Solid State Sciences最新文献

{"title":"Syntheses, crystal structures, and physical properties of three new chalcospinels: Ag2Sc2Sn2S8, Cu1.9(1)Sc1.9(1)Sn2.1(1)S8, and Cu1.4(1)Sc1.4(1)Sn2.6(1)Se8","authors":"Omair Shahid,&nbsp;Jai Prakash","doi":"10.1016/j.solidstatesciences.2025.107910","DOIUrl":"10.1016/j.solidstatesciences.2025.107910","url":null,"abstract":"<div><div>The present work describes the syntheses of three new chalcogenides, Ag₂Sc₂Sn₂S₈, Cu_1.9(1)Sc_1.9(1)Sn_2.1(1)S₈, and Cu_1.4(1)Sc_1.4(1)Sn_2.6(1)Se₈ with disordered spinel structures (space group: <em>Fd</em><span><math><mrow><mover><mn>3</mn><mo>‾</mo></mover></mrow></math></span><em>m</em>) as established from single crystal X-ray diffraction studies. As expected, the unit cell volume of the cubic Ag₂Sc₂Sn₂S₈ (<em>a</em> = 10.722(4) Å) structure is bigger than that of the Cu-containing sulfide Cu_1.9(1)Sc_1.9(1)Sn_2.1(1)S₈ (<em>a</em> = 10.4431(3) Å). Similarly, the refined <em>a</em>-lattice constant of 10.8961(10) Å for the Cu_1.4(1)Sc_1.4(1)Sn_2.6(1)Se₈ structure is longer than the sulfide Cu_1.9(1)Sc_1.9(1)Sn_2.1(1)S₈. These structures are based on cubic close packing of chalcogen atoms (S/Se) where the Sc and Sn atoms co-occupy the same octahedral sites, unlike the Cu/Ag atoms, which are distributed over the tetrahedral sites in the title structures. A phase pure polycrystalline selenide with the loaded composition of Cu_1.4Sc_1.4Sn_2.6Se₈ was prepared by a high-temperature reaction of elements at 1223 K. The polycrystalline samples with the loaded compositions of Cu_1.9Sc_1.9Sn_2.1S₈ and Ag₂Sc₂Sn₂S₈ were biphasic, consisting of the target spinel and SnS phases. The resistivity, Seebeck coefficient, and optical absorption studies show that the polycrystalline Cu_1.4Sc_1.4Sn_2.6Se₈ is an <em>n</em>-type semiconductor with a direct bandgap of 1.0(1) eV. The magnitude of the Seebeck coefficient value of the Se-sample varies from 122 μV/K (at 773 K) to 185 μV/K (at 573 K). The Se-sample shows a relatively high thermal conductivity (<em>κ</em>_<em>tot</em>) value of 1.75 Wm⁻¹K⁻¹ near room temperature, which drops to a low value of 0.77 Wm⁻¹K⁻¹ at 773 K. The biphasic samples, Cu_1.9Sc_1.9Sn_2.1S₈ and Ag₂Sc₂Sn₂S₈, also show semiconducting behavior from the resistivity and optical absorption studies.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107910"},"PeriodicalIF":3.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, thermal and electrical properties of the ceramics in the NdBaFe2/3Co2/3Cu2/3O6–δ–NdSrFe2/3Co2/3Cu2/3O6–δ system","authors":"Yana Yu Zhuravleva ,&nbsp;Andrei I. Klyndyuk ,&nbsp;Ekaterina A. Tugova ,&nbsp;Nikolai N. Gundilovich ,&nbsp;Maria V. Tomkovich","doi":"10.1016/j.solidstatesciences.2025.107906","DOIUrl":"10.1016/j.solidstatesciences.2025.107906","url":null,"abstract":"<div><div>Using ceramic method, the continuous serie of NdBa_{1–<em>x</em>}Sr_<em>x</em>Fe_2/3Co_2/3Cu_2/3O_6–δ (0.0 ≤ <em>x</em> ≤ 1.0) (NBS) solid solutions was prepared, their crystal structure, microstructure, oxygen nonstoichiometry, thermal expansion, electrical conductivity, and Seebeck coefficient were studied. It was found, that NBS compounds possessed perovskite-like structure and were <em>p</em>-type semiconductors, which lattice constants, oxygen nonstoichiometry index (δ), and Seebeck coefficient decreased, but electrical conductivity increased at substitution of barium by strontium. Near <em>x</em> ≈ 0.5 the phase transition from tetragonal phase into cubic one took place. The complex oxides with composition near this point (<em>x</em> = 0.4, 0.6) were possessed the lowest sinterability, had maximal microstrains, and minimal microhardness and values of grain sizes among the samples studied. Thermal and chemical expansion coefficients of NBS samples varied within (15.3–17.2)·10⁻⁶ K⁻¹ and (0.94–17.0)·10⁻³ respectively, and, all in all, increased by <em>x</em> rising. The largest value of electrical conductivity (σ₈₀₀ ≈ 290 S·cm⁻¹) was fixed for the NdBa_0.2Sr_0.8Fe_2/3Co_2/3Cu_2/3O_6–δ solid solution.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107906"},"PeriodicalIF":3.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of P-doped g-C3N4/CuBi2O4 as a new heterogeneous nanocomposite for photocatalytic reduction of nitroaromatic compounds","authors":"Elham Hosseinian,&nbsp;Ali Oji Moghanlou,&nbsp;Farshid Salimi Nanekaran,&nbsp;Behnam Khanizadeh,&nbsp;Nayer Mohammadian Tarighi","doi":"10.1016/j.solidstatesciences.2025.107897","DOIUrl":"10.1016/j.solidstatesciences.2025.107897","url":null,"abstract":"<div><div>In this research, the carbon substrate of graphitic carbon nitride was synthesized by polymerization route, and at the same time phosphorus element was successfully doped in its structure. Then CuBi₂O₄ nanoparticles were coupled and decorated on the layers of g-C₃N₄. Morphology, structural properties, and photocatalytic activity of the new heterogeneous nanocomposites (P-doped g-C₃N₄/CuBi₂O₄) were identified and evaluated using different and suitable spectroscopic and imaging methods. The synthesized nanocomposites were used as photocatalysts in the reduction of nitroaromatic compounds, which had high photocatalytic activity so that the conversion of nitrobenzene to aminobenzene (aniline) had a 100 % yield within 60 min. In the above reactions, hydrazine monohydrate was used as a hydrogen supplier. P-doped g-C₃N₄/CuBi₂O₄ photocatalyst had high recyclability and reusability. So after seven reuses, no measurable change was observed in the amount of nanocomposite and the rate of reaction efficiency.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107897"},"PeriodicalIF":3.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights on the electrooxidation of formaldehyde over bimetallic Co2V2O7 nanorod and its implication towards water electrolysis","authors":"S. Ashoka ,&nbsp;H.M. Akshaya ,&nbsp;M. Shirisha ,&nbsp;N.S. Venkataramanan ,&nbsp;K. Yogesh ,&nbsp;Narayana Sanaga ,&nbsp;R.T. Yogeeshwari","doi":"10.1016/j.solidstatesciences.2025.107903","DOIUrl":"10.1016/j.solidstatesciences.2025.107903","url":null,"abstract":"<div><div>Potential electrocatalytic system based on monoclinic Co₂V₂O₇ nanorods (Co₂V₂O₇ NRs) is proposed to realize formaldehyde (H₂CO) assisted green hydrogen production at ultra-low overpotential in an alkaline electrolyte. The mechanistic knowledge of H₂CO assisted hydrogen production over Co₂V₂O₇ NR surface is gained by the combination of experimental and density functional theory. The computational studies confirm that the Co₂V₂O₇ surface exhibit highest adsorption energy of −0.185 eV towards H₂CO oxidation compared to V₂O₅ (−0.144 eV) and Co₃O₄ (−0.108 eV). The Co₂V₂O₇ NRs renders kinetically more favorable surface for selective oxidation of H₂CO (SOF) compared to its counterparts Co₃O₄ and V₂O₅. The SOF over Co₂V₂O₇ NR surface results in green hydrogen at ultra-low overpotential and high-valued low-cost chemical formic acid. The Co₂V₂O₇ NRs exhibit an ultra-low onset potential of 1.26 V vs RHE towards FOR in three electrode configuration while Co₂V₂O₇ NRs || Co₂V₂O₇ cell needs a low cell potential of only 1.48 V at 10 mA cm⁻² in H₂CO assisted hydrogen production. The proposed research opens a new way to treat H₂CO contaminated water with simultaneous production of green hydrogen.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107903"},"PeriodicalIF":3.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermoelectric properties of Zn/Sc codoped GeTe prepared by melt-spinning method","authors":"Lin Cheng ,&nbsp;Hongxia Liu ,&nbsp;Lu Gao ,&nbsp;Lijun Zhai ,&nbsp;Junsong He ,&nbsp;Zhongyuan Yang ,&nbsp;Minghao Lv ,&nbsp;Yan Zhang ,&nbsp;Zhigang Sun","doi":"10.1016/j.solidstatesciences.2025.107904","DOIUrl":"10.1016/j.solidstatesciences.2025.107904","url":null,"abstract":"<div><div>GeTe thermoelectrics have received widespread attention due to their excellent thermoelectric performance. In this paper, GeTe samples are prepared by a melt spinning process combined with hot-pressing. The samples have a lower carrier concentration compared to those prepared by the traditional melting method, and the enhanced grain boundary scattering leads to a reduction in thermal conductivity. Zn doping is found to increase the density of states effective mass, leading to an enhanced Seebeck coefficient while maintaining a high mobility. The intensified phonon scattering of point defects and stacking faults in Ge_1-<em>x</em>Zn_<em>x</em>Te samples leads to significantly reduced lattice thermal conductivity, with a minimum value of only ∼0.51 Wm⁻¹K⁻¹ at 775 K. The Ge_0.98Zn_0.02Te sample achieves a maximum <em>zT</em>∼1.4 at 775 K. The further introduced Sc not only enhances the phonon scattering from multi-scale microstructures to reduce the lattice thermal conductivity, resulting in the lowest value of ∼0.29 Wm⁻¹K⁻¹, but also improves the Vickers hardness, which is about 43 % higher than the Zn doped samples. This work demonstrates the Zn and Sc co-doped GeTe samples as excellent thermoelectric materials for practical applications.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107904"},"PeriodicalIF":3.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anchoring of liquid crystal molecules on multi-walled carbon nanotubes and their effects on enhanced photoluminescence dynamics, fluorescence decay and distinctive electrical properties","authors":"Nidhi Manhas ,&nbsp;Lalita S. Kumar ,&nbsp;Pankaj Kumar ,&nbsp;Vandna Sharma ,&nbsp;Rajeev S. Joshi ,&nbsp;Rangappa Keri ,&nbsp;A.K. Swetha ,&nbsp;Vinayak Adimule","doi":"10.1016/j.solidstatesciences.2025.107905","DOIUrl":"10.1016/j.solidstatesciences.2025.107905","url":null,"abstract":"<div><div>In the present work, self-organized non-polar liquid crystalline (LC) molecules (3b, 3c) were anchored by multi-walled carbon nanotubes (MWCNTs) to enhance optical and electrical properties. The 3b, 3c@MWCNTs LC-intercalated systems (IS) exhibited co-axial distribution of MWCNTs with orderly arrangement showing well-aligned interference colors with banded patterns in the textures, as observed using a polarizing optical microscope. Steady state photoluminescence studies unveiled sharp emission peaks around blue, yellow and red bands, and a broad emission peaks around violet band for 3b, 3c@MWCNTs LC-IS. Further, the Stoke's shifts were observed larger indicating that LC-IS can be used for display applications with high contrast ratio. Fluorescence decay studies demonstrated that average lifetime (τ) was in the range of 0.200ns–0.089ns and 0.087–0.139ns for 3b@MWCNTs and 3c@MWCNTs LC-IS, respectively and were lower than pure 3b, 3c LCs. Due to which it influenced the faster recombination of the excited photons, enabling effective charge transfer rates, and aid in the attainment of quantum equilibrium states quickly in the LC matrix. Furthermore, capacitance-voltage measurements of 3b@MWCNTs LC-IS showed quasi-static complete alignment at 42 °C and 3.2V, however, stable at 10V with relative dielectric permittivity of 0.023. The polarization studies confirmed asymmetric nature of 3b@MWCNTs LC-IS, showing saturation value of 41.8 μC/cm² with remnant polarization of 21.4 μC/cm². PFUND studies evidenced that polarization of 3b@MWCNTs LC-IS followed the rate of pulse and the delay at 40 °C and 42 °C with 2V of bias voltage. In contrast, 3c@MWCNTs LC-IS mild reorientation was seen at 2.4V and 7V with breakdown at 10V and polarization didn't follow rate of pulse and delay at any applied voltages. From the reported research work a new pathway has been opened for further exploration of electro-optical properties of various LC molecules, and can serve as a reference to improve electrical and optical properties of LC-IS systems for advanced display applications.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107905"},"PeriodicalIF":3.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase formation under hydrothermal conditions and thermodynamics properties in the GdPO4-YPO4 system","authors":"M.O. Enikeeva ,&nbsp;O.V. Proskurina ,&nbsp;S.I. Lopatin ,&nbsp;V.V. Gusarov","doi":"10.1016/j.solidstatesciences.2025.107899","DOIUrl":"10.1016/j.solidstatesciences.2025.107899","url":null,"abstract":"<div><div>Phase formation in the GdPO₄-YPO₄ system has been studied. The samples were synthesized under hydrothermal conditions at a temperature of 503 K and a pressure of approximately 10 MPa for 28 days of isothermal holding. The results of thermal treatment of the obtained samples at 1473 and 1673 K and the results of thermal treatment of GdPO₄ at 1873 K are presented. It is shown that in the system, solid solutions Gd_1-<em>x</em>Y_<em>x</em>PO₄ are formed based on phases with monoclinic structure GdPO₄ and xenotime structure YPO₄. The range of existence of two solid solutions at temperatures 503–1473 K lies in the range of compositions from <em>x</em>≈0.20 to <em>x</em>≈0.40. At a temperature of 1673 K, the formation of a phase with anhydrite structure is observed at <em>x</em>≈0.26, and the beginning of transformation of GdPO₄ from monoclinic to xenotime structure. Using Knudsen effusion mass spectrometry (KEMS), the qualitative and quantitative composition of the vapor over the (1-<em>x</em>)GdPO₄-<em>x</em>YPO₄ system has been determined, which consists of a mixture of PO, PO₂, and O₂. The enthalpy value of the vaporization reaction and the standard formation enthalpies for the GdPO₄ and YPO₄, as well as the activity of P₄O₁₀ in the condensed phase of the (1-<em>x</em>)GdPO₄-<em>x</em>YPO₄ system, were determined in the temperature range 1650–1850 K.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107899"},"PeriodicalIF":3.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scintillation properties of Eu3+ doped Lu3Al5O12 single crystals","authors":"Toshiaki Kunikata ,&nbsp;Kenichi Watanabe ,&nbsp;Hiromi Kimura ,&nbsp;Kai Okazaki ,&nbsp;Takumi Kato ,&nbsp;Daisuke Nakauchi ,&nbsp;Noriaki Kawaguchi ,&nbsp;Takayuki Yanagida","doi":"10.1016/j.solidstatesciences.2025.107902","DOIUrl":"10.1016/j.solidstatesciences.2025.107902","url":null,"abstract":"<div><div>Lutetium aluminum garnet single crystals doped with different concentrations of Eu (0.5, 1.0, 5.0, 10.0, 15.0 %) were grown using the floating zone method, and their optical and scintillation properties were investigated. Several sharp peaks due to 4f-4f transitions of Eu³⁺ ions were observed at 580–710 nm in photoluminescence (PL) and scintillation spectra, and the PL and scintillation decay times were estimated to be 2.9–3.8 ms. We measured the pulse height spectra under γ-ray irradiation from ¹³⁷Cs (662 keV) using the setup for scintillators with slow decay times, and the light yields of the samples were estimated. The 5.0 % Eu-doped lutetium aluminum garnet sample showed the highest light yield of 30,000 photons/MeV among the samples.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107902"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of (HfTiZrTaM)B2 (M=Mn/Mo/W/Cr) high entropy diboride ceramics with five/six components prepared via powder metallurgy","authors":"İlayda Süzer ,&nbsp;Esin Aysel ,&nbsp;Kübra Gürcan Bayrak ,&nbsp;Sıddıka Mertdinç-Ülküseven ,&nbsp;Duygu Ağaoğulları","doi":"10.1016/j.solidstatesciences.2025.107898","DOIUrl":"10.1016/j.solidstatesciences.2025.107898","url":null,"abstract":"<div><div>This study shows the possibility of synthesizing five/six constituent high entropy (HfTiZrTaM)B₂ (M=Mn/Mo/W/Cr) diboride ceramics via mechanical alloying (MA) assisted spark plasma sintering (SPS). Firstly, metal borides as starting materials were synthesized in-house via mechanochemical synthesis (MCS) and leaching using optimum conditions. Secondly, metal borides were mixed in equimolar ratios to consist of five or six components, and then MA was used to hybridize the mixture for 6 h. SPS (2000 °C, 30 MPa) was used to convert the hybridized powders into densified structures. The compositional, microstructural, physical, mechanical and thermal analyses were conducted. Based on the results, the main HEB phase and low amount of (Hf, Zr) oxides were detected. Also, there was a secondary phase in the (HfTiZrTaCrW)B₂ composition. Approximately 8.19 g/cm³ and 6.72 g/cm³ were found as the highest and the lowest Archimedes’ densities for the (HfTiZrTaCrW)B₂ and (HfTiZrTaCrMo)B₂ samples, respectively. (HfTiZrTaCrMn)B₂ had the lowest hardness value nearly 22 GPa, and (HfTiZrTaCrW)B₂ had the highest hardness value at about 24 GPa. (HfTiZrTaCrW)B₂ had the highest wear rate (∼6.85x10⁻⁶ mm³/Nm), and (HfTiZrTaCrMo)B₂ had the lowest wear rate (∼5.95x10⁻⁷ mm³/Nm). Based on the thermal tests, the highest weight gain up to 1100 °C was found for the (HfTiZrTaCrMn)B₂ sample</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107898"},"PeriodicalIF":3.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of high capacity porous nickel borides via novel molten salt electrolysis","authors":"Mehtap Arslan-Kaba,&nbsp;Servet Timur,&nbsp;Guldem Kartal Sireli","doi":"10.1016/j.solidstatesciences.2025.107889","DOIUrl":"10.1016/j.solidstatesciences.2025.107889","url":null,"abstract":"<div><div>This work focused on producing Ni-boride powders via the novel boron diffusion method called CRTD-Bor (cathodic reduction and thermal diffusion-based boriding) and their electrochemical examinations. The nickel specimens with mesh geometry were borided through the whole cross-section at 1000 °C and 200 mA/cm² for 2 h and held inside of the molten electrolyte for 1 h of phase homogenization. After the boriding treatment, the fully boron diffused specimens were ground via a ball mill and cold-pressed. The structural characterizations of the Ni-boride powders were carried out by using X-ray diffractometry (XRD), scanning electron microscopy (SEM). The results demonstrated that the powders were composed of NiB, Ni₄B₃, Ni₂B, and Ni₃B, where Ni₄B₃ was dominant. To examine the electrochemical behaviors of produced electrodes, cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) techniques were performed through the standard three-electrode system. The CV experiment was conducted within the potential range of 0–0.45 V, over 2000 cycles at 200 mV/s. While a 76 % increase in areal capacitance (Ca) was detected until the 1000th cycle, this value remained constant afterward. Ca was calculated as 1500 mF/cm² at 10 mV/s. At different scan rate experiments, the b value was found as 0.65, representing the system was under mixed control, namely both capacitive and faradaic. The charge/discharge behavior was investigated via GCD at different current densities (0.1–0.01 A/cm²). According to data obtained from GCD, the energy and power density values were calculated as 57.5 mWh/cm² and 3450 mW/cm² at 0.01 A/cm², respectively.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"163 ","pages":"Article 107889"},"PeriodicalIF":3.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}