Solid State Ionics最新文献

{"title":"Investigation of factors enhancing electrochemical properties of the porous La0.6Sr0.4CoO3-δ–Ce0.9Gd0.1O1.95 composite electrode for solid oxide fuel cell","authors":"Riyan Achmad Budiman ,&nbsp;Junichi Sakuraba ,&nbsp;Marika Sakai ,&nbsp;Mina Yamaguchi ,&nbsp;Shin-Ichi Hashimoto ,&nbsp;Keiji Yashiro ,&nbsp;Tatsuya Kawada","doi":"10.1016/j.ssi.2024.116724","DOIUrl":"10.1016/j.ssi.2024.116724","url":null,"abstract":"<div><div>One method for enhancing the electrochemical performance of a solid oxide fuel cell (SOFC) cathode at low temperatures is to mix two oxides with dissimilar structures to form a composite electrode. To understand the enhancement factor of the composite electrode consisting of an ionic conducting oxide, Ce_0.9Gd_0.1O_1.95 (GDC), and a mixed ionic and electronic conducting oxide, La_0.6Sr_0.4CoO_{3-<em>δ</em>} (LSC), electrochemical measurements were performed as a function of composition ratio, temperature (673–1073 K), and oxygen partial pressure (<em>p</em>(O₂), 1–10⁻⁴ bar). The area-specific conductivity (<em>σ</em>_E) that was obtained from the impedance spectra was enhanced at low temperature (<em>T</em> &lt; 873 K) in the high <em>p</em>(O₂) region (1–10⁻¹ bar) for the samples that contained above 40 % of GDC. However, the enhancement was not significant at high temperatures (<em>T</em> &gt; 873 K) under all measured <em>p</em>(O₂) conditions. Although some LSC particles were replaced by GDC, the enhancement of the chemical capacitance of the composite electrode was observed. This indicates that GDC particles function as ionic conducting pathways in the composite electrode. To understand the enhancement mechanism, the experimental data of <em>σ</em>_E were compared with the calculated results using a one-dimensional transmission-line model (1-D TLM) considering only the contributions of surface resistivity and ionic resistivity. Results indicate that there is a discrepancy between the measured result of <em>σ</em>_E and the calculated result. Several plausible reasons for the discrepancy were discussed, where the contribution of the triple phase boundary reaction resistivity could not be ignored in the calculation of <em>σ</em>_E.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116724"},"PeriodicalIF":3.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of multi-cationic B-sublattice upon crystal structure, transport and electrochemical properties of perovskite oxides LaBO3","authors":"A.M. Shalamova ,&nbsp;A.D. Koryakov ,&nbsp;E.P. Antonova ,&nbsp;D.A. Osinkin ,&nbsp;A.Yu. Suntsov","doi":"10.1016/j.ssi.2024.116729","DOIUrl":"10.1016/j.ssi.2024.116729","url":null,"abstract":"<div><div>The oxygen exchange with the gas phase, thermal expansion, and electrical transport properties of a multi-cationic perovskite LaMn_0.2Fe_0.2Co_0.2Ni_0.2Cu_0.2O_3–δ and its four-cation derivatives have been investigated. The B-sublattice content was found to impact the crystal structure, expansion, and oxygen release with temperature, as well as the electrical properties. The oxides exhibit predominantly p-type semiconducting behavior, with activation energies ranging from 0.04 to 0.26 eV. The optimal compound of LaFe_0.25Co_0.25Ni_0.25Cu_0.25O_3–δ was selected based on the cobination of the highest oxygen nonstiochiometry with maximum electrical conductivity, which reaches almost 500 S/cm at 750 °C. The symmetrical cell on LSGM supporting electrolyte has a polarization resistance of 0.12 Ω cm² at 800 °C and an activation energy of 152 kJ/mol. The obtained characteristic was found to be better than one for the five-cation perovskite, casting doubt on the advantages of applying the high-entropy materials concept to the development of solid oxide fuel cells.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116729"},"PeriodicalIF":3.0,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical properties of high entropy layered cathode structures","authors":"Junbo Zhang ,&nbsp;Xiqi Zhang ,&nbsp;Nini Qian ,&nbsp;Bingbing Chen ,&nbsp;Jianqiu Zhou","doi":"10.1016/j.ssi.2024.116726","DOIUrl":"10.1016/j.ssi.2024.116726","url":null,"abstract":"<div><div>Based on the high entropy theory, Fe, Mn, and Ni elements are doped into the transition metal Co sites in the LiCoO₂ cathode structure. Two high entropy oxide cathode structures, namely the LiTM_uniformO₂ model and the LiTM_non-uniformO₂ model, are constructed based on whether the distribution of transition metal elements is uniform. The crystal structure parameters, mechanical performance parameters, anisotropy index, and stress-strain performance of two high entropy models are calculated using first principles calculation method, and the structural stability is analyzed from a mechanical perspective. The effects of lithium-ion deintercalation on the crystal structure, mechanical properties, and stress-strain properties of two structures during the charging and discharging processes are studied. The research results indicate that the synergistic effect of multiple transition metal atoms is beneficial for improving the stability and mechanical properties of the cathode structure. The study of mechanical properties during delithiation process shows that as the degree of lithium removal increases, the Young's modulus of the material continues to decrease, while plasticity and toughness first increase and then decrease. Compared with non-uniform model, uniform model has better mechanical properties and cycle stability. The stress-strain performance of the LiTM_uniformO₂ model is superior to that of the LiTM_nonuniformO₂ model, and it can resist the influence of internal stress during battery cycling. This work provides some theoretical guidance for studying cathode materials with excellent mechanical properties and high energy density.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116726"},"PeriodicalIF":3.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison between gas phase and electrochemical nitridation of 8YSZ under nitrogen atmosphere to produce nitride conducting solid electrolytes","authors":"Onur Ozturk ,&nbsp;Doruk Dogu","doi":"10.1016/j.ssi.2024.116728","DOIUrl":"10.1016/j.ssi.2024.116728","url":null,"abstract":"<div><div>Ammonia is one of the most used chemicals in the world. It is commonly synthesized by the Haber-Bosch process which requires high temperature (450–500 °C) and pressure (up to 300 bar). This process is thermodynamically limited and causes environmental problems due to CO₂ emissions caused by the production of H₂ required by this process from fossil fuels. Electrocatalytic processes using oxide and proton-conducting electrolytes are gaining interest for ammonia production to overcome these limitations. Although both methods overcome many of the problems associated with the Haber-Bosch process, due to strong N<img>N triple bonds selectivity towards ammonia decreases. This is because the reaction occurs on the same side of the membrane electrode assembly, namely the cathode electrode, where nitrogen is fed in the gas phase and nitrogen bonds should be broken to react with hydrogen ions readily available on the electrolyte surface. Since N<img>N bond cleavage requires very high energy, hydrogen ions generally recombine to form H₂ before the nitrogen can be ionized. Nitride conducting electrolytes can be an answer to this problem because in their use nitrogen ionization and ammonia synthesis reactions occur at different electrodes and nitrogen is fed to the reaction site in the ionic form which is more active for the reaction. This study focuses on two alternative methods for the production of nitride conducting solid electrolytes by nitridation of 8 % Yttria Stabilized Zirconia (8YSZ). Two different methods for nitridation were studied: gas phase powder nitridation and electrochemical nitridation of YSZ electrolytes. This study shows that although gas phase nitridation of YSZ powders at high temperatures under nitrogen is not efficient, electrochemical nitridation of YSZ electrolytes is a highly promising method to produce nitride conducting electrolytes.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116728"},"PeriodicalIF":3.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive study on lithium-ion battery cathode LiNixCoyMn1-x-yO2 as an air electrode for protonic ceramic fuel cells","authors":"Yibei Wang ,&nbsp;Biao Wang ,&nbsp;Dongchao Qiu ,&nbsp;Bingbing Niu ,&nbsp;Chunling Lu","doi":"10.1016/j.ssi.2024.116722","DOIUrl":"10.1016/j.ssi.2024.116722","url":null,"abstract":"<div><div>The protonic ceramic fuel cells (PCFCs) exhibits a remarkable high-energy conversion efficiency and significant application potential at low temperatures. In this context, the layered ternary lithium-ion batteries (LIB) material, LiNi_<em>x</em>Co_yMn_1-x-yO₂ (LNCM), is explored as a potential cathode for PCFCs. Utilizing density functional theory (DFT) calculations, we have conducted a comprehensive analysis of oxygen vacancies, hydration energy, density of states, and other pertinent properties to evaluate these ternary materials. Both theoretical and experimental findings suggest that LiNi_0.5Co_0.2Mn_0.3O₂ (LNCM523) may offer the optimal performance as a PCFCs cathode. Notably, after calcination in air at 700 °C for 100 h, LNCM523 displayed no phase transition or the emergence of new phases. The impedance of LNCM523, measured on a BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δ (BZCYYb) electrolyte, is 0.225 Ω cm² at 650 °C. At this temperature, the peak power density of the single cell reaches 355 mW cm⁻². Moreover, during a 100-h stability test conducted at 550 °C, the output performance of the single cell remained unaltered. In electrolysis mode, at 650 °C and 1.3 V, the current density for electrolysis water attained 1.75 A cm⁻². Based on these promising results, LNCM emerges as a viable cathode candidate for PCFCs.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116722"},"PeriodicalIF":3.0,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical performance of ultra-high‑nickel layered oxide cathode synthesized using different lithium sources","authors":"Xuelei Li ,&nbsp;Weibo Yang ,&nbsp;Yinzhou Wang ,&nbsp;Liu Tonggang","doi":"10.1016/j.ssi.2024.116721","DOIUrl":"10.1016/j.ssi.2024.116721","url":null,"abstract":"<div><div>Ultra-high‑nickel layered oxide cathodes are extensively explored in lithium-ion battery research owing to their high specific capacity. However, the rapid decline in discharge specific capacity considerably limits their long-term performance. The choice of lithium precursors is crucial in enhancing both the structural and cycle stability of these batteries, yet this aspect has not been adequately addressed in existing studies. In this study, Li₂O, LiOH, and Li₂CO₃ were used as lithium precursors to synthesize LiNi_0.92Co_0.04Mn_0.04O₂ (NCM92) cathodes. We compare the structure and electrochemical properties of NCM92 cathode materials prepared with these three lithium precursors, examining a lithium residual layer on the surface of three NCM92 and thus inferring the varying amounts of Li incorporation into the bulk lattice. Our findings highlight the effect of lithium precursors on the rapid degradation of NCM92's discharge capacity. Notably, the NCM92–Li₂O cathode demonstrates a higher discharge specific capacity and superior capacity retention after 100 cycles compared to cathodes synthesized with LiOH and Li₂CO₃. This study provides valuable insights and guidance for further research on ultra-high‑nickel layered oxide cathode materials.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116721"},"PeriodicalIF":3.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of La0.1Sr0.9TiO3 electrochemical response as anode for SOFC and its relation with microstructure","authors":"Ernesto Tagarelli ,&nbsp;Jesús Vega-Castillo ,&nbsp;Mariela Ortiz ,&nbsp;Horacio Troiani ,&nbsp;Corina M. Chanquía ,&nbsp;Alejandra Montenegro-Hernández","doi":"10.1016/j.ssi.2024.116719","DOIUrl":"10.1016/j.ssi.2024.116719","url":null,"abstract":"<div><div>La_0.1Sr_0.9TiO₃ (LST) perovskite has been studied as anode material for Intermediate Temperature Solid Oxide Fuel Cell (IT-SOFC) applications. LST powders were synthesized by two chemical methods, one employed hexamethylenetetramine (HMTA) as a complexing agent while the other utilized ethylenediaminetetraacetic acid (EDTA). These approaches yielded different microstructures as evidenced by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and N₂ adsorption/desorption isotherms studies. The effect of the microstructure on the electrochemical behavior of the obtained electrodes was studied by Electrochemical Impedance Spectroscopy (EIS) by varying the hydrogen partial pressure and the temperature. In addition, the evolution of specific area resistance with the hydrogen partial pressure allowed the identification of the reaction mechanism. The results of EIS were studied by electrical equivalent circuit (EEC) and distribution of relaxation times (DRT). The results suggest that the hydrogen oxidation reaction (HOR) limiting step for both samples is controlled by hydrogen dissociative-adsorption at the surface. The hydrogen adsorption is faster at the electrode formed by smaller nanoparticles, in which the activation energy decreases and the rate coefficient changes.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116719"},"PeriodicalIF":3.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ionic liquid/polybenzimidazole/SiO2 composite membranes for medium temperature operating","authors":"Yuliya A. Fadeeva,&nbsp;Liudmila E. Shmukler,&nbsp;Liubov P. Safonova","doi":"10.1016/j.ssi.2024.116720","DOIUrl":"10.1016/j.ssi.2024.116720","url":null,"abstract":"<div><div>Fuel cells (FC) with proton exchange membranes (PEMs) are seen as an alternative energy source due to their efficiency, power density, low emissions, and reliable energy supply. Proton exchange membranes based on polybenzimidazole have shown potential for operating at high and medium temperatures to enhance FCs performance. New composite membranes made from <em>m</em>-PBI and diethylammonium mesylate [DEAH/MsO] ionic liquid were prepared trough a solution casting method. Silica nanopowder (SiO₂) was used as an inorganic filler at varying concentrations (0.5–20 wt%). The ionic liquid content in the membranes ranged from 1 to 2.5 mol per mole of PBI monomer units. Our study is focused on the thermal properties, such as thermal stability and phase transition temperatures, morphology, conductivity, and electrochemical stability of the membranes. The influence of the inorganic filler on these properties was also discussed.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116720"},"PeriodicalIF":3.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mixed-valence Sm-doped LaF3 crystals as ion-electron conductors: Crystal growth and impedance characterization","authors":"D.N. Karimov,&nbsp;N.I. Sorokin","doi":"10.1016/j.ssi.2024.116710","DOIUrl":"10.1016/j.ssi.2024.116710","url":null,"abstract":"<div><div>The single crystals with the composition La_{1−<em>y</em>}(Sm³⁺_{1−<em>x</em>}Sm²⁺_<em>x</em>)_<em>y</em>F_{3−<em>xy</em>} <span><math><mi>L</mi><msub><mi>a</mi><mrow><mn>1</mn><mo>−</mo><mi>y</mi></mrow></msub><msub><mfenced><mrow><mi>S</mi><msubsup><mi>m</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msubsup><mi>S</mi><msubsup><mi>m</mi><mi>x</mi><mrow><mn>2</mn><mo>+</mo></mrow></msubsup></mrow></mfenced><mi>y</mi></msub><msub><mi>F</mi><mrow><mn>3</mn><mo>−</mo><mi>xy</mi></mrow></msub></math></span>(<em>y</em> = 0.04) were grown from melt by the vertical Bridgman technique. A part of the Sm³⁺ doping ions in LaF₃ matrix is reduced to the Sm²⁺ <em>oxidation</em> state due to interaction with carbon during the growth process. The crystals were studied by X-ray diffraction analysis, optical and impedance spectroscopy. The Sm-doped crystals LaF₃ are single-phase, retaining the tysonite-type structure (sp. gr. <em>P-3c1</em><span><math><mi>P</mi><mover><mn>3</mn><mo>̄</mo></mover><mi>c</mi><mn>1</mn></math></span>) and demonstrate a bipolar electrical conductivity mechanism. Both the ionic conductivity σ_i = 4.7 × 10⁻⁵ S/cm caused by heterovalent substitutions of La³⁺ for Sm²⁺ and the comparable electronic conductivity σ_e = 3 × 10⁻⁵ S/cm due to the variable <em>oxidation states</em> Sm²⁺/Sm³⁺ ions were detected for the grown crystals. The discovered mixed ionic-electronic conductivity of La_0.96Sm³⁺_0.004Sm²⁺_0.036F_2.964 crystals opens up a new direction for the practical application of the tysonite-type fluorides as a component of electrode materials for fluorine-ion current sources.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116710"},"PeriodicalIF":3.0,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of the position of Mg replacing Ni on O3-NaNi1/3Fe1/3Mn1/3O2 on the structural stability of cathode materials","authors":"Jingxiu Tian ,&nbsp;Li-ang Zhu ,&nbsp;Hongshun Miao ,&nbsp;Xiangxin Li ,&nbsp;Yan Liu","doi":"10.1016/j.ssi.2024.116718","DOIUrl":"10.1016/j.ssi.2024.116718","url":null,"abstract":"<div><div>O3-NaNi_1/3Fe_1/3Mn_1/3O₂ (NaNFM) materials are susceptible to complex phase transitions during electrical cycling leading to poor structural, capacity retention and multiplicity properties. These drawbacks hinder the application of NaNFM in sodium-ion batteries. Here, Mg²⁺ with larger ionic radius was used to dope its transition metal layer Ni site. The effects of Mg²⁺ doped NaNFM crystal structure and transition metal valence states on its electrochemical properties were investigated by XRD, SEM, and XPS. The capacity retention of NaNMFM-0.02 (84.05 %) was higher than that of NaNFM (73 %) after 200 cycles of the material at 5C. In addition, NaNMFM-0.02 achieved a first discharge specific capacity of 146.5 mAh/g at high voltage. Based on structural and electrochemical analyses, this improvement is attributed to the fact that magnesium acts as a “pillar” to stabilize the crystal structure of NaNFM, while magnesium doping reduces the Jahn-Teller effect. As a result, the material has better electrochemical properties.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"417 ","pages":"Article 116718"},"PeriodicalIF":3.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}