IF 2.4 4区化学

Ionics Pub Date : 2025-02-20 DOI: 10.1007/s11581-025-06153-z

Yicun Wang, Senyu Qiu, Zhipeng Wang, Yang Yang, Jin Yu, Xiaodong Pei, Dongming Liu

{"title":"Synthesis and electrochemical properties of spinel LiMn2O4 derived from high-purity spherical Mn3O4","authors":"Yicun Wang, Senyu Qiu, Zhipeng Wang, Yang Yang, Jin Yu, Xiaodong Pei, Dongming Liu","doi":"10.1007/s11581-025-06153-z","DOIUrl":"10.1007/s11581-025-06153-z","url":null,"abstract":"<div>Spinel LiMn2O4 has been regarded as one of the most promising cathode materials due to its low cost, environmental friendliness, high thermal stability and safety. However, the issues such as manganese dissolution and Jahn–Teller effect result in significant capacity degradation during long high-temperature cycling, limiting its large-scale application. In this study, we develop a novel metal manganese corrosion-oxidation method to fabricate high-purity spherical Mn3O4, which is then employed as the superior manganese source for the synthesis of spinel LiMn2O4 via high-temperature solid-state process. Moreover, the effects of different lithium sources and mole ratios of lithium to manganese on the structure and electrochemical performance of LiMn2O4 are investigated. It was found that the obtained LiMn2O4 exhibits excellent electrochemical performance by using lithium carbonate as the lithium source with a lithium to manganese ratio of 0.53. The discharge capacities at 1 C and 10 C are 124.9 and 106.0 mAh/g, respectively, and the capacity retention after 200 cycles at 1 C is 93.7%. These excellent properties are attributed to the high-purity and spherical morphology of the Mn3O4 precursor, which dramatically improves the structural stability and electrochemical kinetics of LiMn2O4. This work provides a straightforward and cost-effective pathway for the large-scale industrial production of high-performance spinel LiMn2O4 cathode materials for lithium-ion batteries.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3231 - 3242"},"PeriodicalIF":2.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769918","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

Ultra-sensitive electro sensing of Pb(II) using newly designed Co3O4/RGO sensor: an advancement in Pb(II) detection 新设计的Co3O4/RGO传感器对Pb（II）的超灵敏电感测：Pb（II）检测的新进展

IF 2.4 4区化学

Ionics Pub Date : 2025-02-20 DOI: 10.1007/s11581-025-06155-x

Raveendra B. Manami, Manjunath B. Megalamani, Rajesh G. Kalkhambkar, Sharanappa T. Nandibewoor, Prashanth S. Adarakatti, Moamen S. Refat, Amnah Mohammed Alsuhaibani, Mohammad Arshad

{"title":"Ultra-sensitive electro sensing of Pb(II) using newly designed Co3O4/RGO sensor: an advancement in Pb(II) detection","authors":"Raveendra B. Manami, Manjunath B. Megalamani, Rajesh G. Kalkhambkar, Sharanappa T. Nandibewoor, Prashanth S. Adarakatti, Moamen S. Refat, Amnah Mohammed Alsuhaibani, Mohammad Arshad","doi":"10.1007/s11581-025-06155-x","DOIUrl":"10.1007/s11581-025-06155-x","url":null,"abstract":"<div>The detection of lead ions (Pb(II)) in environmental samples is crucial due to their significant toxicity and ability for triggering serious health and ecological harm, even at minimal concentrations. The Co3O4/RGO nanocomposite was used for modification of glassy carbon electrodes (GCE) for sensitive electrochemical detection of trace lead ions (Pb(II)) in environmental samples. This study generated cobalt oxide nanoparticles (Co3O4 NPs) by an effective precipitation process and functionalized them with reduced graphene oxide (RGO) to form a nanocomposite. The resultant materials were thoroughly characterized utilizing techniques such as powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The redesigned electrode showed remarkable electrochemical performance as measured by cyclic voltammetry (CV) and differential pulse stripping voltammetry (DPSV). The sensor had a linear response to Pb(II) concentrations ranging from 10 to 90 ppb, with a detection limit of 0.5 ppb estimated using the 3σ method. This novel sensor offers a promising platform for environmental monitoring of harmful heavy metals.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3757 - 3773"},"PeriodicalIF":2.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769917","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

A novel remaining useful life prediction for the lithium-ion battery using DPformer and enhanced optimization techniques 基于DPformer和增强优化技术的锂离子电池剩余使用寿命预测

IF 2.4 4区化学

Ionics Pub Date : 2025-02-19 DOI: 10.1007/s11581-025-06156-w

Delin Huang, Qiuyu Ran, Jinghui Yang, Dexian Wang, Xiangdong Su

{"title":"A novel remaining useful life prediction for the lithium-ion battery using DPformer and enhanced optimization techniques","authors":"Delin Huang, Qiuyu Ran, Jinghui Yang, Dexian Wang, Xiangdong Su","doi":"10.1007/s11581-025-06156-w","DOIUrl":"10.1007/s11581-025-06156-w","url":null,"abstract":"<div>It is critical to accurately predict the capacity and remaining useful life (RUL) of lithium-ion batteries (LIBs) for reliable operation and timely maintenance of electric vehicles. However, challenges persist due to the uncertainty in battery capacity degradation trends and interference from external noise. This study suggests a novel neural network model, DPformer, to capture the capacity fade trend and reduce interference from external noise, which integrates feature reconstruction, attention mechanism, and combined multi-layer perception. Firstly, the raw data is reconstructed and denoised by an automatic denoising encoder (ADE), and the long-term dependencies in time series information are effectively captured via the attention mechanism. Subsequently, the extracted multi-scale information is further processed by a designed feature pyramid decoder (FPD) to achieve better feather representations. In addition, a particle swarm optimization algorithm is improved to optimize the hyperparameters of the proposed model more precisely. Finally, the performance of the proposed is validated by using two public datasets. Experimental results demonstrate that the model achieves good performances in prediction accuracy and generalizability, and achieves up to 30–50% improvement in terms of relative error (RE).</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3295 - 3309"},"PeriodicalIF":2.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769915","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

Examination of oxygen reduction reaction on surfaces of Sc-Si52, Sc-C52 and Sc-Al26P26 Sc-Si52、Sc-C52和Sc-Al26P26表面氧还原反应的研究

IF 2.4 4区化学

Ionics Pub Date : 2025-02-19 DOI: 10.1007/s11581-025-06149-9

Zahraa Sabah Ghnim, Ayat Hussein Adhab, Anjan Kumar, Prakash Kanjariya, Asha Rajiv, Aman Shankhyan, Sachin Jaidka, Girish Chandra Sharma, Morug Salih Mahdi, Aseel Salah Mansoor, Usama Kadem Radi, Nasr Saadoun Abd

{"title":"Examination of oxygen reduction reaction on surfaces of Sc-Si52, Sc-C52 and Sc-Al26P26","authors":"Zahraa Sabah Ghnim, Ayat Hussein Adhab, Anjan Kumar, Prakash Kanjariya, Asha Rajiv, Aman Shankhyan, Sachin Jaidka, Girish Chandra Sharma, Morug Salih Mahdi, Aseel Salah Mansoor, Usama Kadem Radi, Nasr Saadoun Abd","doi":"10.1007/s11581-025-06149-9","DOIUrl":"10.1007/s11581-025-06149-9","url":null,"abstract":"<div>The potential of Sc-Si52, Sc-C52 and Sc-Al26P26 to catalyze the ORR pathways has been investigated. The possible mechanisms and corresponding parameters for reaction steps of ORR on Sc-Si52, Sc-C52 and Sc-Al26P26 have been investigated. The adsorption of Scandium atoms on Si52, C52 and Al26P26 nanocages can be improved the stability of Sc-Si52, Sc-C52 and Sc-Al26P26 nanocages, significantly. The adsorption energy (Eadsorption) of Scandium atoms on Si52, C52 and Al26P26 nanocages to create the Sc-Si52, Sc-C52 and Sc-Al26P26 are -4.13, -4.25 and -4.52 eV, respectively. The Sc atoms of Sc-Si52, Sc-C52 and Sc-Al26P26 are active sites for adsorption of species as the first step of ORR on studied catalysts. The formation of *OH-OH* is the rate-determining step on surfaces of Sc-Si52, Sc-C52 and Sc-Al26P26. The Sc-Al26P26 for ORR pathways has lower over-potential than Sc-Si52 and Sc-C52. Finally, the Sc-Al26P26 nano-catalyst is suggested as available catalyst for ORR processes with low over-potential and high efficiency.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3551 - 3557"},"PeriodicalIF":2.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769914","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

Sr2+-doped La1-xSrx(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3 high-entropy perovskite oxides as supercapacitor electrodes Sr2+掺杂La1-xSrx(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3高熵钙钛矿氧化物作为超级电容器电极

IF 2.4 4区化学

Ionics Pub Date : 2025-02-18 DOI: 10.1007/s11581-025-06150-2

ZiYi Wan, JingBo Lv, YaXin Zhang

{"title":"Sr2+-doped La1-xSrx(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3 high-entropy perovskite oxides as supercapacitor electrodes","authors":"ZiYi Wan, JingBo Lv, YaXin Zhang","doi":"10.1007/s11581-025-06150-2","DOIUrl":"10.1007/s11581-025-06150-2","url":null,"abstract":"<div>High-entropy perovskite oxides (HEPOs) have emerged as promising electrode materials for supercapacitors. In this study, we successfully synthesized a series of HEPOs La1-xSrx(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3, using the sol–gel method. We thoroughly investigated the impact of Sr doping on the electrochemical properties of HEPO materials. Our findings indicate that the incorporation of a small amount of Sr enhances ionic conductivity and promotes the formation of oxygen vacancies and ionic vacancies within the crystal structure. The incorporation of Sr significantly improves the electrochemical performance of HEPOs materials. La0.9Sr0.1(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3 electrode exhibits a maximum specific capacitance of 204.33 F/g at a scan rate of 2 mV/s, a significant increase compared to the undoped La(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3 sample. Furthermore, La0.9Sr0.1(Co0.2Mn0.2Fe0.2Ni0.2Cu0.2)O3 electrode exhibits excellent rate performance, maintaining 74% of its capacity when the current density was increased from 1 to 5 A/g. It also exhibits good cycling stability, with nearly no attenuation after 1000 cycles. Therefore, these results underscore the potential of our synthesized high-entropy perovskite oxides as electrode materials for supercapacitors applications.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3671 - 3682"},"PeriodicalIF":2.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769827","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

The impacts of anion and cation modification on the physicochemical properties of tris-(2-hydroxyethyl) ammonium-based protic and aprotic ionic liquids 阴离子和阳离子改性对三-（2-羟乙基）氨基质子和非质子离子液体理化性质的影响

IF 2.4 4区化学

Ionics Pub Date : 2025-02-17 DOI: 10.1007/s11581-025-06145-z

Ahmed Mohamed Abdelmagid, Abobakr Khidir Ziyada, Khalid Saad Mohamed Elkarsani

{"title":"The impacts of anion and cation modification on the physicochemical properties of tris-(2-hydroxyethyl) ammonium-based protic and aprotic ionic liquids","authors":"Ahmed Mohamed Abdelmagid, Abobakr Khidir Ziyada, Khalid Saad Mohamed Elkarsani","doi":"10.1007/s11581-025-06145-z","DOIUrl":"10.1007/s11581-025-06145-z","url":null,"abstract":"<div>The main distinguishing feature of protic ionic liquids (PILs) is that their cations have at least one accessible proton, which allows them to form hydrogen bonds with anions. Furthermore, their cost-effectiveness and straightforward synthesis technique make them suitable for large-scale applications. In the present work, a series of ammonium based protic ionic liquids (PILs) and aprotic ionic liquids (AILs), which are tris(2-hydroxyethyl)ammonium acetate ([HEA][Ac]), tris(2-hydroxyethyl)ammonium lactate ([HEA][La]), tris(2-hydroxyethyl)ammonium butyrate ([HEA][BU]), tris(2-hydroxyethyl)ammonium ascorbate ([HEA][AS]), allyl tris(2-hydroxyethyl)ammonium chloride ([AyHEA][Cl]), and benzyl tris(2-hydroxyethyl)ammonium chloride ([BzHEA][Cl]), were synthesized and characterized using nuclear magnetic resonance (NMR) spectroscopy, infrared spectroscopy (IR), and elemental analysis. The densities, viscosities, and refractive indices of these ILs were determined at temperatures ranging from 273.15 to 353.15 K. In addition, various thermodynamic properties, including the thermal expansion coefficient, molar refraction, standard molar entropy, and lattice energy, were estimated for these ILs. The results demonstrate that these ionic liquids (ILs) exhibit lower densities, comparable refractive indices and viscosities, and a lower decomposition temperature than their analogs based on tri-(2-hyroxyethyl) ammonium. In addition, the ILs exhibited a slight dependence on temperature for the thermal expansion coefficients, αp, which ranged from 6.27 × 10−4 to 7.07 × 10−4 K−1. These findings offer valuable information on the properties and potential uses of tris(2-hydroxyethyl)ammonium-based protic and aprotic ionic liquids containing carboxylate and chloride anions.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3407 - 3420"},"PeriodicalIF":2.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769810","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

Strategic design of mixed-phase nickel sulfide decorated rGO sheets for high-performance dual functionality in DSSC and supercapacitor electrodes 用于DSSC和超级电容器电极的高性能双功能的混合相硫化镍装饰氧化石墨烯片的战略设计

IF 2.4 4区化学

Ionics Pub Date : 2025-02-17 DOI: 10.1007/s11581-025-06139-x

E. Poongulali, S. Srinivasa Rao, Ramesh Jayaraman, Subramanian Annamalai

{"title":"Strategic design of mixed-phase nickel sulfide decorated rGO sheets for high-performance dual functionality in DSSC and supercapacitor electrodes","authors":"E. Poongulali, S. Srinivasa Rao, Ramesh Jayaraman, Subramanian Annamalai","doi":"10.1007/s11581-025-06139-x","DOIUrl":"10.1007/s11581-025-06139-x","url":null,"abstract":"<div>The growing need for large-scale energy storage demands the creation of multifunctional electrode materials. This paper describes the production and manufacture of mixed-phase nickel sulfide composites containing rGO for use as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs) and supercapacitor electrodes. XRD, SEM, XPS, and TEM were used to investigate the composites' structural, morphological, and optical features. The use of CEs in DSSC required the exploration of NiS/rGO composite CEs. The DSSC based on NiS/rGO20 attained a fill factor (FF) of 0.72 and a photoconversion efficiency of 7.95%, outperforming the pure NiS-based DSSC, which had an FF of 0.63 and a power conversion efficiency of 5.45%. In supercapacitor applications, the NiS/rGO20 electrode had a Cs of 801 F g−1 at a scan rate of 5 mV s−1, which was much higher than the pristine NiS electrode's capacitance of 545 F g−1 under the same circumstances. In supercapacitor assessments, the NiS/rGO20 electrode displayed a specific capacitance of 1015 F g⁻1 at a current density of 2 A g⁻1, showing a 24% boost over the pure NiS electrode. The asymmetric supercapacitor containing NiS/rGO20 and activated carbon attained an energy density of 43.8 Wh kg⁻1 at a power density of 1999 W kg⁻1, with 91% capacitance retention after 5000 cycles. The results show that NiS/rGO20 is a very efficient material for converting and storing energy purposes.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3591 - 3605"},"PeriodicalIF":2.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769857","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

NiO/Co3O4 nanocomposite electrode for high performance supercapacitor and oxygen evolution reaction applications 用于高性能超级电容器和析氧反应的NiO/Co3O4纳米复合电极

IF 2.4 4区化学

Ionics Pub Date : 2025-02-17 DOI: 10.1007/s11581-025-06137-z

Mohamed Sufiyan K T, Prabakaran K, Jandas P J, Sudheer Kumar

{"title":"NiO/Co3O4 nanocomposite electrode for high performance supercapacitor and oxygen evolution reaction applications","authors":"Mohamed Sufiyan K T, Prabakaran K, Jandas P J, Sudheer Kumar","doi":"10.1007/s11581-025-06137-z","DOIUrl":"10.1007/s11581-025-06137-z","url":null,"abstract":"<div>In this work, NiO/Co3O4 nanocomposite for energy storage and conversion applications has been synthesized using the hydrothermal method. The structural, optical, and morphological characteristics were analysed using X-ray diffraction, photoluminescence spectroscopy, and scanning electron microscopy techniques. As-prepared NiO/Co3O4 nanocomposite electrode exhibited a diffusion-controlled charge storage behavior with a remarkable storage capacity of 958 F/g at a current density of 1 A/g in 1 M KOH electrolyte solution. In spite after 4000 cycles at a current density of 5 A/g, the NiO/Co3O4 electrode showed higher cycling stability about 75% of its specific capacitance retention. The symmetric device exhibited a specific capacitance of 31.7 F/g at 1 A/g current density and achieved an energy density of 4.5 Wh/kg at a power density of 966 W/kg. A particularly promising outcome of this study was the device’s excellent cyclic stability, retaining 63% of its capacity after 3000 discharge cycles at a current density of 5 A/g. In addition, the NiO/Co3O4 nanocomposite electrode, when employed as an oxygen evolution reaction (OER) catalyst, highlights an admirable OER activity with overpotential of 340 mV at 10 mA/cm2 and a lower Tafel slope of 86 mV/decade. The stability tests also validate a tremendous performance of NiO/Co3O4 nanocomposite even after 10 h without obvious degradation.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3619 - 3629"},"PeriodicalIF":2.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769858","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

Exploring ZnMOF-74 as an anode material for lithium-ion batteries 探索ZnMOF-74作为锂离子电池负极材料

IF 2.4 4区化学

Ionics Pub Date : 2025-02-15 DOI: 10.1007/s11581-025-06132-4

Alena A. Starodubtseva, Tatyana V. Kan, Vladislav A. Dubrovskiy, Yaroslav S. Zhigalenok, Alina K. Galeyeva, Ivan A. Trussov

{"title":"Exploring ZnMOF-74 as an anode material for lithium-ion batteries","authors":"Alena A. Starodubtseva, Tatyana V. Kan, Vladislav A. Dubrovskiy, Yaroslav S. Zhigalenok, Alina K. Galeyeva, Ivan A. Trussov","doi":"10.1007/s11581-025-06132-4","DOIUrl":"10.1007/s11581-025-06132-4","url":null,"abstract":"<div>This study investigates the electrochemical properties of zinc-based metal–organic framework MOF-74 (ZnMOF-74) as a potential anode material for lithium-ion batteries (LIBs). Commercial graphite anodes are limited by a low specific capacity of 372 mAh/g, prompting the search for alternative materials with higher energy density. ZnMOF-74 was synthesized via a co-precipitation method and characterized using XRD, FTIR, SEM, and thermal analysis, confirming its crystalline structure and porosity. Electrochemical measurements, including cyclic voltammetry and galvanostatic cycling, revealed an initial high capacity exceeding 800 mAh/g in the first discharge cycle. However, a significant capacity drop to 273 mAh/g occurred in the second cycle, stabilizing around 67 mAh/g after 170 cycles. This rapid decline is attributed to the irreversible degradation of the MOF-74 framework during initial cycling, leading to the formation of Zn–Li compounds. The study concludes that the zinc center in MOF-74 does not facilitate electron mobility via the extended π-systems of the organic linker, hindering reversible redox processes and causing structural breakdown. Compared to MOFs with other metal centers like cobalt, ZnMOF-74 shows limited electrochemical reversibility and stability. Therefore, while ZnMOF-74 exhibits initial high capacity, its practical application as an anode material is constrained by structural degradation.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3173 - 3183"},"PeriodicalIF":2.4,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769736","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

Sodium- ion conducting PEO-PEMA based composite solid polymer electrolytes: structural, dielectric and electrochemical characteristics 钠离子导电PEO-PEMA基复合固体聚合物电解质：结构、介电和电化学特性

IF 2.4 4区化学

Ionics Pub Date : 2025-02-14 DOI: 10.1007/s11581-025-06133-3

Karan Kumar, Shweta Tanwar, Anil Arya, A. L. Sharma

{"title":"Sodium- ion conducting PEO-PEMA based composite solid polymer electrolytes: structural, dielectric and electrochemical characteristics","authors":"Karan Kumar, Shweta Tanwar, Anil Arya, A. L. Sharma","doi":"10.1007/s11581-025-06133-3","DOIUrl":"10.1007/s11581-025-06133-3","url":null,"abstract":"<div>In the present study, we report the synthesis of sodium-ion (Na+) conducting blended solid polymer electrolytes (PEO-PEMA) by the standard solution casting technique with SiO2 filler. X-ray diffractometer (XRD) and Field emission scanning electron microscopy (FESEM) confirmed the complete salt dissociation and provided evidence of the composite formation. Furthermore, Fourier transform infrared spectroscopy (FTIR) supported the XRD analysis. Impedance spectroscopy (EIS), linear sweep Voltammetry (LSV), and i-t curve characteristics are used to investigate the electrical properties. The high conductivity value (~ 8×({10}^{-5}) S cm−1 ) was obtainded for a 2% concentration of SiO2 by wt. It also exhibited a high operating voltage range (4.3 V) and a high value of transference number (0.99), which makes it a potential candidate for energy storage devices. The degree of polarization and supports the high conductivity, suggesting that ion migration is mainly due to the segmental motion of the polymer chain. The shifting of loss tangent peaks toward the higher frequency window reflects the reduction of relaxation time. Loss tangent analysis confirmed this decrease in relaxation time with nanofiller addition. Furthermore, complex conductivity analysis showed a strong dependence on nanofiller content. The sigma representation (σ′′ versus σ′) validated the decrease in relaxation time, which agrees with the loss tangent analysis. Ion transport parameters (n, μ, D) were evaluated using the Bruce-Vincent (B-M) method, electrochemical impedance spectroscopy, and FTIR analysis. All the transport parameters showed good agreement with each other. Finally, an ion transport mechanism based on experimental findings was proposed to examine the possible interactions in the polymer nanocomposite matrix.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 4","pages":"3363 - 3381"},"PeriodicalIF":2.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769798","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

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