Solid State Ionics最新文献

{"title":"Ca1−xSrxMnO3−δ granules, pellets, foams: Influence of fabrication conditions and microstructure on oxidation kinetics","authors":"Lena Klaas ,&nbsp;Asmaa Eltayeb ,&nbsp;Dorottya Kriechbaumer ,&nbsp;Martin Roeb ,&nbsp;Christian Sattler","doi":"10.1016/j.ssi.2025.116803","DOIUrl":"10.1016/j.ssi.2025.116803","url":null,"abstract":"<div><div>Microstructure and oxidation kinetics are closely intertwined factors that significantly influence the behavior of materials in oxidative environments. This relationship is of particular importance for redox materials such as <span><math><msub><mi>Ca</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mi>Sr</mi><mi>x</mi></msub><msub><mi>MnO</mi><mrow><mn>3</mn><mo>−</mo><mi>δ</mi></mrow></msub></math></span>, where reversible oxygen ions exchange and oxidation state shifts are key to their functionality. In the first study, scanning electron microscope (SEM) was used to examine how varying Sr content affects the morphology and microstructure of <span><math><msub><mi>Ca</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mi>Sr</mi><mi>x</mi></msub><msub><mi>MnO</mi><mrow><mn>3</mn><mo>−</mo><mi>δ</mi></mrow></msub></math></span> powder compositions. The results indicate that increasing Sr content leads to smaller particle sizes and improved particle size homogeneity. Granules with Sr concentrations ranging from 0 % to 40 % exhibit notable changes in morphology. However, the microporosity and d50 vary slightly across the samples in a non-monotonic manner, with no clear trend emerging with respect to Sr concentration. The second study investigates how macrostructural forms, such as foams and pellets, impact oxidation kinetics in <span><math><msub><mi>Ca</mi><mn>0.8</mn></msub><msub><mi>Sr</mi><mn>0.2</mn></msub><msub><mi>MnO</mi><mrow><mn>3</mn><mo>−</mo><mi>δ</mi></mrow></msub></math></span>. Parameters including particle size distribution of the raw material, overall microporosity, and structural characteristics of these macrostructures were analyzed for their effect on oxidation rates. Findings reveal that macrostructural configuration, alongside microstructural features like microporosity, significantly impacts oxidation kinetics. These studies collectively underscore the critical relationship between dopant concentration, microstructural characteristics, and structural morphology in determining the oxidative behavior of <span><math><msub><mi>Ca</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mi>Sr</mi><mi>x</mi></msub><msub><mi>MnO</mi><mrow><mn>3</mn><mo>−</mo><mi>δ</mi></mrow></msub></math></span>, providing key insights into optimizing material performance in redox environments.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116803"},"PeriodicalIF":3.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced battery cathode microstructure analysis through operando synchrotron X-ray tomography and super-resolution deep learning","authors":"Mohammad Javad Shojaei ,&nbsp;Abeiram Sivarajah ,&nbsp;Tayeba Safdar ,&nbsp;Oxana V. Magdysyuke ,&nbsp;Chu Lun Alex Leung ,&nbsp;Chun Huang","doi":"10.1016/j.ssi.2025.116818","DOIUrl":"10.1016/j.ssi.2025.116818","url":null,"abstract":"<div><div>Lithium ion batteries are pivotal for clean energy storage and mitigating climate change. In this study, we employ <em>operando</em> synchrotron X-ray computed tomography to investigate the dynamic evolution of battery cathode microstructure. We focus on tracking changes in porosity and pore size distribution at the microscale and cathode thickness at the macroscale during the lithiation and delithiation processes within a commercially configured battery. Image quality was enhanced using both conventional image processing methods and a Super-Resolution Convolutional Neural Network (SRCNN) model. Our findings revealed a slight increase in the cathode solid volume fraction and specific surface area as the battery transitioned from its pristine state to fully lithiated, followed by a reduction during delithiation. This behavior was attributed to the expansion of the cathode material and phase transitions during lithiation, which split larger pores into smaller ones, as evidenced by the increase in surface area. Cathode thickness also exhibited expansion during lithiation and contraction during delithiation. These results offer valuable insights into the structural changes that contribute to battery aging, helping researchers better understand how these different parameters change over time. This understanding is crucial for designing more durable and sustainable batteries in the future, both in terms of specific design and material selection, to enhance resistance during charge and discharge cycles to improve performance and longevity.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116818"},"PeriodicalIF":3.0,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mixed-potential NH3 sensor with Fe2(MoO4)3 as the sensing electrode: Performance and mechanistic insights","authors":"Jingxin Wang,&nbsp;Hongming Liu,&nbsp;Hai Xiong,&nbsp;Jianzhong Xiao","doi":"10.1016/j.ssi.2025.116814","DOIUrl":"10.1016/j.ssi.2025.116814","url":null,"abstract":"<div><div>Ammonia (NH₃) is recognized as an important exhaled gas in patients with renal and hepatic diseases, with its concentration closely correlated to disease progression. Thus, detecting NH₃ in exhaled breath is crucial for self-diagnosis, disease monitoring, and large-scale screening of specific populations. In this study, we synthesized the sensing material iron molybdate (Fe₂(MoO₄)₃) and systematically investigated its performance in NH₃ detection. The results indicated that the sensor can realize the detection of 0.38 ppm NH₃, with the optimal sintering temperature identified as 550 °C and the optimal operating temperature as 475 °C. The response of the sensor to 5 ppm NH₃ is −24.3 ± 0.7 mV with response/recovery time of (55 ± 4)/ (86 ± 5) s. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM) were applied to analysis the phase composition and morphology. The sensing mechanism was also discussed basing on the results of temperature-programmed desorption (TPD) and electrochemical impedance spectroscopy (EIS). Furthermore, the sensor exhibited reliable and stable performance across different test cycles, demonstrating its short-term and long-term stability.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116814"},"PeriodicalIF":3.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548650","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":"High concentrations of sodium dodecylbenzene sulfonate electrolyte additives improve the performance of aqueous zinc ion batteries","authors":"Qing-peng Bao ,&nbsp;Peng-cheng Tang ,&nbsp;Zhe Gong ,&nbsp;Peng-fei Wang ,&nbsp;Fa-nian Shi ,&nbsp;Min Zhu","doi":"10.1016/j.ssi.2025.116817","DOIUrl":"10.1016/j.ssi.2025.116817","url":null,"abstract":"<div><div>In aqueous zinc-ion batteries (AZIBs), traditional electrolytes are unable to fully utilise the potential of the zinc anode due to severe dendrite growth and side reactions on the zinc metal anode. Therefore, this study adds a high concentration of sodium dodecyl benzenesulfonate (SDBS) to the electrolyte to achieve the dual purpose of regulating the zinc deposition process and protecting the zinc substrate. The formation of large micelles induced by SDBS plays a stabilizing role, reduces fluctuations in the electrolyte, and enhances the orderly transfer of Zn²⁺, thereby increasing the amount of ion transfer. Furthermore, SDBS adsorbed on the zinc anode surface improves surface wettability, accelerates the three-dimensional diffusion process and guides Zn²⁺ to form a uniform flaky deposited layer. Additionally, the addition of SDBS effectively replaces the water-rich electric double layer (EDL) on the zinc surface with SDB⁻, significantly mitigating the harmful effects of H₂O on the anode. High-concentration SDBS therefore exhibits excellent performance in symmetrical batteries (over 2000 h at 0.8 mA cm⁻², 0.8 mAh cm⁻²). This study found that with the addition of a high concentration of surfactant, Zn²⁺ has a rapid three-dimensional diffusion process and horizontal deposition behavior, which is instructive for exploring ion transfer in high-concentration electrolyte additives.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116817"},"PeriodicalIF":3.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535391","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":"Structural phase transition behavior of tetragonal and orthorhombic SrFeO3-δ and its effects on thermal expansion and electrical conduction properties","authors":"Taizo Yoshino,&nbsp;Shiho Hatano,&nbsp;Takayuki Sugimoto,&nbsp;Kosuke Shido,&nbsp;Takuya Hashimoto","doi":"10.1016/j.ssi.2024.116768","DOIUrl":"10.1016/j.ssi.2024.116768","url":null,"abstract":"<div><div>Oxides with a high concentration of oxide-ion vacancies and high degree of crystal symmetry have attracted interest as high oxide-ion or hole and oxide-ion mixed conductors. For development of new oxide or mixed conductors, the structural phase transition of SrFeO_{3-<em>δ</em>} from tetragonal or orthorhombic perovskite with an ordered arrangement of oxide-ion vacancies to cubic perovskite with a random arrangement of oxide-ion vacancies was investigated via thermogravimetric-differential thermal analysis and X-ray diffraction at various temperatures. SrFeO_2.87 with tetragonal perovskite underwent the first-order structural phase transition to cubic perovskite without variation of <em>δ</em> at approximately 300 °C as has been frequently reported; however, the first-order structural phase transition of SrFeO_2.75 from orthorhombic to cubic without variation of <em>δ</em> occurred at approximately 420 °C, which was evidenced for the first time in this study. An abrupt increase was noted in both the thermal expansion and electrical conductivity with each phase transition. Our findings related to the effect of the structural phase transition on the thermal expansion and electrical conductivity of two different SrFeO_{3-<em>δ</em>} systems may guide their application as electrodes in solid oxide fuel cells and gas sensors.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116768"},"PeriodicalIF":3.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535394","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":"Na+ self-diffusion and ionic transport in sodium β″-alumina","authors":"Sarah Lunghammer,&nbsp;H. Martin R. Wilkening","doi":"10.1016/j.ssi.2025.116809","DOIUrl":"10.1016/j.ssi.2025.116809","url":null,"abstract":"<div><div>Fast ion transport is crucial for solid materials to serve as electrolytes, with only a few classes achieving the high ionic conductivity needed for practical use. The discovery of fast ion transport in Na <em>β</em>″-alumina not only introduced a groundbreaking class of materials but also marked the advent of the research field now known as <em>solid-state ionics</em>. Since the early 1980s, Na <em>β</em>″-alumina has been widely recognized as a solid electrolyte for high-temperature sodium-based batteries, such as Na‑sulfur batteries. Despite numerous studies on the diffusion and transport properties of layer-structured Na <em>β</em>″-alumina, a comprehensive investigation combining conductivity and nuclear magnetic resonance (NMR) to study both short-range and long-range ion dynamics has been lacking. In this work, we used a commercially available, highly sintered Na <em>β</em>″-alumina sample to explore Na⁺ dynamics in detail through GHz conductivity spectroscopy and ²³Na nuclear spin relaxation. The two methods provide a rather consistent picture of ion transport. While long-range Na⁺ transport, reaching a conductivity of 4 mS cm⁻¹ at ambient temperature, is governed by an activation energy of 0.3 eV, short-range motions sense a barrier of 0.13 eV. The Arrhenius pre-factor obtained from characteristic electric relaxation frequencies is consist with that determined from diffusion-induced longitudinal NMR spin-lattice relaxation rates if analyzed with a modified BPP (Bloembergen, Purcell, Pound) spectral density function.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116809"},"PeriodicalIF":3.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing ion migration in halide perovskites: Implication and applications","authors":"Sungwoo Park ,&nbsp;Hyeon-Ji Lee ,&nbsp;Ho Won Jang","doi":"10.1016/j.ssi.2025.116816","DOIUrl":"10.1016/j.ssi.2025.116816","url":null,"abstract":"<div><div>Ion migration in halide perovskites (HPs) has traditionally been viewed as a challenge to overcome, often associated with device instability and degradation. However, recent advancements indicate that ion migration, when precisely controlled, can be harnessed to enable dynamic and reconfigurable functionalities in advanced electronic devices. This review redefines the role of ion migration in HPs, exploring its mechanisms and implication as a multifaceted approach for innovation rather than a limitation to mitigate. We outline the impacts of its dual role and strategies to harness ion migration in HPs. Finally, we highlight the applications of ion migration in advanced technologies and provide a forward-looking perspective on its pivotal role in next-generation devices including memristors for data storage and neuromorphic computing.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116816"},"PeriodicalIF":3.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519156","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":"What limits the rate of thermally activated self-discharge of nickel oxyhydroxide electrodes?","authors":"Elena S. Davydova ,&nbsp;Yossi Halpern ,&nbsp;Anna Breytus ,&nbsp;Avner Rothschild","doi":"10.1016/j.ssi.2025.116815","DOIUrl":"10.1016/j.ssi.2025.116815","url":null,"abstract":"<div><div>Nickel (oxy)hydroxide electrodes are widely used in alkaline batteries and water electrolyzers. Their operation involves reversible phase transformations (Ni(OH)₂ + OH⁻ <span><math><mo>⇌</mo></math></span> NiOOH + H₂O + e⁻) upon charge and discharge at potentials below the onset of oxygen evolution; electrocatalytic oxygen evolution reaction (OER, 4OH⁻ → O₂ + 2H₂O + 4e⁻) at higher potentials; and spontaneous chemical self-discharge (4NiOOH + 2H₂O → 4Ni(OH)₂ + O₂) that is accelerated at elevated temperatures. This work studied compositional and microstructural changes in nickel-boride-based electrodes during cold (room temperature) charge and hot (95 °C) self-discharge cycles that enable decoupled membraneless water electrolysis. Pristine electrodes comprised agglomerates of equiaxed nickel boride nanoparticles that transformed into boron-depleted Ni(OH)₂ platelets upon chemical aging and electrochemical activation treatments followed by operation in cold charge and hot self-discharge cycles. Cyclic operation in alternating cold and hot alkaline electrolytes resulted in crystallization and growth of mosaic hexagonal plates that seem to have been formed by detachment of small platelets from the agglomerates and oriented reattachment onto the edges of the growing plates. Concomitant with the plate growth, the self-discharge kinetics (at 95 °C) decreased from one cycle to another whilst the OER kinetics (at room temperature) slightly enhanced. This observation suggests that bulk processes involving solid-state diffusion and phase transformation limit the rate of thermally activated self-discharge rather than OER. This finding sheds new light on the mechanism of the self-discharge reaction that limits the performance of alkaline batteries and decoupled alkaline water electrolyzers.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116815"},"PeriodicalIF":3.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of structural, dielectric, and AC conductivity response in potassium-based polymer electrolytes: Tailoring PEO-PVDF blends for enhanced performance","authors":"Venkata Ramana Jeedi ,&nbsp;Kiran Kumar Ganta ,&nbsp;Rayudu Katuri ,&nbsp;N. Kundana ,&nbsp;Malla Reddy Yalla ,&nbsp;Anji Reddy Polu ,&nbsp;Firdaus Mohamad Hamzah","doi":"10.1016/j.ssi.2025.116811","DOIUrl":"10.1016/j.ssi.2025.116811","url":null,"abstract":"<div><div>Polymer electrolyte membranes comprising Poly(ethylene Oxide) and Poly(vinylidene Fluoride) blends complexed with KNO₃ were developed using the solution casting technique by varying the polymers. These systems were extensively characterized through X-Ray Diffractogram, Fourier Transform Infrared, and SEM to analyze their complexation behavior, functional groups, and morphology. The ionic conductivity and electrical characteristics were investigated via impedance spectroscopy over a frequency up to 10 MHz. Dielectric properties, including the dielectric constant (ε'), dielectric loss (ε\"), relaxation time (τ), and modulus (M' and M\"), were also examined. The AC conductivity profile revealed a frequency-independent plateau, indicating ion migration as the primary contributor to conductivity. The 80PEO:20PVDF composition exhibited the highest ionic conductivity (1.60 × 10⁻⁴ S.cm⁻¹) and the least activation energy, attributed to efficient ion dissociation and structural reorganization due to the interactions between PEO and PVDF molecules.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116811"},"PeriodicalIF":3.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488822","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":"Enhanced oxygen reduction reaction activity of Ca doping CoFe2O4 as cathodes for solid oxide fuel cells","authors":"Fangjie Liu,&nbsp;Zhengqi Su,&nbsp;Haizhao Li,&nbsp;Qingjie Wang,&nbsp;Xin Wang,&nbsp;Weiwei Shang,&nbsp;Bin Xu","doi":"10.1016/j.ssi.2025.116812","DOIUrl":"10.1016/j.ssi.2025.116812","url":null,"abstract":"<div><div>CoFe₂O₄ (CFO) was identified as one of the potential cathode materials for solid oxide fuel cells (SOFCs). However, optimization was required due to limitations of electrochemical performance. Here effects of Ca doping on CFO were investigated for the oxygen reduction reaction (ORR) properties. Co_1-xCa_xFe₂O₄ (CCxFO, x = 0, 0.2 (CC2FO), 0.4 (CC4FO)) were synthesized with sol-gel method. Oxygen vacancy concentration was increased by Ca doping enhancing the electrochemical performance of CFO. At 750 °C, the polarization resistance (R_p) of CC4FO was 1.04 Ω·cm², which was 1.09 Ω·cm² lower than that of CFO (2.13 Ω·cm²). The electronic conductivity value (σ) of CC4FO was 0.614 at 750 °C and the activation energy (E_a) of CC4FO was 102.81 kJ/mol. The results indicated that improvements in the ORR activity of the CFO spinel material were mainly attributed to an increase in oxygen vacancy concentration and oxygen surface exchange rate due to Ca doping, CC4FO showed promising potential as SOFC cathode.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"422 ","pages":"Article 116812"},"PeriodicalIF":3.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508011","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}