Solid State Ionics最新文献

{"title":"Preparation of PEDOT:PSS/GO/CMC composite flexible electrodes via a vacuum filtration method and their application in flexible solid supercapacitors","authors":"Jing Chen,&nbsp;Xiaoqian Yan,&nbsp;Youliang Cheng,&nbsp;Changqing Fang,&nbsp;Yang Wang,&nbsp;Shuaikun Li,&nbsp;Yuhui Gao,&nbsp;Ruotong Zhi","doi":"10.1016/j.ssi.2025.116935","DOIUrl":"10.1016/j.ssi.2025.116935","url":null,"abstract":"<div><div>Flexible all-solid-state supercapacitors have found widespread application in advanced energy storage systems for wearable electronics, portable devices, and next-generation transportation platforms, among others. Nevertheless, developing environmentally benign electrode materials with long-term operational stability remains a critical challenge in this field. Herein, ternary PEDOT:PSS/GO/CMC (PPGC) composite electrodes fabricated through a facile vacuum filtration strategy, where carboxymethyl cellulose (CMC) serves as a biodegradable substrate, while graphene oxide (GO) and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT: PSS) function as synergistic active components. Subsequently, flexible symmetric all-solid-state supercapacitors with a sandwich structure were assembled using PVA-KOH as solid-state electrolyte. Electrochemical performances of composite electrodes and flexible all-solid-state supercapacitors were investigated. The results showed that the area specific capacitance of PPGC composite electrode was up to 682 mF/cm² when the mass ratio of CMC: GO: (PEDOT:PSS) was 1:4:8. The maximum area specific capacitance of obtained flexible supercapacitor was 108.5 mF/cm², and 79 % of the initial specific capacitance remained after 2000 charge-discharge cycles. Interestingly, the specific capacitance remained 92 % of the initial specific capacitance after bending 200 times. Therefore, the as-prepared PPGC composite electrodes exhibit potential applications in the flexible all-solid-state supercapacitors and electron devices.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116935"},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270392","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":"Tantalum and niobium co-doped BaCo0.7Fe0.3O3-δ as a high performance cathode for intermediate temperature solid oxide fuel cells","authors":"Lanlan Guo ,&nbsp;Zhigang Chen ,&nbsp;Hongxiang Chen ,&nbsp;Chunling Lu ,&nbsp;Biao Wang ,&nbsp;Dongchao Qiu ,&nbsp;Bingbing Niu","doi":"10.1016/j.ssi.2025.116922","DOIUrl":"10.1016/j.ssi.2025.116922","url":null,"abstract":"<div><div>Solid oxide fuel cells (SOFCs) are environmentally friendly energy conversion devices with low pollution emissions and high conversion efficiency. The cathode is a critical component of SOFCs, playing a vital role in improving the energy conversion efficiency. In this study, perovskite oxide BaCo_0.7Fe_0.1Nb_0.1Ta_0.1O_3-δ (BCFNT) was synthesized via solid–state reaction with simultaneous substitution of Nb and Ta at the B-site to optimize the electrochemical performance. The properties of BCFNT as cathode were investigated by density function theory (DFT), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), fuel cell performance, and oxygen reduction reaction kinetics. DFT results indicate that the total oxygen vacancy energy of BCFNT is 1.686 eV and BaCo_0.7Fe_0.3O_3-δ (BCF) is 2.5154 eV, and the BCFNT exhibits better occupancy rate at the Fermi level. This indicate that Nb and Ta co-doping significantly reduces the oxygen vacancy energy and improves good oxygen reduction reaction (ORR) activity. XRD pattern confirm that BCFNT forms a more stable cubic phase structure compared with the hexagonal phase of BCF. Oxygen partial pressure results show that the transfer of oxygen ions at triple-phase boundary is the rate-limiting step for the ORR. At 800 °C, the polarization resistance of BCFNT on La_0.9Sr_0.1Ga_0.83Mg_0.17O_3-δ (LSGM) electrolyte is 0.0126 Ω cm², 39.13 % lower than that of parent BaCo_0.7Fe_0.3O_3-δ (0.0207 Ω cm²). At 800 °C, the BCFNT cathode on LSGM electrolyte delivers a peak power density of 1107 mW cm⁻², significantly outperforming the 889 mW cm⁻² of the BaCo_0.7Fe_0.3O_3-δ cathode, with a relative improvement of 24.5 %. Nb and Ta co-doping BCFNT improves the electrochemical performance and structural stability of electrode material.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116922"},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261868","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":"Improvement of magnetoelectric properties of PVDF based flexible composite films based on topography engineering","authors":"Xiaoling Deng ,&nbsp;Shiqi Chen ,&nbsp;Weihao Wu ,&nbsp;Guiyun Sun ,&nbsp;Rongli Gao ,&nbsp;Gang Meng ,&nbsp;Wei Cai ,&nbsp;Chunlin Fu ,&nbsp;Songlin Chen","doi":"10.1016/j.ssi.2025.116934","DOIUrl":"10.1016/j.ssi.2025.116934","url":null,"abstract":"<div><div>In this study, cobalt ferrite (CoFe₂O₄, CFO) powders with different morphologies were synthesized through hydrothermal regulation of glycol content and mineralizing agents within a solvent system. Subsequently, the CFO/PVDF composite films were prepared through a casting techniquethe, the effects of CFO powders with varying morphologies on the magnetoelectric properties of PVDF based flexible composite membranes were investigated. The experimental results indicate that the morphology of CFO powder significantly influences the magnetoelectric interaction behavior of the composite films. XRD and SEM analyses confirmed that CFO powders with distinct morphologies were successfully integrated into the PVDF matrix. Furthermore, the distribution and morphology of the CFO phase within the composite film were closely related to the structural characteristics of the respective CFO powders. Additional FTIR analysis revealed that <em>β</em>-phase was predominant in terms of ferroelectricity within these composite films. Notably, strip-shaped CFO powder facilitated an enhancement in <em>β</em>-phase formation in PVDF matrices. Magnetoelectric performance tests demonstrated that CFO/PVDF composite films exhibited remarkable magnetoelectric coupling effects when influenced by variously shaped CFO powders. In particular, composites incorporating strip-shaped CFO powder displayed pronounced magnetoelectric properties, highlighting their potential applications in flexible wearable sensors as well as energy harvesting and conversion devices. This research provides both theoretical insights and technical support for designing and applying flexible magnetoelectric composite films.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116934"},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261869","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 on the liquid-phase oxidation preparation of nickel-manganese composite oxides and their performance in high-voltage LiNi0.5Mn1.5O4 synthesis","authors":"Xingjie Zhou ,&nbsp;Haifeng Wang ,&nbsp;Jiawei Wang ,&nbsp;Hao Wang ,&nbsp;Dehua Ma ,&nbsp;Zhengqing Pei ,&nbsp;Ju Lu ,&nbsp;Kexin Zheng","doi":"10.1016/j.ssi.2025.116914","DOIUrl":"10.1016/j.ssi.2025.116914","url":null,"abstract":"<div><div>Due to its high operating voltage, high safety, and low cost, spinel-type lithium nickel manganese oxide(LiNi_0.5Mn_1.5O₄) has become a research hotspot in the field of lithium-ion battery cathode materials in recent years. In this study, a new lithium nickel manganese oxide precursor, a nickel‑manganese composite oxide, was prepared using a liquid-phase oxidation method, and the cathode material was synthesized through high-temperature calcination. The effects of different raw material ratios on the preparation of LiNi_0.5Mn_1.5O₄ and their mechanisms were investigated. Considering that acetylene black tends to undergo thermal decomposition and electrochemical reactions in high voltage systems, leading to degradation and performance decline, Super C65 was used as a conductive agent instead of acetylene black to achieve better electrochemical performance. The experimental results indicate that when the Ni/Mn molar ratio is 1:2.5, the resulting nickel‑manganese composite oxide exhibits good crystallinity and a Fd-3 m space group structure with uniform particle dispersion and weak agglomeration. When mixed with LiOH and subjected to high-temperature calcination, with a Li/M molar ratio (M = Mn + Ni) of 0.51, the formation of the Li_xNi_1-xO impurity phase and the polarization of the material were significantly improved. The prepared LiNi_0.5Mn_1.5O₄ has uniform particle size, well-defined octahedral morphology, and pure phase characteristics. At a current density of 0.2C, the initial discharge specific capacity reaches 135 mAh/g and remains at 118 mAh/g after 200 cycles. After replacing acetylene black with Super C65, the initial discharge specific capacity of LiNi_0.5Mn_1.5O₄ at 0.2C increased to 140 mAh/g, with a discharge specific capacity of 122 mAh/g after 200 cycles, and the electrochemical impedance decreased from 304 Ω to 266 Ω. This improvement is attributed to the smaller particle size of Super C65, which can embed between the spinel material particles to form a good conductive network, increase the lattice parameters of the disordered space cluster structure, provide more diffusion paths for ions, facilitate the rapid change of element valence states, and thereby demonstrate higher electronic conductivity. Although the cycling retention slightly decreased, the overall electrochemical performance was enhanced.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116914"},"PeriodicalIF":3.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239939","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":"Effects of material fabrication and current collector on the total conductivity of doped barium zirconates","authors":"Yewon Shin ,&nbsp;Nikolaos Bonanos ,&nbsp;Sandrine Ricote","doi":"10.1016/j.ssi.2025.116923","DOIUrl":"10.1016/j.ssi.2025.116923","url":null,"abstract":"<div><div>Doped barium zirconates (BaZrO₃) are predominantly employed in protonic ceramic fuel cells and electrolysis cells. Electrochemical impedance spectroscopy (EIS) has been utilized to determine the total conductivity (<em>σ</em>_tot) of these materials. However, significant variations in <em>σ</em>_tot of doped BaZrO₃ protonic ceramic electrolytes have been observed depending on materials fabrication processes and current-collecting materials. This study reviews how the fabrication process can influence the microstructure and physical characteristics of the final sintered doped BaZrO₃ electrolytes, consequently their <em>σ</em>_tot. Symmetric cells were fabricated using BaZr_0.8Y_0.2O_3-δ (BZY20) electrolyte with different current-collecting materials (Pt, Ag, and Ni) as electrodes, and varying <em>σ</em>_tot values were measured. The results were analyzed to identify primary and secondary factors contributing to the observed variations. Finally, this study proposes pathways to minimize the discrepancies in <em>σ</em>_tot arising from materials fabrications and current-collecting materials.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116923"},"PeriodicalIF":3.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239938","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 bismuth substitution on structural, electrical and dielectric properties of barium zinc niobates","authors":"Amanda Ndubuisi ,&nbsp;Venkataraman Thangadurai","doi":"10.1016/j.ssi.2025.116921","DOIUrl":"10.1016/j.ssi.2025.116921","url":null,"abstract":"<div><div>Herein, we report the effects of bismuth substitution on the structural, electrical, and dielectric properties of BaZn_0.33Nb_{0.67-<em>x</em>}Bi_<em>x</em>O_3-δ (BZNBi, <em>x</em> = 0, 0.017, 0.03, 0.05). BZNBi perovskite oxides crystallized in a cubic <em>Pm</em>3̅<em>m</em> symmetry, however, a minor secondary phase was found in <em>x</em> = 0.03, and 0.05 samples. An expansion of the unit cell was observed with increasing bismuth concentration, indicating a linear correlation between the lattice constant and composition. The surface microstructure of the BZNBi pellets revealed that bismuth substitution enhanced densification, except in samples with significant impurity content. The introduction of bismuth increased the electrical conductivity from <span><math><mn>2.3</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>8</mn></mrow></msup><mspace></mspace><mi>S</mi><mspace></mspace><msup><mi>cm</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> in BZN to <span><math><mn>3.1</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>2</mn></mrow></msup><mspace></mspace><mi>S</mi><mspace></mspace><msup><mi>cm</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> in BZNBi 0.05 at 600 °C in air. At 1 MHz and 600 °C, the dielectric constant also increased from 28 in BZN to 47 in BZNBi 0.017, indicating the potential of bismuth doping in improving the electrical and dielectric properties of BZN.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116921"},"PeriodicalIF":3.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240069","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":"Fast lithium-ion diffusion in pyrochlore-type oxyfluoride Li1.25La0.58Nb2O6F","authors":"Naoaki Kuwata ,&nbsp;Gen Hasegawa ,&nbsp;Sihao Xing ,&nbsp;Kenjiro Hashi ,&nbsp;Yoshitaka Matsushita ,&nbsp;Randy Jalem ,&nbsp;Kazunori Takada ,&nbsp;Hitoshi Onodera ,&nbsp;Shuhei Yoshida","doi":"10.1016/j.ssi.2025.116924","DOIUrl":"10.1016/j.ssi.2025.116924","url":null,"abstract":"<div><div>Fast lithium-ion conductors with oxide frameworks are key materials for high performance solid-state rechargeable batteries. This study reveals fast Li⁺ ion diffusion in the recently discovered pyrochlore-type lithium lanthanum niobium oxyfluoride, Li_{2–<em>x</em>}La_{(1+<em>x</em>)/3}□_{(2<em>x</em>–1)/3}Nb₂O₆F (□ = vacancy), using pulsed-field gradient nuclear magnetic resonance (NMR) and impedance measurements. These analyses confirm that fast Li⁺ ion diffusion is the origin of the high ionic conductivity. Moreover, ⁷Li and ¹⁹F NMR data suggest that local disorder at the Li⁺ ion sites facilitate fast diffusion. Chemical shifts of the ¹⁹F NMR can be explained by the number of La, Li and vacancies around fluorine. The Arrhenius plot exhibits a slight bending at approximately 200 K. The thermal expansion coefficient also changes from negative to positive at 200 K. These results suggest that Li⁺ ions in pyrochlore-type oxyfluorides undergo an order–disorder phase transition. The insights provided by this study into the mechanism of fast Li⁺ ion diffusion in pyrochlore-type oxyfluorides pave the way for fabricating solid electrolytes with improved performance over conventional solid electrolytes.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116924"},"PeriodicalIF":3.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239940","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":"Tuning lithium diffusion by anionic substitution in a trigonal halide superionic conductor","authors":"Joohyeon Noh ,&nbsp;Mireu Kim ,&nbsp;Seungju Yu ,&nbsp;Wonju Kim ,&nbsp;Jaekyun Yoo ,&nbsp;Sunyoung Lee ,&nbsp;Sangwook Han ,&nbsp;Daero Won ,&nbsp;Chanwoong Park ,&nbsp;Geunji Choi ,&nbsp;Kisuk Kang","doi":"10.1016/j.ssi.2025.116920","DOIUrl":"10.1016/j.ssi.2025.116920","url":null,"abstract":"<div><div>Halide solid electrolytes have emerged as a key enabler for solid-state batteries, offering exceptional electrochemical and mechanical compatibility with cathodes. Among them, Li₂ZrCl₆ stands out as a cost-effective alternative, unlike most reported halide electrolytes that rely on scarce and expensive elements such as Y, Er, Ho, Sc and Yb. However, its relatively low ionic conductivity (∼10⁻⁴ S cm⁻¹) remains a critical limitation for practical applications. In this study, we employ a theoretical approach to unravel the lithium diffusion mechanisms in trigonal Li₂ZrCl₆ and systematically evaluate the effect of partial anion substitution on ionic transport. Our findings reveal that even minimal amount of anion (<em>e.g.</em>, sulfur) substitution can drastically enhance lithium percolation pathways, significantly accelerating lithium diffusion kinetics. This enhancement stems from a unique in-plane diffusion mechanism, where electrostatically restricted vacant sites at pathway intersections – previously inaccessible – become activated through anion substitution. In particular, sulfur mitigates cationic repulsion and enlarges intermediate sites at these intersections, unlocking multiple new diffusion pathways. Guided by this insight, we experimentally demonstrate that even a minimal level of sulfur substitution (∼3 %) increases ionic conductivity by a factor of three compared with pristine Li₂ZrCl₆. Further tuning achieves a remarkable conductivity of ∼1.33 <span><math><mo>×</mo></math></span> 10⁻³ S cm⁻¹ at 25 °C, the highest reported for Li₂ZrCl₆ electrolytes <span><math><mo>≥</mo></math></span> 90 % Zr content. These findings highlight the structural adaptability of trigonal Li₂ZrCl₆ for anion substitution, presenting a new and effective strategy to achieve high ionic conductivity in cost-effective halide solid electrolytes.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116920"},"PeriodicalIF":3.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220984","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 phosphorus and fluorine on sinterability, c-axis orientation, and ionic conductivity of lanthanum silicate oxyapatite","authors":"Shigekazu Hidaka ,&nbsp;Takahisa Yamamoto","doi":"10.1016/j.ssi.2025.116919","DOIUrl":"10.1016/j.ssi.2025.116919","url":null,"abstract":"<div><div>Lowering the operating temperature of solid oxide cells (SOCs) is a key challenge for their widespread use. Lanthanum silicate oxyapatite (LSO) is a promising electrolyte material owing to its high ionic conductivity along the <em>c</em>-axis direction. The application of LSO is hindered by its low sinterability and the requirement for controlling <em>c</em>-axis orientation. In this study, we investigated the effects of phosphorus and fluorine as sintering dopants on the sinterability, microstructure, and ionic conductivity of LSO. Dense LSO pellets with a relative density of over 95 % were successfully fabricated at sintering temperatures of 1550 °C for fluorine-added LSO and 1700 °C for phosphorus-added LSO. Phosphorus-added LSO exhibited characteristic columnar grain growth along the <em>c</em>-axis direction, resulting in higher ionic conductivities under approximately 700 °C compared with that of yttria-stabilized zirconia. These results provide valuable guidance for lowering the operating temperatures of SOCs.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"428 ","pages":"Article 116919"},"PeriodicalIF":3.0,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213504","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":"Optical evaluation of Ni, Fe and Co impurity content in Y-doped barium zirconate","authors":"Kunihiko Shizume,&nbsp;Naoyuki Hatada,&nbsp;Tetsuya Uda","doi":"10.1016/j.ssi.2025.116878","DOIUrl":"10.1016/j.ssi.2025.116878","url":null,"abstract":"<div><div>Y-doped BaZrO₃ (BZY) is a promising candidate for the electrolyte material of proton conducting fuel cell (PCFC). The impurity concentrations of Ni, Co, and Fe are often of interest in studies of cell processing because the electrochemical performances and the sinterability remarkably depend on the concentrations. This work proposes a simple technique to quantify the dissolved Fe, Co, and Ni in BZY sintered bodies by evaluating the color in the <em>L</em>^<em>⁎</em><em>a</em>^<em>⁎</em><em>b</em>^<em>⁎</em> color space. Colorimetric measurements revealed a roughly linear relationship between <em>L</em>^<em>⁎</em> and the logarithm of Fe, Co, and Ni concentrations in the dilute range from 0.001 to 0.1 at.%, providing an empirical calibration curve. <em>L</em>^<em>⁎</em> values also depend on the raw BZY powders used as the starting material and the sintering procedure, resulting in variations in relative density, Ba deficiency and excess of the sintered body. Therefore, when applied to a series of sintered bodies with consistent starting material and same processes, this calibration curve is reliable.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"427 ","pages":"Article 116878"},"PeriodicalIF":3.0,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178421","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}