{"title":"Synergistic strategy of composition design and multiscale structure regulation for high energy storage performance of PLZT under low electric fields","authors":"Bing Li, Fangjian Tu, Xinyu Wang, Huachang Wang, Qin Wang, Cuilan Tang, Jingsong Liu","doi":"10.1039/d5ta05347a","DOIUrl":"https://doi.org/10.1039/d5ta05347a","url":null,"abstract":"Dielectric energy storage ceramics have become the core driving force for the development of high-tech fields. However, the high energy storage density usually requires high electric field excitation; this not only increases the energy consumption of electric power resources but also raises the risk of device failure. Furthermore, it is often difficult to achieve a balance between recoverable energy density (<em>W</em><small><sub>rec</sub></small>) and efficiency (<em>η</em>). Therefore, developing high energy storage performance materials under low electric fields is a bottleneck issue. In this study, relaxor antiferroelectric ceramics of Pb<small><sub>0.9325</sub></small>-<em>x</em>La<small><sub>0.045</sub></small>Ca<small><sub><em>x</em></sub></small>Zr<small><sub>0.92</sub></small>Ti<small><sub>0.075</sub></small>Hf<small><sub>0.00</sub></small>5O<small><sub>3</sub></small> (PLC<small><sub><em>x</em></sub></small>ZTH) were designed by a synergistic optimization strategy of composition design and multi-scale structure manipulation. Then, a high <em>W</em><small><sub>rec</sub></small> (∼5.15 J cm<small><sup>−3</sup></small>) and <em>η</em> (∼85.1%) under 230 kV cm<small><sup>−1</sup></small> were realized in PLC<small><sub>0.03</sub></small>ZTH. Even when the working electric field was reduced to 190 kV cm<small><sup>−1</sup></small>, the <em>W</em><small><sub>rec</sub></small> could still reach 4.05 J cm<small><sup>−3</sup></small> with high <em>η</em> of 87.1%. The energy storage performance is superior to that of other works. Multi-level structure characterization suggests that the enhanced stability of the orthorhombic phase strengthens the antiferroelectricity and <em>P</em><small><sub>max</sub></small>, and the PE<small><sub>MCC</sub></small> phase elicited by compositional inhomogeneity can reduce the hysteresis loss to optimize <em>η</em>. Most importantly, the induced strong localized fluctuations of strain at the nanoscale alter the energy barrier distribution, promoting the formation of nano-domain structure and polar nanoregions (PNRs), which significantly increased <em>W</em><small><sub>rec</sub></small> and <em>η</em> under low electric fields. These results represent a breakthrough in balancing the reduced working electric field and energy storage density as well as efficiency. The study proposes a novel paradigm for designing high energy storage performance ceramics under low electric fields, holding critical significance for next-generation pulse power systems and compact electronics.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"270 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Samarium Ion-induced Interfacial Regulation to Construct High-performance Anodes for Aqueous Zinc Metal Batteries","authors":"Liang Zhao, Jinying Yang, Mengxue Shi, Xin Miao, Mingze Gao, Jiecheng Chen, Shiying Xiao, Ziyang Guo","doi":"10.1039/d5ta06664f","DOIUrl":"https://doi.org/10.1039/d5ta06664f","url":null,"abstract":"Zinc metal batteries (ZMBs) are attracting wide attention due to their high-safety, low-cost and environment-friendly. Nevertheless, the loose deposites and dendrites on Zn anodes significantly hinders the cycling life of ZMBs. Herein, we propose the incorporation of samarium chloride (SmCl3) additives into the aqueous electrolyte to construct ZMBs. The SmCl3 additives diminishes the thickness of the electric double layer (EDL) on the Zn anodes to lessen the repulsive forces between Zn deposits and thus promote the dense deposition of metallic Zn. Furthermore, the Sm3+ ions not only are preferentially adsorped at the active sites (i. e. the protrusions of Zn anodes) to effectively suppresses the formation of Zn dendrites, but also optimize the Zn2+ ions diffusion rate and inhibit the existence of highly active water molecules on the surface of Zn anodes to reduce the side reactions. Hence, the Zn||Zn symmetric batteries containing SmCl3 additives stably operate for 2100 h at 2 mA cm-2, and even shows the stable discharge/charge curves for 100 h under high current of 50 mA cm-2. The HNaV6O16·4H2O (HNVO)-based ZMBs with SmCl3 additives achieve the high initial discharge capacity (257 mAh g-1) and remarkable cycling life (1000 cycles) at 1 A g-1and also show the good capacity retention of 96.39% after 36 h resting. When combined with polyaniline (PANI) cathodes, the corresponding SmCl3-based battery also displays good cycling performance (1000 cycles at 5 A g-1). This work highlight the multi-functions of the rare earth metal-based additives in aqueous ZMBs.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"97 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jack McAlpine, Hrishikesh Tupkar, Sila Alemdar, Adrian Gonzalez-Marcano, Jack S. Verich, Matthew A. Gebbie
{"title":"Amplifying Interfacial Capacitance Through Underpotential Deposition in Salt-in-Ionic Liquid Electrolytes","authors":"Jack McAlpine, Hrishikesh Tupkar, Sila Alemdar, Adrian Gonzalez-Marcano, Jack S. Verich, Matthew A. Gebbie","doi":"10.1039/d5ta04148a","DOIUrl":"https://doi.org/10.1039/d5ta04148a","url":null,"abstract":"Rapid growth of intermittent energy sources, such as wind and solar, is causing a resurgence in research on materials and devices that store electrochemical energy. Electrochemical capacitors exhibit promising device characteristics to help level grid scale power fluctuations, including fast charge-discharge kinetics and long device lifetimes. This is especially true for ionic liquids, which promise increased safety and performance, as compared to volatile organic electrolytes commonly used in batteries. However, large scale implementation of ionic liquid-based capacitors remains limited by low device energy densities, as the interfacial capacitance of ionic liquid-electrode interfaces decreases significantly under large polarization. Here, we investigate how incorporating metal cations of varying size and valence into ionic liquids modifies electric double layer formation. We find that alkali cations substantially amplify interfacial capacitance in salt-in-ionic liquid electrolytes, overcoming capacitive limitations caused by ion crowding. Remarkably, we observe capacitive enhancement exceeding 350% in lithium- and sodium-containing electrolytes at Au and Cu electrodes under large polarization, where ion crowding diminishes interfacial capacitance in neat ionic liquids. Our data indicates that metal cation underpotential deposition plays a key role in capacitive enhancement, and we observe that this process can be highly reversible under cycling. Our findings suggest that tuning metal-electrolyte interactions to enable underpotential deposition provides avenues for increasing capacitor performance. This opens the door to additional opportunities for developing devices that could play an essential role in leveling power fluctuations that are inherent to renewable energy grids.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"118 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Camilla Tacconis, Sunita Dey, Carson D. McLaughlin, Debashis Tripathy, Heather F. Greer, Shaoliang Guan, Iuliia Mikulska, Israel Temprano, Clare P. Grey, S. E. Dutton
{"title":"Deciphering the Origin of the High Capacities Seen in Magnesium Borate Polyanion Cathodes","authors":"Camilla Tacconis, Sunita Dey, Carson D. McLaughlin, Debashis Tripathy, Heather F. Greer, Shaoliang Guan, Iuliia Mikulska, Israel Temprano, Clare P. Grey, S. E. Dutton","doi":"10.1039/d5ta07239e","DOIUrl":"https://doi.org/10.1039/d5ta07239e","url":null,"abstract":"Recent reviews have highlighted borate polyanion systems as promising high-voltage cathode candidates for rechargeable Mg-ion batteries (RMBs) [Coordination Chemistry Reviews, 427, 213551 (2021)]. However, evaluating the electrochemical performance of cathodes for Mg-ion batteries is challenging, with many reports relying on an observed electrochemical capacity rather than demonstrating Mg-ion (de)intercalation. To address these two points, we study three classes of borate polyanions: orthoborates M<small><sub>3</sub></small>(BO<small><sub>3</sub></small>)<small><sub>2</sub></small>, ludwigites M<small><sub>3</sub></small>BO<small><sub>5</sub></small>, and pyroborates M<small><sub>2</sub></small>B<small><sub>2</sub></small>O<small><sub>5</sub></small> and use a suite of experimental techniques to investigate de-magnesiation on charging vs Li metal with a Li electrolyte. We select five representative materials Mg<small><sub>2</sub></small>Mn(BO<small><sub>3</sub></small>)<small><sub>2</sub></small>, Mg<small><sub>2</sub></small>Ni(BO<small><sub>3</sub></small>)<small><sub>2</sub></small>, Mg<small><sub>2</sub></small>FeBO<small><sub>5</sub></small>, MgFeB<small><sub>2</sub></small>O<small><sub>5</sub></small> and MgFe<small><sub>0.5</sub></small>Mn<small><sub>0.5</sub></small>B<small><sub>2</sub></small>O<small><sub>5</sub></small>. Whilst promising first charge capacities up to 200 mAh g<small><sup>−1 </sup></small>are observed for ball-milled cathodes cycled at 55°C in a Li containing electrolyte, extensive post-cycling analysis using ex-situ X-ray Photoelectron Spectroscopy (XPS) and ex-situ Synchrotron Powder X-ray Diffraction (SXRD), combined with operando X-ray Absorption Spectroscopy (XAS) and operando Online Electrochemical Mass Spectrometry (OEMS), show that the capacities obtained are not associated with Mg<small><sup>2+</sup></small> mobility in the cathodes, de-magnesiation or transition-metal redox. The observed capacity originates from a process enhanced by ball-milling, which is common to all borate polyanions investigated in this work. This process is in part attributed to the irreversible reaction of an amorphous surface layer on the polycrystalline particle, rich in carbonate and glassy borate phases. Here we present the first systematic study of the viability of transition-metal borate polyanions as intercalation cathode materials for RMBs and conclude that, despite the promising electrochemistry, these materials do not de-magnesiate under our tested conditions.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"23 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structural evolution and cycle enhancement of LiFe0.5Mn0.5PO4 nanofibers as cathode materials for aqueous lithium-ion batteries","authors":"Shanbao Zou, Xingjian Qin, Wangsheng Yuan, Xinhai yuan, Wenjing Ji, Zhanfeng Zhang, Lijun Fu, Yuping Wu","doi":"10.1039/d5ta05855d","DOIUrl":"https://doi.org/10.1039/d5ta05855d","url":null,"abstract":"Aqueous lithium-ion batteries (ALIBs) attract increasing research attention as large-scale energy storage technique, because of their high safety and cost effectiveness. Searching new electrode materials is crucial to gain high energy density of ALIBs. LiFexMn1-xPO4 with high voltage plateau and high theoretical capacity, is promising cathode candidate for ALIBs, yet the electrochemical performance and reaction mechanism in ALIBs have not been explored. Herein, combined electrochemical investigation and spectroscopic study show that the manganese element dissolved from LiFe0.5Mn0.5PO4, leading to further structural degradation and dramatic capacity fading during cycling in conventional 2 M Li2SO4 electrolyte. By applying 30 m LiTFAC aqueous electrolyte, in which the free water content is reduced, the Mn dissolution of LiFe0.5Mn0.5PO4 is significantly suppressed. The synthesized LiFe0.5Mn0.5PO4 nanofiber cathode exhibits a specific capacity of 121.6 mAh g-1 over 100 cycles with a high capacity retention of 94%. In addition, LiFe0.5Mn0.5PO4 nanofiber cathode shows excellent rate performance as well in 30 m LiTFAC aqueous electrolyte, a capacity of 70.9 mAh g-1 at 10 C can be achieved over 100 cycles. This study demonstrates the promising application potential of LiFexMn1-xPO4 as cathode material for ALIBs with high energy density.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"87 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Suoying Zhang, Hang Li, Xiao han Huang, Yu Chen Wang, Fang yu Jiao, Yong Qi Luo, Ying Yu Zhou, Fengwei Huo
{"title":"Engineering Asymmetric MOF Composites toward High-Efficiency Catalytic Reactions","authors":"Suoying Zhang, Hang Li, Xiao han Huang, Yu Chen Wang, Fang yu Jiao, Yong Qi Luo, Ying Yu Zhou, Fengwei Huo","doi":"10.1039/d5ta07121f","DOIUrl":"https://doi.org/10.1039/d5ta07121f","url":null,"abstract":"Asymmetric metal-organic framework composites (AMOFs) have garnered increasing attention due to their distinctive functional properties, demonstrating considerable promise in catalysis, particularly as micro- and nano-structured catalysts. Nevertheless, a systematic understanding of AMOFs remains limited, especially regarding material selection and application-driven structural design. Moreover, achieving controllable synthesis of these materials continues to pose significant challenges. In this review, we present a comprehensive classification system and outline the core synthetic strategies for AMOFs. We also highlight their representative catalytic applications over the past decade. This work aims to enhance the understanding of AMOFs development, advance their catalytic applications, and identify key challenges in synthesis and design, along with potential directions for future optimization.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"199 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dual-Functional Defect Passivation in Dion-Jacobson Perovskite for Low-Dose X-ray Detection and Imaging","authors":"Xiaojuan Lu, Lin Lei, Changyao Zhou, Wanjia Tian, Ruihan Yuan, Wei Zhao, Jianguo Zhu, Xiaojia Zheng","doi":"10.1039/d5ta05319f","DOIUrl":"https://doi.org/10.1039/d5ta05319f","url":null,"abstract":"High-performance, low-dose X-ray imaging is crucial for medical diagnostics, security screening, and industrial inspection. Perovskite materials have received significant attention in the field of X-ray imaging in recent years. However, defects at grain boundaries and interfaces can lead to non-radiative recombination losses, which degrade the performance and stability of the devices. Herein, we develop an X-ray detector based on quasi-two-dimensional Dion-Jacobson (DJ) perovskite and incorporated 3-methylamino-tetrahydrofuran hydrochloride (3-MTHFA-HCl) medical intermediate as a dual-functional agent to passivate the defects in the device. This compound effectively passivates both Lewis acid defects and iodine vacancies within the perovskite lattice due to it multifunctional molecular structure with both electron-rich and electron-poor functional groups. As a result, optimized detector achieves a remarkable sensitivity of ~21,000 μC Gyair−1 cm−2 and an ultralow detection limit of 6.75 nGyair s−1 even at a low bias of 40 V. The flat-panel X-ray imager (FPXI) developed by integrating perovskites with thin-film transistor (TFT) backplane demonstrates a spatial resolution of 3.4 lp mm−1, delivering high-contrast imaging at low X-ray dose of ~10 μGyair. The capability to capture intricate internal structures of plants and electronic devices underscores the significant application potential of our FPXI in advanced imaging technologies.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"15 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shuang Qiu, Yangming Zou, xiaoyu gu, Jiang Jing, Jun Sun, Haiqiao Wang, Bin Fei, Sheng Zhang
{"title":"A Transparent, Flame-Retardant, and UV-Resistant Polycarbonate Panel with High Down-Conversion Efficiency Opens Up Possibilities for Lightweight Solar Cell Encapsulation Panel","authors":"Shuang Qiu, Yangming Zou, xiaoyu gu, Jiang Jing, Jun Sun, Haiqiao Wang, Bin Fei, Sheng Zhang","doi":"10.1039/d5ta06718a","DOIUrl":"https://doi.org/10.1039/d5ta06718a","url":null,"abstract":"Solar power, as a clean and renewable energy source, holds tremendous potential for future energy systems. This study presented lightweight, flame-retardant, and durable polycarbonate (PC) encapsulation panels incorporated with a fluorescent agent to substitute the glass covers in photovoltaic (PV) modules. A novel fluorescent derivative (TPA-BPOD), synthesized from triphenylamine and phenyl phosphonic dichloride, was doped into PC at a concentration of 0.5 wt%. The resulting PC panel (0.7 mm thickness) exhibited visible-light transmittance comparable to pure PC while effectively converting ultraviolet (UV) light to visible wavelengths. When applied to silicon solar cells as a front encapsulant, the PC+0.5% TPA-BPOD panel increased the power conversion efficiency (PCE) by 3.5%. Furthermore, the PC panel (1.6 mm thickness) demonstrated superior flame retardancy, achieving a UL-94 V-0 rating and a limiting oxygen index (LOI) of 28.8%, along with significantly suppressed release of toxic gases during combustion. After 360 h of accelerated UV aging (500 W, 60 °C), the PC+0.5% TPA-BPOD panel retained better mechanical properties than the undoped control, highlighting its improved durability. By enabling lightweight, safe, and efficiency-boosting PV encapsulation, this strategy supports the development of next-generation solar technologies, particularly in building-integrated or vehicle-integrated photovoltaics and flexible solar applications.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"1 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ziqiang Wang, Jiayao Chen, Yanan Wang, Hongjie Yu, You Xu, Kai Deng, Hongjing Wang, Liang Wang
{"title":"Synergistic electronic effect in high-entropy PdPtSnBiAg metallene for electrochemical reforming of PET plastics into glycolic acid","authors":"Ziqiang Wang, Jiayao Chen, Yanan Wang, Hongjie Yu, You Xu, Kai Deng, Hongjing Wang, Liang Wang","doi":"10.1039/d5ta05786h","DOIUrl":"https://doi.org/10.1039/d5ta05786h","url":null,"abstract":"The electrocatalytic transformation of polyethylene terephthalate (PET) plastic to valuable products represents highly promising strategy for the re-utilization of waste resources, and its efficiency is highly related to the identification of active and selective electrocatalysts. Herein, high-entropy PdPtSnBiAg metallene (HEA-PdPtSnBiAgene) is designed via a solvothermal method as an efficient electrocatalyst for PET-derived ethylene glycol oxidation reaction (EGOR). In PET hydrolysate, the HEA-PdPtSnBiAgene exhibits high Faraday efficiency of 91.8% at 0.91 V, as well as excellent cycle stability.Both experimental investigations and theoretical analyses support that the synergistic electronic effect of HEA-PdPtSnBiAgene provides multi-level active sites, which can reduce EGOR energy barrier and strengthen the C-C and O-H bond energy of EG, thus promoting the EG-to-GA conversion. This research contributes to advanced insights to develop unique high-entropy metallene for electrochemical upcycling of PET plastic.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"19 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Conductivity Enhancement of Argyrodite Li6SbS5I Solid Electrolyte via Charge Modulation Around Li Diffusion Paths Through Si Substitution","authors":"Seho Yi, Taegon Jeon, Jaeho Lee, Young-Kyu Han, Sung Chul Jung","doi":"10.1039/d5ta06686g","DOIUrl":"https://doi.org/10.1039/d5ta06686g","url":null,"abstract":"Aliovalent cation substitution in Li-argyrodite solid electrolytes for all-solid-state batteries has been reported to increase the conductivity by up to three orders of magnitude, but the mechanism underlying this enhancement remains unclear. This first-principles study examined Si-substituted Li6SbS5I (Li6+xSb1-xSixS5I) to clarify the origin of the dramatic increase in the conductivity of Liargyrodite achieved via cation substitution. When Si is substituted for Sb in the SbS4 tetrahedra of Li6SbS5I, Si donates more electrons to S, forming stable SiS4 tetrahedra, which greatly stabilizes the Li6+xSb1-xSixS5I system in proportion to the Si content. The electron-rich S ions in SiS 4 tetrahedra induce Li ions originally occupying the tetrahedral T5 site to also occupy the trigonal T5a and tetrahedral T2 sites. Importantly, the electron-rich S ions play a key role in reducing the diffusion barrier by stabilizing Li ions diffusing along the diffusion path involving the T5 site through favorable Li-S interactions, resulting in a remarkable increase in conductivity from 4.4 × 10-4 mS cm-1 when x = 0 to 15.4 mS cm-1 when x = 0.75. The Li ion transport in Li6+xSb1-xSixS5I proceeds via a concerted diffusion mechanism, regardless of the Si substitution. Thus, the increase in Li6+xSb1-xSixS5I conductivity with increasing x is due to the Si-induced changes in the charge state of S ions around the Li diffusion path, not the activation of concerted diffusion caused by the Si substitution as previously believed.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"26 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145153697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}