Solid State Ionics最新文献_第2页

Synthesis of LiFePO4 cathode materials from amorphous FePO4 precursor: Effects of Li/P molar ratio on crystal defect formation and electrochemical performance 非晶FePO4前驱体合成LiFePO4正极材料：Li/P摩尔比对晶体缺陷形成和电化学性能的影响

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-17 DOI: 10.1016/j.ssi.2025.117050

Yongsheng Chen , Siman Yang , Jianbin Zheng , Mingwei Hu , Mingdeng Wei , Peixun Xiong

{"title":"Synthesis of LiFePO4 cathode materials from amorphous FePO4 precursor: Effects of Li/P molar ratio on crystal defect formation and electrochemical performance","authors":"Yongsheng Chen , Siman Yang , Jianbin Zheng , Mingwei Hu , Mingdeng Wei , Peixun Xiong","doi":"10.1016/j.ssi.2025.117050","DOIUrl":"10.1016/j.ssi.2025.117050","url":null,"abstract":"<div><div>As an excellent cathode material, lithium iron phosphate (LiFePO<sub>4</sub>) has been widely used in commercial lithium-ion batteries (LIBs). However, the impact of synthetic conditions on LiFePO<sub>4</sub> cathode derived from amorphous iron phosphate (FePO<sub>4</sub>) remains underexplored. In the present study, the effects of Li/P molar ratio on the crystallinity and electrochemical properties of LiFePO<sub>4</sub> were investigated in detail using FePO<sub>4</sub> as a precursor. When the Li/P molar ratio in LiFePO<sub>4</sub> was approximately 1, the material exhibited an excellent long-term cycling stability with a high capacity retention of 97 % after 500 cycles. In addition, multiple characterizations demonstrate that the higher molar ratio of the Li/P resulted in the higher concentration of defects in LiFePO<sub>4</sub> crystals, which not only reduced the reversible capacity but also compromised the structural stability, leading to a poor cyclic stability and quick capacity degradation. Therefore, such a work could provide a scientific insight for rational design and synthesis of high-performance LiFePO<sub>4</sub> cathodes from amorphous FePO<sub>4</sub> precursor.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117050"},"PeriodicalIF":3.3,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323001","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}

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Highly conductive Na5YSi4O12 ceramic solid electrolyte by controlling Na deficiency in the precursors 通过控制前驱体钠缺乏制备高导电性Na5YSi4O12陶瓷固体电解质

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-16 DOI: 10.1016/j.ssi.2025.117049

Yoshiki Yasuda, Genta Tateno, Tomohiro Tojo, Ryoji Inada

{"title":"Highly conductive Na5YSi4O12 ceramic solid electrolyte by controlling Na deficiency in the precursors","authors":"Yoshiki Yasuda, Genta Tateno, Tomohiro Tojo, Ryoji Inada","doi":"10.1016/j.ssi.2025.117049","DOIUrl":"10.1016/j.ssi.2025.117049","url":null,"abstract":"<div><div>Na<sub>5</sub>YSi<sub>4</sub>O<sub>12</sub> (NYSO) is known as a fast sodium-ion conductive oxide with both high ionic conductivity above 1 mS cm<sup>−1</sup> at room temperature and excellent electrochemical stability against sodium metal anode, making it promising for solid-state sodium battery application. In this study, we investigated the influence of non-stoichiometry in the precursor composition on the crystal phase, microstructure and ionic conducting property of NYSO. It is found that NYSO prepared from the precursor with slight sodium-deficient composition showed the highest total (bulk + grain boundary) conductivity of 2.8 mS cm<sup>−1</sup> at room temperature, which is superior to NYSO with stoichiometric precursor composition (∼ 1 mS cm<sup>−1</sup>). Although excess Na deficiency in the precursor results in the formation of Na<sub>3</sub>YSi<sub>3</sub>O<sub>9</sub> phase, it does not influence so much on the sinterability and grain-boundary resistance of NYSO. Mitigation of Na<sub>9</sub>YSi<sub>6</sub>O<sub>18</sub> phase formation during the fabrication is very important for the densification and reduction of grain-boundary resistance in NYSO ceramic electrolyte.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117049"},"PeriodicalIF":3.3,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323002","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}

引用次数: 0

Direct electrochemical ammonia synthesis from water and air via solid-state protonic electrochemical cells – A critical review 通过固态质子电化学电池从水和空气中直接电化学合成氨

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-15 DOI: 10.1016/j.ssi.2025.117042

Jonathan Perry, Jafar Zanganeh, Behdad Moghtaderi

{"title":"Direct electrochemical ammonia synthesis from water and air via solid-state protonic electrochemical cells – A critical review","authors":"Jonathan Perry, Jafar Zanganeh, Behdad Moghtaderi","doi":"10.1016/j.ssi.2025.117042","DOIUrl":"10.1016/j.ssi.2025.117042","url":null,"abstract":"<div><div>Solid-state protonic electrochemical cells (SSPECs) are gaining attention as a technology that has great potential for sustainable ammonia (NH₃) synthesis, energy storage, and power generation, while providing seamless integration with renewable energy thereby offering a pathway towards a low-carbon economy. However, challenges remain in achieving industrially relevant NH₃ production rates and overall energy efficiencies required for commercial applications. Key barriers are outlined, including the thermodynamically favoured hydrogen evolution reaction (HER) at the cathode, which limits selectivity and lowers efficiencies. Recent advancements are highlighted including the importance of rational catalyst design, often focusing on functionalisation or defect-engineered sites, and integrated systems optimisation. In particular, co-fed electrochemical nitrogen reduction (eNRR) presents a strategy for enhancing NH<sub>3</sub> yields, while plasma-assisted processes also show promise in increasing both NH₃ production rates and selectivity. Furthermore, the lack of consistent ammonia detection methods has been outlined as a critical variable in comparative performance evaluation, which significantly impacts robust benchmarking of new catalyst and system designs. Despite these current limitations, SSPECs present a compelling opportunity for converting renewable electricity into liquid fuels, with significant potential for scaling solid-state protonic eNRR.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117042"},"PeriodicalIF":3.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322998","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}

引用次数: 0

Quantifying protons in triple conducting perovskite-type oxides via laser-induced breakdown spectroscopy – A comparative validation approach 通过激光诱导击穿光谱定量三重导电钙钛矿型氧化物中的质子-一种比较验证方法

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-15 DOI: 10.1016/j.ssi.2025.117033

Melanie Maurer, Maximilian Weiss, Matthias Weil, Andreas Limbeck, Alexander Karl Opitz

{"title":"Quantifying protons in triple conducting perovskite-type oxides via laser-induced breakdown spectroscopy – A comparative validation approach","authors":"Melanie Maurer, Maximilian Weiss, Matthias Weil, Andreas Limbeck, Alexander Karl Opitz","doi":"10.1016/j.ssi.2025.117033","DOIUrl":"10.1016/j.ssi.2025.117033","url":null,"abstract":"<div><div>Proton-conducting oxides are promising materials for renewable energy technologies - e.g. as electrolytes and electrodes in solid oxide cells or membranes for hydrogen purification. Particularly relevant for these applications are perovskites, which can accommodate high concentrations of protons in their crystal structure. However, quantifying the proton concentration is challenging under reducing conditions, OH uptake and oxygen loss occur simultaneously, causing compensating weight changes. Thus, attributing weight changes directly to OH uptake is not possible without complementary techniques for validation. Here, we focus on quantifying the proton concentration in the triple conducting perovskite-type oxide BaFe<sub>0.85</sub>Y<sub>0.15</sub>O<sub>3–<em>δ</em></sub> (BFY) under various oxidation and protonation states. To do so, we introduce an alternative analytical method, which is capable of direct proton detection in perovskites and well-suited for in-situ quantification: Laser-induced breakdown spectroscopy (LIBS). This technique analyses characteristic emissions from the plasma generated by UV-laser irradiation of the material. Validation of results involved gravimetry and Fourier-transform infrared spectroscopy (FT-IR). While gravimetry was used to determine the proton concentration under special experimental conditions, FT-IR spectroscopy was used to distinguish the protons – located in the perovskite structure in the form of <span><math><msubsup><mfenced><mi>OH</mi></mfenced><mi>O</mi><mo>•</mo></msubsup></math></span> point defects - from molecular water (e.g. at the surface). The results underscore the reliability of LIBS for the quantification of bulk protons in perovskite-type oxides, positioning it as a valuable alternative to conventional methods.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117033"},"PeriodicalIF":3.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322997","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}

引用次数: 0

Influence of succinonitrile on structural, thermal, electrochemical and optical properties of sodium-ion conducting PVdF-HFP based gel polymer electrolyte membranes 丁二腈对钠离子导电PVdF-HFP基凝胶聚合物电解质膜结构、热、电化学和光学性能的影响

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-14 DOI: 10.1016/j.ssi.2025.117045

Vishalkumar Oli , M. Initha , Vaishali Madhani , Kalappa Prashantha , Neeladri Das , Sujeet Kumar Chaurasia , Kuldeep Mishra , Rahul Gera , Jehova Jire L. Hmar , Deepak Kumar

{"title":"Influence of succinonitrile on structural, thermal, electrochemical and optical properties of sodium-ion conducting PVdF-HFP based gel polymer electrolyte membranes","authors":"Vishalkumar Oli , M. Initha , Vaishali Madhani , Kalappa Prashantha , Neeladri Das , Sujeet Kumar Chaurasia , Kuldeep Mishra , Rahul Gera , Jehova Jire L. Hmar , Deepak Kumar","doi":"10.1016/j.ssi.2025.117045","DOIUrl":"10.1016/j.ssi.2025.117045","url":null,"abstract":"<div><div>A novel sodium (Na)-ion conducting gel polymer electrolyte <em>co</em>mposed of poly(vinylidine-fluoride-co-hexafluoropropylene) (PVdF-HFP) complexed with sodium tetrafluoro-borate (NaBF<sub>4</sub>) and ethylene carbonate (EC)-propylene carbonate (PC) as a co-solvent, coupled via differing fractions of a non-ionic plastic crystal succinonitrile (SN) are developed and studied. X-ray diffraction and Fourier transform infra-red studies identifies significant structural alterations in terms of reduced crystallinity and the interactions among the polymeric components on incorporation of SN. The thermogravimetric and differential scanning calorimetry investigations indicate that the synthesized electrolytes experience a weight reduction of less than 5 % up to 100 °C and maintain the gel stage up to 125 °C, respectively. The elevated polarity and rotational disorder of the SN molecules in the plastic-crystalline phase facilitate the improvement of ionic conductivity in the P<em>V</em>dF-HFP/EC-PC/NaBF<sub>4</sub> complex system, achieving an optimal RT ionic conductivity of about 4.55 × 10<sup>−3</sup> S cm<sup>−1</sup> with the incorporation of 50 wt% of SN with purely ionic character. The working voltage range for the optimized electrolyte specimen was 4.9 V. The UV–Vis studies demonstrate the enhancement in absorbance and the reduction of the optical band gap by adding SN up to 50 wt%. The experimental results of the contact angle indicated an improvement in hydrophobicity with higher concentrations of SN across the PVdF-HFP matrix. The operational attributes for the SN-incorporated polymeric system suggest their possible use as electrolytes in electrochemical energy storage applications.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117045"},"PeriodicalIF":3.3,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323000","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}

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Conductivity of 2-adamantanone with lithium bis(trifluoromethanesulfonyl)imide: Impact of residual solvent and temperature 2-金刚烷酮与二（三氟甲烷磺酰）亚胺锂的电导率：残余溶剂和温度的影响

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-13 DOI: 10.1016/j.ssi.2025.117043

Joshua Budde, Ingo Bardenhagen, Julian Schwenzel

{"title":"Conductivity of 2-adamantanone with lithium bis(trifluoromethanesulfonyl)imide: Impact of residual solvent and temperature","authors":"Joshua Budde, Ingo Bardenhagen, Julian Schwenzel","doi":"10.1016/j.ssi.2025.117043","DOIUrl":"10.1016/j.ssi.2025.117043","url":null,"abstract":"<div><div>This study investigates the ionic conductivity of a mixture comprising 2-adamantanone and lithium bis(trifluoromethanesulfonyl)imide, with focus on the impact of temperature and residual tetrahydrofuran. Previous investigations have shown that the plastic crystal 2-adamantanone, when paired with lithium bis(trifluoromethanesulfonyl)imide, exhibits an ionic conductivity of 1.2 × 10<sup>−4</sup> S cm<sup>−1</sup> and a considerable oxidation potential of 5.1 V. Nonetheless, the influence of any residual processing solvent on the ionic conductivity is not yet fully understood. The Design of Experiments methodology was utilized to analyze a broad spectrum of potential compositions of 2-adamantanone, lithium bis(trifluoromethanesulfonyl)imide, and tetrahydrofuran. We measured the ionic conductivity of the samples using electrochemical impedance spectroscopy and conducted structural studies via differential scanning calorimetry, Fourier transform infrared spectroscopy, X-ray diffraction and solid-state NMR. Our findings indicate that the leftover amount of THF enhances ionic conductivity more strongly than the molarity. Moreover, compared to crystallization from the solvent, ionic conductivity increases by over an order of magnitude following recrystallization from the melt. We suggest that the residual solvent is integrated into the crystal structure of the 2-adamantanone, thereby increasing the free volume and facilitating lithium-ion transport. At elevated temperatures, the optimized formulation transforms from a solid to a wax-like consistency, functioning as a solid electrolyte with a high ionic conductivity of 2.6 × 10<sup>−4</sup> S cm<sup>−1</sup> at room temperature, making it a promising candidate for electrolyte applications.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117043"},"PeriodicalIF":3.3,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322999","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}

引用次数: 0

Poly(ionic liquid)/expanded pore NH2-UiO-66 composite solid-state electrolyte for high-performance solid-state lithium-ion batteries 高性能固态锂离子电池用聚（离子液体）/膨胀孔NH2-UiO-66复合固态电解质

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-13 DOI: 10.1016/j.ssi.2025.117040

Yang Zhang , Donghao Zhang , Jian Zhang, Xin Li, Xiaoling Hu, Ping Guan, Xin Wang

{"title":"Poly(ionic liquid)/expanded pore NH2-UiO-66 composite solid-state electrolyte for high-performance solid-state lithium-ion batteries","authors":"Yang Zhang , Donghao Zhang , Jian Zhang, Xin Li, Xiaoling Hu, Ping Guan, Xin Wang","doi":"10.1016/j.ssi.2025.117040","DOIUrl":"10.1016/j.ssi.2025.117040","url":null,"abstract":"<div><div>The development of high-performance solid electrolytes is essential for advancing ion batteries. This research introduces a novel approach for the simultaneous construction of poly(ionic liquid) and ionic conductors, creating a synergistic system that integrates a new polycationic ionic liquid matrix with ionic liquid-modified ionic conductors (Li-IL@PA-UiO-66-NH<sub>2</sub>). This method markedly improves the interfacial compatibility between the polymer substrate and the functional filler. The filler enhances the composite electrolyte, achieving a higher transference number and ionic conductivity documented in recent studies, alongside improved voltage stability. We engineer and manufacture poly(1-vinyl-3-dodecylimidazole) bis(trifluoromethanesulfonimide) ([P(VIM-R)]TFSI) ionic liquids, which are subsequently utilized as the primary polymer, resulting in the formation of a poly(ionic liquid) solid-state electrolyte (P-GPE). Subsequently, we integrate it with the Li-IL@PA-UiO-66-NH<sub>2</sub> ionic conductor to formulate a poly(ionic liquid) composite solid-state electrolyte (P-CPE). The findings indicate that the ionic conductivity of P-CPE at 30 °C is 2.35 × 10<sup>−4</sup> S cm<sup>−1</sup>, with a transference number of 0.77. This value is 1.85 and 1.33 times higher than that of P-GPE, and the material can function safely up to 5 V. This study emphasizes the role of solid-state electrolytes in advancing the development of next-generation solid-state batteries.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117040"},"PeriodicalIF":3.3,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322553","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}

引用次数: 0

Enhancement of oxide ion and proton conductivity in Sr3-xCaxV2O8 palmierites through tuning of the crystal structure 通过调整晶体结构增强Sr3-xCaxV2O8棕榈石中氧化离子和质子的电导率

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-11 DOI: 10.1016/j.ssi.2025.117041

Sophie G. Martin , Oscar J.B. Ballantyne , Clemens Ritter , Ying Zhou , Frazer N. Forrester , James A. Dawson , Abbie C. Mclaughlin

{"title":"Enhancement of oxide ion and proton conductivity in Sr3-xCaxV2O8 palmierites through tuning of the crystal structure","authors":"Sophie G. Martin , Oscar J.B. Ballantyne , Clemens Ritter , Ying Zhou , Frazer N. Forrester , James A. Dawson , Abbie C. Mclaughlin","doi":"10.1016/j.ssi.2025.117041","DOIUrl":"10.1016/j.ssi.2025.117041","url":null,"abstract":"<div><div>Sizeable oxide ion and proton conductivity have recently been reported in <em>A</em><sub>3</sub>V<sub>2</sub>O<sub>8</sub> (<em>A</em> = Ba, Sr) palmierites. The solid solution Sr<sub>3-<em>x</em></sub>Ca<sub><em>x</em></sub>V<sub>2</sub>O<sub>8</sub> (<em>x</em> = 0.0–0.2) has been synthesised and investigated by electrochemical characterisation and atomistic modelling, revealing key insights into the design principles for enhancing oxide and proton conduction in palmierites. Neutron diffraction data shows that at 20 °C there is a reduction in crystal symmetry from <span><math><mi>R</mi><mover><mn>3</mn><mo>¯</mo></mover><mi>m</mi></math></span> to <span><math><mi>C</mi><mn>2</mn><mo>/</mo><mi>c</mi></math></span> for <em>x</em> ≥ 0.05. Upon heating to 600 °C, <span><math><mi>R</mi><mover><mn>3</mn><mo>¯</mo></mover><mi>m</mi></math></span> symmetry is restored for all phases. An increase in both the oxide ion and proton conductivity are observed with Ca<sup>2+</sup> doping. The oxide ion conductivity scales with the magnitude of displacement of the V<sup>5+</sup> cation and V<img>O2 bond length.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117041"},"PeriodicalIF":3.3,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265179","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}

引用次数: 0

Investigation on electrochemical behavior and degradation mechanism of a reversible solid oxide cell operating at high current densities 高电流密度下可逆固体氧化物电池的电化学行为及降解机理研究

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-10 DOI: 10.1016/j.ssi.2025.117044

Haoshen Wang , Qing Shao , Yue Lu , Dun Jin , Fupeng Cheng , Chengzhi Guan , Zhi Li , Guoping Xiao , Juncai Sun , Jian-Qiang Wang

{"title":"Investigation on electrochemical behavior and degradation mechanism of a reversible solid oxide cell operating at high current densities","authors":"Haoshen Wang , Qing Shao , Yue Lu , Dun Jin , Fupeng Cheng , Chengzhi Guan , Zhi Li , Guoping Xiao , Juncai Sun , Jian-Qiang Wang","doi":"10.1016/j.ssi.2025.117044","DOIUrl":"10.1016/j.ssi.2025.117044","url":null,"abstract":"<div><div>Reversible solid oxide cell have significant potential for storing energy from intermittent renewable sources. However, the current densities must be increased to improve the energy conversion efficiency and reduce system costs. In this study, a fuel electrode-supported cell with an effective area of 16 cm<sup>2</sup> was operated for 288 h, switching between solid oxide fuel cell and solid oxide electrolysis cell modes at the current densities of ±1.88 A cm<sup>−2</sup>. The electrochemical impedance spectroscopy collected at the open-circuit voltage were analyzed using the distribution of relaxation times and equivalent circuit modeling methods to evaluate the contribution of each electrode process to degradation. The results demonstrated that charge transfer reactions in the fuel and oxygen electrodes were the primary cause of cell performance degradation. According to the post-test analysis, the primary degradation mechanisms are the migration of nickel from the active layer to support layer and the coarsening of nickel in the fuel electrode. Other degradation mechanisms included the segregation of strontium and valence fluctuations of cobalt, which acted synergistically to the oxygen electrode. At elevated current densities, the concurrent migration of nickel in the same direction reduced to a reduction in the triple-phase boundary, which could not be adequately compensated for. This phenomenon significantly impaired the cell performance.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"432 ","pages":"Article 117044"},"PeriodicalIF":3.3,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265176","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}

引用次数: 0

Highly conductive solid electrolytes in the PbF2-CaF2-KF system: mechanochemical synthesis, electrical properties, microstructure and stability PbF2-CaF2-KF体系中高导电性固体电解质：机械化学合成、电学性能、微观结构及稳定性

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2025-10-10 DOI: 10.1016/j.ssi.2025.117037

Qianlong Ji, Natalia A. Melnikova, Oleg V. Glumov, Igor V. Murin

引用次数: 0