Solid State Ionics最新文献

{"title":"Exploring the reaction process and properties of γ-Ce2S3 derived from pure and Na-doped CeO2 sulfurization with CS2","authors":"Fusheng Song ,&nbsp;Hongbing Wei ,&nbsp;Zongyang Shen ,&nbsp;Zhumei Wang ,&nbsp;Yueming Li","doi":"10.1016/j.ssi.2025.116965","DOIUrl":"10.1016/j.ssi.2025.116965","url":null,"abstract":"<div><div>The sulfurization pathways of pure and Na-doped CeO₂ with CS₂ were investigated to elucidate the mechanism by which Na⁺ doping lowers <em>γ</em>-Ce₂S₃ synthesis temperature. For undoped CeO₂, the synthesis of <em>γ</em>-Ce₂S₃ typically encompasses three primary steps: (1) deoxidation, where oxygen in CeO₂ is substituted by sulfur to form CeS₂; (2) reduction of CeS₂ to <em>α</em>-Ce₂S₃; (3) a phase transition sequence from <em>α</em>-Ce₂S₃ to <em>β</em>-Ce₂S₃, and subsequently to <em>γ</em>-Ce₂S₃. This process requires a high synthesis temperature of up to 1300 °C. Remarkably, Na⁺ introduction fundamentally altered this pathway, bypassing <em>α</em> and <em>β</em> intermediates to directly yield pure <em>γ</em>-Ce₂S₃ at 900 °C. This is attributed to Na⁺-promoted formation of NaCeS₂ and Ce₂O₂S intermediates that facilitate direct <em>γ</em>-phase crystallization. The resultant <em>γ</em>-[Na]-Ce₂S₃ solid solution exhibits modified band structure and enhanced thermal stability compared to undoped <em>γ</em>-Ce₂S₃.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116965"},"PeriodicalIF":3.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679942","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":"Li3BO3 decoration endows fast reaction kinetics of LiFePO4 cathode for lithium ion batteries","authors":"Kaihua Li,&nbsp;Jiajin Li,&nbsp;Haoyu Qi,&nbsp;Jinze Song,&nbsp;Diaohan Wang,&nbsp;Lijun Fu,&nbsp;Yuping Wu","doi":"10.1016/j.ssi.2025.116944","DOIUrl":"10.1016/j.ssi.2025.116944","url":null,"abstract":"<div><div>Olivine-type lithium iron phosphate is widely used as a cathode material for lithium-ion batteries because of its moderate operating voltage, excellent stability, and high safety. However, the high rate capability of LiFePO₄ is limited by its low electrical conductivity. Additionally, its interface and internal structure would degrade under high-rate conditions. To address these issues, Li₃BO₃ was prepared via sol-gel method as the surface decoration to enhance the rate performance of LiFePO₄. The Li₃BO₃ decorated LiFePO₄ (B-LiFePO₄) maintains the structural integrity during cycling under large current densities, furthermore, it induces the formation of favorable cathode-electrolyte interface (CEI) with less Li₂CO₃ and more Li₂O contents, and reduces the activation energy of Li⁺ diffusion in the CEI layer and charge transfer, thus the high capacity and long cycle performances of LiFePO₄ are achieved when cycled at high current densities. At ambient environment and 30C, B-LiFePO₄ delivers a high reversible capacity of 63.1 mAh g⁻¹, and a capacity retention of 90 % can be realized over 600 cycles at 1C. In contrast, the original LiFePO₄ delivers only 27.8 mAh g⁻¹ at 30C and a capacity retention of 67.2 % after 600 cycles at 1C. Besides, B-LiFePO₄ demonstrates good low temperature performance, it exhibits high capacities of 122.1 and 80.7 mAh g⁻¹ at 1C, 0 °C and − 20 °C, respectively. This study provides a simple method to enhance the reaction kinetics of LiFePO₄ cathode, which would benefit the development of LiFePO₄ based lithium ion batteries with high rate performance.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116944"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671017","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":"Graphene oxide-enhanced alginate-PVA biopolymer electrolytes with improved proton conductivity and electrochemical stability for supercapacitor applications","authors":"N.N.A. Hafidz ,&nbsp;N.M. Ghazali ,&nbsp;N.F. Mazuki ,&nbsp;M. Diantoro ,&nbsp;Y. Nagao ,&nbsp;A.S. Samsudin","doi":"10.1016/j.ssi.2025.116956","DOIUrl":"10.1016/j.ssi.2025.116956","url":null,"abstract":"<div><div>This study explores the effect of graphene oxide (GO) incorporation on the structural and electrochemical properties of alginate–poly(vinyl alcohol) (PVA) polymer electrolytes doped with ammonium nitrate (NH₄NO₃) for supercapacitor applications. FTIR analysis revealed specific molecular interactions between graphene oxide (GO) and the polymer host, while XRD results confirmed the enhanced amorphous nature of the composite. At 2 wt.% GO loading, the system exhibited peak ionic conductivity of 1.07 × 10⁻³ S cm⁻¹ at room temperature, with a high ionic transference number (tₙ ≈ 0.98) and an extended electrochemical stability window of 2.85 V. Symmetric supercapacitors fabricated with these electrolytes achieved a specific capacitance of 240.78 F g⁻¹, an energy density of 131 Wh kg⁻¹, and long-term cycling stability up to 10,000 cycles. These results demonstrate that GO-induced structural modulation significantly enhances proton transport and electrochemical performance, offering a promising biopolymer-based platform for next-generation energy storage devices.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116956"},"PeriodicalIF":3.0,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656006","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-charging Na4Fe3(PO4)2P2O7 cathode for sodium-ion batteries","authors":"Yang Yang ,&nbsp;Wensun Zhu ,&nbsp;Shoumeng Yang ,&nbsp;Congcong Liu ,&nbsp;Yu Yao ,&nbsp;Xianhong Rui ,&nbsp;Yan Yu","doi":"10.1016/j.ssi.2025.116963","DOIUrl":"10.1016/j.ssi.2025.116963","url":null,"abstract":"<div><div>Developing fast-charging secondary batteries is a key strategy to enhance the utilization of renewable energy sources and achieve global carbon neutrality. Based on the intrinsic properties of sodium and its resource advantages, sodium-ion batteries hold promising prospects in this field. As a crucial component of batteries, efficient cathode materials are vital for the realization of fast-charging technology. Na₄Fe₃(PO₄)₂P₂O₇, as a high-performance polyanionic cathode material, shows great potential for fast-charging and warrants further research. However, its practical application is still hindered by intrinsically low electronic conductivity, sluggish Na⁺ diffusion kinetics, and the formation of undesired impurity phases during synthesis. The current research status and modification strategies for fast-charging Na₄Fe₃(PO₄)₂P₂O₇ cathodes mainly focus on three aspects: surface and morphology modification, active component modulation, and inhibition of impurity generation. This review provides a summary of these approaches, aiming to offer insights into the rational design and further development of NFPP as a fast-charging cathode for sodium-ion batteries.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116963"},"PeriodicalIF":3.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633135","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":"Hydrogen and lithium tracer diffusivities as a function of hydrogen concentration in Li(Nb,Ta)O3 single crystals","authors":"Claudia Kofahl ,&nbsp;Lars Dörrer ,&nbsp;Steffen Ganschow ,&nbsp;Hendrik Wulfmeier ,&nbsp;Holger Fritze ,&nbsp;Harald Schmidt","doi":"10.1016/j.ssi.2025.116968","DOIUrl":"10.1016/j.ssi.2025.116968","url":null,"abstract":"<div><div>For LiNb_1-xTa_xO₃ single crystals, the ion diffusivities of the species Li and H (as an impurity) have strong influence on the overall conductivity at temperatures below 600 °C. We investigated the diffusion of H and Li in LiNbO₃, LiTaO₃, and LiNb_0.15Ta_0.85O₃ single crystals as a function of H concentration over two order of magnitude at 510 °C. The hydrogen diffusion experiments were realized by isotope exchange of deuterium (D) and hydrogen (H) in a gaseous D₂O atmosphere and infra-red spectroscopy. The lithium diffusion experiments were done by ⁶Li/⁷Li tracer exchange and Secondary Ion Mass Spectrometry. The diffusivities of both types of species decrease only slightly with increasing hydrogen concentration between 5 × 10¹⁶ cm⁻³ and 3 × 10¹⁸ cm⁻³ by a maximum factor of two to three for each type of diffusor. We suggest that the increased incorporation of hydrogen up to a concentration of about 3 × 10¹⁸ cm⁻³ into the lattice modifies only very slightly the migration of both species.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116968"},"PeriodicalIF":3.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631206","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":"Application of high-performance lithium-ion batteries with dual-layer separators composed of electron beam irradiated PVDF-HFP/PMMA/AlO(OH) and PVDF-CTFE/PEO/LiTFSI/AlO(OH) in fast charging and discharging","authors":"Yu Pan ,&nbsp;Yuanjie Cai ,&nbsp;Jiaojiao Zhan ,&nbsp;linlin Wang ,&nbsp;Shaojin Jia","doi":"10.1016/j.ssi.2025.116969","DOIUrl":"10.1016/j.ssi.2025.116969","url":null,"abstract":"<div><div>With the rapid advancement of battery technologies, the demand for high-performance lithium-ion batteries (LIBs) has surged, particularly in fast-charging applications. This has driven the exploration of advanced materials to overcome the limitations of commercial separators. In this study, we present a pioneering approach: a dual-layer composite separator comprising Poly(vinylidene fluoride-<em>co</em>-hexafluoropropylene)/ Poly(methyl methacrylate)/ Aluminum oxyhydroxide and Poly(vinylidene fluoride-<em>co</em>-chlorotrifluoroethylene)/ Poly(ethylene oxide)/ Lithium bis(trifluoromethanesulfonyl)imide/ Aluminum oxyhydroxide (PVDF-HFP/PMMA/AlO(OH) and PVDF-CTFE/PEO/LiTFSI/AlO(OH)), modified via electron beam irradiation at varying doses to enhance separator performance, especially in mitigating rapid capacity degradation under fast-charging conditions. Electron beam irradiation induces cross-linking to enhance the material's mechanical strength, chemical stability and thermal stability without compromising its inherent polymer structure. Radiation triggers free radicals, allowing polymers to crosslink at room temperature and preventing membrane deformation. Due to the absence of initiators, the electrical and electrochemical properties of the system are not affected. This constitutes its primary advantage over alternative cross-linking approaches, which typically compromise structural integrity through chemical additives or thermal degradation. The most significant feature of this dual-layer separator is its ability to effectively address interfacial compatibility issues between the cathode and anode. Compared to commercial polypropylene (PP) separators, the dual-layer separator exhibits superior thermal stability, porosity (71 %), electrolyte wettability (421 % uptake), ionic conductivity (1.42 mS cm⁻¹) and electrochemical performance. The optimal formulation, containing 12 wt% boehmite nanoparticles and irradiated at 160 kGy, demonstrated exceptional cycling stability. At a current density of 10C, the battery retained 94.1 % of its initial discharge capacity (108.9 mAh g⁻¹) after 1000 cycles. Even under extreme fast-charging conditions (10C and 15C), the separator maintained &gt;90 % and &gt; 80 % capacity retention after 1000 and 1500 cycles, respectively. These results highlight the dual-layer separator's ability to sustain high energy density while addressing capacity fade, offering a viable pathway for commercializing fast-charging LIBs. The synergistic effects of boehmite-enhanced interfacial compatibility and radiation-induced crosslinking provide a robust framework for next-generation battery separators.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116969"},"PeriodicalIF":3.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631205","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 magnetron sputtering of LiPON from carbon-doped Li3PO4 target","authors":"Nicolas Osenciat,&nbsp;Erica D. Clinton,&nbsp;Joel Casella,&nbsp;Alessia Romio,&nbsp;André Müller,&nbsp;Evgeniia Gilshtein,&nbsp;Moritz H. Futscher,&nbsp;Yaroslav E. Romanyuk","doi":"10.1016/j.ssi.2025.116957","DOIUrl":"10.1016/j.ssi.2025.116957","url":null,"abstract":"<div><div>Thin layers of lithium phosphorus oxynitride (LiPON) have been deposited by RF and DC magnetron sputtering from a conductive carbon-doped Li₃PO₄ ceramic target. We investigate the deposition rate, composition, morphology, and electrochemical properties of sputtered LiPON solid-state electrolyte layers. It is possible to increase the deposition rate in RF and DC modes by a factor of four to ten compared to the reference RF sputtering from the undoped target. X-ray photoelectron spectroscopy did not detect residual carbon impurities in as-deposited LiPON. The layers exhibit comparable electrochemical properties and ionic conductivity in the range of 2–5 · 10^{<em>−</em>7} <em>S/cm</em>, which can be further improved when co-sputtering with Li₂O. The 300-nm-thin RF-co-sputtered LiPON solid separator has been integrated into a thin-film battery with a Li-metal anode, which showed negligible degradation after 190 cycles.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116957"},"PeriodicalIF":3.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631204","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":"Sulfur-tolerance variation in intermediate-temperature sulfur La0.7Sr0.3V oxide anode catalyst in hydrogen atmosphere","authors":"T.M. Sebastian ,&nbsp;T.E. Burye","doi":"10.1016/j.ssi.2025.116961","DOIUrl":"10.1016/j.ssi.2025.116961","url":null,"abstract":"<div><div>As SOFC technologies migrate to lower temperature operation to resolve physical degradation issues, the development catalysts materials with greater sulfur tolerance are being explored to resolve issues of chemical degradation related to sulfur poisoning. In this study, a previously reported, high temperature, sulfur tolerant SOFC catalyst, La_0.7Sr_0.3VO_3.86-⸹ (LSV), was further experimentally investigated via X-ray Diffraction, Scanning Electron Microscopy and Energy Dispersive Spectroscopy for its sulfur tolerance at currently targeted SOFC intermediate operating temperatures (400–700 °C) in hydrogen sulfide concentrations between 30 ppm–300 ppm, balance hydrogen gas up to 100 hr. LSVs sulfur tolerance varied with operating temperature and H₂S concentration with the lowest sulfur adsorption rates occurring between 500 and 700 °C and is attributed to LSVs cubic structure and vanadium's V3+ oxidation state. At temperatures between 400 and 500 °C LSV shows decreased tolerance which is attributed to its monoclinic/tetragonal crystal structure and vanadium's V5+ oxidation state.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116961"},"PeriodicalIF":3.0,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611714","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":"A novel phosphorus-doped Ge3N4 powder as high-capacity anode materials for lithium-ion batteries","authors":"Yan Wu ,&nbsp;Jiachang Zhao ,&nbsp;Jiajun Chen ,&nbsp;Hongbin Zhao ,&nbsp;Xinxin Zhao","doi":"10.1016/j.ssi.2025.116964","DOIUrl":"10.1016/j.ssi.2025.116964","url":null,"abstract":"<div><div>In this paper, the effect of doping with phosphorus atoms (P atoms) on the electrochemical performance of Ge₃N₄ as anode materials for lithium-ion batteries (LIBs) is investigated. P-doped Ge₃N₄ (P-Ge₃N₄) is synthesized by an in-situ nitridation and phosphorization method utilizing urea and NaH₂PO₂·H₂O as nitrogen and phosphorus sources. The P-Ge₃N₄ material is systematically characterized and the effect of phosphorus doping on the structure of Ge₃N₄ is studied. The electrochemical performance of the P-Ge₃N₄ anode materials in LIBs is also tested. The results indicate that the presence of P atoms enhances the overall electronic conductivity. The first discharge capacity of P-Ge₃N₄ material is 1548.53 mAh g⁻¹, which is much higher than that of pure Ge₃N₄ (850.26 mAh g⁻¹), and P-Ge₃N₄ still maintains a higher reversible discharge capacity than Ge₃N₄ after 100 cycles. P-Ge₃N₄ exhibits superior rate capability compared to Ge₃N₄, maintaining higher discharge capacities at various current densities. Based on density functional theory (DFT) simulation and calculation, it is found that the band gap width decreased from 1.76 eV to 0.27 eV, indicating that P doping improves the conductivity of Ge₃N₄. This study establishes an effective phosphorus atom doping strategy by combining experimental characterization and theoretical calculations, showing how the introduction of P changes the crystal structure, electronic properties and electrochemicl performance of Ge₃N₄. It provides a new theoretical and experimental basis for the design and optimization of high-performance anode materials for LIBs.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116964"},"PeriodicalIF":3.0,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611612","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":"LiMnO2 cathodes: Taming Jahn-Teller distortions via local symmetry engineering and multi-scale structural design","authors":"Boya Wang,&nbsp;Valentina A. Bocharova,&nbsp;Lin Gu","doi":"10.1016/j.ssi.2025.116954","DOIUrl":"10.1016/j.ssi.2025.116954","url":null,"abstract":"<div><div>As a high-efficiency energy storage device, lithium-ion batteries greatly benefit from performance optimization of cathode materials to enhance their overall capabilities. LiMnO₂, with its advantages such as high theoretical capacity, abundant manganese resources, environmental friendliness, and low cost, has emerged as a potential candidate to replace traditional LiCoO₂ and ternary cathode materials. However, its practical application still faces significant challenges, including thermodynamic instability leading to structural phase transitions, pronounced Jahn-Teller distortions, and manganese dissolution issues. This review focuses on these critical challenges, systematically discussing the development history and modification strategies of LiMnO₂. Approaches such as local symmetry engineering, interface engineering, doping modification, composite structure design, and high-pressure synthesis show great potential in improving the comprehensive performance of LiMnO₂. By integrating the latest research findings, we propose tailored strategies to design highly stable LiMnO₂. Future studies should further explore multi-scale structural modulation and dynamic phase transition mechanisms to facilitate the practical application of LiMnO₂ in high-energy-density lithium-ion batteries.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116954"},"PeriodicalIF":3.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604940","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}