Solid State Ionics最新文献_第3页

High-performance quaternized polysulfone and branched polyethyleneimine anion exchange membranes 高性能季铵化聚砜和支化聚乙烯亚胺阴离子交换膜

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-15 Epub Date: 2025-12-17 DOI: 10.1016/j.ssi.2025.117100

Siying Li, Yang Zhang, Lulu Wang, Fan Zhang, Jilin Wang

{"title":"High-performance quaternized polysulfone and branched polyethyleneimine anion exchange membranes","authors":"Siying Li, Yang Zhang, Lulu Wang, Fan Zhang, Jilin Wang","doi":"10.1016/j.ssi.2025.117100","DOIUrl":"10.1016/j.ssi.2025.117100","url":null,"abstract":"<div><div>To prepare anion exchange membranes (AEMs) that exhibit both high conductivity and robust alkaline stability, in this work, chloromethylated polysulfone (CMPSf) was cross-linked with branched polyethyleneimine (BPEI) and quaternized, producing a series of AEMs featuring regionally dense ion clusters. Systematic adjustment the length of the quaternizing reagent enabled the construction of long-range, interconnected ion transport channels, leading to an improved balance between OH− conductivity and dimensional stability. The QPSf-QBPEI8 AEM, which contains hydrophobic chains with eight alkyl carbons, demonstrated a conductivity of 114.96 mS·cm−1 with swelling ratio of 43.5 % at 80 °C. The use of quaternized polyethyleneimine reduces the need for extensive backbone modification. Furthermore, the steric hindrance offered by the hydrophobic chains significantly enhances the alkaline stability of the membranes (84.6 % conductivity retention after 30 days in 6 M KOH). Additionally, the single cell configured with QPSf-QBPEI8 AEM achieved a maximum power density of 502.12 mW cm−2 at 80 °C. These results indicate that QPSf-QBPEI8 exhibits a promising application potential in fuel cells.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"435 ","pages":"Article 117100"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765747","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

A compact cell for electrochemical investigations of solid-state materials 用于固态材料电化学研究的小型电池

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-15 Epub Date: 2025-12-27 DOI: 10.1016/j.ssi.2025.117106

Samuel Merk , Jan Meyer , David Müller , Thomas F. Fässler

{"title":"A compact cell for electrochemical investigations of solid-state materials","authors":"Samuel Merk , Jan Meyer , David Müller , Thomas F. Fässler","doi":"10.1016/j.ssi.2025.117106","DOIUrl":"10.1016/j.ssi.2025.117106","url":null,"abstract":"<div><div>Solid electrolytes are a key feature of all-solid-state batteries, which represent advanced energy storage systems. The investigation of electrochemical properties of promising materials is essential for the development of new compounds. Herein, we report a simple and compact polyether ether ketone (PEEK)-based cell for the analysis of air and moisture sensitive solid electrolytes, including brittle microcrystalline powders or tapes. The cell exhibits low intrinsic capacitance, enabling impedance spectroscopy across the full frequency range without interfering features and applicable for a large temperature range from −70 °C to 80 °C. Controlled fabrication and measurement pressures improve the reproducibility of impedance measurements. Using polytetrafluoroethylene samples of varying thickness, this stray capacitance is measured and determined. Temperature-dependent electrochemical impedance spectroscopy of Li6PS5Cl/hydrogenated nitrile butadiene rubber (HNBR) sheets, conducted between −70 °C and 80 °C, demonstrates the cell durability and the high reproducibility of impedance measurements. Furthermore, the airtightness and experimental consistency were maintained even after 250 h of operation. Finally, we highlight the importance of low intrinsic capacitance by successfully resolving the bulk and grain contributions in Li6PS5Cl.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"435 ","pages":"Article 117106"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881420","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

Anion engineering enhances the electrochemical performance of Li7P3S11 solid electrolyte 阴离子工程提高了Li7P3S11固体电解质的电化学性能

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-15 Epub Date: 2025-12-24 DOI: 10.1016/j.ssi.2025.117104

D. Narsimulu, Ramkumar Balasubramaniam, Kwang-Sun Ryu

{"title":"Anion engineering enhances the electrochemical performance of Li7P3S11 solid electrolyte","authors":"D. Narsimulu, Ramkumar Balasubramaniam, Kwang-Sun Ryu","doi":"10.1016/j.ssi.2025.117104","DOIUrl":"10.1016/j.ssi.2025.117104","url":null,"abstract":"<div><div>The Li7P3S11 sulfur solid electrolyte is a promising candidate for developing safe and high-performance all solid-state lithium-ion batteries (ASSLIBs). Air-sensitivity and poor electrode/electrolyte interfacial compatibility remain major bottlenecks for ASSLIBs. Despite the use of various strategies to address these issues, a highly effective solution is still required for ASSLIBs. For the first time, selenium (Se) anion is introduced as a dopant for the Li7P3S11-type sulfide electrolyte, which can simultaneously enhance Li-ion conductivity and lower the interfacial resistance between the NCM811 cathode and the electrolyte. A novel series of Li7P3S11-xSex sulfur SEs (x = 0, 0.025, 0.05, 0.075, 0.1, 0.125, & 0.15) was synthesized by a high energy ball milling method, and the Li7P3S10.9Se0.1 SEs demonstrated an excellent Li-ion conductivity of 2.48 mS cm−1 at 25 °C. XRD data and EDS mapping images confirm successful Se doping, which contributes to lattice expansion and improves Li-ion conductivity of the electrolyte. Notably, Se substitution at S sites significantly improves the moisture stability of the newly developed sulfide solid electrolyte. Furthermore, Li plating/stripping experiments show that Li7P3S10.9Se0.1 provides improved interfacial compatibility with lithium metal. Consequently, the assembled Li-In/ Li7P3S10.9Se0.1/NCM811 solid state battery retained a high discharge capacity of 82 mAh g−1 at a 0.1C rate and exhibited superior capacity retention compared to the undoped solid state battery. The selenium (Se) anion doping approach presents a promising strategy to achieve high ionic conductivity, air stability, and improved electrode/electrolyte interfacial properties for high-performance ASSLIBs.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"435 ","pages":"Article 117104"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838301","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

Cost-effective low-toxicity hydrogel quasi-solid polymer electrolyte (QSPE) with a PEO-based hyperbranched polymer host 具有peo基超支化聚合物主体的低成本低毒性水凝胶准固体聚合物电解质（QSPE）

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-15 Epub Date: 2025-12-22 DOI: 10.1016/j.ssi.2025.117105

Maria Bolar , William T. Andrews , Zachariah Bess , Laura Bonsmann , Constantin Ciocanel , Cindy C. Browder

{"title":"Cost-effective low-toxicity hydrogel quasi-solid polymer electrolyte (QSPE) with a PEO-based hyperbranched polymer host","authors":"Maria Bolar , William T. Andrews , Zachariah Bess , Laura Bonsmann , Constantin Ciocanel , Cindy C. Browder","doi":"10.1016/j.ssi.2025.117105","DOIUrl":"10.1016/j.ssi.2025.117105","url":null,"abstract":"<div><div>The drive for safer and longer-lasting power storage devices has centered on the development of solid electrolytes. Our group has developed a PEO-based quasi-solid polymer electrolyte (QSPE) that utilizes a hyperbranched polymer host, generated by in situ polymerization, that imparts mechanical strength while maintaining the amorphous character required for electrolyte conductivity. In this report, a LiCl-in-H2O QSPE was prepared and characterized. By replacing the traditional QSPE carbonate plasticizer with water, the use of lower-cost, reduced-toxicity electrolytic salts is realized, leading to a safer hydrogel electrolyte. The LiCl-in-H2O QSPE exhibited competitive room-temperature bulk conductivity (5.5 × 10−4 S/cm), with mechanical strength (0.40 MPa shear storage modulus) suitable for flexible electronics. Notably, the LiCl-in-H2O QSPE has a lower cost ($0.60 per g) and acute toxicity estimate (2120 mg/kg) relative to traditional formulations. In structural supercapacitors, the hydrogel QSPE enables specific capacitance 23.11 mF/g of and energy density of 2.05 × 10−3 Wh/kg. This work validates the combination of a hyperbranched polymer host with an aqueous lithium salt as a promising and cost-effective strategy for development of safer, next-generation lithium-based energy storage devices.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"435 ","pages":"Article 117105"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838302","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

A comparative study of Zn, Ti, Mn and Cr-doped yttria stabilized zirconia (8YSZ) powders synthesized by a modified Pechini route for new solid oxide cell materials 改进Pechini法制备Zn、Ti、Mn和cr掺杂钇稳定氧化锆（8YSZ）粉体制备新型固体氧化物电池材料的比较研究

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-01 Epub Date: 2025-12-16 DOI: 10.1016/j.ssi.2025.117096

Laura Huc , Logane Malié , Sandrine Duluard , Emmanuelle Suard , Julien Vulliet , Christophe Tenailleau , Pascal Lenormand

引用次数: 0

First-principles elucidation of the effects of Al-doping on Li-ion diffusion in LiCoO2 al掺杂对LiCoO2中锂离子扩散影响的第一性原理解释

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-01 Epub Date: 2025-12-12 DOI: 10.1016/j.ssi.2025.117103

Jordan A. Barr , Scott P. Beckman , Brandon C. Wood , Liwen F. Wan

{"title":"First-principles elucidation of the effects of Al-doping on Li-ion diffusion in LiCoO2","authors":"Jordan A. Barr , Scott P. Beckman , Brandon C. Wood , Liwen F. Wan","doi":"10.1016/j.ssi.2025.117103","DOIUrl":"10.1016/j.ssi.2025.117103","url":null,"abstract":"<div><div>Al-doped garnet Li7La3Zr2O12 solid-electrolyte and LiCoO2 cathode are promising choices as catholyte materials in all solid-state Li batteries, however, interdiffusion of Al is commonly evident during high-temperature processing and electrochemical cycling. To address the impact of Al interdiffusion on Li+ transport properties in LiCoO2, we carried out a systematic evaluation of Al doping on Li+ diffusion barriers in LiCoO2 using first-principles based methods. Following the monovacancy diffusion mechanism, Al-doping (primarily at the Co site) is found to improve Li diffusion kinetics in the LiCoO2 lattice due to favorable CoO6 octahedral distortion experienced at the transition states. However, when considering the previously established dominant divacancy diffusion mechanism, slower Li diffusion is generally expected. In addition, a broad variation of Li diffusion barriers is observed upon Al doping, which suggests the system may suffer from non-uniform Li incorporation and diffusion that adversely affects its rate capacity during cycling. In summary, this work highlights, for the rational design of catholyte of all solid-state batteries, special attention may need to be paid to address the potential impact of non-intentional doping induced during processing on the overall electrochemical performance of the catholyte.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"434 ","pages":"Article 117103"},"PeriodicalIF":3.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748359","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

Resistance-based transmission-line model for O2 flux prediction in Gd0.1Ce0.9O2-δ–SrFe0.9Ti0.1O3-δ composite membranes Gd0.1Ce0.9O2-δ - srfe0.9 ti0.1 o3 -δ复合膜中O2通量预测的电阻在线传输模型

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-01 Epub Date: 2025-12-16 DOI: 10.1016/j.ssi.2025.117101

Darshilkumar N. Chhatrodiya , Sunil Kumar , Santanu De , Shobit Omar

{"title":"Resistance-based transmission-line model for O2 flux prediction in Gd0.1Ce0.9O2-δ–SrFe0.9Ti0.1O3-δ composite membranes","authors":"Darshilkumar N. Chhatrodiya , Sunil Kumar , Santanu De , Shobit Omar","doi":"10.1016/j.ssi.2025.117101","DOIUrl":"10.1016/j.ssi.2025.117101","url":null,"abstract":"<div><div>A transmission-line model is developed to predict the oxygen flux through ceramic-based mixed ionic–electronic conducting (MIEC) membranes for air separation. The model is derived from the oxygen vacancy continuity equation, incorporating surface reaction kinetics as a sink term, and yields an impedance expression analogous to the de Levie transmission-line model widely applied to porous SOFC electrodes. To validate this approach, a novel MIEC ceramic composite comprising 65 wt% Gd0.1Ce0.9O2-δ (GDC) and 35 wt% SrFe0.9Ti0.1O3-δ (SFTO) is synthesized. Symmetrical cells are fabricated using 65GDC–35SFTO electrodes with a zirconia electrolyte and a GDC buffer-layer. Electrochemical impedance spectroscopy (EIS) is performed across a temperature range of 600–950 °C under varying pO2, and the electrode response is simulated employing the transmission-line model to decouple surface exchange resistance, ionic diffusion resistance, and chemical capacitance. A dense MIEC membrane coated on both sides with a porous layer of 65GDC–35SFTO is tested for oxygen permeation under different pO2 gradients. An oxygen flux of 0.61 ml.cm-2.min-1 is achieved at 950 °C, which remains stable for over 200 h. Using the developed theoretical resistance model, the resistances of the porous and dense MIEC layers are evaluated, enabling a reliable prediction of the steady-state oxygen permeation flux.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"434 ","pages":"Article 117101"},"PeriodicalIF":3.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797675","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

Ion-dependent electrochemical behavior in shear-structured tungsten oxides 剪切结构钨氧化物中离子依赖的电化学行为

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-01 Epub Date: 2025-12-05 DOI: 10.1016/j.ssi.2025.117095

Vincenzo J. Musicó , Noah P. Holzapfel , Menghang Wang , Wan-Yu Tsai , Tatiana Proksch , Boris Kozinsky , Nina Balke , Veronica Augustyn

{"title":"Ion-dependent electrochemical behavior in shear-structured tungsten oxides","authors":"Vincenzo J. Musicó , Noah P. Holzapfel , Menghang Wang , Wan-Yu Tsai , Tatiana Proksch , Boris Kozinsky , Nina Balke , Veronica Augustyn","doi":"10.1016/j.ssi.2025.117095","DOIUrl":"10.1016/j.ssi.2025.117095","url":null,"abstract":"<div><div>The demand for high-energy and high-power energy storage devices motivates the search for electrode materials with both high capacity and fast ion transport. One class of materials that could achieve such performance are oxides containing crystallographic shear (CS) planes. Here, we compare the structural dynamics of tungsten trioxide (WO3) and its oxygen deficient, CS Magnéli phase (WO2.9) during electrochemical insertion of H+ and Li+ ions using a combined experimental and computational study. We found that WO3 inserts more H+ per formula unit than WO2.9 yet operando electrochemical atomic force microscopy shows more deformation in WO2.9 than WO3 per inserted H+. In contrast, WO2.9 accommodates ∼0.2 more Li+ per formula unit than WO3 and has higher Li+ diffusion and better rate capability. Operando electrochemical X-ray diffraction shows that Li+ insertion into WO2.9 leads to lattice contraction and 5 % volume change up to Li0.6WO2.9 followed by a zero-strain region up to Li1.4WO2.9. We find that the presence of CS planes, and its effect on octahedral tilting, lead to different outcomes depending on the inserting ion: while octahedral tilting and lack of CS planes promote H+ insertion into WO3, their absence in WO2.9 favor Li+ insertion. We propose that the presence of CS planes impart structural rigidity, enabling higher capacity, improved rate capability, and enhanced cyclability during Li+ insertion but remove favorable bridging oxygen sites for H+ insertion.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"434 ","pages":"Article 117095"},"PeriodicalIF":3.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692512","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

Determining the optimal operating conditions of SOFCs electrolytes based on evolution of their electronic transport number with temperature and oxygen partial pressure: A case study of the Ce0.9Gd0.1O2-δ electrolyte 基于电子输运数随温度和氧分压的变化确定SOFCs电解质的最佳工作条件——以Ce0.9Gd0.1O2-δ电解质为例

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-01 Epub Date: 2025-12-03 DOI: 10.1016/j.ssi.2025.117097

E. Bonnet , M.C. Steil , J. Fouletier , L. Gaillard , B. Rousseau , C. Jourde , J.-M. Bassat , P.-M. Geffroy

{"title":"Determining the optimal operating conditions of SOFCs electrolytes based on evolution of their electronic transport number with temperature and oxygen partial pressure: A case study of the Ce0.9Gd0.1O2-δ electrolyte","authors":"E. Bonnet , M.C. Steil , J. Fouletier , L. Gaillard , B. Rousseau , C. Jourde , J.-M. Bassat , P.-M. Geffroy","doi":"10.1016/j.ssi.2025.117097","DOIUrl":"10.1016/j.ssi.2025.117097","url":null,"abstract":"<div><div>Optimizing the performance of Solid Oxide Fuel Cells (SOFCs) or Solid Oxide Electrolysis Cells (SOECs) necessitates a thorough understanding of the electrolytes' transport properties under the device's operating conditions, whether through experimental data or established transport laws. This study investigates the electrical properties of Gd-doped ceria as a potential electrolyte material for SOFC applications. The electrical behavior of Gd-doped ceria was analyzed over a broad range of oxygen partial pressures (from 10−36 to 1 bar) and temperatures (200 °C to 900 °C) to establish the Patterson diagram, i.e., the variation of the total electrical conductivity as a function of the oxygen partial pressure (on logarithmic scales) for various temperatures. Additionally, the average transport number of the Gd-doped ceria electrolyte was evaluated under varying oxygen partial pressure gradients and temperatures using a specific semi-permeation method and compared with data derived from the Patterson diagram. The results collected in this study indicate that the use of Gd-doped ceria as an SOFC electrolyte requires precise control of oxygen partial pressure (particularly below 10−24 bar at 600 °C) or the hydrogen-to-water ratio at the hydrogen electrode to prevent efficiency degradation of the electrochemical system and to determine optimal operating conditions.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"434 ","pages":"Article 117097"},"PeriodicalIF":3.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692529","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

Room temperature, solid-state Ca ion-exchange in Na0.67Mn0.72Mg0.28O2 室温下，固态Ca离子在Na0.67Mn0.72Mg0.28O2中交换

IF 3.3 4区材料科学

Solid State Ionics Pub Date : 2026-02-01 Epub Date: 2025-12-01 DOI: 10.1016/j.ssi.2025.117085

John-Joseph Marie , Jun Chen , Shengda D. Pu , Alex W. Robertson , Robert A. House , Peter G. Bruce

{"title":"Room temperature, solid-state Ca ion-exchange in Na0.67Mn0.72Mg0.28O2","authors":"John-Joseph Marie , Jun Chen , Shengda D. Pu , Alex W. Robertson , Robert A. House , Peter G. Bruce","doi":"10.1016/j.ssi.2025.117085","DOIUrl":"10.1016/j.ssi.2025.117085","url":null,"abstract":"<div><div>Ion-exchange is an important route to achieve partial or complete substitution of alkali ions into intercalation cathodes for alkali-ion batteries. In Na-ion cathodes, the partial substitution of Na for large, charge dense pillar ions, such as Ca2+, could help alleviate the detrimental structural transitions that these cathodes undergo during desodiation. Typically, ion-exchange is achieved by heating the cathode powder in the presence of a substantial molar excess of alkali halide salt in solution. Here, we successfully demonstrate ion-exchange of Ca2+ for Na+ in Na0.67Mn0.72Mg0.28O2 by simple mechanical mixing of powders with the proper molar amount of CaI2 under ambient conditions. The reaction proceeds in the solid-state at room temperature via the formation of crystalline hydrates of CaI2 which form spontaneously with moisture in the air. Ca2+ is uniformly incorporated into the layered cathode up to a limit of about 0.1 Ca (i.e. Na0.47Ca0.1Mn0.72Mg0.28O2). These findings point to the intriguing possibility of achieving facile room temperature, solid-state ion-exchange in other alkali-ion systems.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"434 ","pages":"Article 117085"},"PeriodicalIF":3.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623404","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