Materials Research Bulletin最新文献_第6页

Unveiling the redox-driven efficiency of SrFeO3 nanoplates in alkaline ethanol oxidation reactions 揭示SrFeO3纳米板在碱性乙醇氧化反应中的氧化还原驱动效率

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-31 DOI: 10.1016/j.materresbull.2025.113761

Sapna Devi, Sushma Kumari, Menaka Jha

{"title":"Unveiling the redox-driven efficiency of SrFeO3 nanoplates in alkaline ethanol oxidation reactions","authors":"Sapna Devi, Sushma Kumari, Menaka Jha","doi":"10.1016/j.materresbull.2025.113761","DOIUrl":"10.1016/j.materresbull.2025.113761","url":null,"abstract":"<div><div>Ethanol-fueled direct alcohol fuel cells (DAFCs) represent an efficient and environmentally friendly solution for advancing renewable energy technologies. Conventional DAFC systems, however, often depend on expensive noble metal electrocatalysts such as Pt and Pd, which are vulnerable to CO poisoning during ethanol oxidation. Perovskite oxides have emerged as promising alternatives due to their adjustable structures, low cost, and intrinsic electrocatalytic activity. In this study, we report the sol-gel synthesis of strontium ferrite (SrFeO<sub>3</sub>), a perovskite-based electrocatalyst, for DAFC applications. The synthesized SrFeO<sub>3</sub> achieves a peak current density of 4.83 mA cm<sup>−2</sup> at 1.50 V and demonstrates robust CO tolerance (tolerance factor ≈ 1.16). The excellent electrocatalytic performance is attributed to the presence of unusual oxidation of iron, which leads to oxygen vacancy and boost efficient ethanol oxidation. These findings underscore the potential of perovskite-based catalysts as durable, low-cost alternatives for alcohol fuel cells and advance the development of sustainable energy solutions.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113761"},"PeriodicalIF":5.7,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple synthetic LiCa(Yb,Nd)(WO4)3:Er up-conversion phosphor for photothermal conversion and thermometry applications 用于光热转换和测温应用的简单合成LiCa(Yb,Nd)(WO4)3:Er上转换荧光粉

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-30 DOI: 10.1016/j.materresbull.2025.113767

Yan Zhao , Yixiang Zhao , Haina Cui , Kaili Zhang , Hongjun Liu , Benjie Zou , Dengsheng Gao , Xusheng Wang

{"title":"Simple synthetic LiCa(Yb,Nd)(WO4)3:Er up-conversion phosphor for photothermal conversion and thermometry applications","authors":"Yan Zhao , Yixiang Zhao , Haina Cui , Kaili Zhang , Hongjun Liu , Benjie Zou , Dengsheng Gao , Xusheng Wang","doi":"10.1016/j.materresbull.2025.113767","DOIUrl":"10.1016/j.materresbull.2025.113767","url":null,"abstract":"<div><div>A bifunctional material LiCa(Yb,Nd)(WO<sub>4</sub>)<sub>3</sub>:Er with thermometry and photothermal conversion was synthesized by a simple one-step sintering method. The Nd<sup>3+</sup> co-doping not only enriched the UV–vis absorption peak, but also increased the particle layout in the highly excited state <sup>2</sup>H<sub>11/2</sub> of Er<sup>3+</sup>. A near-constant sensitivity of 0.01 K<sup>-1</sup> was obtained over a wide temperature range (30–480 °C) based on the fluorescence intensity ratio technique of the two thermal-coupled transitions of Er<sup>3+</sup> (<sup>2</sup>H<sub>11/2</sub>/<sup>4</sup>S<sub>3/2</sub> → <sup>4</sup>I<sub>15/2</sub>). More surprisingly, the sample exhibited excellent photothermal conversion characteristics under near-infrared excitation light. Under 980 or 808 nm excitation, the sample achieved an increase of temperature of 58 °C in 2 min, which is comparable to the core-shell nanostructures synthesized through multi-step complex procedures. Finally, a prototype device was used to demonstrate the feasibility of simultaneous heating and temperature measurement. The above results showed the potential application of the sample as both a thermometer and a photoheater.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113767"},"PeriodicalIF":5.7,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural evolution and strength development of circulating fluidized bed ash activated by Bayer red mud and semi-dry desulfurization ash 拜耳赤泥和半干脱硫灰活化循环流化床灰的微观结构演变及强度发展

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-29 DOI: 10.1016/j.materresbull.2025.113766

Xiaoyang Feng , Xiaojiao Li , Chuanlong Chen , Jin Yuan

{"title":"Microstructural evolution and strength development of circulating fluidized bed ash activated by Bayer red mud and semi-dry desulfurization ash","authors":"Xiaoyang Feng , Xiaojiao Li , Chuanlong Chen , Jin Yuan","doi":"10.1016/j.materresbull.2025.113766","DOIUrl":"10.1016/j.materresbull.2025.113766","url":null,"abstract":"<div><div>In this study, red mud (RM) and semi-dry desulfurization ash (SDA) were selected as representative alkaline and sulfate solid wastes, respectively, to investigate their synergistic effects on the reactivity of silica-alumina-rich circulating fluidized bed fly ash (CFB-FA). The influence of different solid waste ratios on the setting time and compressive strength of cementitious materials was evaluated. Furthermore, microscopic characterization was conducted using X-ray diffraction, fourier transform infrared, thermogravimetric analysis, and scanning electron microscopy. The experimental results demonstrated that the control group (without RM or SDA) exhibited a 28-day compressive strength of only 23.3 MPa, accompanied by prolonged setting times. While single doping SDA accelerated setting time, and single doping RM improved the 7-day compressive strength by 29.17 %, both approaches showed limitations. Specifically, the 28-day compressive strength of SDA-doped samples decreased by 51.50 %. Meanwhile, single doping RM extended the initial setting time. Notably, RM significantly enhanced early strength development. Compound doping of RM and SDA emerged as the optimal strategy. This approach substantially shortened setting times and improved 28-day strength. The optimal mass ratio (CFB-FA:SDA: RM = 1:3:2) achieved a 30 % enhancement in 28-day compressive strength compared to the control group. Mechanistically, the synergistic effects of RM and SDA included: activation of quartz in CFB-FA, promoting the formation of C/N-(A)-S-H gels; acceleration of Ca(OH)<sub>2</sub> participation in hydration reactions; facilitation of calcium sulfate in SDA to form hydration products; generation new hydration products such as calcite (CaCO<sub>3</sub>), which further enhanced mechanical performance through pore-filling and microstructure densification.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113766"},"PeriodicalIF":5.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eu3+ substituted Y2Mo4O15 nanophosphors for latent fingerprint detection and pc-LED applications Eu3+取代Y2Mo4O15纳米荧光粉用于潜在指纹检测和pc-LED应用

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-29 DOI: 10.1016/j.materresbull.2025.113764

A. Adhrija Siva Priya , Annamma John , Divya Vijayan , Aswathy A Mohan , Sam Solomon , H. Padma Kumar

{"title":"Eu3+ substituted Y2Mo4O15 nanophosphors for latent fingerprint detection and pc-LED applications","authors":"A. Adhrija Siva Priya , Annamma John , Divya Vijayan , Aswathy A Mohan , Sam Solomon , H. Padma Kumar","doi":"10.1016/j.materresbull.2025.113764","DOIUrl":"10.1016/j.materresbull.2025.113764","url":null,"abstract":"<div><div>A series of Eu<sup>3+</sup> substituted <span><math><mrow><msub><mi>Y</mi><mn>2</mn></msub><mi>M</mi><msub><mi>o</mi><mn>4</mn></msub><msub><mi>O</mi><mn>15</mn></msub></mrow></math></span> nanophosphors was successfully synthesized through combustion method. The structural details of the nanophosphors were confirmed through X-ray diffraction and vibrational spectroscopic studies. These studies reveal that the compounds exist in monoclinic structure with space group <span><math><mrow><mi>P</mi><msub><mn>2</mn><mn>1</mn></msub><mo>/</mo><mi>c</mi></mrow></math></span>. The optical properties of the nanophosphors were explored through diffuse reflectance spectroscopy and photoluminescence studies. Under the excitation of near UV light, Eu<sup>3+</sup> substituted <span><math><mrow><msub><mi>Y</mi><mn>2</mn></msub><mi>M</mi><msub><mi>o</mi><mn>4</mn></msub><msub><mi>O</mi><mn>15</mn></msub></mrow></math></span> phosphors showed emission in the red region. The intensity of red emission was tuned by varying the Eu<sup>3+</sup> concentration and the maximum emission intensity was obtained at <span><math><mrow><mi>x</mi><mo>=</mo><mn>0.5</mn></mrow></math></span>. The luminescence lifetime, correlated color temperature, color purity, chromaticity coordinates and quantum yield measurements suggested that the prepared nanophosphors are promising candidates for luminescence applications. Accordingly, the suitability of the optimized nanophosphor for detection of latent fingerprints and phosphor converted light emitting diode applications was investigated.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113764"},"PeriodicalIF":5.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ oxidation time dependent low-cost synthesis of cadmium iron oxide thin films for electronic and spintronic devices 用于电子和自旋电子器件的镉氧化铁薄膜的原位氧化时间依赖性低成本合成

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-29 DOI: 10.1016/j.materresbull.2025.113765

Hina Nazli , Fatima Ahtasham , Amir Razi , Zohra Nazir Kayani

{"title":"In-situ oxidation time dependent low-cost synthesis of cadmium iron oxide thin films for electronic and spintronic devices","authors":"Hina Nazli , Fatima Ahtasham , Amir Razi , Zohra Nazir Kayani","doi":"10.1016/j.materresbull.2025.113765","DOIUrl":"10.1016/j.materresbull.2025.113765","url":null,"abstract":"<div><div>Cadmium iron oxide (CdFe₂O₄) thin films were synthesized via electrodeposition. Five films were prepared with oxidation times ranging from 10 to 30 min to investigate the influence of oxidation time on their properties. X-ray diffraction revealed a well-ordered single-phase spinel structure, with crystallite size reaching 45.01 nm at an oxidation time of 25 min. Phase purity improved with increasing oxidation time, with optimal results at 25 min. FTIR spectra confirmed the spinel structure through two distinct absorption bands below 1000 cm⁻¹. SEM analysis showed interconnected cuboidal and polyhedral grains averaging 147.25 nm, consistent with early-stage grain growth. The 25 min oxidized film exhibited superior multifunctional performance, with a dielectric constant of 25.63 at 1 MHz, a maximum saturation magnetization of 30.27 emu/cm³, and coercivity of 654.28 Oe. These results highlight the potential of electrodeposited cadmium iron oxide thin films for integration into MRAM and electric-field-controlled magnetoelectric random-access memory (MeRAM) devices.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113765"},"PeriodicalIF":5.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing ionic conductivity in lithium lanthanum titanium oxysulfides through tetragonal phase formation 通过四方相形成增强氧化硫化锂镧钛的离子电导率

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-29 DOI: 10.1016/j.materresbull.2025.113763

Yun Bin Kim , Sangmoon Park

{"title":"Enhancing ionic conductivity in lithium lanthanum titanium oxysulfides through tetragonal phase formation","authors":"Yun Bin Kim , Sangmoon Park","doi":"10.1016/j.materresbull.2025.113763","DOIUrl":"10.1016/j.materresbull.2025.113763","url":null,"abstract":"<div><div>The lithium lanthanum titanium oxides (L<em><sub>x</sub></em>L<em><sub>y</sub></em>TO) and oxysulfides (L<em><sub>x</sub></em>L<em><sub>y</sub></em>TOS) were synthesized via a solid-state method for use as solid electrolytes in all-solid-state batteries. The powdered products exhibited perovskite-type structures, adopting hexagonal and tetragonal crystal systems using NH<sub>4</sub>F flux. Phase identification and unit cell parameters of the synthesized products, as influenced by the synthetic condition, were determined using X-ray diffraction analysis. The ionic conductivities of pressed LLTO-S pellets were measured using electrochemical impedance spectroscopy (EIS) over at temperature range of 50–150 °C, yielding values between 2.3 × 10<sup>–7</sup> and 2.9 × 10<sup>–5</sup> S/cm. The enhanced conductivity observed in L<em><sub>x</sub></em>L<em><sub>y</sub></em>TOS pellets was attributed to the presence of the tetragonal phase and the application of high annealing temperatures. The morphologies of L<em><sub>x</sub></em>L<em><sub>y</sub></em>TOS samples annealed at 1000 and 1200 °C were characterized, with particular focus on particle grain growth. To decouple bulk and interfacial contributions, bulk ionic conductivity was extracted via EIS using an equivalent circuit model.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113763"},"PeriodicalIF":5.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144919840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The critical role of porous lead iodide induced by a green solvent in two-step processed perovskite solar cells 绿色溶剂诱导多孔碘化铅在两步法钙钛矿太阳能电池中的关键作用

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-28 DOI: 10.1016/j.materresbull.2025.113760

Yixin Shi, Zicheng Liu, Tao Feng, Mingxing Gao, Pengfei Wang

引用次数: 0

Compressive strength, acoustic and aging piezoelectric properties of 1–3 and 2–2 connectivity lead-free BNBT piezoelectric ceramic/Portland cement composites for structural health monitoring applications 用于结构健康监测应用的1-3和2-2连接无铅BNBT压电陶瓷/波特兰水泥复合材料的抗压强度、声学和老化压电性能

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-28 DOI: 10.1016/j.materresbull.2025.113762

Ruamporn Potong , Supakporn Aodkeng , Arnon Chaipanich , Puripat Kantha , Naris Barnthip , Pratthana Intawin , Rattiyakorn Rianyoi

{"title":"Compressive strength, acoustic and aging piezoelectric properties of 1–3 and 2–2 connectivity lead-free BNBT piezoelectric ceramic/Portland cement composites for structural health monitoring applications","authors":"Ruamporn Potong , Supakporn Aodkeng , Arnon Chaipanich , Puripat Kantha , Naris Barnthip , Pratthana Intawin , Rattiyakorn Rianyoi","doi":"10.1016/j.materresbull.2025.113762","DOIUrl":"10.1016/j.materresbull.2025.113762","url":null,"abstract":"<div><div>1–3 and 2–2 connectivity lead-free 0.94Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>–0.06BaTiO<sub>3</sub> (BNBT) ceramic/Portland cement composites were designed and fabricated for use as sensors in structural health monitoring applications. This study investigates the effects of BNBT content and composite connectivity on compressive strength, acoustic, and aging piezoelectric properties, with the aim of optimizing composite performance. Composites containing 40–70 vol% BNBT were prepared using cut-and-fill technique. The highest measured values of d<sub>33</sub> and g<sub>33</sub> were 115 pC/N and 26.07 × 10⁻<sup>3</sup> Vm/N, respectively. The results demonstrate that increasing BNBT content and employing 2–2 connectivity enhance the compressive strength of the composites, with 2–2 composites showing superior performance compared to 1–3 composites. All composites exhibited higher compressive strength than concrete. The composite with ∼40 vol% BNBT showed good compatibility with concrete. Between 1 to 60 days of aging, the <em>g</em><sub>33</sub> values of composites remained higher than those of standalone BNBT ceramic, highlighting a notable advantage of composite design.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113762"},"PeriodicalIF":5.7,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing the concentration quenching mechanism of oxygen ion conduction in Sm3+-doped CeO2 via photoluminescence 通过光致发光揭示Sm3+掺杂CeO2中氧离子传导的浓度猝灭机制

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-27 DOI: 10.1016/j.materresbull.2025.113758

Xiaoou Sun , Jinhua Li , Duanting Yan

{"title":"Revealing the concentration quenching mechanism of oxygen ion conduction in Sm3+-doped CeO2 via photoluminescence","authors":"Xiaoou Sun , Jinhua Li , Duanting Yan","doi":"10.1016/j.materresbull.2025.113758","DOIUrl":"10.1016/j.materresbull.2025.113758","url":null,"abstract":"<div><div>Probing local lattice distortions in acceptor-doped CeO<sub>2</sub> oxygen ion conductors is important to understanding ionic conduction mechanism and improving performance. Dense Ce<sub>1-x</sub>Sm<sub>x</sub>O<sub>2-δ</sub> (SDC) oxygen ion conductors were synthesized. AC impedance shows that <em>x</em> = 0.10 yields the highest bulk conductivity (8 mS/cm at 500 °C), surpassing reported values. Raman results indicate a monotonic increase in defect association between oxygen vacancies and Sm<sup>3+</sup> with doping. We propose a spectral probe strategy using Sm<sup>3+</sup> photoluminescence to detect local lattice distortions in SDC. Photoluminescence shows local lattice distortion decreases then increases with Sm<sup>3+</sup> content, with <em>x</em> = 0.05 lowest, explaining the activation energy of bulk conduction trend, then revealing the structural origin of bulk conductivity quenching. Furthermore, photoluminescence analysis shows that higher Sm<sup>3+</sup> levels also increase disorder around Ce<sup>4+</sup> and Sm<sup>3+</sup>. This photoluminescence strategy offers a sensitive tool for probing local lattice distortions and can be extended to other materials with Sm<sup>3+</sup>-doping available.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113758"},"PeriodicalIF":5.7,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Fe3C/VN/C composites through pyrolysis mixture of iron-vanadium precursor and melamine in inert gas for a supercapacitor electrode 超级电容器电极用铁钒前驱体与三聚氰胺在惰性气体中热解合成Fe3C/VN/C复合材料

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-08-27 DOI: 10.1016/j.materresbull.2025.113759

Yuan Zhang , Yongtao Tan , Fengwei Tuo , Haorui Liu , Ning Mi , Jiantie Xu

{"title":"Synthesis of Fe3C/VN/C composites through pyrolysis mixture of iron-vanadium precursor and melamine in inert gas for a supercapacitor electrode","authors":"Yuan Zhang , Yongtao Tan , Fengwei Tuo , Haorui Liu , Ning Mi , Jiantie Xu","doi":"10.1016/j.materresbull.2025.113759","DOIUrl":"10.1016/j.materresbull.2025.113759","url":null,"abstract":"<div><div>Vanadium nitride (VN) has attracted significant attention as a promising electrode material for supercapacitors mainly owing to its high theoretical specific capacitance and broad electrochemical stability window. However, poor cycling stability caused by dissolution in alkaline electrolyte largely restricts its practical applications. Herein, a series of heterojunction Fe<sub>3</sub>C/VN/C-<em>x</em> composites were synthesized <em>via</em> a one-step pyrolysis strategy for pyrolysis mixture of iron-vanadium precursor and melamine at 700 °C for 2 h. Among the series, the optimized Fe<sub>3</sub>C/VN/C-2 exhibits a high specific capacitance of 291.2 F g<sup>-1</sup> at 0.5 A g<sup>-1</sup>, which is 2.7 times higher than pristine VN with 108.3 F g<sup>-1</sup>. Moreover, the Fe<sub>3</sub>C/VN/C-2 enables asymmetric supercapacitor device (Ni(OH)<sub>2</sub>||Fe<sub>3</sub>C/VN/C-2) achieving a high energy density of 14.9 Wh kg<sup>-1</sup> with high power density of 400.1 W kg<sup>-1</sup> and a high power density of 3998.6 W kg<sup>-1</sup> with an energy density of 6.2 Wh kg<sup>-1</sup>, and retaining 92.7 % of its initial capacitance after 10,000 cycles (17.2 F g<sup>-1</sup>). The enhanced electrochemical performance of Fe<sub>3</sub>C/VN/C-2 is attributed to the synergistic effect of the heterojunction and carbon matrix, which suppress vanadium dissolution and accelerate charge transfer kinetics.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113759"},"PeriodicalIF":5.7,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0