Journal of Materials Chemistry A最新文献

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A Base-Assisted One-Pot Cyclization and Potassium Association Route to a Very Thermally Stable Bistetrazole Salt 一种碱辅助一锅环化和钾缔合制得非常热稳定的双四唑盐
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-24 DOI: 10.1039/d5ta05027h
Parul Saini, Jatinder Singh, Richard J. Staples, Jean'ne M. Shreeve
{"title":"A Base-Assisted One-Pot Cyclization and Potassium Association Route to a Very Thermally Stable Bistetrazole Salt","authors":"Parul Saini, Jatinder Singh, Richard J. Staples, Jean'ne M. Shreeve","doi":"10.1039/d5ta05027h","DOIUrl":"https://doi.org/10.1039/d5ta05027h","url":null,"abstract":"Pursuing next-generation energetic materials has prompted researchers to investigate novel combinations of structural and energetic properties. In this study, we constructed a coordination-driven bisnitroimino-tetrazole scaffold, dipotassium 1,1′-methylene bis(1-nitroimino tetrazolate) (K₂MBNIT), which exhibits ultra-high thermal stability, remarkably surpassing the thermal performance of previously reported bistetrazole-based potassium salts such as K₂DNABT (potassium 4,5-bis(dinitromethyl)furoxannate) and K₂ABNAT (5,5′-azobis(1-nitroimino tetrazolate). The synthetic route to K₂MBNIT features two key transformations: an initial tetrazole ring opening and a subsequent ring-closing reaction to form the final bistetrazole structure. In the cyclization step, K₂MBNIT is selectively obtained from the unprecedently formed precursor, 1,1′-methylene bis(1-azido-1-nitroiminomethylene) (4). K₂MBNIT exhibits a decomposition temperature comparable to heat-resistant energetic materials and sensitivity akin to primary explosives, presenting a unique combination of desirable properties for modern applications such as hypersonic weapons, space missions, and deep-well drilling. The straightforward synthetic methodology, methylene-assisted structural stabilization, and superior heat resistance collectively highlight K₂MBNIT as a promising candidate for a next-generation energetic material.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"73 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145127532","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}
引用次数: 0
Bidentate Coordination-Induced Trap Passivation and Phase Stability in Perovskite Solar Cells via Ionic Liquid Engineering 离子液体工程钙钛矿太阳能电池双齿配位诱导阱钝化和相稳定性研究
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-24 DOI: 10.1039/d5ta05220c
Dohun Baek, Meng Qiang Li, Jeongbeom Cha, Alam Shabaz, Subin Choi, Hye Min Oh, Jinseck Kim, Jaewon Lee, Min Kim
{"title":"Bidentate Coordination-Induced Trap Passivation and Phase Stability in Perovskite Solar Cells via Ionic Liquid Engineering","authors":"Dohun Baek, Meng Qiang Li, Jeongbeom Cha, Alam Shabaz, Subin Choi, Hye Min Oh, Jinseck Kim, Jaewon Lee, Min Kim","doi":"10.1039/d5ta05220c","DOIUrl":"https://doi.org/10.1039/d5ta05220c","url":null,"abstract":"Ionic liquid (IL) engineering has emerged as a promising strategy to improve the performance and stability of perovskite solar cells (PSCs), especially under ambient processing conditions. In this work, we investigate the role of 1-(2-ethoxyethyl)-1-methylpyrrolidinium dicyanamide (Pyr-DCA) as an additive for perovskite precursor solutions and compare its passivation effects with those of the widely used thiocyanate (SCN⁻)-based IL. Density functional theory (DFT) simulations reveal that DCA⁻ exhibits stronger binding affinity to undercoordinated Pb<small><sup>2+</sup></small> ions due to its bidentate nitrogen coordination, effectively passivating deep-level trap states. Incorporation of Pyr-DCA into the perovskite film leads to increased grain size, improved crystallinity, and lower trap density, resulting in enhanced charge carrier lifetimes and reduced nonradiative recombination. Devices treated with Pyr-DCA show improved power conversion efficiency (PCE), moisture resistance, and long-term operational stability. In-situ GIWAXS measurements performed under 1 Sun illumination and electrical bias confirm that DCA⁻ suppresses the formation of degradation-associated δ-phase and PbI<small><sub>2</sub></small> , maintaining the structural integrity of the perovskite α-phase. This work highlights the dual chemical and structural stabilization offered by DCA⁻ and demonstrates its promise for enabling scalable and stable PSC fabrication under ambient conditions.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"40 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145127540","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}
引用次数: 0
Impact of Chitosan's Degree of Deacetylation, Molecular Weight, and Crystallinity on the Photoresponsive Properties of Azobenzene-modified Films and Membranes 壳聚糖脱乙酰度、分子量和结晶度对偶氮苯改性薄膜光响应性能的影响
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta05276a
Nils von Seggern, Yannick M Thiebes, Rainer Niewa, Stefan Cord-Landwehr, Bruno Moerschbacher, Günter E. M. Tovar, Linus Stegbauer
{"title":"Impact of Chitosan's Degree of Deacetylation, Molecular Weight, and Crystallinity on the Photoresponsive Properties of Azobenzene-modified Films and Membranes","authors":"Nils von Seggern, Yannick M Thiebes, Rainer Niewa, Stefan Cord-Landwehr, Bruno Moerschbacher, Günter E. M. Tovar, Linus Stegbauer","doi":"10.1039/d5ta05276a","DOIUrl":"https://doi.org/10.1039/d5ta05276a","url":null,"abstract":"A profound understanding of how the degree of deacetylation (DDA), degree of polymerization (DP) and photoswitch concentration impact the photomodulation of properties of chitosan (CS)based responsive materials can serve as a framework for future applications. Herein, we report responsive thin-films manufactured from chitosans with DDAs ranging from 70-94% and DPs ranging from 170-3380, incorporating 10-30mol% of the light-responsive azobenzene derivativeDuring UV irradiation of the 10-30% TEGABS|CS thin-films, e.g. a significant increase in the indentation modulus of 10 ± 5% is observed. UV illumination leads to a decrease in water vapor permeability (WVP), which is reduced by up to 81 ± 17% compared with that of the native state. We demonstrate that TEGABS up to 10% remains as a solid-solution in CS films with differing amounts of H-aggregates depending on the DDA and DP. TEGABS at concentrations &gt;10% in CS leads to phase separation of TEGABS crystallites with a diameter of 21 ± 8 nm. To conclude, photothermal heating by UV irradiation and the resulting water evaporation are identified as the primary driving force for the variation in mechanical properties and WVP, with photoisomerization acting as a subordinate factor. These findings provide a new pathway for the design of polysaccharide-based water vapor permeable photoresponsive membranes.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"82 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117031","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}
引用次数: 0
Construction of high surface area of perovskite-based catalyst by in-situ interfacial reaction for dry reforming of methane: Ni-doped LaAlO3 as a case study 原位界面反应制备高表面积钙钛矿基甲烷干重整催化剂——以ni掺杂LaAlO3为例
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta04670j
shangmeng ning, jiahao Qi, Yuan Liu, Yongdan Li, Cuijuan Zhang
{"title":"Construction of high surface area of perovskite-based catalyst by in-situ interfacial reaction for dry reforming of methane: Ni-doped LaAlO3 as a case study","authors":"shangmeng ning, jiahao Qi, Yuan Liu, Yongdan Li, Cuijuan Zhang","doi":"10.1039/d5ta04670j","DOIUrl":"https://doi.org/10.1039/d5ta04670j","url":null,"abstract":"The perovskite-based materials are widely studied in heterogeneous catalysis; however, the low surface area seriously limits their practical application. Herein, this work proposes a strategy to prepare high surface area perovskite, by in-situ interfacial reaction between the loaded metal ions and the support. Specifically, lanthanum and nickel ions are sequentially loaded onto the commercial alumina support to prepare Al2O3 supported Ni-doped LaAlO3 for dry methane reforming as a case study. The properties of the resultant Ni-doped LaAlO3 strongly depend on the ratio of La to Al. Increasing La:Al from 0.1 to 1.0 leads to decrease in specific surface area, the sample with La:Al of 1.0 still delivers high surface area of 32 m2/g. Such high surface area renders the catalysts high robustness towards variation in space velocity and feed gas composition. The Ni nanoparticles exsoluted from the perovskite matrix are much smaller and higher dispersion compared with the La-free sample, which contribute to the high capability towards CH4 and CO2 activation. The higher content of medium and strong basic sites substantially promotes the stability over 200 h. The samples with La:Al of 0.1 and 0.5 show only ~1% decreases in activity compared with 3% for La-free sample. The sample with La:Al of 0.1 shows the highest activity and stability, CH4 and CO2 conversion and H2/CO of 92.3%, 88.1% and 0.91, respectively, at 120,000 mL/(h·gcat). The strategy proposed in this work is believed to spur the study on the perovskite-based catalysts and thus promote their practical application. Furthermore, the strategy can be extended to prepare other types of complex catalysts such as spinel and pyrochlore of high surface area.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"79 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117017","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}
引用次数: 0
Emerging multimetal LMFP-based cathodes for lithium-ion batteries: A review 锂离子电池用多金属lmpf阴极研究进展
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta03194j
Josué M. Gonçalves, Syra Mubarac, Gustavo Thalmer de Medeiros Silva, Bruno Freitas, Benedito G. Aguiar Neto, Hudson Zanin
{"title":"Emerging multimetal LMFP-based cathodes for lithium-ion batteries: A review","authors":"Josué M. Gonçalves, Syra Mubarac, Gustavo Thalmer de Medeiros Silva, Bruno Freitas, Benedito G. Aguiar Neto, Hudson Zanin","doi":"10.1039/d5ta03194j","DOIUrl":"https://doi.org/10.1039/d5ta03194j","url":null,"abstract":"The increasing demand for smart portable electronics and electric vehicles is driving advancements in high-energy-density lithium-ion batteries (LIBs). Among various cathode materials, lithium manganese iron phosphate (LiMnyFe1-yPO4 - LMFP) stands out due to its cost-effectiveness, excellent safety profile, long cycle life, high operating voltage, robust thermal stability, and competitive energy density. However, despite notable progress, LMFP still encounters key challenges such as limited electronic conductivity, sluggish Li-ion diffusion, manganese dissolution affecting cycling stability, and low tap density. To address these issues, significant efforts have been devoted to developing multimetal LMFP and other multimetal olivine-based cathodes with enhanced electrochemical properties. Nevertheless, a comprehensive review of these recent advancements remains lacking. This article aims to bridge this gap by examining emerging strategies and recent developments in multimetal LMFP cathodes for LIBs. It systematically compares various optimization approaches, including (i) doping with single or multiple elements at Li-, M-, or Li&amp;M-sites, (ii) integrating additional primary constituents or structural components, and (iii) increasing the configurational entropy of electrode materials. The advantages and limitations of these strategies are critically assessed. Furthermore, key synthesis methodologies and processing techniques used to enhance LMFP cathode performance are discussed. Finally, the review provides insights into the benefits and challenges associated with these materials, highlighting future perspectives and potential research directions.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"41 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117034","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}
引用次数: 0
Separation and purification of 5-hydroxymethylfurfural by metal‒organic frameworks 金属-有机框架分离纯化5-羟甲基糠醛
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta05030h
Lei Wang, Hailong He, Lulu Deng, Yuhao Luo, Qiang Liu, Xiaoying Zhu
{"title":"Separation and purification of 5-hydroxymethylfurfural by metal‒organic frameworks","authors":"Lei Wang, Hailong He, Lulu Deng, Yuhao Luo, Qiang Liu, Xiaoying Zhu","doi":"10.1039/d5ta05030h","DOIUrl":"https://doi.org/10.1039/d5ta05030h","url":null,"abstract":"5-Hydroxymethylfurfural (HMF) is an important sugar-based platform chemical that can be produced from fructose by acid-catalyzed dehydration. However, the efficient removal of by-products formic acid (FA), levulinic acid (LA) and residual fructose to obtain high purity HMF remains a challenge, especially the separation of LA and HMF. Herein, by introducing coordination interaction, we effectively separated HMF from impurities. MOF-808 selectively adsorbed the impurity components with high adsorption capacity and selectivity factor for Fru (238 mg/gads, 43.8), FA (174 mg/gads, 53.5), and LA (325 mg/gads, 43.8). Moreover, the adsorption kinetic constants for MOF-808 on FA and LA could reach remarkably high values of 58.0 h-1 and 25.9 h-1, respectively. The efficient adsorption separation performance of MOF-808 is attributed to its abundant unsaturated paired sites and hard Lewis acidity. Additionally, in practical column separation, MOF-808 showed outstanding separation performance and cycling stability. This study indicates coordination interactions are effective for the separation and purification of HMF.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"41 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117014","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}
引用次数: 0
Facile fabrication of hybrid carbon molecular sieve membranes based on β-cyclodextrin/polyimide for efficient gas separation 基于β-环糊精/聚酰亚胺的杂化碳分子筛膜的制备及其高效气体分离
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta06017f
Zhongde Dai, Xinyu Wang, Min Deng, Zimei Zhang, Weiyuan Liang, Ruyun Yan, Ziheng Jin, Yao Lu, Lin Yang, Wenju Jiang, Junfeng Zheng
{"title":"Facile fabrication of hybrid carbon molecular sieve membranes based on β-cyclodextrin/polyimide for efficient gas separation","authors":"Zhongde Dai, Xinyu Wang, Min Deng, Zimei Zhang, Weiyuan Liang, Ruyun Yan, Ziheng Jin, Yao Lu, Lin Yang, Wenju Jiang, Junfeng Zheng","doi":"10.1039/d5ta06017f","DOIUrl":"https://doi.org/10.1039/d5ta06017f","url":null,"abstract":"The development of high-performance carbon molecular sieve (CMS) membrane materials is critical to advancing next-generation gas separation technology. In this work, β-cyclodextrin (β-CD) was incorporated into polyimide (PI) through a straightforward solution-casting process to fabricate hybrid precursor membranes, which were subsequently carbonized into hybrid CMS membranes. By optimizing both β-CD content and carbonization temperature, the resulting hybrid CMS membranes exhibited exceptional gas separation performances. Under optimal conditions, the hybrid membranes with 3% β-CD, carbonized at 550 °C demonstrated extraordinarily enhanced gas permeability (PCO2=6634.4 Barrer, PH2=15535.3 Barrer, and PHe=4282.9 Barrer, together with significantly improved gas selectivties (αCO2/N2=33.1, αCO2/CH4 =40.0, αH2/N2 =66.5, and αH2/CH4 =79.5), which is 159%, 217%, 536% and 736% times of the pure PI precursor, and surpassing the latest Robeson upper bound for H2 and CO2 separation. The high separation performances together with its facile blending preparation method, making it promising for gas separation.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"79 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116915","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}
引用次数: 0
Carbon Dimensionality Engineering in Manganese Oxide Composite Electrodes for High-Efficiency Electrochemical Deionization 用于高效电化学去离子的氧化锰复合电极的碳维工程
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta05964j
Meng-Fei Wu, Yi-Heng Tu, Hung-Yi Huang, Hsin-Mei Chou, Chi-Chang Hu
{"title":"Carbon Dimensionality Engineering in Manganese Oxide Composite Electrodes for High-Efficiency Electrochemical Deionization","authors":"Meng-Fei Wu, Yi-Heng Tu, Hung-Yi Huang, Hsin-Mei Chou, Chi-Chang Hu","doi":"10.1039/d5ta05964j","DOIUrl":"https://doi.org/10.1039/d5ta05964j","url":null,"abstract":"Electrochemical deionization (ECDI) has emerged as a promising technology for brackish water treatment and water softening, offering notable advantages in energy efficiency and environmental sustainability. This study systematically investigates the effect of carbon dimensionality on the performance of sodium manganese oxide–carbon composite electrodes (NMO@Cs) for cation capture, in combination with polypyrrole–carbon composites (PPy@Cs) for anion capture. To this end, carbon substrates with distinct dimensionalities—including one-dimensional (1D) carbon nanotubes (CNTs), two-dimensional (2D) reduced graphene oxide (rGO), and three-dimensional (3D) activated carbon (AC) were integrated with sodium pre-intercalated manganese oxide (NMO) to form the NMO@Cs composites. The structural, electrochemical, and desalination performances of these composites are thoroughly characterized and compared. Among the tested configurations, the system with NMO@rGO as the sodium-captured electrode exhibits the highest salt removal capacity (SRC) of 67.2 mg g–1, while the cell using NMO@CNT demonstrates the best cycling stability, retaining 96.8% of its SRC after 200 cycles. The system with NMO@AC shows moderate performance but offers clear cost advantages due to its low material cost and simple processing. Additionally, compared to MnOx, the pre-intercalation of sodium ions stabilizes the layered NMO structure and provides more active sites, enhancing the Na-ion removal capacity and efficiency. Overall, this work provides valuable insights into the rational design of high-performance carbon-based composite electrodes for advanced ECDI applications.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"89 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116911","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}
引用次数: 0
A defective 2D Fe-N-C nanofilm embedded with porous carbon derived from dicyandiamide as an effective oxygen reduction catalyst for PEMFC 一种含有双氰胺衍生多孔碳的缺陷二维Fe-N-C纳米膜作为PEMFC的有效氧还原催化剂
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta05898h
Haotian Liu, Xiangju Zhou, Tao Liu, Runfei Yue, Bin Chen, Yabiao Pei, Lianqin Wang, Junfeng Zhang, Yan Yin
{"title":"A defective 2D Fe-N-C nanofilm embedded with porous carbon derived from dicyandiamide as an effective oxygen reduction catalyst for PEMFC","authors":"Haotian Liu, Xiangju Zhou, Tao Liu, Runfei Yue, Bin Chen, Yabiao Pei, Lianqin Wang, Junfeng Zhang, Yan Yin","doi":"10.1039/d5ta05898h","DOIUrl":"https://doi.org/10.1039/d5ta05898h","url":null,"abstract":"Two-dimensional (2D) materials with high specific surface areas are considered promising precursors for creating highly effective Fe-N-C catalysts that improve the oxygen reduction reaction (ORR) activity, thereby lowering costs of catalyst layer (CL) in proton exchange membrane fuel cells (PEMFC). However, 2D materials tend to agglomerate while preparing the MEA, compromising PEMFC performance. In this study, we introduce a Fe-N-C catalyst using an ultrathin 2D N-doped carbon film (NCF) derived from a ZIF precursor through the metal salt-assisted pyrolysis approach. The active sites are fabricated via Fex+ adsorption and dicyandiamide (DCDA)-assisted pyrolysis. Adding DCDA improves the coordination environment of Fe and forms defects on the surface of the catalyst, promoting the exposure of the Fe active site. The porous carbon particles derived from DCDA result in hierarchical pores in the CL, promoting the utilization of active sites. The resulting catalyst (NCF-Fe-DCDA) exhibits superior ORR activity, achieving a half-wave potential (E1/2) of 0.831 VRHE in acidic conditions. The MEA equipped with NCF-Fe-DCDA CL demonstrates low mass-transport overpotential and a remarkable power density of 845 mW cm-2 (H2/O2) conditions. This research introduces an innovative approach for the synthesis of 2D Fe-N-C catalysts for PEMFC application.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"61 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117016","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}
引用次数: 0
Humidity Stability of Halide Solid-State Electrolytes 卤化物固态电解质的湿度稳定性
IF 11.9 2区 材料科学
Journal of Materials Chemistry A Pub Date : 2025-09-23 DOI: 10.1039/d5ta06216k
Tiancai Ren, Xingyu Chen, Haochang Zhang, Hao Zhang, Wei Xia
{"title":"Humidity Stability of Halide Solid-State Electrolytes","authors":"Tiancai Ren, Xingyu Chen, Haochang Zhang, Hao Zhang, Wei Xia","doi":"10.1039/d5ta06216k","DOIUrl":"https://doi.org/10.1039/d5ta06216k","url":null,"abstract":"Halide solid-state electrolytes (HSSEs) are regarded as highly promising electrolyte materials for solid-state batteries due to their high ionic conductivity, wide electrochemical window, and excellent mechanical processability. However, their extreme sensitivity to humidity leads to chemical decomposition in humid environments, causing crystalline structure collapse and electrochemical performance decay, which severely restricts practical applications. This review is designed to serve as an all-inclusive handbook for studying this critical issue. First, this paper systematically reviews the research progress in the humidity stability of HSSEs, and delves into the origins of humidity instability through hard and soft acids and bases (HSAB) theory, thermodynamic, and kinetic analysis. Next, the characterization of humidity stability is discussed across three dimensions: macroscopic reaction phenomena; microstructure and chemical composition; electrochemical performance.Finally, strategies for enhancing humidity stability are summarized from three aspects: elemental substitution, novel material design, and surface engineering. Furthermore, promising future research directions for developing highly humidity-stable HSSEs are proposed.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"24 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117015","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}
引用次数: 0
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