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Ionic conductivity in the novel complex oxide Ba0.95La1.05InO4.025 with Ruddlesden-Popper structure Ruddlesden-Popper结构Ba0.95La1.05InO4.025复合氧化物的离子电导率
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-15 DOI: 10.1007/s11581-025-06383-1
E. Abakumova, T. Kuznetsova, V. Zaviralova, V. Gnatyuk, D. Pyankov, N. Tarasova
{"title":"Ionic conductivity in the novel complex oxide Ba0.95La1.05InO4.025 with Ruddlesden-Popper structure","authors":"E. Abakumova,&nbsp;T. Kuznetsova,&nbsp;V. Zaviralova,&nbsp;V. Gnatyuk,&nbsp;D. Pyankov,&nbsp;N. Tarasova","doi":"10.1007/s11581-025-06383-1","DOIUrl":"10.1007/s11581-025-06383-1","url":null,"abstract":"<p>High oxygen-ion and proton conductivity is an important property for energy materials, especially for those to be used in solid oxide fuel cells and electrolyzes. The Ruddlesden-Popper complex oxides are a prospective class of oxygen-ion conducting electrolytes. Well-known oxygen-ion conductors with the classic perovskite ABO<sub>3</sub> structure have already been successfully doped using the donor-doping method. However, results on the application of this donor-doping method to Ruddlesden-Popper complex oxides are not so extensive. In this paper, novel complex oxide Ba<sub>0.95</sub>La<sub>1.05</sub>InO<sub>4.025</sub> with a Ruddlesden-Popper structure has been synthesized and investigated for the first time. The oxygen-ion conductivity values for the new donor doped (La<sup>3+</sup> → Ba<sup>2+</sup>) complex oxide Ba<sub>0.95</sub>La<sub>1.05</sub>InO<sub>4.025</sub> are about 0.5 orders of magnitude higher than those for the undoped BaLaInO<sub>4</sub> composition. The oxygen-ion transport numbers of the new composition Ba<sub>0.95</sub>La<sub>1.05</sub>InO<sub>4.025</sub> reach approximately 90% at 300°C.</p>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"7125 - 7134"},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unveiling the potential of 2D oxocarbon anodes for lithium-ion batteries: a computational exploration of 2D-C(_6)O(_6) and Kagome-C(_6)O(_6) 揭示锂离子电池2D氧碳阳极的潜力:2D- c (_6) O (_6)和Kagome-C (_6) O的计算探索(_6)
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-15 DOI: 10.1007/s11581-025-06366-2
Nasim Hassani
{"title":"Unveiling the potential of 2D oxocarbon anodes for lithium-ion batteries: a computational exploration of 2D-C(_6)O(_6) and Kagome-C(_6)O(_6)","authors":"Nasim Hassani","doi":"10.1007/s11581-025-06366-2","DOIUrl":"10.1007/s11581-025-06366-2","url":null,"abstract":"<div><p>Graphene and reduced graphene oxide (rGO) are commonly used as anode materials in lithium-ion batteries, but their performance is limited by irregular oxygen groups and poor crystalline order. To address this, we employed an evolutionary algorithm to predict two novel 2D oxocarbon structures: 2D-C<span>(_6)</span>O<span>(_6)</span> and 2D Kagome-C<span>(_6)</span>O<span>(_6)</span>. Using density functional theory (DFT), we investigated their structural and electronic properties for potential Li-ion battery applications. Phonon and ab initio molecular dynamics (AIMD) simulations confirm the dynamic and thermal stability of both materials at 300K. However, at 1000K, 2D Kagome-C<span>(_6)</span>O<span>(_6)</span> undergoes structural degradation, while 2D-C<span>(_6)</span>O<span>(_6)</span> remains stable. Upon lithium adsorption, 2D-C<span>(_6)</span>O<span>(_6)</span> exhibits metallic behavior, high electrical conductivity, and a significant capacity of 1128 mAhg<span>(^{-1})</span> with an energy density of 1974 mWhg<span>(^{-1})</span>, outperforming many other 2D materials. In contrast, 2D Kagome-C<span>(_6)</span>O<span>(_6)</span> degrades under lithium adsorption, limiting its application. If experimentally validated, 2D-C<span>(_6)</span>O<span>(_6)</span> could enhance the performance of Li-ion batteries.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"6769 - 6785"},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vanadium dissolution inhibition strategy for vanadium oxide materials in aqueous zinc-ion batteries 含水锌离子电池中氧化钒材料的钒溶出抑制策略
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-15 DOI: 10.1007/s11581-025-06372-4
Chengyi Hu, Junyang Dan, Zideng Zhou, Meixin Li, Jiayu Jiang, Haolun Ma, Jingyu Xiong, Bingbing Hu, Hao Luo
{"title":"Vanadium dissolution inhibition strategy for vanadium oxide materials in aqueous zinc-ion batteries","authors":"Chengyi Hu,&nbsp;Junyang Dan,&nbsp;Zideng Zhou,&nbsp;Meixin Li,&nbsp;Jiayu Jiang,&nbsp;Haolun Ma,&nbsp;Jingyu Xiong,&nbsp;Bingbing Hu,&nbsp;Hao Luo","doi":"10.1007/s11581-025-06372-4","DOIUrl":"10.1007/s11581-025-06372-4","url":null,"abstract":"<div><p>Vanadium oxides facilitate the reversible intercalation and deintercalation of zinc ions, which is essential for achieving high-performance energy storage devices. Consequently, they are considered promising cathode materials for aqueous zinc-ion batteries (AZIBs). However, a significant challenge associated with vanadium-based materials in AZIBs is the dissolution of vanadium species. This phenomenon occurs during battery operation when vanadium dissolves into the electrolyte, resulting in the loss of active material and a gradual decline in battery performance over time. As aqueous zinc-ion batteries gain increasing prominence, the issue of vanadium dissolution has attracted considerable attention. To ensure the stable application of vanadium oxide materials in AZIBs, it is imperative to develop effective suppression strategies. In this context, this paper first introduces the crystal structures of several common vanadium oxides and provides an in-depth analysis of the dissolution mechanism of vanadium in AZIBs. Subsequently, this paper proposes various suppression strategies from three perspectives: electrolyte optimization, cathode material modification, and separator enhancement. Additionally, the potential of cathode materials and separators as mainstream suppression strategies is also discussed.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"6653 - 6677"},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Environmentally friendly synthesis of crystalline NiS2 and NiS2/S with high utilization efficiency of precursor sulfur atoms enabled by polysulfide chemistry for electrochemical ion storage applications 利用多硫化物化学技术,环境友好地合成NiS2晶体和NiS2/S晶体,并提高前驱体硫原子的利用率,用于电化学离子存储
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-14 DOI: 10.1007/s11581-025-06364-4
Jingjing Han, Xiaocheng Ju, Yi Xiao, Xinyu Liang, Guoli Zhang, Xiaoxia Jia, Zhewei Yang, Yuede Pan
{"title":"Environmentally friendly synthesis of crystalline NiS2 and NiS2/S with high utilization efficiency of precursor sulfur atoms enabled by polysulfide chemistry for electrochemical ion storage applications","authors":"Jingjing Han,&nbsp;Xiaocheng Ju,&nbsp;Yi Xiao,&nbsp;Xinyu Liang,&nbsp;Guoli Zhang,&nbsp;Xiaoxia Jia,&nbsp;Zhewei Yang,&nbsp;Yuede Pan","doi":"10.1007/s11581-025-06364-4","DOIUrl":"10.1007/s11581-025-06364-4","url":null,"abstract":"<div><p>Nickel disulfide (NiS<sub>2</sub>) is a promising electrochemical storage material for varied charge carrier ions. However, previous preparation approaches for NiS<sub>2</sub>-based materials have been haunted by the low utilization efficiency of the sulfur atoms in the precursor and the detrimental byproduct of SO<sub>2</sub>. Inspired by the unique crystal structure of NiS<sub>2</sub>, composed of Ni<sup>2+</sup> cations and S<sub>2</sub><sup>2−</sup> anions, herein, we develop an environmentally friendly synthesis method for crystalline NiS<sub>2</sub> with 100% utilization efficiency of precursor sulfur atoms through the precipitation reaction between Ni<sup>2+</sup> and S<sub>2</sub><sup>2−</sup>, which can happen at varied temperatures and in different solvents. Furthermore, a NiS<sub>2</sub>/S composite is in situ formed by the co-precipitation reaction between Ni<sup>2+</sup> and S<sub>8</sub><sup>2−</sup>, which can also occur at varied temperatures and in different solvents. As demonstration, both the NiS<sub>2</sub> and NiS<sub>2</sub>/S have been applied for the electrochemical storage of nonaqueous Na<sup>+</sup> ions and aqueous Cu<sup>2+</sup> ions. Owing to the in situ formed elemental sulfur with higher theoretical capacity and the considerable conductivity provided by the framework of NiS<sub>2</sub> in the NiS<sub>2</sub>/S composite, it exhibits superior electrochemical performance compared to NiS<sub>2</sub> in terms of capacity, rate, and cycling stability. The polysulfide anions produced in the process of nonaqueous sodium ion storage enhance the electrochemical kinetics, and the sulfur can be converted into Cu<sub>2</sub>S through the intermediate of CuS in the process of aqueous copper ion storage. The sodium ion storage capacity of NiS<sub>2</sub>/S is retained at 578.5 mAh g<sup>−1</sup> after 375 cycles at 2.0 A g<sup>−1</sup>, and its reversible copper ion storage can sustain a long life of 1500 cycles at 1.0 A g<sup>−1</sup>. Our work paves the way towards liquid-state inorganic synthesis of metal sulfides composed of metal cations and disulfide anions.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"6807 - 6817"},"PeriodicalIF":2.6,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative analysis of machine learning techniques for lithium-ion battery capacity prediction 锂离子电池容量预测的机器学习技术对比分析
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-13 DOI: 10.1007/s11581-025-06359-1
Bhimireddy Lakshminarayana, Satyavir Singh, Tasadeek Hassan Dar
{"title":"Comparative analysis of machine learning techniques for lithium-ion battery capacity prediction","authors":"Bhimireddy Lakshminarayana,&nbsp;Satyavir Singh,&nbsp;Tasadeek Hassan Dar","doi":"10.1007/s11581-025-06359-1","DOIUrl":"10.1007/s11581-025-06359-1","url":null,"abstract":"<div><p>Predicting battery capacity is essential for enhancing battery management systems (BMSs), ensuring safety, and extending battery life. However, lithium-ion battery faces the challenge of performance degradation over the period due to electrochemical phenomena. It can be addressed with data-driven techniques to estimate the battery capacity and remaining useful life (RUL). The machine learning (ML) algorithm efficacy directly impacted by the data types. NASA and CALCE datasets are used to validate the applicability of ML algorithms. The dataset are divided into training and testing sets based on charged-discharged cycles. Pretraining datasets are tested in time series with forward prediction judgment of the data size to predict RUL. There may be an overfitting or underfitting problems in estimating capacity of the battery. However, such problems can be addressed with proper tuning of hyperparameters in time series model with, number of trees, maximum depth of the tree and splitting the data points. As data may be noisy or nonlinear, in most cases, RF prevents overfitting or underfitting by building multiple decision trees which reduces the variance and increases accuracy. RF achieves comparable prediction accuracy, even when trained on limited data as compared to existing data-driven techniques in terms of error metrics RMSE, MSE, MAPE, and <i>R</i><sup>2</sup>. The findings highlight RF as a preferred choice with an average RMSE error reduced to 5.66E-16 and predict the battery RUL maximum error in four cycles to lithium-ion battery. These techniques may provide robustness to BMS in real-time applications.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"6851 - 6863"},"PeriodicalIF":2.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","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 fabrication of polyaniline-strontium hexaferrite composites for efficient electrodes in symmetric supercapacitor 对称超级电容器高效电极用聚苯胺-六铁氧体锶复合材料的原位制备
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-13 DOI: 10.1007/s11581-025-06377-z
Monalisa Pradhan, Suvamay Pramanik, Alipsa Das, Abhrajit Nandi, Manoj Kangsabanik, Mainak Swarnakar, Sukanta De, Manish Pal Chowdhury, Rabindra Nath Gayen
{"title":"In-situ fabrication of polyaniline-strontium hexaferrite composites for efficient electrodes in symmetric supercapacitor","authors":"Monalisa Pradhan,&nbsp;Suvamay Pramanik,&nbsp;Alipsa Das,&nbsp;Abhrajit Nandi,&nbsp;Manoj Kangsabanik,&nbsp;Mainak Swarnakar,&nbsp;Sukanta De,&nbsp;Manish Pal Chowdhury,&nbsp;Rabindra Nath Gayen","doi":"10.1007/s11581-025-06377-z","DOIUrl":"10.1007/s11581-025-06377-z","url":null,"abstract":"<div><p>In this study, we report the development of a novel nanocomposite comprised of hexagonal disc-shaped strontium hexaferrite (SHF) and polyaniline (PANI) for supercapacitor application. SHF powders are synthesized via a hydrothermal method, and PANI/SHF composites with varying ratios are prepared through in situ polymerization. Microstructural studies confirm the formation of M-type SHF (SrFe₁₂O₁₉) phase with hexagonal disc morphology. The electrochemical performance of PANI/SHF composites with varying compositions is demonstrated in a symmetric two-electrode cell configuration. The specific capacitance of the electrode is enhanced significantly for PANI/SHF composites compared to pristine SHF and PANI. The optimum value of specific capacitance ~ 505 F/g is observed for the electrode with composite having 1:1 SHF-to-PANI ratio at a scan rate of 2 mV/s. The device also demonstrates an energy density of 17.56 Wh/kg and a power density of 126.45 W/kg, along with excellent cycling stability, retaining 83.6% capacitance after 8,000 cycles. The effect of PANI content on enhancing SHF's supercapacitor properties through efficient charge carrier dynamics is systematically investigated. The improved performance is attributed to the synergistic effect of PANI's high conductivity and SHF’s electrochemical stability, highlighting their promise for next-generation supercapacitor electrodes.\u0000</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"7283 - 7297"},"PeriodicalIF":2.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nanoflower-like K-birnessite cathode material for high-capacity aqueous Zn-ion battery 高容量含水锌离子电池正极材料纳米花状钾铋酸盐
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-13 DOI: 10.1007/s11581-025-06348-4
Yuxuan Xiao, Changxin Han, Ting Yin, Wenjing Zhou, Juan Chou, Yuhong Zheng, Fengyue Zhang, Juanjuan Cheng, Yun Ou, Longfei Liu
{"title":"Nanoflower-like K-birnessite cathode material for high-capacity aqueous Zn-ion battery","authors":"Yuxuan Xiao,&nbsp;Changxin Han,&nbsp;Ting Yin,&nbsp;Wenjing Zhou,&nbsp;Juan Chou,&nbsp;Yuhong Zheng,&nbsp;Fengyue Zhang,&nbsp;Juanjuan Cheng,&nbsp;Yun Ou,&nbsp;Longfei Liu","doi":"10.1007/s11581-025-06348-4","DOIUrl":"10.1007/s11581-025-06348-4","url":null,"abstract":"<div><p>Aqueous zinc ion batteries (AZIBs) have become a research hotspot due to their advantages of low cost, high safety, and environmental friendliness. K-Birnessite (K<sub>x</sub>MnO<sub>2</sub>) has been proved to be a candidate cathode material. However, the low conductivity and capacity degradation issues of δ-MnO<sub>2</sub> limit its application. In the study, K<sub>x</sub>MnO<sub>2</sub> (<i>x</i> = 0.27 and 0.31) with a nanoflower structure to improve the specific capacity has been designed, and capacity deterioration related to the evolution of Zn<sub>4</sub>SO<sub>4</sub>(OH)<sub>6</sub>·<i>x</i>H<sub>2</sub>O was analyzed. The capacity of K0.27MnO2 and K0.31MnO2 were 401.8 and 412.4 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup> in the initial cycle due to the large specific surface area provided by the nanoflower structure. After 100 cycles, the specific capacity of the K<sub>0.27</sub>MnO<sub>2</sub> electrode was 156.8 mAh g<sup>−1</sup> at 1.0 A g<sup>−1</sup>, with a capacity retention rate close to 80%. During cycling, Zn<sub>4</sub>SO<sub>4</sub>(OH)<sub>6</sub>·<i>x</i>H<sub>2</sub>O was formed on the surface of the K<sub>x</sub>MnO<sub>2</sub> cathode and transformed from a thin slice to a cracked block, leading to slow ion transport. This work provides a perspective for high-performance cathode design in AZIBs.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"7069 - 7078"},"PeriodicalIF":2.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fabrication and its electrochemical investigation of coin cell supercapacitors in redox additive electrolyte 氧化还原添加剂电解质中硬币电池超级电容器的制备及其电化学研究
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-13 DOI: 10.1007/s11581-025-06374-2
G. Hariharan, M. Babu, S. Bharathi, K. Satheesh, A. Arivarasan
{"title":"Fabrication and its electrochemical investigation of coin cell supercapacitors in redox additive electrolyte","authors":"G. Hariharan,&nbsp;M. Babu,&nbsp;S. Bharathi,&nbsp;K. Satheesh,&nbsp;A. Arivarasan","doi":"10.1007/s11581-025-06374-2","DOIUrl":"10.1007/s11581-025-06374-2","url":null,"abstract":"<div><p>The development of coin cell supercapacitors with enhanced performance played a pivotal role in modern energy storage devices. In this study, high-performance coin cell supercapacitors were fabricated using conventional copper oxide (CuO-CO) and multiwalled carbon nanotube-mediated CuO (CuO@MWCNT-CM) nanocomposites (NCs)-based electrodes and aqueous KOH electrolyte with potassium ferrocyanide as redox additive electrolyte (RAE). The synergistic effects between the metal oxide and MWCNT in terms of conductivity, redox stability, and performances significantly boosted the electrode performance. Further, the additional redox active sites produced by the optimized concentration of RAE enhanced the supercapacitor’s performances. As the evident of synergistic effect between CuO and MWCNT, and redox additives utilization, the developed supercapacitors with CM NCs delivered the highest C<sub>sp</sub> and specific capacities of 240.54 F g<sup>−1</sup> and 93.54 mAh g<sup>−1</sup>, respectively, with the superior energy density, power density, and cyclic stability values of 40.09 Wh kg<sup>−1</sup>, 1125 W kg<sup>−1</sup>, and 70.1% (after 10,000 GCD cycles), respectively, in RAE. The asymmetrical coin cell supercapacitors (CR2032) were fabricated using CO NPs and CM NCs with KOH and RAE electrolytes. The charging and discharging capacities of the fabricated coin cell supercapacitors were tested, and it revealed that CM NCs-based coin cell supercapacitors with RAE explored extended charge and discharge capabilities than other coin cell combinations.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"7257 - 7272"},"PeriodicalIF":2.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CoAl-LDH incorporated g-C3N4 nanosheets: a dual-function photocatalyst for hydrogen production and dye degradation 煤- ldh加入了g-C3N4纳米片:一种用于制氢和降解染料的双功能光催化剂
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-10 DOI: 10.1007/s11581-025-06357-3
D. Madhan, V. Devabharathi, Suganthi Muthusamy, Thangabalu Subramani
{"title":"CoAl-LDH incorporated g-C3N4 nanosheets: a dual-function photocatalyst for hydrogen production and dye degradation","authors":"D. Madhan,&nbsp;V. Devabharathi,&nbsp;Suganthi Muthusamy,&nbsp;Thangabalu Subramani","doi":"10.1007/s11581-025-06357-3","DOIUrl":"10.1007/s11581-025-06357-3","url":null,"abstract":"<div><p>The construction of heterojunction nanostructures and the engineering of their morphology are regarded as significant strategies for enhancing photocatalytic performance. This study presents the preparation of a novel binary g-C<sub>3</sub>N<sub>4</sub>/@CoAl-LDH heterostructure photocatalyst, achieved through the hydrothermal synthesis interpret, which involved the loading of well-dispersed g-C<sub>3</sub>N<sub>4</sub> nanosheets onto the surface of the CoAl-layered double hydroxide (CoAl-LDH) precursor. The investigation of the samples encompassed an examination of their surface morphology, crystalline structure, and chemical state through the utilisation of scanning electron microscopy (SEM), X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The findings suggest a precisely calibrated band gap energy spanning from pure CoAl-LDH to pure CN. Furthermore, the significant attenuation of the photoluminescence signal and the extended lifetime of photogenerated charges, as evidenced by time-resolved photoluminescence spectra, underscore the exceptional photocatalytic performance of these composites. The as-prepared 15 mol% CoAl-LDH/CN exhibited a remarkable photocatalytic hydrogen evolution rate of 3377 µmol h<sup>−1</sup> g<sup>−1</sup>, which was seven times higher than that of pure CoAl-LDH (477 µmol h<sup>−1</sup> g<sup>−1</sup>). The enhanced activity could be mainly attributed to its unique structure and high surface area. Distinct from ordinary heterojunction photocatalysts, two-dimensional (2D) heterojunctions with abundant 2D coupling interfaces and strong interfacial interaction could efficiently suppress the recombination of photo-induced charge carriers and shorten charge transmission distance demonstrate an enhanced ability to effectively mitigate the recombination of photo-induced charge carriers while also reducing the distance required for charge communication. The sample was further monitored to degrade crystal violet (CV) under visible light. The highest photocatalytic efficiency was recorded for the 15 mol% CoAl-LDH/CN, which achieved 99% degradation efficiency and reaction rate constant (k) of 0.0871 min<sup>−1</sup>. Radical scavenging experiments showed that<sup><b>⋅</b></sup>OH, e<sup>−</sup>, and h<sup>+</sup> played significant roles in the degradation process.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"7177 - 7190"},"PeriodicalIF":2.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluating the optimal cathode material for energy storage devices: a comparative study of LiFePO₄ and LiMnPO₄ using electric impedance 评价储能器件最佳正极材料:用电阻抗法比较LiFePO₄和LiMnPO₄
IF 2.6 4区 化学
Ionics Pub Date : 2025-05-10 DOI: 10.1007/s11581-025-06382-2
Gharam A. Alharshan, Hosam M. Gomaa, M. A. M. Uosif, E. R. Shaaban
{"title":"Evaluating the optimal cathode material for energy storage devices: a comparative study of LiFePO₄ and LiMnPO₄ using electric impedance","authors":"Gharam A. Alharshan,&nbsp;Hosam M. Gomaa,&nbsp;M. A. M. Uosif,&nbsp;E. R. Shaaban","doi":"10.1007/s11581-025-06382-2","DOIUrl":"10.1007/s11581-025-06382-2","url":null,"abstract":"<div><p>This study investigates the crystalline structure, phase compositions, and electrochemical properties of LiFePO₄, LiFe₀.₅Mn₀.₅PO₄, and LiMnPO₄ cathode materials using thermogravimetric analysis (TGA), X-ray diffraction (XRD) analysis, and impedance spectroscopy. XRD analysis revealed distinct peaks corresponding to each material, confirming their successful synthesis and high crystallinity. The incorporation of manganese resulted in shifts in peak positions, indicating changes in lattice parameters and unit cell volume. Impedance spectroscopy, conducted over a wide frequency range, showed that LiFePO₄ exhibited the lowest impedance, suggesting superior charge transport and lower resistance, while LiMnPO₄ showed the highest impedance, indicating greater resistance and potential challenges. LiFe₀.₅Mn₀.₅PO₄ displayed intermediate impedance characteristics. The Cole–Cole diagrams highlighted these differences, with LiFePO₄ demonstrating the smallest semicircular arc, indicating lower charge transfer resistance, while LiMnPO₄ exhibited the largest arc. The findings suggest that LiFePO₄ is the most efficient material for energy storage applications, while LiMnPO₄ requires optimization to improve its performance.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"6741 - 6752"},"PeriodicalIF":2.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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