Khayrutdinova, Olga S. Antonova, Alexander S. Baikin, Anatoliy A. Konovalov, Aleksander V. Leonov, Ivan V. Mikheev, Ekaterina M. Merzlyak, Valentina A. Kirsanova, Irina K. Sviridova, Natalia S. Sergeeva, Sergey M. Barinov, Vladimir S. Komlev
Summary: This study aims to develop magnesium calcium phosphate bone cements (MCPCs) with antibacterial properties by incorporating silver ions. Increasing the silver ion concentration significantly improved the mechanical properties of the cements (compressive strength reached 41 +/- 2 MPa) and exhibited an 8 mm inhibition zone against Escherichia coli and Staphylococcus aureus in a disk diffusion test, without toxicity to MG-63 cells in vitro. Analysis of the MCPC samples soaked in Kokubo's simulated body fluid showed the formation of merrillite phase on the surface, transforming into bobierrite phase after 28 days of soaking. Histological examination and micro-CT analysis confirmed the osteoconductive and biodegradable nature of the newly developed MCPCs, making them suitable as bone substitutes.
CERAMICS INTERNATIONAL
(2023)
Article
Biochemistry & Molecular Biology
Mikhail A. Proskurnin, Elena V. Proskurnina, Viktoriya R. Galimova, Andrei V. Alekseev, Ivan V. Mikheev, Yuri A. Vladimirov
Summary: Thermal lens spectrometry and spectrophotometric titration were used to analyze the composition and solubility of the complex of oxidized cytochrome c with cardiolipin. Thermal lens spectrometry measured the solubility of the complex at nanomolar concentrations, while spectrophotometric titration assessed the soluble fraction of the complex at micromolar concentrations.
Article
Biochemistry & Molecular Biology
Daria-Maria V. Ratova, Ivan V. Mikheev, Grigoryi R. Chermashentsev, Konstantin I. Maslakov, Sergei Yu. Kottsov, Dmitrii N. Stolbov, Sergey V. Maksimov, Madina M. Sozarukova, Elena V. Proskurnina, Mikhail A. Proskurnin
Summary: This paper proposes a fast method for preparing aqueous graphene oxide dispersions by electrochemical oxidation of a graphite anode without preliminary intercalation with oxidizing agents. Ultrasonic probing in the modulation mode of ultrasonic waves (work/rest) was used for more efficient graphite oxidation-exfoliation. It is shown that the 4/2 s mode of ultrasonic modulation is the most effective in terms of probe material's low corrosion, maintaining optimum synthesis temperature, and achieving the best characteristics of the resulting product.
Article
Chemistry, Multidisciplinary
Vladislav R. Khabibullin, Liliya O. Usoltseva, Ivan V. Mikheev, Mikhail A. Proskurnin
Summary: The growing interest in heat-conducting nanofluids requires highly sensitive methods for analyzing the thermal properties. Thermal lens spectrometry (TLS) lacks a general approach for measuring and interpreting results for dispersed systems. This study justifies the selection of measurement parameters for nanofluids of silicon oxide in water and substantiates the interpretation of thermal diffusivity measurements. It is possible to detect and distinguish thermal effects with high accuracy using the TLS approach.
Article
Chemistry, Multidisciplinary
Andrzej Grzechnik, Vaclav Petricek, Dmitry Chernyshov, Charles McMonagle, Tobias Geise, Hend Shahed, Karen Friese
Summary: The structures and phase transitions in Rb2V3O8 and K2V3O8 mixed-valence vanadate fresnoites were studied using synchrotron single-crystal diffraction. The modulated structure of K2V3O8 was better described in (3 + 2)-dimensional space below 115 K. The modulation mainly involves rotations of VO4 and VO5 building units and slight variation of K-O distances. The high-brilliance synchrotron beam suppresses the incommensurate phase and the postulated phase transition in Rb2V3O8 was not observed.
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS
(2023)
Article
Chemistry, Physical
Huanyu Zhang, Giulia Paggiaro, Faruk Okur, Janis Huwiler, Claudia Cancellieri, Lars P. H. Jeurgens, Dmitry Chernyshov, Wouter van Beek, Maksym V. Kovalenko, Kostiantyn V. Kravchyk
Summary: The deployment of LLZO garnets as solid-state electrolytes for Li-metal solid-state batteries is hindered by the reactivity with water and carbon dioxide, leading to the formation of a contamination layer on the LLZO surface. High temperature annealing is studied as a thermal cleaning method, which effectively reduces the contamination but also results in the formation of a different phase on the LLZO surface. The impact of these factors on the performance of Li/LLZO/Li symmetrical cells was evaluated.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ivan V. Mikheev, Viktor A. Verkhovskii, Sofiya M. Byvsheva, Dmitry S. Volkov, Mikhail A. Proskurnin, Vladimir K. Ivanov
Summary: Excitation-emission matrix (EEM) fluorescence spectroscopy was used to quantify unmodified fullerenes C-60 and C-70 in different solvents at room temperature. The fluorescence intensity and parameters depend on the fullerene and solvent, allowing for quantification of mixtures without separation. The method was successfully applied to model and real mixtures of C-60 and C-70, with detection limits of 7 nmol/L and 2 nmol/L, respectively.
Article
Chemistry, Multidisciplinary
Julian Felix Baumgaertner, Michael Woerle, Christoph P. Guntlin, Frank Krumeich, Sebastian Siegrist, Valentina Vogt, Dragos C. Stoian, Dmitry Chernyshov, Wouter van Beek, Kostiantyn V. Kravchyk, Maksym V. Kovalenko
Summary: Pyrochlore-type iron (III) hydroxy fluorides (Pyr-IHF) are attractive as low-cost stationary energy storage materials due to their stable supply of constituent elements, high energy densities, and fast Li-ion diffusion. However, their commercial use is currently hindered by the high costs of synthesis and cathode architecture. In this study, a facile and cost-effective dissolution-precipitation synthesis method for Pyr-IHF from soluble iron (III) fluoride precursors is presented. The synthesized Pyr-IHF demonstrates high capacity retention of >80% after 600 cycles at a high current density of 1 A g(-1) without complex electrode engineering. Operando synchrotron X-ray diffraction is used to guide the selective synthesis of Pyr-IHF and investigate the effect of different water contents on rate capability. Li-ion diffusion is found to occur in the 3D hexagonal channels of Pyr-IHF formed by corner-sharing FeF6-x(OH)(x) octahedra.
ADVANCED MATERIALS
(2023)
Article
Thermodynamics
Ekaterina Belova, Julia D. Shakirova, Konstantin A. Lyssenko, Ivan Mikheev, Alexey S. Maliutin, Nikita A. Kovalenko, Irina A. Uspenskaya
Summary: Solid-liquid equilibria in the Ni(CH3SO3)(2)-H2O, Co(CH3SO3)(2)-H2O, and Mn(CH3SO3)(2)-H2O systems were investigated using isothermal solubility and DSC methods. TG and X-Ray diffraction were employed to identify solid phases in equilibrium with the solution. The vapor pressure of water was determined at different temperatures in the Ni(CH3SO3)(2)-H2O, Co(CH3SO3)(2)-H2O, and Mn(CH3SO3)(2)-H2O systems. Parameters of the Pitzer-Simonson-Clegg model were obtained based on vapor-liquid (VLE) and solid-liquid (SLE) equilibria data. The stability parameters of hydrates in these systems were estimated and binary phase diagram fragments were calculated.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2023)
Article
Chemistry, Physical
Svetlana Melnik, Alexander Ryzhov, Alexei Kiselev, Aleksandra Radenovic, Tanja Weil, Keith J. Stevenson, Vasily G. Artemov
Summary: The electrodynamics properties of nanoconfined water have been significantly changed compared to bulk water, providing opportunities for safe electrochemical systems. We present a nanofluidic water-only battery that exploits the unusually high electrolytic properties of pure water under strict confinement. The device, composed of carbon-based nanomaterials, creates interconnected nanochannels filled with water between the separator and electrodes. The efficiency of the battery shows a maximum energy density at 3 nm, challenging the current metal-ion batteries. Our findings establish the electrodynamic fundamentals of nanoconfined water and pave the way for low-cost and inherently safe energy storage solutions needed in the renewable energy sector.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Quentin Guesnay, Charles J. McMonagle, Dmitri Chernyshov, Waqas Zia, Alexander Wieczorek, Sebastian Siol, Michael Saliba, Christophe Ballif, Christian M. Wolff
Summary: High-vacuum, single-source thermal evaporation is an appealing deposition process for perovskite photovoltaics due to its promise of homogeneous and controlled growth of pure and uniform films. Mechanical synthesis of substoichiometric cesium bromide-lead iodide precursors and subsequent deposition and conversion processes were studied. The results show that no new phases were formed during ball-milling, and halide exchange between precursors occurs during the evaporation process. Furthermore, films with higher cesium bromide content exhibit more impurities, while optimized cesium bromide content leads to photovoltaic devices with 15% efficiency at an optical bandgap of 1.7 eV.
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)
