Ceramics International最新文献

{"title":"The phase composition, dielectric, and energy storage performance of A-site vacancy modulated BaTiO3 ceramics with Bi(In1/2(Li0.5Ta0.5)1/2)O3 modification","authors":"Dan Xu ,&nbsp;Xinyuan Zhou ,&nbsp;Taolin Yu ,&nbsp;Jiale Wei ,&nbsp;Fujia Ben ,&nbsp;Wenjie Zhao","doi":"10.1016/j.ceramint.2024.09.392","DOIUrl":"10.1016/j.ceramint.2024.09.392","url":null,"abstract":"<div><div>The (1-x)Ba_0.94Ce_0.04TiO₃-xBi(In_1/2(Li_0.5Ta_0.5)_1/2)O₃ (BCT-BILT) relaxor ferroelectric ceramic system was explored based on the A-site vacancy design and defect dipole engineering. The impacts of different doping concentrations on the phase composition, dielectric and energy storage performance of the BCT-BILT ceramics were studied and discussed in detail. The pure BCT and 0.95BCT-0.05BILT samples exhibited a mixed crystal structure of tetragonal (T) and pseudo-cubic (PC) phase, while the BCT-BILT samples with x &gt; 0.05 possessed a cubic (C) phase, accompanied by the secondary phases of BaBi₂Ta₂O₉ and BaTa₂O₆. With an increase in the BILT doping concentration, the surface morphologies of the ceramics were continuously modulated, and the dielectric loss had been reduced to 0.001 at 1 kHz, which was beneficial to improve the energy storage properties. Compared to the pure BCT, the breakdown field strength was significantly enhanced owing to the formation of Aurivillius phase BaBi₂Ta₂O₉ and the increased dielectric relaxation. Ultimately, the highest energy storage density of <em>W</em>_rec = 0.7 J/cm³ and high energy conversion efficiency of <em>η</em> = 95 % was realized at the composition of x = 0.05 under a small electric field of 130 kV/cm. Furthermore, the good temperature stability with the Δ<em>W</em>_rec/<em>W</em>_rec30°C &lt; 9 % and Δ<em>η</em>/<em>η</em>_30°C &lt; 6.5 % was acquired for the samples with x = 0.20–0.30 in the temperature range of 30–120 °C, owing to the synergistic roles of the defect dipoles, impurities BaBi₂Ta₂O₉, and polar nanoregions (PNRs). The 0.95BCT-0.05BILT ceramic obtains discharge energy density <em>W</em>_dis of 0.35 J/cm³ and fast discharge speed <em>t</em>_0.9 of 312 ns at 60 kV/cm, current density <em>C</em>_D of 255.4 A/cm² and power density <em>P</em>_D of 10.2 MW/cm³ at 80 kV/cm. This work is of guiding significance for designing and optimizing energy storage performance of lead-free relaxors from the perspective of defect building and engineering.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50469-50483"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700324","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":"Mechanical properties and multi-field ferroelastic response of Nb/Mn Co-doped CaBi4Ti4O15 high-temperature ferroelectric ceramics","authors":"Jiageng Xu ,&nbsp;Shaoxiong Xie ,&nbsp;Yongjie Liu ,&nbsp;Xiandong zhou ,&nbsp;Qingyuan Wang ,&nbsp;Jianguo Zhu","doi":"10.1016/j.ceramint.2024.09.406","DOIUrl":"10.1016/j.ceramint.2024.09.406","url":null,"abstract":"<div><div>CaBi₄Ti₄O₁₅ (CBT) ceramics are promising piezoelectric materials that have been widely studied for high-temperature applications. Despite significant advancements in the electrical performance of CBT ceramics, the understanding of their mechanical behaviors remains limited, which is unfavorable for designing ceramics with high stability and reliability during high-temperature service. This work investigated the mechanical properties and fracture behaviors of Nb/Mn co-doped CaBi₄Ti₄O₁₅ (CBTNM) with various doping levels, focusing on stress-strain responses and ferroelastic deformation behaviors under uniaxial compression and multi-field coupling conditions. HRTEM analysis reveals small-scale layered domain wall structures on the surface of plate-like grains. The fracture and compressive strengths of CBTNM ceramics initially decrease and then increase with an increase in doping content, and the underlying mechanisms are related to grain size, defects, and densification. CBTNM ceramics exhibit nonlinear stress-strain responses due to ferroelastic deformation under compressive loading, and the resultant irreversible domain switching strain increases with an increase in doping content, while poling can further increase the residual strain. Under multi-field loading conditions, CBTNM ceramics undergo more ferroelastic deformation events and exhibit larger residual strain. The micro-cracks, pores, complicated fracture modes, and degraded fracture surfaces with fragmental and rough features are mainly responsible for the lower elastic modulus and inferior mechanical response. This work enhances our understanding of the mechanical behaviors of high-temperature piezoelectric ceramics and provides guidance for designing high-performance piezoelectric materials for complex environmental applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50607-50621"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700437","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":"Biocompatibility and antimicrobial efficacy of silver-doped borosilicate bioactive glass for tissue engineering application","authors":"Oluwatosin David Abodunrin ,&nbsp;Abdelhabib Semlali ,&nbsp;Khalil EL Mabrouk ,&nbsp;Meriame Bricha","doi":"10.1016/j.ceramint.2024.09.399","DOIUrl":"10.1016/j.ceramint.2024.09.399","url":null,"abstract":"<div><div>Borate bioactive glasses are an auspicious material for tissue engineering applications due to their enhanced dissolution rate, bioactivity, and capacity to integrate therapeutic ions. In this study, borate-based S49B4 bioactive glass doped with silver at mass fraction of 0.5, 1, and 3 wt% were studied for bioactivity, degradation, antibacterial, and cytocompatibility. Thermogravimetric analysis revealed that the bioactive glasses were thermally stable between 600 and 700 °C. Fourier transform infrared spectroscopy and X-ray diffraction confirmed the successful synthesis of an amorphous phase of the doped borosilicate bioactive glasses and the incorporation of silver ion crystals within the structure, as well as associated contributions from borate and silicate network formers in the borosilicate bioactive glass. Morphological evaluation revealed that the borosilicate bioactive glasses exhibit a uniform and spherical shape across all formulations, with the mean particle size varying from 65 to 76 nm. An <em>in-vitro</em> acellular bioactivity in simulated body fluid medium showed that increasing the silver content increased the degradation rate and pH. Besides, scanning electron microscopy and Energy dispersive X-ray spectroscopy analysis revealed an upsurge in apatite production on the BBGs' surfaces as well as incremental Calcium-Phosphate ratio values of 1.50, 1.65 and 1.70 as the silver content increases. The antibacterial effect was tested against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em>, while cytocompatibility was tested against human gingival epithelial cells. Silver integration at 1 wt percent yielded the most promising outcomes, which were particularly bactericidal at 79.8 % for <em>Escherichia coli</em> and 93.41 % for <em>Staphylococcus aureus</em>. Similarly, its Lactate Dehydrogenase percentage is significantly similar to the negative control employed in the study, indicating its biocompatibility. In contrast, 3 wt% silver exhibited the maximum bactericidal activity while also exhibiting mild cytotoxicity. In summary, our research indicates that elevated silver concentration enhances the bioactivity and antimicrobial characteristics of borosilicate bioactive glasses; nevertheless, a higher silver weight percent in this study also increases the possibility of cytotoxicity. It is therefore essential to carefully regulate the amount of silver doping at lower concentrations in order to maximize antibacterial action and minimize toxicity to human cells. The results presented here contribute to our understanding of the prospective use of silver doped borosilicate bioactive glasses as a possible material for tissue engineering applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50535-50547"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700522","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":"Superior energy storage properties of BiFeO3 doped NaNbO3 antiferroelectric ceramics","authors":"Bingsen Wang ,&nbsp;Junjun Wang ,&nbsp;Yuxiao Du ,&nbsp;Jian Dai ,&nbsp;Zhenhao Fan ,&nbsp;Wenfeng Yue ,&nbsp;Fu Huang ,&nbsp;Atilla Evcin ,&nbsp;Yasemin Tabak ,&nbsp;Limei Zheng ,&nbsp;Dawei Wang","doi":"10.1016/j.ceramint.2024.09.403","DOIUrl":"10.1016/j.ceramint.2024.09.403","url":null,"abstract":"<div><div>NaNbO₃ (NN)-based dielectric ceramics for energy storage have garnered significant interest due to their high saturation polarization, low residual polarization, and superior breakdown strength (<em>E</em>_b). However, the low recoverable energy storage density (<em>W</em>_rec) and efficiency (<em>η</em>) significantly limited their practical application. Herein, BiFeO₃ (BF) was incorporated into NN to optimize the energy storage performance. The NN-BF ceramics exhibited pronounced antiferroelectric (AFE) relaxor phase, alongside grain size reduction and <em>E</em>_b enhancement, which contributed to a significant increase of <em>W</em>_rec and <em>η</em>. Specially, the optimum <em>W</em>_rec of 4.43 J/cm³ and <em>η</em> of 71.51 % were achieved at the composition of 0.9NN-0.1BF. Besides, stable energy storage performance was maintained over a wide temperature range (20–120 °C). These results highlight the potential of NN-BF relaxor AFE ceramics as promising candidates for high-performance energy storage applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50587-50594"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700436","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":"γ-radiation-induced centers in irradiated perovskite SrCeO3 and their role in thermally stimulated reactions: Fluorescence, thermally stimulated luminescence, electron paramagnetic resonance and shielding studies","authors":"Vijay Singh ,&nbsp;S. Watanabe ,&nbsp;T.K. Gundu Rao ,&nbsp;V.P. Singh ,&nbsp;Nilo F. Cano","doi":"10.1016/j.ceramint.2024.09.409","DOIUrl":"10.1016/j.ceramint.2024.09.409","url":null,"abstract":"<div><div>One promising host for actinide radioactive wastes is orthorhombic perovskite-type oxide. Perovskite SrCeO₃ ceramic was synthesized by nitrate-fuel combustion, which includes the organic fuel glycine. Powder X-ray diffraction was utilized to determine the structural features, and γ-radiation-induced changes and shielding properties were investigated in perovskite SrCeO₃. In a mixed-phase sample, a bright sky-blue luminescence was observed, and two thermoluminescence (TL) peaks were seen in irradiated SrCeO₃ ceramic. Electron paramagnetic resonance (EPR) spectrum in γ-irradiated SrCeO₃ ceramic had contributions from five defect centers. Center I having an isotropic <em>g</em>-value equal to 2.0283, is ascribed to an O⁻ ion, while center II with an axial <em>g</em>-tensor with principal values <em>g</em>_|| = 2.0224 and <em>g</em>_⊥ = 2.0068 is determined as an O₂⁻ ion. O⁻ ion relates to the TL peak at 215 °C. Center III with a <em>g</em>-value equal to 2.0009 is identified as an F⁺ center and is related to the 185 °C TL peak. The defect center associated with center IV is also identified as an F⁺ center. An additional defect center in the higher field region of the spectrum is assigned to an F⁺ center, and the center results from an F-center (oxygen vacancy with two electrons). The mass attenuation coefficients, effective atomic numbers, and half-value layer thicknesses concerning shielding property effectiveness were computed and it was found that the perovskite SrCeO₃ ceramic provided superior γ-shielding properties.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50648-50656"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700439","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":"Densification mechanism and corrosion properties of h-BN/MgAl2O4 ceramics prepared by hot-pressed sintering","authors":"Yongshun Qi ,&nbsp;Fan Zhang ,&nbsp;Bingbing Fan ,&nbsp;Xiaolu Li ,&nbsp;Mao Chen ,&nbsp;Rui Zhang ,&nbsp;Hongxia Li ,&nbsp;Yongqiang Chen","doi":"10.1016/j.ceramint.2024.09.424","DOIUrl":"10.1016/j.ceramint.2024.09.424","url":null,"abstract":"<div><div>The dense <em>h</em>-BN/MgAl₂O₄ composites without additives were fabricated by hot-pressed sintering. The effect of sintering temperature and MgAl₂O₄ on the bulk density, mechanical properties and corrosion resistance were systematically investigated. The results showed that the collaboration of sintering temperature and MgAl₂O₄ dominated the densification behavior due to the enhanced pore filling effects and solid diffusion. The improved densification and induced microstructure development contributed to enhanced mechanical properties. Additionally, the residual MgAl₂O₄ is more conducive to forming plate-like complex oxide with molten steel after BN oxidation and B₂O₃ volatilization. Consequently, the plate-like complex oxide can effectively hinder direct contact between molten steel and the composite, which determines the corrosion resistance of the <em>h</em>-BN/MgAl₂O₄ composite. This study highlights the enormous potential of <em>h</em>-BN/MgAl₂O₄ composites for future use as side-sealing materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50793-50800"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700313","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":"Effect of temperature and oxidative atmosphere on the oxidation behavior of yttrium-containing ceramics","authors":"Fang He ,&nbsp;Yongsheng Liu ,&nbsp;Mengmeng Zheng ,&nbsp;Zihua Liu ,&nbsp;Yuan Pan","doi":"10.1016/j.ceramint.2024.09.415","DOIUrl":"10.1016/j.ceramint.2024.09.415","url":null,"abstract":"<div><div>Yttrium-containing ceramics exhibit excellent resistance to water-oxygen corrosion, making them an attractive choice as the modified matrix for SiC_f/SiC composites. However, the oxidation products of yttrium-containing ceramics are complex and vary widely in performance. In this study, YSOC ceramics, which are composed of yttrium silicate, SiO₂, and SiC, were prepared using Y₂O₃, SiO₂, SiC, and Li₂CO₃. This research investigated the effects of high temperatures, air oxidation, and water-oxygen corrosion on the phase compositions of YSOC ceramics. The influence of environmental factors on the synthesis and decomposition of yttrium silicate was analyzed. Moreover, the study explored the compatibility of different oxidation products with SiC. The results suggest that Y₂SiO₅ and Y₂Si₂O₇ are formed through the low eutectic of SiO₂, Y₂O₃, and Li₂CO₃. The high SiO₂ content likely contributes to the relatively low formation temperature of Y₂Si₂O₇. In the oxidizing environment, Y₂SiO₅ reacts with SiO₂ to produce Y₂Si₂O₇. Conversely, in the water vapor-containing atmosphere, Y₂Si₂O₇ undergoes hydrolysis to form Y₂SiO₅. Y₂Si₂O₇ displays a reduced elastic modulus in comparison to SiC fibers and exhibits favorable physical and chemical compatibility with SiC fibers. However, the hydrolysis of Y₂Si₂O₇ may potentially affect the water-oxygen corrosion resistance of the ceramics. These findings will significantly advance research and enhance understanding of the water-oxygen corrosion behaviors of yttrium-containing matrix-modified composites.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50704-50712"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700434","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":"Effects of mechanical alloying methods on structural phase stability, chemical state, optical, electrical and ferroelectric properties in Sc-doped α-Fe2O3 system","authors":"Bipin Kumar Parida ,&nbsp;R.N. Bhowmik ,&nbsp;Amit Kumar","doi":"10.1016/j.ceramint.2024.09.317","DOIUrl":"10.1016/j.ceramint.2024.09.317","url":null,"abstract":"<div><div>The development of metal doped α-Fe₂O₃ (hematite) based wide band gap semiconductors with high electrical conductivity, high electrical polarization and wide optical band gap is a challenging problem and also useful for application point of view. In this work, a substantial enhancement of electrical conductivity, optical band gap and ferroelectric polarization have been recorded at room temperature for Sc doped α-Fe₂O₃ system. Two different methods of the mechanical alloying and subsequent heat treatment have been used to synthesize the samples of α-Fe_2-xSc_xO₃ oxide (x = 0.2–1.0). The X-ray diffraction patterns have confirmed formation of single-phased Rhombohedral structure for low Sc doping content (x = 0.2), whereas a mixture of Rhombohedral-structured α-Fe₂O₃ type phase and cubic-structured Sc₂O₃ type phase has been formed for the higher Sc contents (x = 0.5 and 1.0). The phase fractions varied depending on the amount of Sc content, chemical reaction during mechanical alloying of the elementary oxides and solid-state reaction during the heat treatment. Response of the Sc₂O₃ type phase in Raman spectra is sensitive depending on the methods of inter-mixing the α-Fe₂O₃ and Sc₂O₃ by mechanical alloying. X-ray photoelectron spectroscopy (XPS) confirmed the metal (Fe, Sc) ions in +3 charge state, although the samples for low Sc content x = 0.2 showed a signature of Fe⁺² and Sc⁺⁴ states. A detailed analysis of the Fe 3s XPS band confirmed a strong 3s-3d spins exchange coupling of strengths 1.18 eV–1.34 eV.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49732-49747"},"PeriodicalIF":5.1,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664365","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 Writing of SiC-polymer nanocomposites for humidity sensing with enhanced performance","authors":"Anasheh Khecho,&nbsp;Erina B. Joyee","doi":"10.1016/j.ceramint.2024.09.388","DOIUrl":"10.1016/j.ceramint.2024.09.388","url":null,"abstract":"<div><div>Humidity sensors are essential for monitoring humidity levels in various fields. This paper investigates the development and optimization of humidity sensitive SiC-Fe₃O₄ polymer nanocomposites with varying Fe₃O₄ concentrations fabricated using Direct Writing (DW) process. The inks were evaluated for flow behavior to ensure proper extrudability through the nozzle. The rheological behavior was then correlated with the printing parameters to optimize the printing accuracy of the nanocomposites. It was observed that all the inks exhibited shear-thinning behavior, enabling a smooth extrusion process. To ensure high-resolution features, a new image analysis method was introduced to quantify corner rounding in printed features, enabling the optimization of printing parameters. In terms of humidity sensing performance, all the inks displayed a change in electrical properties with humidity adsorption. The fabricated nanocomposites showed a decrease in electrical conductivity with increasing humidity, suggesting potential for humidity-sensing applications. Notably, the humidity sensitivity of the nanocomposites was highly dependent on the Fe₃O₄ concentration in the inks. These findings provide valuable insights into the DW of SiC-Fe₃O₄ polymer nanocomposites for humidity sensing applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50427-50435"},"PeriodicalIF":5.1,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700438","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":"Effect of Ce-doping on the structural, morphological, and electrochemical features of Co3O4 nanoparticles synthesized by solution combustion method for battery-type supercapacitors","authors":"Rosaiah Pitcheri ,&nbsp;Siva Prasad Mooni ,&nbsp;Dhanalakshmi Radhalayam ,&nbsp;Maaouni Nora ,&nbsp;Soumyendu Roy ,&nbsp;Fatimah Ali M. Al-Zahrani ,&nbsp;Maduru Suneetha","doi":"10.1016/j.ceramint.2024.09.396","DOIUrl":"10.1016/j.ceramint.2024.09.396","url":null,"abstract":"<div><div>This study investigates the potential of cerium (Ce) doping to improve the performance of cobalt oxide (Co₃O₄) nanoparticles as battery-type supercapacitor electrodes. Pure Co₃O₄ nanoparticles were synthesized via a solution combustion method and then doped with 2.5 % (Ce-Co₃O₄) and 5 % Ce (CeO₂-Co₃O₄). Comprehensive characterization, including X-ray diffraction (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FESEM), was used to analyze the impact of Ce doping on the material properties. XRD analysis confirmed the successful incorporation of Ce into the Co₃O₄ structure, with distinct CeO₂ phases forming at higher doping levels. Ce doping resulted in decreased crystallite size and peak intensity, indicating reduced crystallinity and increased defect concentration. Raman spectroscopy corroborated these findings, showing a redshift that suggests weakened metal-oxygen bonds and smaller grain sizes due to Ce³⁺ incorporation. FESEM images demonstrated that Ce doping effectively reduced nanoparticle agglomeration, with 2.5 % doping leading to smaller particles and 5 % doping promoting a 2D flake-like morphology with increased porosity. Nitrogen adsorption-desorption measurements revealed a significant increase in surface area and pore volume for CeO₂-Co₃O₄, facilitating improved electrolyte diffusion and reduced resistance, thereby enhancing electrochemical performance. Evaluation of the electrochemical properties of undoped and Ce-doped Co₃O₄ materials revealed a battery-like response in a three-electrode configuration. Notably, the CeO₂-Co₃O₄ exhibited a superior specific capacity of 603.3 C g⁻¹ at a current density of 1 A g⁻¹, significantly exceeding the values of 368.5 C g⁻¹ and 127.1 C g⁻¹ achieved by Ce-Co₃O₄ and undoped Co₃O₄, respectively. Furthermore, the CeO₂-doped Co₃O₄ demonstrated exceptional cyclic stability, retaining 87 % of its initial capacity after undergoing 5000 charge-discharge cycles at a high current density of 10 A g⁻¹. These results suggest that Ce doping is a promising strategy for optimizing Co₃O₄-based battery-type electrode materials, potentially leading to the development of high-performance and cost-effective energy storage systems.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50504-50515"},"PeriodicalIF":5.1,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700327","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}