Article
Electrochemistry
N. V. Lyskov, M. Z. Galin, K. S. Napol'skii, I. V. Roslyakov, G. N. Mazo
Summary: Through optimizing the composition ratio and forming porous GDC layer, the electrochemical activity in the oxygen reduction reaction can be improved. The multilayered structure electrode can decrease the polarization resistance and enhance the electrochemical activity in the oxygen reduction reaction.
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
(2021)
Article
Chemistry, Physical
Sajad Vafaeenezhad, Miguel A. Morales -Zapata, Amir Reza Hanifi, Miguel A. Laguna-Bercero, Partha Sarkar, Thomas H. Etsell
Summary: The electrochemical performance and stability of infiltrated praseodymium nickelate (PNO) as the cathode for solid oxide fuel cell (SOFC) applications was studied. The results showed that PNO infiltrated into gadolinium-doped ceria (GDC) scaffolds improved the oxygen reduction reaction and transformed into a phase with higher electrical conductivity and thermal stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Arefeh Kazzazi, Dominic Bresser, Matthias Kuenzel, Maral Hekmatfar, Johannes Schnaidt, Zenonas Jusys, Thomas Diemant, R. Juergen Behm, Mark Copley, Krzystof Maranski, James Cookson, Iratxe de Meatza, Peter Axmann, Margret Wohlfahrt-Mehrens, Stefano Passerini
Summary: The research addresses the insufficient stability of the electrolyte towards oxidation in high-voltage lithium-ion cathode materials, and introduces a new combination of electrolyte additives to improve battery performance. The synergistic effect of TTSPi and TFEC additives significantly enhances cycling stability, capacity, and coulombic efficiency in lithium-ion cells with a voltage higher than 4.5 V, which can be further improved with the addition of lithium bis(oxalato)borate.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Analytical
A. I. Kovrova, V. P. Gorelov
Summary: This paper reviews the research results obtained at the Institute of High Temperature Electrochemistry on the electrode reactions at the Pt|YSZ electrolyte interface during the impregnation of porous electrodes by rare-earth oxides and mixed oxides. The impregnation process involved the formation of oxide nanofilms at the electrolyte surface using nitrate solutions of rare-earth elements. The impact of submicron barrier Ce0.8R0.2O2-a films on the polarization resistance of the La2NiO4|YSZ boundary is studied, and a comprehensive review of available literature data is provided.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Bing Jiang, Jingru Li, Bi Luo, Qizhang Yan, Hao Li, Lehao Liu, Lihua Chu, Yingfeng Li, Qiaobao Zhang, Meicheng Li
Summary: Li-rich layered oxide cathodes have high operating potential and specific capacity, but suffer from structural instability and parasitic reactions at high potential. By adding LiPO2F2 electrolyte additive, the cycling stability of the Li1.14Ni0.133Co0.133Mn0.544O2 cathode is improved, leading to enhanced interfacial stability and mitigated interfacial side reactions. This study provides new insights for enhancing high-potential Li-rich layered oxide batteries.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Physical
Peng Cui, Chun Sun, Peng Lv, Feifei Shi, Wei Wei
Summary: The poor interface contact between the electrode and solid electrolyte is a major obstacle damaging the cycle performance of solid-state lithium-ion batteries. Adding an organic interfacial superionic conductor (ISC) based on polyether polyols (PPG) can enhance the ion-diffusion kinetics on the electrolyte/cathode interface and improve the rate capability. The assembled LFP cathode demonstrated a high specific capacity of -95.7 mAh/g with a retention of -92% after 1000 cycles at 10 C.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Jie Gao, Shuai Xu, Muhammad Akbar, Chen Xia, Wenjing Dong, Chongqing Liu, Yuanjing Meng, Menghui Yuan, Baoyuan Wang, Xunying Wang
Summary: This research introduces a single-layer solid oxide fuel cell based on semiconductor-ionic conductor composite material, demonstrating high performance stability and greater tolerance for temperature changes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Xing Zhao, Peng Wang, Yan Wang, Peipei Chao, Honglei Dong
Summary: The nanoscale 0.5Li(2)MnO(3).0.5Li(Ni0.44Mn0.44Co0.12)O-2 Li-manganese-rich electrode material was synthesized and its electrochemical properties, especially electrochemical impedance spectroscopy, were systematically analyzed. The failure of the electrode interface and structural transformation of the material at high potential are the main reasons for the deterioration. High temperatures accelerate the deterioration process. Based on the systematic analysis of induced reactance change with electrode polarization potential, it is found that the induced reactance of a Li-manganese-rich electrode is not only related to the degree of delithiation/lithiation, but also to the performance of the electrode/electrolyte interface. This conclusion provides a theoretical basis for guidance in the manufacturing of battery failure analysis.
Article
Chemistry, Physical
Mariya S. Shchelkanova, Georgyi Sh Shekhtman, Svetlana Pershina, Alexander A. Pankratov, Anna Khodimchuk, Victoria Pryakhina
Summary: In this study, sodium-vanadium oxide NaV3O8 was synthesized and characterized using various techniques. It showed good thermal stability, electronic conductivity, and cyclic performance in solid state cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Guanjie Li, Changyong Mo, Qinqin Cai, Zifei Li, Weishan Li, Youhao Liao
Summary: In this study, the failure mechanism of stored NCM811 cathode material was investigated from the perspective of electrolyte/electrode interfaces. The impurities generated on the NCM811 surface during storage were found to catalyze the oxidative decomposition of electrolytes, leading to fast capacity fading. However, the adverse effects of surface impurities can be eliminated by introducing a Lewis acid additive, which not only dissolves contaminants but also forms a stable electrode/electrolyte interphase film. This research provides insights into the degradation mechanism of nickel-rich materials and offers a viable strategy for self-repairing moderately degraded materials.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Zhu Cheng, Hui Pan, Fan Li, Chun Duan, Hang Liu, Hanyun Zhong, Chuanchao Sheng, Guangjin Hou, Ping He, Haoshen Zhou
Summary: By adopting a confined dissolution strategy, the authors demonstrate a rechargeable all-solid-state Li-I-2 battery with extended cycle life. The battery has attracted attention due to its high theoretical capacity, low cost, and environment-friendliness. A well-designed hybrid electrolyte promotes a new polyiodides chemistry and localizes the polyiodides dissolution, resulting in improved rechargeability.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Javier Zamudio-Garcia, Leire Caizan-Juanarena, Jose M. Porras-Vazquez, Enrique R. Losilla, David Marrero-Lopez
Summary: This study investigates the influence of different electrolytes on the electrochemical performance of LSCF nanostructured electrodes. The results show that the ionic conductivity of the electrolyte has a significant impact on the polarization resistance of LSCF. Additionally, the rate-limiting steps for the oxygen reduction reaction (ORR) remain the same regardless of the electrolyte used.
Article
Chemistry, Physical
Zhuo Li, Suting Weng, Jialong Fua, Xiaoxue Wang, Xiaoyan Zhou, Qinghua Zhang, Xuefeng Wang, Lu Wei, Xin Guo
Summary: A nonflammable quasi-solid electrolyte with high conductivity and wide electrochemical window is prepared. The electrolyte can capture solvents to form a protective layer on electrodes, suppressing side reactions and electrode dissolution.
ENERGY STORAGE MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Adam Wang, Doohwan Jung, Dongwon Lee, Hua Wang
Summary: This paper presents a systematic analysis of the interfacial electrochemical impedance spectroscopy of electrodes with different biocompatible materials. The study found that PEDOT:PSS-coated electrodes significantly reduce interfacial impedance at 1 kHz, making them promising candidates for bioelectrical interfaces with subcellular spatial resolution.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Jie Wang, Ling Wu, Lina Shen, Qun Zhou, Yuling Chen, Juan Wu, Yali Wen, Junwei Zheng
Summary: A new strategy of fabricating sulfur electrode by infusing sulfur into a conductive biochar decorated with CoO nanoparticles is developed. The loading of active CoO nanoparticles is increased efficiently by using microwave-assisted diffusion method. The biochar can activate sulfur effectively, while the CoO nanoparticles can alleviate the dissolution of polysulfides and enhance the conversion kinetics. The sulfur electrode with biochar and CoO nanoparticles exhibits excellent electrochemical performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
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, Physical
Ruslan R. Samigullin, Oleg A. Drozhzhin, Evgeny Antipov
Summary: The thermal stability of cathode and anode materials for Li-ion and Na-ion batteries was studied using differential scanning calorimetry and ex situ powder X-ray diffraction. The results showed that the thermal stability of Na-ion cathode materials increases in the order NFM < NVPF < NVP < NVPO. The heat on energy term was proposed and analyzed for all studied materials.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
S. Ya. Istomin, A. V. Morozov, N. V. Lyskov, S. M. Kazakov, E. V. Antipov
Summary: In this study, the high-temperature thermal expansion and electrical conductivity properties of cuprate materials were investigated, and their applicability as cathode materials for solid-oxide fuel cells was evaluated. The results showed that these materials exhibit certain thermal expansion and electrical conductivity at high temperatures, but their applicability is limited due to the trapping effect of ions on the main charge carriers.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Electrochemistry
M. M. Abdullaev, N. Lyskov, S. Ya Istomin, E. Antipov
Summary: The high-temperature electrical conductivity, electrochemical activity, and oxygen redox reaction of Sr2FeCo0.5Mo0.5O6-delta (SFCM) and Sr1.6La0.4FeCo0.5Mo0.5O6-delta (LSFCM) were studied at variable oxygen partial pressure. It was found that the replacement of Sr2+ with La3+ resulted in a decrease in total electrical conductivity due to a decrease in hole charge carrier concentration. The impedance spectra analysis revealed different rate-limiting steps in the oxygen redox reaction for SFCM and LSFCM, which were attributed to different oxygen vacancy concentrations in these materials.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ekaterina I. Orlova, Timofei A. Sorokin, Alexander M. Antipin, Elena P. Kharitonova, Nikolay V. Lyskov, Nataliya I. Sorokina, Valentina I. Voronkova
Summary: Cadmium-doped lanthanum and praseodymium oxymolybdates were synthesized and their crystal structures were analyzed. The results showed that cadmium ions replaced rare-earth atoms in the oxymolybdate structure, leading to linear expansion in the temperature range of 20-600 degrees C. The doped samples exhibited similar thermal expansion coefficients to standard solid-oxide fuel cell electrolytes. Cadmium heterovalent doping also increased the conductivity of the compound while reducing its hygroscopicity.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Nellie R. Khasanova, Rodion V. Panin, Ilia R. Cherkashchenko, Maxim V. Zakharkin, Daniil. A. Novichkov, Evgeny V. Antipov
Summary: The NASICON-type NaNbV(PO4)(3) electrode material synthesized by the Pechini sol-gel technique undergoes a reversible three-electron reaction in a Na-ion cell, providing a reversible capacity of 180 mAh·g(-1). The structural characterization reveals the reversible evolution of the NaNbV(PO4)(3) framework during cycling, and XANES measurements confirm the multielectron transfer during sodium intercalation/extraction. This electrode material demonstrates extended cycling stability and excellent rate capability, making it suitable for high-power and long-life sodium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Vitalii A. Shevchenko, Iana S. Glazkova, Daniil A. Novichkov, Irina Skvortsova, Alexey V. Sobolev, Artem M. Abakumov, Igor A. Presniakov, Oleg A. Drozhzhin, Evgeny V. Antipov
Summary: Sodium-ion batteries using O3-type NaNi1/3Fe1/3Mn1/3O2 layered oxide as positive electrodes have restricted electrochemical performance due to the voltage limit of 4.0 V. Further reduction of sodium content leads to capacity degradation. The study presents the redox transitions occurring during charge and discharge of O3-NaNi1/3Fe1/3Mn1/3O2.
CHEMISTRY OF MATERIALS
(2023)
Article
Energy & Fuels
Ruslan R. Samigullin, Maxim V. Zakharkin, Oleg A. Drozhzhin, Evgeny V. Antipov
Summary: The thermal stability of NASICON-type cathode materials for sodium-ion batteries was investigated using DSC and in situ HTPXRD. Analysis of Na3V2(PO4)(3) and Na4VMn(PO4)(3) showed that the Mn-substituted cathode material exhibited poorer thermal stability in the charged state, with amorphization of Na4VMn(PO4)(3)-based electrodes occurring at 150 to 250 degrees Celsius.
Article
Chemistry, Multidisciplinary
Aleksei V. Kubarkov, Alexander V. Babkin, Oleg A. Drozhzhin, Keith J. Stevenson, Evgeny V. Antipov, Vladimir G. Sergeyev
Summary: In this study, a combination of LiFePO4 active material with single-walled carbon nanotubes as conductive additive was used to develop high-energy-density cathodes for Li-ion batteries. The effect of different morphologies of the active material particles on the electrochemical characteristics of the cathodes was investigated. Spherical LiFePO4 microparticles provided higher packing density but had poorer contact with the current collector and lower rate capability compared to plate-shaped LiFePO4 nanoparticles.
Article
Energy & Fuels
Egor Baldin, Nikolay Lyskov, Galina Vorobieva, Igor Kolbanev, Olga Karyagina, Dmitry Stolbov, Valentina Voronkova, Anna Shlyakhtina
Summary: This study investigates the nanophases in the La2O3-MO3 (M = Mo, W) systems, which are known for their good oxygen-ion and proton conductivity. The mechanically activated La2O3 + MO3 mixtures and final ceramics were characterized using DSC, XRD, and SEM. The formation of hexagonal La15M8.5O48 (phase II, 5H polytype) nanophases was observed in both systems for the 1:1 composition. The nanocrystalline tungstates had a crystallite size of about 40 nm, while the nanocrystalline molybdates had a crystallite size of about 50 nm. The conductivity in dry and wet air was determined using impedance spectroscopy, and different phase transitions were observed at higher temperatures.
Article
Chemistry, Physical
A. V. Shlyakhtina, E. D. Baldin, G. A. Vorobieva, I. V. Kolbanev, D. N. Stolbov, A. V. Kasyanova, N. V. Lyskov
Summary: The search for new materials with high proton or oxygen-ion conductivities is crucial for the advancements in solid state ionic and electrochemistry fields. In this study, the structure, phase transitions, and ionic conductivity of various composites and solid solutions were investigated. The results showed that proton conductivity was observed in the La14-xNdxW4O33 solid solutions, while oxygen-ion conductivity was found in the Nd-containing gamma-La6W2O15-based composites. The phase transition and cracking behavior of these materials were also studied.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Ekaterina I. Orlova, Timofei A. Sorokin, Egor D. Baldin, Elena Yu Zakharova, Elena P. Kharitonova, Nikolay Lyskov, Vasiliy O. Yapaskurt, Valentina I. Voronkova
Summary: Fluorite-like compounds with the compositions Sm5Mo3O16 and LiSm4Mo3O15F were obtained for the first time by solid-phase synthesis in vacuum-sealed quartz ampoules. The resulting materials were characterized and it was found that LiSm4Mo3O15F samples have the same structure as cubic Sm5Mo3O16 compounds. The double replacement of samarium with lithium and oxygen with fluorine leads to a reversible phase transition and a jump in conductivity by 2 orders of magnitude. The LiSm4Mo3O15F compound exhibits a conductivity of 10-3 S/cm at 600 degrees C, which is about half an order of magnitude higher than non-fluorinated compounds.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Denis S. Lutsenko, Ekaterina V. Belova, Maxim V. Zakharkin, Oleg A. Drozhzhin, Evgeny V. Antipov
Summary: Sodium-ion batteries have the potential to replace lithium-ion and lead-acid batteries, and high efficiency in a wide temperature range is important. This article analyzes the phase equilibria and electrochemical properties of sodium-ion battery electrolytes based on different solvent mixtures. The electrolyte based on ethylene carbonate and diethyl carbonate shows excellent performance at low temperatures and could be a promising basis for the further development of low-temperature sodium-ion batteries.
CHEMISTRY-SWITZERLAND
(2023)
Article
Electrochemistry
A. V. Shlyakhtina, N. V. Lyskov, I. V. Kolbanev, G. A. Vorob'eva, A. N. Shchegolikhin, V. I. Voronkova
Summary: The hexagonal solid solution La2W1+xO6+3x (x≈0.11) and the orthorhombic low-temperature phase beta-La2WO6 (La2W1+xO6+3x (x=0)) were synthesized through mechanical activation followed by high-temperature synthesis. A single crystal of composition La2W1+xO6+3x (x≈0.22) was also grown using the method of crystallization from solution. Raman spectroscopy, thermal analysis, and thermogravimetry were used to study both ceramics and the single crystal. Impedance spectroscopy was employed to investigate their conductivity in dry and humid air. The hexagonal single crystal La2W1+xO6+3x (x≈0.22) exhibited strong luminescence in the IR region, while the hexagonal ceramics La2W1+xO6+3x (x≈0.11) and beta-La2WO6 ceramics did not. The polycrystalline La2W1+xO6+3x (x≈0.11) ceramics showed higher stability under redox conditions compared to the single crystal. The conductivity of the hexagonal single crystal La2W1+xO6+3x (x≈0.22) was of oxygen-ionic nature and lower than that of the ceramics La2W1+xO6+3x (x≈0.11) due to its perfect structure. The hexagonal solid solution La2W1+xO6+3x (x≈0.11) and the single crystal La2W1+xO6+3x (x≈0.22) both exhibited purely ionic conductivity without contribution from the protonic component, with similar activation energy values (0.89 and 1.08 eV, respectively). The synthesized beta-La2WO6 ceramics showed a small contribution of protonic conductivity in humid air, similar to that of the strontium-doped solid solution La1.96Sr0.04WO6-delta based on beta-La2WO6.
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
(2023)
Article
Electrochemistry
E. D. Baldin, T. A. Sorokin, E. I. Orlova, N. V. Gorshkov, E. P. Kharitonova, N. V. Lyskov, V. G. Goffman, V. I. Voronkova
Summary: In this study, three fluorite-like compounds NaLn(4)Mo(3)O(15)F (Ln = La, Pr, Nd) containing fluorine were synthesized using solid-phase synthesis in air. Their thermomechanical and conducting properties, as well as hygroscopicity, were investigated. The results confirmed that the synthesized specimens are isostructural to cubic compounds Ln(5)Mo(3)O(16) with fluorite-like structure. The specimens of NaLn(4)Mo(3)O(15)F (Ln = La, Pr, Nd) exhibited linear expansion in the temperature range of 20-600 degrees C, with thermal expansion coefficients (13-14) x 10(-6) K-1 close to those of conventional SOFC electrolytes like YSZ. Additionally, the weight loss of the specimens in the range of 30 to 700 degrees C was attributed to their hygroscopicity. The electrophysical properties of the compounds were studied using impedance spectroscopy in a humid atmosphere, and the presence of proton conductivity was observed.
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
(2023)
