Materials Today Physics最新文献

{"title":"Direct evidence of mixed-phase induced anomalous thermal transport in hybrid perovskite single crystals","authors":"Yuting Yu ,&nbsp;Gan Zhang ,&nbsp;Zifeng He ,&nbsp;Jing Tu ,&nbsp;Ankit Jain ,&nbsp;Jonathan A. Malen ,&nbsp;Derya Baran ,&nbsp;Yee Sin Ang ,&nbsp;Shusheng Xiong ,&nbsp;Dawei Di ,&nbsp;Wee-Liat Ong","doi":"10.1016/j.mtphys.2026.102107","DOIUrl":"10.1016/j.mtphys.2026.102107","url":null,"abstract":"<div><div>The thermal conductivity of crystalline semiconductors is critical for their optoelectronic performance and is commonly described by the classical phonon gas model. Here, we report a clear violation of this conventional behavior during the phase transition of methylammonium lead bromide (MAPbBr₃) perovskite single crystals. Through transient frequency domain thermoreflectance experiments, an anomalous kink in thermal conductivity between 170 and 220 K is observed, disrupting the usual monotonic decrease with increasing temperature above the Debye temperature. Temperature-dependent X-ray diffraction (TDXRD) experiments reveal that a mixed orthorhombic-tetragonal phase exists in MAPbBr₃ from 140 K to 210 K. By combining TDXRD with phonon Wigner transport equation calculations, the origin of this anomalous thermal conductivity kink is attributed to two causes: the differences in the phonon properties between the tetragonal and orthorhombic phases and an increasing proportion of the tetragonal phase at increasing temperature. The notable differences in the phonon properties between these two phases, coupled with the potential differences in the properties of the charge carriers, can dramatically impact the optoelectronic performance of hybrid perovskites. Importantly, a similar kink is also observed within methylammonium lead chloride, suggesting such mixed-phase-induced thermal transport properties may be applicable to a broader class of perovskite semiconductors.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102107"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147726408","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":"Stress-mediated formation of mossy structure during zinc electrodeposition in alkaline electrolytes for zinc-air batteries","authors":"Yavuz Savsatli ,&nbsp;Faizal Arifurrahman ,&nbsp;Bongki Shin ,&nbsp;Andrew Hitt ,&nbsp;Fan Wang ,&nbsp;Hua Guo ,&nbsp;Zeyuan Li ,&nbsp;Jun Lou ,&nbsp;Yimo Han ,&nbsp;Harsh Agarwal ,&nbsp;Ryan Stephens ,&nbsp;Ming Tang","doi":"10.1016/j.mtphys.2026.102102","DOIUrl":"10.1016/j.mtphys.2026.102102","url":null,"abstract":"<div><div>Zinc metal batteries are promising low-cost and environmentally benign alternatives to lithium-ion batteries, but their practical development is hindered by morphological instabilities such as the formation of mossy zinc during electrodeposition. Despite extensive studies of zinc deposition, the role of mechanical stress in moss formation remains poorly understood. Here, we investigate the evolution of plating stress during zinc electrodeposition in alkaline electrolytes using in-situ stress measurements combined with structural characterization. Zinc deposition is found to generate large compressive stress reaching ∼140 MPa at 5 mA cm⁻², significantly higher than that observed in other electrodeposited metals. The onset of mossy growth coincides with an apparent relaxation of the measured stress. Experiments comparing deposition on hard and soft substrates show that relieving plating stress reduces the nucleation density of moss colonies but does not inhibit their subsequent growth, indicating that stress primarily influences filament nucleation rather than growth. Transmission electron microscopy reveals that moss filaments are single crystalline and grow along non-[0001] directions, with their side surfaces passivated by a crystalline ZnO layer. Based on these observations, we propose a stress-mediated nucleation mechanism, in which compressive stress suppresses adatom incorporation into grain boundaries and promotes the formation of non-[0001]-oriented crystallites that serve as filament precursors. Unlike lithium metal deposition, where stress can directly drive filament extrusion, zinc moss growth proceeds predominantly through tip deposition and is therefore insensitive to stress relief. These findings provide new insights into the origin of mossy zinc formation and highlight the limitations of stress-relief strategies for stabilizing zinc metal anodes in alkaline battery systems.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102102"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708791","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":"Salt-confined hierarchical porous carbons for efficient solar-driven atmospheric water harvesting","authors":"Lu Yin ,&nbsp;Xiaojiang Mu ,&nbsp;Hongxia Luo,&nbsp;Yitong Wang,&nbsp;Fan Zhang,&nbsp;Zhimiao Lu,&nbsp;Xiaoyang Wang,&nbsp;Lei Miao","doi":"10.1016/j.mtphys.2026.102109","DOIUrl":"10.1016/j.mtphys.2026.102109","url":null,"abstract":"<div><div>Atmospheric water harvesting (AWH) based on sorption-desorption cycles offers a viable route for decentralized freshwater production, yet its efficiency is often limited by the trade-off between water uptake, vapor transport, and energy-efficient regeneration. Herein, a series of chitosan-derived, salt-confined hierarchical porous carbons (PCa-X) are prepared via freeze-drying, CaCl₂ impregnation, and carbonization, enabling coordinated regulation of pore architecture, surface polarity, and photothermal behavior. Moderate CaCl₂ loading induces an interconnected hierarchical pore network with uniformly confined hygroscopic sites, whereas excessive salt incorporation leads to partial pore densification and restricted vapor accessibility. The optimized PCa-20 exhibits rapid water-vapor uptake across a wide humidity range, achieving 0.35, 0.75, and 1.2 g g⁻¹ at 30%, 60%, and 90% relative humidity, respectively. Owing to its defect-rich carbon framework, PCa-20 shows efficient solar-driven heating, reaching surface temperatures of ∼85 °C under 2.0 kW m⁻² irradiation and enabling fast, reversible water release. Outdoor tests demonstrate autonomous day-night operation with an average daily water collection of ∼1.24 g g⁻¹ and negligible Ca²⁺ leaching. This work provides a scalable strategy for practical AWH through salt-confined photothermal porous carbons.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102109"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147799737","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":"Robust superconducting stability realized in ternary lanthanum superhydride under high pressure","authors":"Dawei He ,&nbsp;Xindeng Lv ,&nbsp;Yu Huang ,&nbsp;Qinghong Gu ,&nbsp;Weihao Jia ,&nbsp;Yunfeng She ,&nbsp;Jie Fu ,&nbsp;Yanping Huang ,&nbsp;Tian Cui","doi":"10.1016/j.mtphys.2026.102106","DOIUrl":"10.1016/j.mtphys.2026.102106","url":null,"abstract":"<div><div>Ternary hydrides currently remain a powerful platform for exploring superconductors with superior properties. Beyond achieving superior superconducting properties, such as a high upper critical magnetic field [<em>μ</em>₀<em>H</em>_<em>c</em>2(0)], also offer great possibility for future practical applications. In this work, we successfully synthesized the ternary hydride <em>C</em>2/<em>m</em>-(La, Hf)H₁₀ under moderate pressure with excellent properties. High-pressure electrical transport measurements reveal that <em>C</em>2/<em>m</em>-(La, Hf)H₁₀ exhibits a maximum superconducting transition temperature (<em>T</em>_c) of 240 K at 162 GPa. Notably, with the incorporation of Hf atom, the <em>μ</em>₀<em>H</em>_<em>c</em>2(0) reaches 352 T at 150 GPa, representing a 164% enhancement over LaH₁₀. Based on fits of the available magnetic measurement data using the WHH model, the extrapolated <em>μ</em>₀<em>H</em>_<em>c</em>2(0) value for the La-Hf-H system stands among the highest reported for hydride superconductors characterized by this method. This study reports the synthesis of the <em>C</em>2/<em>m</em> phase in ternary lanthanum-based hydrides, a process that does not rely on the decompression-induced transformation of the cubic phase. This finding provides a new approach for modulating the superconducting properties of hydrides. The results demonstrate that moderate doping with heavy elements can break through the bottleneck of the upper critical magnetic field while maintaining a high <em>T</em>_c, offering crucial experimental evidence and design concept for developing high-performance superconducting materials.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102106"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851887","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":"Progress in passive daytime radiative cooling of fibers and textiles","authors":"Gang Li ,&nbsp;Yanan Shen ,&nbsp;Yuchang Xue ,&nbsp;Zining Xue ,&nbsp;Chenggang Li ,&nbsp;Pengyu Zhang ,&nbsp;Xiao Yang ,&nbsp;Yujie Xu ,&nbsp;Xinghua Zheng ,&nbsp;Haisheng Chen ,&nbsp;Ting Zhang","doi":"10.1016/j.mtphys.2026.102115","DOIUrl":"10.1016/j.mtphys.2026.102115","url":null,"abstract":"<div><div>Excessive carbon emissions from energy consumption intensify the greenhouse effect and increase the frequency of extreme heat events, posing health risks to individuals engaged in daytime outdoor activities. Consequently, energy-free personal thermal management technologies have attracted growing attention. Passive daytime radiative cooling (PDRC) is a cooling method that provides high solar reflectance during the day and utilizes an object's intrinsic thermal radiation to emit its own energy into outer space (∼3 K) without consuming any external energy. In recent years, significant advances in PDRC have been reported in applications including buildings, electronic devices, and personal thermal management. However, systematic reviews focusing on PDRC textiles remain limited, and many laboratory-developed systems still fall short of practical cooling requirements. Herein, we introduce the fundamental principles of PDRC and summarize recent progress in wearable PDRC textiles from the perspective of fiber fabrication techniques, with particular emphasis on material selection and structural design strategies. Furthermore, key challenges in textile applications are discussed, and thermal drawing is highlighted as a promising strategy for constructing micro/nanostructures, offering a scalable route toward sustainable and multifunctional radiative cooling fibers.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102115"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147755076","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":"Multifunctional shape memory composites for excellent microwave absorption at Ku band","authors":"Fang Ren ,&nbsp;Dandan Zhang ,&nbsp;Tong Wu ,&nbsp;Lunwu Wang ,&nbsp;Ze Zong ,&nbsp;Miao Liu ,&nbsp;Zhengzheng Guo ,&nbsp;Lingxiao Zhang ,&nbsp;Yanling Jin ,&nbsp;Siyu Wang ,&nbsp;Dingxiang Yan ,&nbsp;Penggang Ren","doi":"10.1016/j.mtphys.2026.102108","DOIUrl":"10.1016/j.mtphys.2026.102108","url":null,"abstract":"<div><div>Traditional microwave-absorbing materials (MAMs) are mostly sprayed onto the surfaces of protected objects, generally inflexible, high manufacturing costs, especially limited adaptability to complex and changing operational environments. Therefore, it is imperative to design novel MAMs to overcome the above challenges. In this work, we develop a thermally-driven shape memory foam based on MXene/MWCNT-Co@C/polycaprolactone(PCL), which exhibits excellent microwave absorption performance. MXene and MWCNT-Co@C hybrids are semi-embedded in the skeleton of PCL foam, which is prefabricated by using a salt-templating method. Leveraging the shape memory effect of PCL, the dielectric-magnetic synergy of MXene/MWCNT-Co@C, and a unique semi-embedded porous structure, the composite foam exhibits excellent microwave absorption performance, with a relatively thin thickness of 1.98 mm and a broad effective absorption bandwidth (EAB) of 4.6 GHz. The optimal radar cross-section (RCS) reduction reaches 37.9 dB m² at a detection angle of 0°. Notably, the shape memory capability of PCL enables the material to adapt its configuration to the incidence angle of electromagnetic waves (EMWs), thereby maximizing wave absorption. Such intelligent microwave-absorbing materials show promising potential for applications in adaptive stealth skins, tunable electromagnetic shielding, and related fields.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102108"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147799728","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":"High sensitivity and ultra-low detection limit of Visible-NIR photodetectors based on InSe/2D Ruddlesden–Popper perovskite van der Waals heterostructure","authors":"Zebin Guo ,&nbsp;Haojie Lai ,&nbsp;Weizhi Yu ,&nbsp;Yuxin Yang ,&nbsp;Xin Xu ,&nbsp;Hai Zhou","doi":"10.1016/j.mtphys.2026.102112","DOIUrl":"10.1016/j.mtphys.2026.102112","url":null,"abstract":"<div><div>The scarcity of stable p-type two-dimensional (2D) materials hinders the realization of high-performance 2D van der Waals (vdW) heterostructure devices. Layered 2D Ruddlesden-Popper perovskite (2DRP) materials have emerged as an ideal platform for fabricating vdW heterojunctions owing to their high hole mobility, tunable band structure, and strong interfacial dipole fields. In this work, we first adopt 2D (BA)₂MA₂Pb₃I₁₀ perovskite to construct a 2DRP/InSe van der Waals heterostructure photodetector, which achieves an ultra-broadband response (405 nm to 1550 nm) with a remarkably low dark current (∼10⁻¹⁰ A). At 405 nm, it exhibits a high detectivity of 8.7 × 10¹² Jones and responsivity of 96.5 A/W with a detection limit of 5.96 μW/cm². These values are comparable to those of the best van der Waals heterostructure photodetectors, we attribute this to the 2DRP, which as an inducing electron layer, induces electrons from 2D materials to enter the perovskite, forming p-type doping, thereby forming a built-in electric field, ultimately reducing the dark current of the device and optimizing the carrier transport of the device. Based on this principle, we also constructed a heterojunction using this 2D perovskite and other n-type two-dimensional semiconductors (MoS₂, α-In₂Se₃ and WS₂), achieving consistent results. This strategy provides a promising pathway for next-generation, high-performance, broadband, and low-power photodetectors.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102112"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147799348","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":"A novel strategy for online catalytic synthesis and performance efficacy of Mannich base corrosion inhibitors for oilfield acidization","authors":"Yi Luo ,&nbsp;Qiongwei Li ,&nbsp;Jian Li ,&nbsp;Yingxue Bai ,&nbsp;Haitao Bai ,&nbsp;Yefei Wang ,&nbsp;Gang Chen ,&nbsp;Ying Tang","doi":"10.1016/j.mtphys.2026.102114","DOIUrl":"10.1016/j.mtphys.2026.102114","url":null,"abstract":"<div><div>This study proposes an innovative online synthesis strategy for Mannich base corrosion inhibitors to address key challenges in oilfield acidizing, including lengthy synthesis times, transportation inefficiencies, and the risk of inhibitor deactivation. By directly introducing ethanolamine, acetone, and formaldehyde into the acidizing fluid (3 wt% HCl), the target inhibitor is formed online under acidic conditions. Real-time electrochemical monitoring indicates that the system achieves corrosion-inhibition performance comparable to that of pre-synthesized inhibitors within 5 h. Comprehensive evaluations, including potentiodynamic polarization, electrochemical impedance spectroscopy, weight-loss measurements, and structural characterization by FTIR and MS, confirm both the formation and effectiveness of the inhibitor. The inhibitor acts as a cathodic-type mixed inhibitor, forming a hydrophobic protective film on Q235 steel through chemisorption and following the Langmuir adsorption isotherm (ΔGads ≈ −40.32 kJ mol⁻¹). Molecular dynamics simulations further reveal strong adsorption on the Fe(001) surface, with an adsorption energy of −48.07 kJ mol⁻¹ and a parallel molecular orientation. Economic analysis demonstrates substantial cost savings, reducing the cost to 3900 ¥/ton by eliminating separate synthesis steps and increasing the active ingredient concentration by a factor of four. This strategy offers an efficient and economical approach to corrosion protection in oilfield applications.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102114"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851495","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":"Direct heat-free synthesis of graphene on copper for high-ampacity interconnects","authors":"Jiayao Chen ,&nbsp;Yifeng Zhao ,&nbsp;Wentao Yuan ,&nbsp;Zhiyuan Shi ,&nbsp;Zhihao Zheng ,&nbsp;Jiaping Liang ,&nbsp;Qingkai Yu ,&nbsp;Xiaoming Xie","doi":"10.1016/j.mtphys.2026.102116","DOIUrl":"10.1016/j.mtphys.2026.102116","url":null,"abstract":"<div><div>The low-temperature synthesis of graphene is of great significance for its integration and application in integrated circuits or flexible devices. However, the challenge remains to directly grow few-layered graphene on the target substrate using off-the-shelf carbon sources without programmable heating. Here, we propose a strategy to use commercial graphite papers as the carbon source with plasma bombardment to produce activated carbon species, and few-layered graphene grows on Cu films/lines without additional heating. In contrast, conventional methane as the precursor does not yield graphene under the same conditions. Furthermore, this strategy is applied to Cu lines, and the electrical properties of graphene-skinned Cu lines are improved compared with annealed Cu lines: a 28.2% increase in breakdown current density and a 68.7% decrease in resistivity. The work provides a feasible strategy for graphene growth at low temperature, which would promote the integration and application of graphene in fields of temperature-sensitive fields.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102116"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851886","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":"Coupled vacancy-anion tuning activates fast Li-ion transport in mixed-anion lithium nitrides toward Li8ChN2 (Ch = Se, Te) and beyond","authors":"Lulu Tian ,&nbsp;Qiang Bai","doi":"10.1016/j.mtphys.2026.102118","DOIUrl":"10.1016/j.mtphys.2026.102118","url":null,"abstract":"<div><div>Nitride-based solid electrolytes are promising for all-solid-state lithium metal batteries thanks to their intrinsic thermodynamic stability against Li metal. A distinctive feature of lithium nitrides is the prevalence of mixed-anion compositions, where Li⁺ transport is often vacancy-mediated. While charge neutrality couples anion substitution to Li nonstoichiometry, the resulting structure-property relationship between defect chemistry, lattice response, and Li⁺ diffusion mechanism remains insufficiently resolved. Moreover, the atomistic interfacial structure and Li⁺ transport kinetics at the Li metal||nitride interface remain elusive. Here, we use Li₈ChN₂ (Ch = Se, Te) as a model framework to explore composition-dependent Li⁺ transport physics and clarify how this coupled defect chemistry governs Li⁺ mobility and pathway connectivity by combining first-principles calculations and large-scale machine-learned molecular dynamics (MD). While pristine Li₈ChN₂ exhibit negligible Li⁺ diffusion, coupled anion-vacancy tuning in Li_8-<em>x</em>Ch_1+<em>x</em>N_2-<em>x</em> activates facile Li⁺ conduction. This tuning simultaneously reduces Li-Li electrostatic constraints and weakens Li-anion binding. These effects soften the lattice, leading to a smaller restoring force and a corresponding reduced potential curvature, which in turn flattens the migration landscape and transforms Li⁺ motion from localized intra-cage hopping into a long-range three-dimensional percolation network. We identify a downshift of Li-projected phonon modes as a spectral fingerprint of defect-governed transport. Large-scale MD simulations show that Li metal||Li_7.5Se_1.5N_1.5 interfaces remain structurally stable and support rapid Li⁺ migration in both in-plane and cross-plane directions. Extending this tuning motif across representative mixed-anion nitrides yields consistent interaction weakening and conductivity enhancement, suggesting a general physical mechanism. Our findings highlight the crucial role of lithium offstoichiometry and defect chemistry in enhancing Li⁺ transport and provide insights for the rational design of mixed-anion nitrides as solid electrolytes.</div></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"64 ","pages":"Article 102118"},"PeriodicalIF":9.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851885","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}