Pub Date : 2024-10-22DOI: 10.1016/j.materresbull.2024.113162
Shuaibo Zeng , Zheng Lin , Jing Peng , Zixing He , Xinghua Liang , Yongyi Li , Yang Lv , Liangbin Xiong
The silicon-based anode has attracted wide attention because of its high theoretical specific capacity, which is expected to greatly improve the batteries’ energy density. However, during the charge-discharge cycles, the great volume expansion of the anode active silicon seriously restricts its electrochemical stability. Herein, N-doping carbon-coated silicon microsphere was prepared for lithium-ion batteries. Benefit from the core-shell structure formed from silicon carbon, the volume change of silicon anode during the cycle is well coordinated. What's more, N-doping carbon reduces the reaction energy barrier between silicon and lithium and accelerates the electrochemical reaction, which improves the cycling performance of the battery. The specific capacity of the prepared button battery is as high as 2913.13 mAh g−1 at the current density of 0.21 mA g−1, and the average coulomb efficiency is higher than 99.84 % during the cycling. And the capacity of NC@SiO2 anode gradually stabilizes after 500 cycles.
硅基负极因其理论比容量高，有望大大提高电池的能量密度而受到广泛关注。然而，在充放电循环过程中，阳极活性硅的巨大体积膨胀严重制约了其电化学稳定性。本文制备了用于锂离子电池的 N 掺杂碳包覆硅微球。得益于硅碳形成的核壳结构，硅负极在循环过程中的体积变化得到了很好的协调。此外，掺杂 N 的碳降低了硅与锂之间的反应能垒，加速了电化学反应，从而提高了电池的循环性能。在 0.21 mA g-1 的电流密度下，制备的纽扣电池的比容量高达 2913.13 mAh g-1，循环过程中的平均库仑效率高于 99.84%。NC@SiO2 阳极的容量在循环 500 次后逐渐趋于稳定。
{"title":"Synergistic structural integrity and remarkable structural stability of NC@Si anodes for lithium-ion batteries","authors":"Shuaibo Zeng , Zheng Lin , Jing Peng , Zixing He , Xinghua Liang , Yongyi Li , Yang Lv , Liangbin Xiong","doi":"10.1016/j.materresbull.2024.113162","DOIUrl":"10.1016/j.materresbull.2024.113162","url":null,"abstract":"<div><div>The silicon-based anode has attracted wide attention because of its high theoretical specific capacity, which is expected to greatly improve the batteries’ energy density. However, during the charge-discharge cycles, the great volume expansion of the anode active silicon seriously restricts its electrochemical stability. Herein, N-doping carbon-coated silicon microsphere was prepared for lithium-ion batteries. Benefit from the core-shell structure formed from silicon carbon, the volume change of silicon anode during the cycle is well coordinated. What's more, N-doping carbon reduces the reaction energy barrier between silicon and lithium and accelerates the electrochemical reaction, which improves the cycling performance of the battery. The specific capacity of the prepared button battery is as high as 2913.13 mAh <em>g</em><sup>−1</sup> at the current density of 0.21 mA <em>g</em><sup>−1</sup>, and the average coulomb efficiency is higher than 99.84 % during the cycling. And the capacity of NC@SiO<sub>2</sub> anode gradually stabilizes after 500 cycles.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113162"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561477","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}
Pub Date : 2024-10-22DOI: 10.1016/j.materresbull.2024.113161
Shaoxi Zhang , Xiangnan Chen , Leilei Jiang , Haina Wang , Xin Tian , Ruohao Li , Jingyi Fan , Guangjun Gou
Electromagnetic absorption materials present widespread application prospects. The thermal oxidative aging issues for electromagnetic absorption materials have received little attention. In this paper, N-doped carbon tubes, and the SiCN ceramics are combined to realize thermostable electromagnetic absorptions. The hierarchical structures show significantly enhanced broadband electromagnetic absorption with an optimal RL of -53.61 dB at 14 GHz under a thickness of 2 mm. The effective electromagnetic absorption bandwidth reaches 5.53 GHz, and the coverage range is 11.88–17.41 GHz. More importantly, after 1 h calcination at 300 °C, the optimum RL of NCT/SiCN-1 h is still -45.67 dB under the thickness of 2.5 mm. The effective electromagnetic absorption bandwidth increases to 5.95 GHz, and the coverage range is 10.69–16.64 GHz. Our work proves the possibility for improving the thermostable electromagnetic absorptions of carbon materials, and provides referencing ways for the design of thermostable electromagnetic absorption materials.
电磁吸收材料具有广泛的应用前景。但电磁吸收材料的热氧化老化问题却鲜有人关注。本文将掺杂 N 的碳管和 SiCN 陶瓷结合起来，实现了热稳定性电磁吸收。在厚度为 2 mm 的情况下，分层结构的宽带电磁吸收能力明显增强，在 14 GHz 频率下的最佳 RL 为 -53.61 dB。有效电磁吸收带宽达到 5.53 GHz，覆盖范围为 11.88-17.41 GHz。更重要的是，在 300 °C 煅烧 1 h 后，厚度为 2.5 mm 的 NCT/SiCN-1 h 的最佳 RL 仍为 -45.67 dB。有效电磁吸收带宽增至 5.95 GHz，覆盖范围为 10.69-16.64 GHz。我们的工作证明了提高碳材料恒温电磁吸收性能的可能性，并为恒温电磁吸收材料的设计提供了参考方法。
{"title":"Hollow N doped carbon/SiCN hierarchical structures for thermostable electromagnetic absorptions","authors":"Shaoxi Zhang , Xiangnan Chen , Leilei Jiang , Haina Wang , Xin Tian , Ruohao Li , Jingyi Fan , Guangjun Gou","doi":"10.1016/j.materresbull.2024.113161","DOIUrl":"10.1016/j.materresbull.2024.113161","url":null,"abstract":"<div><div>Electromagnetic absorption materials present widespread application prospects. The thermal oxidative aging issues for electromagnetic absorption materials have received little attention. In this paper, N-doped carbon tubes, and the SiCN ceramics are combined to realize thermostable electromagnetic absorptions. The hierarchical structures show significantly enhanced broadband electromagnetic absorption with an optimal <em>RL</em> of -53.61 dB at 14 GHz under a thickness of 2 mm. The effective electromagnetic absorption bandwidth reaches 5.53 GHz, and the coverage range is 11.88–17.41 GHz. More importantly, after 1 h calcination at 300 °C, the optimum <em>RL</em> of NCT/SiCN-1 h is still -45.67 dB under the thickness of 2.5 mm. The effective electromagnetic absorption bandwidth increases to 5.95 GHz, and the coverage range is 10.69–16.64 GHz. Our work proves the possibility for improving the thermostable electromagnetic absorptions of carbon materials, and provides referencing ways for the design of thermostable electromagnetic absorption materials.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113161"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532276","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}
Pub Date : 2024-10-22DOI: 10.1016/j.materresbull.2024.113157
Qian Zhai , Dong Guo , Enyi Zhou , Chunling Lu , Dongchao Qiu , Gaobin Liu , Bingbing Niu , Biao Wang
Symmetrical solid oxide cells (SSOCs), which use the same material for both anode and cathode, simplify the cell fabrication process and effectively resist carbon deposition and sulfur poisoning. In this study, Zr, Y co-doped SrFe0.8Zr0.1Y0.1O3-δ (SFZY) perovskite oxide is synthesized and evaluated its properties as an SSOFCs electrode. Density functional theory (DFT) indicates that the local state density of SFZY is lower than that of SrFeO3-δ (SFO). SFZY has good chemical compatibility with La0.8Sr0.2Ga0.83Mg0.17O3−δ (LSGM) electrolyte below cell operating temperature. Zr, Y co-doped SrFe0.8Zr0.1Y0.1O3-δ maintains structural stability in H2 atmosphere. At 750 ℃, the polarization resistance (Rp) of SFZY is 0.11 and 1.06 Ω cm2 in air and hydrogen atmosphere, respectively. During the Rp stability test, SFZY exhibits better stability than that of SrFeO3-δ in air and hydrogen atmosphere. At 750 ℃, the maximum power density of SFZY/LSGM/SFZY fuel cell reaches 420.1 and 258.31 mWcm−2 using H2 and wet C3H8 as fuel, respectively. In electrolytic mode, the current density of SFZY/LSGM/SFZY electrolysis cell reaches -0.55 A cm−2 at 1.3 V for electrolysis of pure CO2 at 750 ℃. In summary, SFZY has a great potential as SSOCs electrode.
{"title":"Zr and Y co-doped SrFe0.8Zr0.1Y0.1O3-δ perovskite oxide as a stable, high-performance symmetrical electrode for solid oxide cells","authors":"Qian Zhai , Dong Guo , Enyi Zhou , Chunling Lu , Dongchao Qiu , Gaobin Liu , Bingbing Niu , Biao Wang","doi":"10.1016/j.materresbull.2024.113157","DOIUrl":"10.1016/j.materresbull.2024.113157","url":null,"abstract":"<div><div><strong>Symmetrical solid oxide cells (SSOCs), which use the same material for both anode and cathode, simplify the cell fabrication process and effectively resist carbon deposition and sulfur poisoning</strong>. In this study, Zr, Y co-doped SrFe<sub>0.8</sub>Zr<sub>0.1</sub>Y<sub>0.1</sub>O<sub>3-δ</sub> (SFZY) perovskite oxide is <strong>synthesized</strong> and evaluated its properties as an SSOFCs electrode. Density functional theory (DFT) indicates that the <strong>local state density</strong> of SFZY is lower than that of SrFeO<sub>3-δ</sub> (SFO). SFZY has good chemical compatibility with La<sub>0.8</sub>Sr<sub>0.2</sub>Ga<sub>0.83</sub>Mg<sub>0.17</sub>O<sub>3−δ</sub> (LSGM) electrolyte below cell operating temperature. Zr, Y co-doped SrFe<sub>0.8</sub>Zr<sub>0.1</sub>Y<sub>0.1</sub>O<sub>3-δ</sub> maintains structural stability in H<sub>2</sub> atmosphere. At 750 ℃, the polarization resistance (Rp) of SFZY is 0.11 and 1.06 Ω cm<sup>2</sup> in air and hydrogen atmosphere, respectively. <strong>During the Rp stability test,</strong> SFZY exhibits better stability than that of SrFeO<sub>3-δ</sub> in air and hydrogen atmosphere. At 750 ℃, the maximum power density of SFZY/LSGM/SFZY fuel cell reaches 420.1 and 258.31 mWcm<sup>−2</sup> using H<sub>2</sub> and wet C<sub>3</sub>H<sub>8</sub> as fuel, respectively. In electrolytic mode, the current density of SFZY/LSGM/SFZY electrolysis cell reaches -0.55 A cm<sup>−2</sup> at 1.3 V for electrolysis of <strong>pure</strong> CO<sub>2</sub> at 750 ℃. In summary, SFZY has a great potential as SSOCs electrode.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113157"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553499","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}
Zn-MnO2 batteries are safe, low cost, and have a high energy density comparable to Li-ion batteries. This study focuses on finding a new MnO2-based cathode composition for rechargeable mildly acidic Zn-MnO2 battery. For this purpose, a combinatorial approach was used, and thick film cathodes were deposited on nickel substrates using sputter targets MnO2, Na0.7MnO2, NiO and Bi2O3. A total of 36 cathodes were produced over a wide compositional range. The study has shown two regions of high rechargeable capacity, one centered on Bi0.02Na0.63Ni0.02Mn0.33Ox and the other on Bi0.04Na0.37Ni0.06Mn0.53Ox to be developed as cathodes using conventional slurry method.
{"title":"Doped NaMnOx cathodes for Zn-MnO2 batteries for improved capacity and rechargeability","authors":"Yiğit Akbaş , Necdet Özgür Darıcıoğlu , Tayfur Öztürk","doi":"10.1016/j.materresbull.2024.113159","DOIUrl":"10.1016/j.materresbull.2024.113159","url":null,"abstract":"<div><div>Zn-MnO<sub>2</sub> batteries are safe, low cost, and have a high energy density comparable to Li-ion batteries. This study focuses on finding a new MnO<sub>2</sub>-based cathode composition for rechargeable mildly acidic Zn-MnO<sub>2</sub> battery. For this purpose, a combinatorial approach was used, and thick film cathodes were deposited on nickel substrates using sputter targets MnO<sub>2</sub>, Na<sub>0.7</sub>MnO<sub>2</sub>, NiO and Bi<sub>2</sub>O<sub>3</sub>. A total of 36 cathodes were produced over a wide compositional range. The study has shown two regions of high rechargeable capacity, one centered on Bi<sub>0.02</sub>Na<sub>0.63</sub>Ni<sub>0.02</sub>Mn<sub>0.33</sub>O<sub>x</sub> and the other on Bi<sub>0.04</sub>Na<sub>0.37</sub>Ni<sub>0.06</sub>Mn<sub>0.53</sub>O<sub>x</sub> to be developed as cathodes using conventional slurry method.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113159"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572582","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}
Pub Date : 2024-10-22DOI: 10.1016/j.materresbull.2024.113158
Qi Wang , Luwen Fan , Jingru Sun , Zhenglin Tan , Jiajia Mu , Xiaoming Zhou , Lizhi Sheng
Herein, we investigated the effects of tree species selection on the specific surface area and electrochemical properties of wood-derived carbon electrodes. The SEM, Raman spectra and aperture distribution test results showed that compared with BCW and ZCW, CW had a more complex hierarchical porous structure and more defects. The N2 adsorption/desorption isotherms and electrochemical test results showed that CW had the largest specific surface area and the best electrochemical performance, with a specific surface area of 495.3 m2g−1 and an areal capacitance of 3079 mF cm−2 at 5 mA cm−2. The specific surface area and electrochemical properties of ACW, ABCW and AZCW electrodes obtained by CO2 activation were significantly improved compared with CW, BCW and ZCW electrodes. Among the activated electrodes, the ACW electrode had the highest specific surface area (558.4 m2g−1) and the highest areal capacitance (3727 mF cm−2 at 5 mA cm−2).
{"title":"Effects of tree species pore structure characteristics and CO2 activation on the performance of their derived carbon electrode for supercapacitors","authors":"Qi Wang , Luwen Fan , Jingru Sun , Zhenglin Tan , Jiajia Mu , Xiaoming Zhou , Lizhi Sheng","doi":"10.1016/j.materresbull.2024.113158","DOIUrl":"10.1016/j.materresbull.2024.113158","url":null,"abstract":"<div><div>Herein, we investigated the effects of tree species selection on the specific surface area and electrochemical properties of wood-derived carbon electrodes. The SEM, Raman spectra and aperture distribution test results showed that compared with BCW and ZCW, CW had a more complex hierarchical porous structure and more defects. The N<sub>2</sub> adsorption/desorption isotherms and electrochemical test results showed that CW had the largest specific surface area and the best electrochemical performance, with a specific surface area of 495.3 m<sup>2</sup> <em>g</em><sup>−1</sup> and an areal capacitance of 3079 mF cm<sup>−2</sup> at 5 mA cm<sup>−2</sup>. The specific surface area and electrochemical properties of ACW, ABCW and AZCW electrodes obtained by CO<sub>2</sub> activation were significantly improved compared with CW, BCW and ZCW electrodes. Among the activated electrodes, the ACW electrode had the highest specific surface area (558.4 m<sup>2</sup> <em>g</em><sup>−1</sup>) and the highest areal capacitance (3727 mF cm<sup>−2</sup> at 5 mA cm<sup>−2</sup>).</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113158"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553498","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}
This study presents the synthesis of N-(4-(N-carbamimidoylsulfamoyl)phenyl)benzo[d]thiazole-2-carbohydrazonoyl cyanide (NCSBC), a novel passivator material for perovskite solar cells (PSCs). The structure was confirmed by FTIR, ¹H NMR, and ¹³C NMR, while Hall-effect measurements revealed a hole mobility of 1.15 × 10³ cm²/Vs. UV–Vis analysis showed absorption peaks at 295 and 422 nm, corresponding to transitions related to azo groups and aromatic rings in NCSBC. The compound exhibited an optical energy gap of 2.47 eV, consistent with DFT-based molecular modeling. Thermal stability and electrochemical properties further validated its suitability for photovoltaic applications. Incorporating NCSBC into PSCs with an FTO/c-TiO2/MAPbI3/NCSBC/spiroMeOTAD/Ag device configuration resulted in a power conversion efficiency (PCE) of 16.21 %, compared to 14.47 % for the control. This work highlights NCSBC's potential for cost-effective, high-efficiency defect passivation in PSCs.
{"title":"Passivator materials based on the benzothiazole-sulfonamide hybrid: Synthesis, optical, electrochemical properties, and molecular modeling for perovskite solar cells","authors":"Ahmed M․ M․ Fadl , Ahmed Mourtada Elseman , Abu-Bakr A․ A․ M․ El-Adasy , M․ M․ Rashad , M․ S․ A․ El-Gaby","doi":"10.1016/j.materresbull.2024.113151","DOIUrl":"10.1016/j.materresbull.2024.113151","url":null,"abstract":"<div><div>This study presents the synthesis of <em>N</em>-(4-(<em>N</em>-carbamimidoylsulfamoyl)phenyl)benzo[d]thiazole-2-carbohydrazonoyl cyanide (<em>N<img></em>CSBC), a novel passivator material for perovskite solar cells (PSCs). The structure was confirmed by FTIR, ¹H NMR, and ¹³C NMR, while Hall-effect measurements revealed a hole mobility of 1.15 × 10³ cm²/Vs. UV–Vis analysis showed absorption peaks at 295 and 422 nm, corresponding to transitions related to azo groups and aromatic rings in <em>N<img></em>CSBC. The compound exhibited an optical energy gap of 2.47 eV, consistent with DFT-based molecular modeling. Thermal stability and electrochemical properties further validated its suitability for photovoltaic applications. Incorporating <em>N<img></em>CSBC into PSCs with an FTO/c-TiO<sub>2</sub>/MAPbI<sub>3</sub>/<em>N</em><img>CSBC/spiroMeOTAD/Ag device configuration resulted in a power conversion efficiency (PCE) of 16.21 %, compared to 14.47 % for the control. This work highlights <em>N<img></em>CSBC's potential for cost-effective, high-efficiency defect passivation in PSCs.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113151"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553502","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}
The noble metal Pt modified ZnO nanomaterials are widely used to improve their gas sensing performance. However, the relationship between the catalytic effect of Ptx+ species on the oxygen vacancies formation and gas-sensing performance is still unclear. Herein, the Pt/ZnO nanorods are successfully synthesized by using hydrothermal method, and the content of Pt0 species are finely tuned through treating in different atmospheres. Notably, Pt modified ZnO calcined under Ar/H2 (Pt/ZnO-3) exhibits excellent sensing response (Ra/Rg = 2196, 81 times higher than pure ZnO) to 50 ppm triethylamine at 140 °C, with fast response/recovery behavior, low limit of detection, and superior selectivity. Detailed structural characterization indicates that Pt nanoparticle modification reduces the band gap of the samples. In addition, the high content of Pt0 species promotes the generation of adsorbed oxygen, which significantly enhances the gas-sensitive performance of the sensor. This work demonstrates that the concentration of Pt0 species greatly affects gas-sensing performance.
{"title":"The catalytic effect of Pt0 species on Pt/ZnO nanorods for robust triethylamine sensing detection","authors":"Li-Juan Yue , Su-Mei Shen , Wen-Jie Zhang , Fei-Long Gong, Xuan-Yu Yang, Yong-Hui Zhang","doi":"10.1016/j.materresbull.2024.113156","DOIUrl":"10.1016/j.materresbull.2024.113156","url":null,"abstract":"<div><div>The noble metal Pt modified ZnO nanomaterials are widely used to improve their gas sensing performance. However, the relationship between the catalytic effect of Pt<sup>x+</sup> species on the oxygen vacancies formation and gas-sensing performance is still unclear. Herein, the Pt/ZnO nanorods are successfully synthesized by using hydrothermal method, and the content of Pt<sup>0</sup> species are finely tuned through treating in different atmospheres. Notably, Pt modified ZnO calcined under Ar/H<sub>2</sub> (Pt/ZnO-3) exhibits excellent sensing response (R<sub>a</sub>/R<sub>g</sub> = 2196, 81 times higher than pure ZnO) to 50 ppm triethylamine at 140 °C, with fast response/recovery behavior, low limit of detection, and superior selectivity. Detailed structural characterization indicates that Pt nanoparticle modification reduces the band gap of the samples. In addition, the high content of Pt<sup>0</sup> species promotes the generation of adsorbed oxygen, which significantly enhances the gas-sensitive performance of the sensor. This work demonstrates that the concentration of Pt<sup>0</sup> species greatly affects gas-sensing performance.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113156"},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561512","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}
Pub Date : 2024-10-21DOI: 10.1016/j.materresbull.2024.113155
Muhammad Zahir Iqbal , Hamid Ali , Rashid Ali , Abhinav Kumar , Md Rezaul Karim , Mohammad Abul Farah
Bimetallic transition metal nitrides have gained significant attention as battery-grade electrode materials for the application of energy storage. This study investigates the electrochemical performance of co-sputtered tungsten (W) with titanium nitride (TiN) and chromium nitride (CrN), where the electrode fabrication is carried out using an RF/DC magnetron sputtering unit. The structural properties, surface morphology, and elemental content of the sample are analyzed with X-ray diffraction, SEM, and EDX, respectively. The battery-grade nature of the electrode materials is revealed by the electrochemical performance in half-cell configuration. In half-cell assembly specific capacity (Qs) of 1408 C/ g is achieved with W-TiN and 583.8 C/ g with W-CrN electrode, respectively. The device (W-TiN//AC) delivers a specific capacity of 347.2 C/g, with energy and power densities of 88 Wh/kg and 1700 W/kg. Linear and quadratic models are employed to deconvolute the capacitive and diffusive impact on the total capacity of the device.
{"title":"Evaluating the synergistic effect of co-sputtered W-TiN and W-CrN electrodes for superior capacitance in hybrid supercapacitors","authors":"Muhammad Zahir Iqbal , Hamid Ali , Rashid Ali , Abhinav Kumar , Md Rezaul Karim , Mohammad Abul Farah","doi":"10.1016/j.materresbull.2024.113155","DOIUrl":"10.1016/j.materresbull.2024.113155","url":null,"abstract":"<div><div>Bimetallic transition metal nitrides have gained significant attention as battery-grade electrode materials for the application of energy storage. This study investigates the electrochemical performance of co-sputtered tungsten (W) with titanium nitride (TiN) and chromium nitride (CrN), where the electrode fabrication is carried out using an RF/DC magnetron sputtering unit. The structural properties, surface morphology, and elemental content of the sample are analyzed with X-ray diffraction, SEM, and EDX, respectively. The battery-grade nature of the electrode materials is revealed by the electrochemical performance in half-cell configuration. In half-cell assembly specific capacity (Q<sub>s</sub>) of 1408 C/ g is achieved with W-TiN and 583.8 C/ g with W-CrN electrode, respectively. The device (W-TiN//AC) delivers a specific capacity of 347.2 C/g, with energy and power densities of 88 Wh/kg and 1700 W/kg. Linear and quadratic models are employed to deconvolute the capacitive and diffusive impact on the total capacity of the device.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113155"},"PeriodicalIF":5.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561478","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}
Pub Date : 2024-10-19DOI: 10.1016/j.materresbull.2024.113154
Kiran, Y. Dwivedi
The current investigation reports on laser spectroscopy and temperature-sensitive optical response of composite consisting of phosphors (ZnGa2O4:Cr3+ and SrAl2O4:Eu2+, Dy3+) coated on a tellurite glass layer. Based on this composite, a temperature sensor, sensitve in the range of 298 K to 423 K, demonstrates a remarkable temperature sensitivity. Various analytical techniques, such as X-ray Diffraction, Scanning Electron Microscopy, High-Resolution Transmission Electron Microscopy, laser spectroscopy, etc., were employed to analyze the prepared composite. The investigation reveals the presence of ZGO and SrAl phosphors with crystalline sizes of approximately 36 nm and 25 nm, respectively, while the particle size ranges from 400 nm to 600 nm. A dip coating method was utilized to deposit tellurite-phosphor layers on the glass substrate to create a temperature sensor. SEM analysis indicates a layer thickness of around 93 µm. The existence of Eu2+ and Cr3+ ions was confirmed through photoexcitation and emission spectra on a 405 nm laser excitation. The temperature-dependent luminescence was studied using a ratiometric technique, showing a linear variation with temperature, resulting in an excellent temperature sensitivity of about 1.41 % K−1 at 298 K. Our preliminary study of the phosphor-tellurite composite suggests significant potential for extensive use in the field of dual-mode highly sensitive optical thermometry.
{"title":"Temperature responsive behaviour of SrAl2O4(Eu, Dy):ZnGa2O4(Cr) phosphor-glass composite","authors":"Kiran, Y. Dwivedi","doi":"10.1016/j.materresbull.2024.113154","DOIUrl":"10.1016/j.materresbull.2024.113154","url":null,"abstract":"<div><div>The current investigation reports on laser spectroscopy and temperature-sensitive optical response of composite consisting of phosphors (ZnGa<sub>2</sub>O<sub>4</sub>:Cr<sup>3+</sup> and SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>, Dy<sup>3+</sup>) coated on a tellurite glass layer. Based on this composite, a temperature sensor, sensitve in the range of 298 K to 423 K, demonstrates a remarkable temperature sensitivity. Various analytical techniques, such as X-ray Diffraction, Scanning Electron Microscopy, High-Resolution Transmission Electron Microscopy, laser spectroscopy, etc., were employed to analyze the prepared composite. The investigation reveals the presence of ZGO and SrAl phosphors with crystalline sizes of approximately 36 nm and 25 nm, respectively, while the particle size ranges from 400 nm to 600 nm. A dip coating method was utilized to deposit tellurite-phosphor layers on the glass substrate to create a temperature sensor. SEM analysis indicates a layer thickness of around 93 µm. The existence of Eu<sup>2+</sup> and Cr<sup>3+</sup> ions was confirmed through photoexcitation and emission spectra on a 405 nm laser excitation. The temperature-dependent luminescence was studied using a ratiometric technique, showing a linear variation with temperature, resulting in an excellent temperature sensitivity of about 1.41 % <em>K</em><sup>−1</sup> at 298 K. Our preliminary study of the phosphor-tellurite composite suggests significant potential for extensive use in the field of dual-mode highly sensitive optical thermometry.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113154"},"PeriodicalIF":5.3,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553497","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}
Pub Date : 2024-10-18DOI: 10.1016/j.materresbull.2024.113141
Anton Markovskyi , Piotr Radomski , Wioletta Dewo , Vitalii Gorbenko , Alexander Fedorov , Tomasz Runka , Yuriy Zorenko
Raman spectroscopy, high spectral resolution luminescence, and X-ray diffraction techniques were employed to study two Ce3+ doped Y3Al5O12 single crystalline films grown by liquid phase epitaxy method onto Y3Al5O12 and Lu3Al5O12 single crystal substrates. Optical spectra were obtained with a micrometer step along the cross-sections of epitaxial structures, allowing excellent differentiation of the film, the transition layer, and the substrate of each sample. X-ray measurements demonstrate the mismatch between the lattice constants of the Y3Al5O12:Ce3+ film and its Lu3Al5O12 substrate, an effect related to different compositions. Consequently, the film grown onto Lu3Al5O12 exhibits higher residual stresses than its counterpart grown onto Y3Al5O12. This was confirmed by a mutual comparison of the Raman bands positions of the films. The luminescence spectra of both samples consist mainly of cerium 5d-4f emission, the intensity of which allows for additional study of epitaxial cross section and estimation of the size of transition layer.
{"title":"Photoluminescence and Raman spectroscopy of Ce3+ doped Y3Al5O12 single crystalline films grown onto Y3Al5O12 and Lu3Al5O12 substrates","authors":"Anton Markovskyi , Piotr Radomski , Wioletta Dewo , Vitalii Gorbenko , Alexander Fedorov , Tomasz Runka , Yuriy Zorenko","doi":"10.1016/j.materresbull.2024.113141","DOIUrl":"10.1016/j.materresbull.2024.113141","url":null,"abstract":"<div><div>Raman spectroscopy, high spectral resolution luminescence, and X-ray diffraction techniques were employed to study two Ce<sup>3+</sup> doped Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> single crystalline films grown by liquid phase epitaxy method onto Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> and Lu<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> single crystal substrates. Optical spectra were obtained with a micrometer step along the cross-sections of epitaxial structures, allowing excellent differentiation of the film, the transition layer, and the substrate of each sample. X-ray measurements demonstrate the mismatch between the lattice constants of the Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> film and its Lu<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> substrate, an effect related to different compositions. Consequently, the film grown onto Lu<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> exhibits higher residual stresses than its counterpart grown onto Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>. This was confirmed by a mutual comparison of the Raman bands positions of the films. The luminescence spectra of both samples consist mainly of cerium 5d-4f emission, the intensity of which allows for additional study of epitaxial cross section and estimation of the size of transition layer.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113141"},"PeriodicalIF":5.3,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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