Solid State Ionics最新文献

{"title":"Structure and electrochemical properties of MgAl co-doped spinel LiMn2O4 cathode material","authors":"Yongsheng Yang PhD,&nbsp;Long Shi,&nbsp;Junming Guo","doi":"10.1016/j.ssi.2025.117031","DOIUrl":"10.1016/j.ssi.2025.117031","url":null,"abstract":"<div><div>Mg<img>Al co-doping and single-crystal truncated octahedral morphology strategy was employed to suppress and mitigate the Jahn-Teller distortion and Mn dissolution in spinel-type LiMn₂O₄ materials. LiMg_0.10Al_<em>y</em>Mn_{1.90-<em>y</em>}O₄ (<em>y</em> = 0.03, 0.05, 0.08, 0.10, and 0.12) cathode materials were synthesized via solid-phase combustion method and the effects of varying Al contents on the crystal structures, single-crystal truncated octahedral morphology, valence states of doped elements, rate and long-cycle electrochemical performance, and Li⁺ ion migration kinetics of spinel-type LiMn₂O₄ materials were investigated. The results indicate that Mg<img>Al co-doping promotes the crystalline development of spinel-type LiMn₂O₄ material and the preferential growth of {111}, {100}, and {110} crystal planes, forming complete single-crystal truncated octahedral morphology. Among samples with different Mg and Al doping levels, the Mg<img>Al co-doped sample LiMg_0.10Al_0.05Mn_1.85O₄ exhibits superior capacity and cycle stability. At a low rate of 1C, the initial discharge specific capacity is 114.7 mAh·g⁻¹, with an 93.6 % capacity retention after 200 cycles; at high rates of 10, 15, and 20C, the initial discharge specific capacities are 94.4, 92.4, and 84.5 mAh·g⁻¹ respectively, with capacity retention rates of 84.1 %, 76.9.2 %, and 81.7 % after 1000 cycles; at high temperatures of 55 °C and rates of 1C, 5C and 10C, the initial discharge specific capacities are 113.7, 111.1 and 100.5 mAh·g⁻¹ respectively, with retention rates of 68.6 %, 46.1 % and 37.8 % after 200, and 500 cycles. The LiMg_0.10Al_0.05Mn₁₈₅O₄ sample has the lowest charge transfer resistance (168.6 Ω) and apparent activation energy (32.39 kJ·mol⁻¹), and the highest Li⁺ diffusion coefficient (1.20 × 10⁻¹¹ cm²·s⁻¹). This indicates that during charging and discharging, Li⁺ ions in this sample encounter lower resistance and energy barriers, resulting in faster migration rates, which can enhance the material's rate capacity and cycling stability.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117031"},"PeriodicalIF":3.3,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155823","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 structure and electrochemical properties of double-doped regulated P2/O3 cophasic sodium-ion batteries","authors":"Zhenhong Tian ,&nbsp;Li-ang Zhu ,&nbsp;Jingxiu Tian ,&nbsp;Hongshun Miao ,&nbsp;Yinghui Jiang ,&nbsp;Rongkang Tan ,&nbsp;Xiangxin Li ,&nbsp;Yan Liu","doi":"10.1016/j.ssi.2025.117029","DOIUrl":"10.1016/j.ssi.2025.117029","url":null,"abstract":"<div><div>A trace Ti/Mg co-doped Na_0.8Ni_0.35Mn_0.48Ti_0.12Mg_0.05O₂ (TiMg-NNM) cathode was synthesized, where Ti ions are located in the transition metal layers and Mg ions are incorporated into the sodium layers. The co-doping expands the Na-layer spacing within the layered structure, thereby lowering the diffusion barrier for Na-ions. Structural stability is significantly enhanced due to the robust Ti<img>O bond and the pillar-like effect of Mg ions, which also helps to minimize surface side reactions with the electrolyte. The merits endow a high reversible capacity of TiMg-NNM cathode with 130.5 mAh/g at 1C, the 85.8 % capacity retention rate at 100 cycles at 1C, much greater than 35.6 % of NNM. The synergistic effect of P2 and O3 phases was strengthened by the doping of Mg and Ti, so that the obtained NNMMT had high electrochemical stability. The research offers a practical approach and fresh perspectives for designing high-performance layered oxide cathode materials with improved structural and interfacial stability for SIBs.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117029"},"PeriodicalIF":3.3,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119332","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":"Exploring the structural and conductivity behaviours of mechanochemically and hydrothermally synthesized Ce3+-doped BaSnF4 solid electrolytes for all-solid-state fluoride-ion batteries","authors":"K. Ramakrushna Achary ,&nbsp;Sumit Khatua ,&nbsp;Kshatri Durga Lalitha Bai ,&nbsp;Guruprasad Sahoo ,&nbsp;L.N. Patro","doi":"10.1016/j.ssi.2025.117032","DOIUrl":"10.1016/j.ssi.2025.117032","url":null,"abstract":"<div><div>Recent studies on batteries have drawn significant attention to all-solid-state fluoride-ion batteries (FIBs) as potential alternatives to the conventional Li-ion batteries because of their higher theoretical energy densities. On the solid electrolyte side, efforts are being made to develop a suitable material with improved ionic conductivity (∼ 10⁻³ S/cm) and enhanced electrochemical stability. SnF₂-based solid electrolyte, BaSnF₄ crystallizes in the PbSnF₄ structure and is frequently considered as a potential solid electrolyte for FIBs operating at room temperature (RT). In this study, the conductivity results of BaSnF₄ are influenced by doping with rare-earth ions (Ce³⁺) at different concentrations and by the synthesis methodology. The structural and transport behaviours of Ce³⁺-doped BaSnF₄ solid electrolytes, prepared by mechanical milling and hydrothermal methods, are compared. The formation of the doped materials, which exhibit a tetragonal phase, is confirmed by X-ray diffraction. The presence of Ce³⁺ in the doped materials prepared by both methods is confirmed by their photoluminescence characteristics. Among the materials investigated in this study, 2 mol% Ce³⁺-doped BaSnF₄, prepared by mechanical milling (Ba_0.98Ce_0.02SnF_4.02-MM) exhibits the highest ionic conductivity and electrochemical stability. The conductivity (RT) exhibited by Ba_0.98Ce_0.02SnF_4.02-MM is higher compared to earlier reports on different rare-earth ion-doped BaSnF₄, which were primarily prepared by solution-based methods. Ion transport number measurement using <em>dc</em> polarization technique revealed that the conductivity exhibited by Ba_0.98Ce_0.02SnF_4.02-MM is mainly due to ionic conduction. The observation of a higher ionic conductivity value in Ba_0.98Ce_0.02SnF_4.02-MM highlights its great potential for use as a solid electrolyte in the fabrication of FIBs.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117032"},"PeriodicalIF":3.3,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119342","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":"Optoionics – Controlling ions with light","authors":"A. Gouder ,&nbsp;B.V. Lotsch","doi":"10.1016/j.ssi.2025.117018","DOIUrl":"10.1016/j.ssi.2025.117018","url":null,"abstract":"<div><div>Optoionics has recently emerged at the intersection of optoelectronics and solid state ionics, triggered by fundamental work on light-induced ionic conductivity enhancement in methylammonium lead iodide (MAPI). This perspective traces the evolution of optoionics from early 20th century studies on photoionics to contemporary research, elucidating the semantic nuances and historical development of light–ion interactions. We follow the first observations such as copper photoionization and subsequent conceptual extensions such as molecular photoionics and photo-ionic cells, leading on to the current definition and understanding of optoionics. We then proceed to apply this understanding on light–ion interactions in carbon nitrides, distinguishing between intrinsic and extrinsic optoionic effects depending on whether one or more distinct phases are involved. This nuanced understanding is essential for the design of optoionic devices that exploit light–ion interactions to couple light harvesting and electrochemical energy storage. Finally, we provide an outlook on emerging optoionic devices at the intersection of energy conversion and storage and discuss smart circuit elements that integrate optoionic principles for advanced technological applications.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117018"},"PeriodicalIF":3.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107092","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":"Apparent non-monotonic electrical conductivity relaxation of 1 % Gd-doped ceria","authors":"Yizhou Shen,&nbsp;Reidar Haugsrud","doi":"10.1016/j.ssi.2025.117016","DOIUrl":"10.1016/j.ssi.2025.117016","url":null,"abstract":"<div><div>Steady-state and transient electrical conductivities of 1 % Gd-substituted ceria have been characterized from 550 to 800 °C under oxidizing conditions. The temperature and oxygen pressure dependencies of the steady-state conductivity resemble those of pristine ceria, with predominant n-type conductivity and some contribution of p-type conductivity under the most oxidizing conditions. Depending on temperature and oxygen partial pressure, the relaxation of the conductivity follows one-fold monotonic, two-fold monotonic, or non-monotonic behavior, despite the predominance of two charge carriers in the bulk material. Possible explanations for this peculiar phenomenon are discussed based on surface-exchange-limited oxygen exchange.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117016"},"PeriodicalIF":3.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107090","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":"Hydration and conduction behavior of Sc and Zr-substituted Ba7Nb4MoO20","authors":"Sara Adeeba Ismail ,&nbsp;Lulu Jiang ,&nbsp;Hui Guo ,&nbsp;Wenhao Li ,&nbsp;Donglin Han","doi":"10.1016/j.ssi.2025.117027","DOIUrl":"10.1016/j.ssi.2025.117027","url":null,"abstract":"<div><div>Ba₇Nb₄MoO₂₀ has acceptably high ionic conductivity at 600–800 °C and is attractive for potential application in high temperature solid state electrochemical devices. Up to now, most of the research focuses on isovalent and donor-doping to improve the electrical properties of Ba₇Nb₄MoO₂₀. In this work, an acceptor-doping strategy was taken by doping Sc and Zr to partially substitute Nb. More vacant oxygen sites thereby form for charge compensation, leading to the increasing proton concentration following the compositional sequence of hydrated Ba₇Nb₄MoO₂₀ &lt; Ba₇Nb_3.97Zr_0.03MoO_19.985 &lt; Ba₇Nb_3.97Sc_0.03MoO_19.97. Notably, both the H₂O/D₂O isotope effect and EMF measurements indicate that the proton conduction – if there is any – is negligibly small, and the Sc and Zr-doped Ba₇Nb₄MoO₂₀ is essentially an oxide ion conductor in the temperature range studied in this work.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117027"},"PeriodicalIF":3.3,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107091","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":"Influence of Germanium oxide nanoparticles on the electrical conductivity of Li-ion conducting NaCMC/PVA nanocomposite films","authors":"Seshan T.N ,&nbsp;Vipin Cyriac ,&nbsp;Demappa T ,&nbsp;Ismayil","doi":"10.1016/j.ssi.2025.117015","DOIUrl":"10.1016/j.ssi.2025.117015","url":null,"abstract":"<div><div>This study examines the influence of GeO₂ nanoparticles (NPs) on the ionic conductivity and structural properties of NaCMC/PVA/LiBr-based solid polymer electrolytes synthesized via solution casting technique. XRD analysis revealed enhanced amorphous character with increasing GeO₂ content. FTIR spectra confirmed interactions between GeO₂ NPs and the polymer-salt matrix. SEM and EDX analyses were used to investigate morphology and elemental composition. UV–Vis spectroscopy showed a redshift in absorption edge and a bandgap reduction from 5.70 to 5.50 eV with GeO₂ addition. Impedance spectroscopy (100 Hz - 5 MHz) indicated improved ionic conductivity, following Jonscher's universal power law, with a maximum value of (1.13 ± 0.02) × 10⁻⁵ S cm⁻¹ at 5 wt% GeO₂. LSV confirmed electrochemical stability up to 2.7 V. Dielectric studies revealed an increase in permittivity due to interfacial polarization. Transference number measurement evaluates the relative contributions of ionic and electronic charge carriers in solid polymer electrolytes using polarization technique. These results highlight the potential of GeO₂-dispersed NaCMC/PVA/LiBr films for energy storage applications.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117015"},"PeriodicalIF":3.3,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020852","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":"The extraction of hopping frequencies of mobile fluorine ions in the superionic conductor Ba0.5La0.5F2.5 from electrical modulus spectroscopy data","authors":"N.I. Sorokin","doi":"10.1016/j.ssi.2025.117017","DOIUrl":"10.1016/j.ssi.2025.117017","url":null,"abstract":"<div><div>The spectra of the complex electrical modulus <em>M</em>*(<em>ν</em>) = <em>M</em> ^/+<em>iM</em> ^// for a single crystal of the superionic conductor Ba_0.5La_0.5F_2.5 with a fluorite-type structure (sp. gr. <span><math><mi>Fm</mi><mover><mn>3</mn><mo>¯</mo></mover><mi>m</mi></math></span>) were studied in the frequency range of 10⁻¹–10⁷ Hz at temperatures of 210–407 K. The diagrams of the complex modulus <em>M</em> ^/(<em>ν</em>), <em>M</em> ^//(ν) take the Cole-Cole form and are characterized by the presence of a distribution of relaxation times of mobile ion carriers. On the frequency dependences of the imaginary part of the complex modulus <em>M</em> ^//(<em>ν</em>), the relaxation peaks are observed, caused by hopping rates of mobile interstitial fluorine ions (charge carriers). Based on the temperature change in the position of relaxation maxima, calculations were made of the activation enthalpy Δ<em>H</em>_h and the average frequency ν_h of carrier jumps. The calculated values of Δ<em>H</em>_h and ν_h are in satisfactory agreement with the results obtained by the Almond-West method for this crystal. Within the framework of the crystallophysical model, the carrier mobility μ_mob and mobile ion concentration <em>n</em>_mob were calculated. Research using the method of modular spectroscopy is of undoubted interest for the further search and creation of fluorine-conducting solid electrolytes.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117017"},"PeriodicalIF":3.3,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007565","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":"Dopant synergy vs. competition in codoped Li7La3Zr2O12 garnet solid electrolytes","authors":"Ethan Anderson,&nbsp;Julie Cagnard,&nbsp;Rustam Z. Khaliullin,&nbsp;Eric McCalla","doi":"10.1016/j.ssi.2025.117014","DOIUrl":"10.1016/j.ssi.2025.117014","url":null,"abstract":"<div><div>LLZO is typically singly doped with Ga or Ta to reach ionic conductivities over 1 mS/cm, and some recent studies have examined the potential conductivity benefits of codoping the material. However, to date codoped LLZO fails to out-perform singly doped LLZO in terms of conductivity, and no study has sufficiently explored the consequences on other necessary properties. We have previously screened 59 possible single dopants to determine their impact on these properties. No single dopant addresses all requirements, thus, here we explore triple doping. We choose Ga for high ionic conductivity and low electronic conductivity, Dy for high voltage stability, and Ti for low voltage stability. The benefits and tradeoffs of codoping are determined with 64 samples spanning the triple doping space. We find fundamental limitations to codoping. The high ionic conductivity of Ga-doped LLZO is lowered by the addition of the other dopants, though this is mitigated partly by increased Ga levels. Electronic conductivity, by contrast, shows that a critical level of Ga is needed to obtain low conductivities, and this is resilient to the other dopants such that codoping is effective here. By contrast, the high voltage stability is systematically limited by the poor performance of Ga, and Dy is not effective in overcoming this, but Ti alone does help the low voltage stability of the Ga containing materials. These fundamental limitations suggest that multilayer designs will likely be required for viable solid batteries.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"431 ","pages":"Article 117014"},"PeriodicalIF":3.3,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005042","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":"Editorial for 24th International conference on Solid State Ionics (SSI-24)","authors":"John Kilner ,&nbsp;Stephen J. Skinner ,&nbsp;William C. Chueh","doi":"10.1016/j.ssi.2025.117012","DOIUrl":"10.1016/j.ssi.2025.117012","url":null,"abstract":"","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"430 ","pages":"Article 117012"},"PeriodicalIF":3.3,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045063","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}