Article
Chemistry, Physical
Zi Jun Gao, Zhou Peng Li, Bin Hong Liu
Summary: In this study, La-incorporated Ni-B amorphous composites were synthesized and found to significantly improve the dehydrogenation kinetics of MgH2, showing higher structural and catalytic stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Environmental Sciences
Kanhaiya Chawla, Deepak Kumar Yadav, Abhinav Bajpai, Sushant Kumar, Chhagan Lal
Summary: This study investigates the improvement of hydrogen storage properties of MgH2 by using activated carbon as a catalyst in MgH2-AC nanocomposites. The results show that the presence of activated carbon helps reduce oxygen in MgO phase, leading to significantly enhanced absorption capacity and kinetics in the MgH2-AC nanocomposites. The nanocomposites also exhibit high hydrogenation properties with the presence of beta- and gamma-phases of MgH2, as supported by XRD data.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Shuhua Zhou, Wei Zhang, Wenfeng Wang, Yaokun Fu, Han Yu, Lu Zhang, Jianzheng Song, Ying Cheng, Shumin Han
Summary: A novel method involving cosintering of an organic material, pure Mg, and a hydriding combustion synthesis technique has been reported to prepare MgH2 with amorphous carbon, resulting in significantly improved dehydrogenation capacity and kinetics compared to pure MgH2.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Long Liang, Qingqing Yang, Shaolei Zhao, Limin Wang, Fei Liang
Summary: Rare-earth hydrogen storage alloy shows a catalytic effect in reducing the dehydrogenation temperature and improving the dehydrogenation kinetics of alane, providing a promising strategy for metal hydride modification.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Haoyuan Li, Qiang Fu, Hongyun Qin, Xia Chen, Qicheng Zhang, Hui Zhang, Shoudong Wang, Zixu Dong, Ming Wang
Summary: In this study, the controllable and continuous MgH2 hydrolysis was achieved by using an optimized porous filter element, which provides valuable reference for continuous MgH2 hydrolysis.
Article
Metallurgy & Metallurgical Engineering
Jian Zhang, Shuai Yan, Guanglin Xia, Xiaojie Zhou, Xianzheng Lu, Linping Yu, Xuebin Yu, Ping Peng
Summary: This study confirms that doping low-valence transition metals into MgO can weaken Mg-H bonds and reduce energy required for hydrogen desorption, resulting in superior catalytic activity compared to TMOs and MgO. The hybridization between Mg(Nb)O and MgH2 promotes charge transfer, enhancing hydrogen storage performance with reduced activation energy and increased reversible capacity.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
F. J. Antiqueira, D. R. Leiva, G. Zepon, W. J. Botta
Summary: In recent studies, it was found that high energy ball milling of Mg/MgH2 mixed with additives can reduce the temperature for H-2 absorption/desorption without altering thermodynamic properties. This research aimed to identify efficient hydrogen absorption/desorption catalysts at low temperatures, particularly at room temperature (RT). Among the additives tested in this study, MgH2-TiFe mixture showed the best performance, attributed to the strong catalytic action of TiFe and the high energy interfaces attracting hydrogen gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Long Liang, Chunmin Zhang, Shaolei Zhao, Baozhong Liu, Limin Wang, Fei Liang
Summary: Designing efficient catalysts is a crucial challenge for practical applications of high-capacity hydride in fuel-cell-based hydrogen economy. In this study, platinum-functionalized Ti3C2 material with an accordion-like structure, interlayer, and surface-dispersed nanoparticles was synthesized. The catalyst, Ti3C2@Pt, reduced the initial dehydrogenation temperature of high-density hydride AlH3 by 50% to 62 °C, comparable to commercial AlH3. Moreover, it exhibited high hydrogen supplying performance and retention ratio, achieving 9.3 wt% and 98% respectively, surpassing previously reported catalysts. The exceptional dehydrogenation performance of the material makes it a practical candidate for mobile device applications with the aid of high-efficiency catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Han Yu, Ying Cheng, Yaokun Fu, Lu Zhang, Sanyang Guo, Yuan Li, Wei Zhang, Shumin Han
Summary: In this study, a facile method was used to cover MgH2 with amorphous carbon formed in situ, resulting in the MgH2-CPF composite material. This material exhibited higher dehydrogenation rate and absorption capacity at lower temperatures, and the addition of carbon layer reduced the apparent activation energy of the reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Long Liang, Chunli Wang, Mingan Ren, Shouliang Li, Zhijian Wu, Limin Wang, Fei Liang
Summary: Introducing TiO2 and Pr6O11 for synergistic catalysis in the dehydrogenation process of AlH3 can lower the dehydrogenation temperature and increase the amount of released hydrogen. Multiple valence state conversions promote electron transfer and form a new dehydrogenation pathway.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Yongyang Zhu, Shaoyang Shen, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Zhenguo Huang, Min Zhu
Summary: This study reports an economical method to synthesize Mg(BH4)(2) by converting B-O bonds in widely available borates or boric acid to B-H. This method avoids expensive boron sources and high pressure and temperature conditions, significantly reducing costs, and could be an alternative to the current synthesis processes of Mg(BH4)(2).
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Dezhu Tan, Cong Peng, Qingan Zhang
Summary: In this study, a Mg-Ni-TiS2 composite was synthesized through a solution-based method, which showed improved hydrogen desorption kinetics due to the synergistic catalytic effect of Mg2NiH4, TiH2, and TiS2. The composite also exhibited high cycle stability. This work provides a feasible approach for the development of Mg-based hydrogen storage materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Cong Peng, Yongtao Li, Qingan Zhang
Summary: This paper proposes a new approach to improve the sorption kinetics of magnesium hydride by catalyzing it with highly dispersed nickel nanoparticles. The experiment demonstrates that the in-situ formation of highly dispersed Ni nanoparticles in the MgH2 matrix significantly enhances the hydrogen desorption kinetics and retention rate of MgH2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Shaolei Zhao, Long Liang, Baozhong Liu, Limin Wang, Fei Liang
Summary: The introduction of lithium nitride as a catalyst in aluminum hydride significantly reduces the dehydrogenation temperature and provides stable hydrogen capacity. Adjusting the mass fraction of lithium nitride enables the release of hydrogen at different temperatures.
Article
Chemistry, Physical
Long Liang, Shaolei Zhao, Chunli Wang, Dongming Yin, Shaohua Wang, Qingshuang Wang, Fei Liang, Shouliang Li, Limin Wang, Yong Cheng
Summary: In this study, a heterojunction synergistic catalyst of Ti3C2 supported PrF3 nanosheets was found to greatly enhance the dehydrogenation kinetics of AlH3 at low temperatures and maintain a high hydrogen storage capacity. Pr produced a synergistic coupling interaction through its unique electronic structure, and the sandwich structure enhanced the interaction between species and the synergistic effect. Under the kinetic test, the composite achieved an initial dehydrogenation temperature of 70.2 degrees C and a dehydrogenation capacity of 8.6 wt.% at 120 degrees C in 90 min, reaching 93% of the theoretical hydrogen storage capacity. The catalyst significantly reduced the activation energy of the dehydrogenation reaction. Furthermore, the multielectron pairs on the surface of the catalyst promoted electron transfer and accelerated the reaction.
Article
Materials Science, Ceramics
Zhirui Zhang, Haoyang Wu, Shutao Zhang, Yuelong Wang, Yiming Zhang, Chang Liu, Deyin Zhang, Baorui Jia, Dengshuai Guo, Aimin Chu, Xuanhui Qu, Mingli Qin
Summary: This study investigates the influence of oxygen impurities at different locations, such as lattice oxygen and grain edge oxygen, on the thermal resistivity of AlN ceramics. The results show that lattice oxygen is the main factor, and high-temperature annealing and pre-sintering can reduce the lattice oxygen content. The volume fraction of grain edge phase has little effect on thermal resistivity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Polymer Science
Alexander P. Kondratov, Anastasiya V. Lozitskaya, Vyacheslav N. Samokhin, Alex A. Volinsky
Summary: This study investigates the possibility of producing strain gauges with high sensitivity to mechanical stress using hard elastic films of isotactic polypropylene. The films exhibit thixotropic polymer softening during cyclic deformation (Patrikeev-Mullins effect) and the dry crazing effect. Three methods for preparing rigid elastic films using isotactic polypropylene are proposed, involving the deposition of an adhesive layer and an electrically conductive layer. The optimal manufacturing process for electrical sensors with high sensitivity is determined, including pre-cyclic deformation to form open micropores. A mathematical model is developed to predict the mechanical stress and/or the change in mechanical stress of the strain gauges based on the electrical resistance change in the conductive layer, with up to 700 relative strain sensitivity in the range of 6-35% strain.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Manufacturing
Ekaterina S. Marchenko, Yuri F. Yasenchuk, Oibek Mamazakirov, Anatoly A. Klopotov, Gulsharat A. Baigonakova, Alex A. Volinsky, Sergey V. Gunter
Summary: Porous NiTi alloys with improved mechanical properties were obtained by self-propagating high-temperature synthesis (SHS) method in a closed reactor, using layer-by-layer combustion under a protective argon atmosphere. The maximum compressive strain of the porous NiTi alloys synthesized in the closed reactor was 34%, compared to 7% in the open gas flow reactor. The reaction products in the two-phase gas zone of peritectic crystallization were isolated Ti2Ni crystalline clusters in the TiNi matrix, as confirmed by X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, energy dispersive spectroscopy, and optical microscopy.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Review
Materials Science, Multidisciplinary
Deye Xu, Meng Zhou, Yi Zhang, Shunlong Tang, Zhiyang Zhang, Yong Liu, Baohong Tian, Xu Li, Yanlin Jia, Alex A. Volinsky, De Li, Qiujie Liu
Summary: The effects of Y addition on microstructure evolution in Cu-Sn-Ni-Zn-Ti alloys during hot deformation were investigated. Hot deformation experiments were conducted using a Gleeble-1500 simulator, deforming Cu-Sn-Ni-Zn-Ti and Cu-Sn-Ni-Zn-Ti-Y alloys at temperatures ranging from 550 to 950 degrees C and strain rates of 0.001-10 s-1. Constitutive equations were constructed and the hot deformation activation energy of the two alloys was calculated. It was found that the addition of 0.1 wt% rare earth Y element can promote dynamic recrystallization based on analysis of true stress-strain curves and electron backscattered diffraction images. Pole figures showed a texture change from {011}(112) Brass texture and {001}(100) Cube texture to {111}(211) R texture after Y addition. The microstructure and precipitates of the Cu-Sn-Ni-Zn-Ti alloy were analyzed, revealing the presence of Cu4Ti precipitates. Continuous dynamic recrystallization and discontinuous dynamic recrystallization were identified as the main recrystallization mechanisms in the Cu-Sn-Ni-Zn-Ti alloy.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Qiuyu Shen, Yongchang Liu, Xudong Zhao, Junteng Jin, Xiaobai Song, Yao Wang, Xuanhui Qu, Lifang Jiao
Summary: Initiating anionic redox chemistry in layered sodium oxide cathodes is a prevalent method to break the capacity limit set by traditional transition metal redox. This study uncovers a Mn activation mechanism in a novel P2-Na0.80Li0.08Ni0.22Mn0.67O2 cathode, which achieves high discharge capacity and long cycling life by triggering anionic redox and reducing Mn through oxygen loss. The work elucidates the charge compensation mechanism and expands the horizons of oxygen redox chemistry for high-performance layered oxide cathode materials in sodium-ion batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiayan Jian, Qiuyu Shen, Xudong Zhao, Junteng Jin, Yao Wang, Shengwei Li, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: This study reports a new type of ultrathin VOPO4 nanosheets as cathodes for sodium-ion batteries, achieving higher capacity and rate performance through redox reactions and ClO4- insertion/extraction. The mechanism of anionic redox reactions is elucidated, opening up a new avenue for high-energy phosphate cathodes for SIBs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xu Chen, Shaowen Peng, Ye Liu, Song Bai, Lin Zhang, Shuang He, Oleg I. Gorbatov, Xuanhui Qu
Summary: Ductility deterioration induced by L21-Ni2AlTi precipitates in aged ferritic alloys was systematically examined using scanning transmission electron microscopy, mechanical tests, and first-principles thermodynamic calculations. Experimental studies showed that the presence of B2-NiAl and L21-Ni2AlTi precipitates in the alloy resulted in higher strength and hardness compared to the alloy with only NiAl precipitates, but a significant decrease in elongation-to-failure, indicating obvious ductility deterioration. Theoretical analysis revealed the intrinsic brittleness of L21-Ni2AlTi phase and L21-Ni2AlTi/BCC-Fe interface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zunyue Yu, Jianguo Huang, Chenglong Xiao, Wenru Zhao, Beibei Zhang, Shubin Ren, Xuanhui Qu
Summary: In this paper, a simple material preparation method is proposed to meet the requirements of efficient heat exchange interface materials for spacecraft on-orbit modular assembly. Carbon nanotubes (CNTs) were dispersed on the surface of spherical copper (Cu) powder, and then the bulk was obtained by hot-pressing sintering. By removing the Cu on the surface, the CNTs can protrude from the surface to fill the pores at the interface, increasing the heat transfer channel and reducing the thermal contact resistance (TCR).
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Yiming Zhang, Haoyang Wu, Zhirui Zhang, Tao Li, Huifeng Lu, Qing He, Yuelong Wang, Baorui Jia, Siyong Gu, Xuanhui Qu, Mingli Qin
Summary: This paper reported a low + high temperature two-step sintering method using ultrafine AlON powders to prepare high-strength and high-transmittance AlON ceramics. The method achieved a sample with 97% density and small grain size, and increasing the sintering temperature further eliminated the porosity and realized high optical transmission and flexural strength.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yadong Liu, Saipeng Cao, Haoyang Wu, Lin Zhang, Baorui Jia, Mingli Qin, Xuanhui Qu
Summary: Hollow spherical WO3 powder was successfully synthesized via spray solution combustion synthesis (SSCS) method using a mixed solution of ammonium metatungstate, glycine and ammonium nitrate. The effects of fuel ratio, temperature, and precursor solution concentration on the structure and morphology of the powder were investigated, as well as the SSCS mechanism. The optimized conditions resulted in the formation of smooth-surfaced spherical WO3 powder with a median diameter of 24.02 μm, consisting of nanoparticles with a diameter of about 30 nm and a specific surface area of 13.5 m2/g. The as-synthesized WO3 powder exhibited excellent catalytic performance in degrading RhB solution under visible light, with 70.1% degradation achieved within 2 hours using only 10 mg of powder.
CERAMICS INTERNATIONAL
(2023)
Review
Materials Science, Multidisciplinary
Hairui Xing, Ping Hu, Chaojun He, Xiangyang Zhang, Jiayu Han, Fan Yang, Run Bai, Wen Zhang, Kuaishe Wang, Alex A. Volinsky
Summary: This paper reviews the methods of strengthening molybdenum alloys with metal oxides and carbides and their effects on alloy structure and properties, providing guidance for the design of high-performance refractory molybdenum alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jin'e Sun, Yaojie Wen, Zhong Wang, Jingguo Zhang, Linshan Wang, Xuanhui Qu, Baicheng Zhang
Summary: In this study, a TiC nanoparticle modified Al-Mg-Li alloy is developed for laser powder bed fusion (LPBF) process. The presence of TiC nanoparticles effectively increases the viscosity of the alloy liquid, preventing Li element ablation and promoting grain refinement. The addition of TiC nanoparticles leads to an outstanding mechanical property with high ultimate tensile strength and elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yu Pan, Yucheng Yang, Qingjun Zhou, Xuanhui Qu, Peng Cao, Xin Lu
Summary: By adding a minor CaC2 oxygen-scavenger, the excessive interstitial oxygen contamination in titanium and its alloys can be effectively solved, resulting in high strength and superior ductility. This novel method offers a cost-effective way to develop high-performance titanium materials.
Article
Materials Science, Multidisciplinary
Shuyi Xie, Bin Xu, Cong Zhang, Dil Faraz Khan, Xue Jiang, Ruijie Zhang, Yongwei Wang, Haiqing Yin, Xuanhui Qu
Summary: This study investigates the effects of doping 7 refractory elements (V, Cr, Zr, Nb, Mo, Hf, and Ta) on the site preference, elastic properties, and bonding effect of Ni2TiAl. The results show that V and Cr can effectively improve the bonding stability and strength of Ni2TiAl.
COMPUTATIONAL MATERIALS SCIENCE
(2024)
Article
Materials Science, Multidisciplinary
Chang Liu, Jianxiong Liang, Changjun Wang, Gang Chen, Xuanhui Qu, Yu Liu, Zhenbao Liu, Mengxing Zhang
Summary: In this study, PH13-8Mo stainless steel parts doped with cerium were fabricated and compared with undoped parts. The doping of cerium improved the microstructure, phase constituents, and tensile properties of the stainless steel. The results showed that doping with cerium enhanced the mechanical stability of austenite, improved the sphericity of oxide inclusion, and increased the ultimate tensile strength and fracture elongation of the PH13-8Mo parts. The improved strength and ductility were attributed to the strengthening effects of nanoscale precipitation and grain refining, as well as the enhanced inclusion sphericity and coherency between the inclusion and matrix.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(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)
