Journal of Energy Chemistry最新文献

{"title":"Expediting *OH accumulation kinetics on metal-organic frameworks-derived CoOOH with CeO2 “accelerator” for electrocatalytic 5-hydroxymethylfurfural oxidation valorization","authors":"","doi":"10.1016/j.jechem.2024.07.030","DOIUrl":"10.1016/j.jechem.2024.07.030","url":null,"abstract":"<div><p>In this work, nickel foam supported CeO₂-modified CoBDC (BDC stands for terephthalic acid linker) metal-organic frameworks (NF/CoBDC@CeO₂) are prepared by hydrothermal and subsequent impregnation methods, which can be further transformed to NF/CoOOH@CeO₂ by reconstruction during the electrocatalytic test. The obtained NF/CoOOH@CeO₂ exhibits excellent performance in electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) because the introduction of CeO₂ can optimize the electronic structure of the heterointerface and accelerate the accumulation of *OH. It requires only a potential of 1.290 V_RHE to provide a current density of 50 mA cm⁻² in 1.0 M KOH + 50 mM HMF, which is 222 mV lower than that required in 1.0 M KOH (1.512 V_RHE). In addition, density-functional theory calculation results demonstrate that CeO₂ biases the electrons to the CoOOH side at the heterointerface and promotes the adsorption of *OH and *HMF on the catalyst surface, which lower the reaction energy barrier and facilitate the electrocatalytic oxidation process.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Side chain modulated ferrocene derivative as the interstitial conductive medium for high-performance and stable perovskite solar cells","authors":"","doi":"10.1016/j.jechem.2024.07.021","DOIUrl":"10.1016/j.jechem.2024.07.021","url":null,"abstract":"<div><p>The interfacial nonradiative recombination loss caused by the deep traps and mismatched band alignment restrained the commercial viability of perovskite solar cells (PSCs). Herein, we have constructed ferrocene carboxylic acid (FcA) and octafluoropentyl-ferrocenyl-carboxylate (OFFcA) interstitial conductive mediums to modulate the integral heterointerface properties and the photovoltaic performances of PSCs. By comparing the passivation strengths of the two molecules, we found that the synergistic effects among Fc/Fc⁺ redox shuttle, C=O group, and F substituents realize the optimal elimination of interfacial trap sources. Electron-withdrawing F groups reinforce the capacity of the Fc/Fc⁺ redox shuttle for the healing of metallic Pb defects and provide extensive anchoring sites to stabilize the organic components. Additionally, the homogeneity of the OFFcA layer as well as the humidity stability of perovskite film are facilitated through the introduction of F substituents, which reduce the contact resistance and improve the interfacial charge transfer. The champion OFFcA-modified device delivers an exceptional PCE of 23.62%, exceeding those of the control (PCE=22.32%) and FcA-modified (PCE=23.06%) devices. Moreover, the unencapsulated OFFcA-modified device retains 82.7% of the primary efficiency at 60% RH for more than 50 d and only loses less than 10% of the primary efficiency when stored in a glove box for more than 2000 h.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural engineering of Fe single-atom oxygen reduction catalyst with high site density and improved mass transfer","authors":"","doi":"10.1016/j.jechem.2024.07.028","DOIUrl":"10.1016/j.jechem.2024.07.028","url":null,"abstract":"<div><p>Fe-N-C catalysts are widely considered as promising non-precious-metal candidates for electrocatalytic oxygen reduction reaction (ORR). Yet despite their high catalytic activity through rational modulation, challenges remain in their low site density and unsatisfactory mass transfer structure. Herein, we present a structural engineering approach employing a soft-template coating strategy to fabricate a hollow and hierarchically porous N-doped carbon framework anchored with atomically dispersed Fe sites (FeNC-h) as an efficient ORR catalyst. The combination of hierarchical porosity and high exterior surface area is proven crucial for exposing more active sites, which gives rise to a remarkable ORR performance with a half-wave potential of 0.902 V in 0.1 <span>M</span> KOH and 0.814 V in 0.1 <span>M</span> HClO₄, significantly outperforming its counterpart with solid structure and dominance of micropores (FeNC-s). The mass transfer property is revealed by in-situ electrochemical impedance spectroscopy (EIS) measurement. The distribution of relaxation time (DRT) analysis is further introduced to deconvolve the kinetic and mass transport processes, which demonstrates an alleviated mass transport resistance for FeNC-h, validating the effectiveness of structural engineering. This work not only provides an effective structural engineering approach but also contributes to the comprehensive mass transfer evaluation on advanced electrocatalyst for energy conversion applications.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revealing the role and working mechanism of confined ionic liquids in solid polymer composite electrolytes","authors":"","doi":"10.1016/j.jechem.2024.07.027","DOIUrl":"10.1016/j.jechem.2024.07.027","url":null,"abstract":"<div><p>The confined ionic liquid (IL) in solid polymer composite electrolytes (SCPEs) can improve the performance of lithium metal batteries. However, the impact/role and working mechanism of confined IL in SCPEs remain ambiguous. Herein, IL was immobilized on SiO₂ (SiO₂@IL-C) and then used to prepare the confined SCPEs together with LiTFSI and PEO to study the impacts of confined-IL on the properties and performance of electrolytes and reveal the Li⁺ transport mechanism. The results show that, compared to the IL-unconfined SCPE, the IL-confined ones exhibit better performance of electrolytes and cells, such as higher ionic conductivity, higher <em>t</em>_Li⁺, and wider electrochemical windows, as well as more stable cycle performance, due to the increased dissociation degree of lithium salt and enlarged polymer amorphousness. The finite-element/molecular-dynamics simulations suggest that the IL confined on the SiO₂ provided an additional Li⁺ transport pathway (Li⁺ → SiO₂@IL-C) that can accelerate ion transfer and alleviate lithium dendrites, leading to ultrastable stripping/plating cycling over 1900 h for the Li/SCPEs/Li symmetric cells. This study demonstrates that IL-confinement is an effective strategy for the intelligent approach of high-performance lithium metal batteries.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In situ synthesis of SnPS3/Ti3C2Tx hybrid anode via molten salt etching method for superior sodium-ion batteries","authors":"","doi":"10.1016/j.jechem.2024.07.029","DOIUrl":"10.1016/j.jechem.2024.07.029","url":null,"abstract":"<div><p>Recently, SnPS₃ has gained attention as an impressive sodium-ion battery anode material because of its significant theoretical specific capacity derived from the conversion-alloying reaction mechanism. Nevertheless, its practical applicability is restricted by insufficient rate ability, and severe capacity loss due to inadequate electrical conductivity and dramatic volume expansion. Inspired by the electrochemical enhancement effect of MXene substrates and the innovative Lewis acidic etching for MXene preparation, SnPS₃/Ti₃C₂T<em>_x</em> MXene (T = <img>Cl and <img>O) is constructed by synchronously phospho-sulfurizing Sn/Ti₃C₂T<em>_x</em> precursor. Benefiting from the boosted Na⁺ diffusion and electron transfer rates, as well as the mitigated stress expansion, the synthesized SnPS₃/Ti₃C₂T<em>_x</em> composite demonstrates enhanced rate capability (647 mA h g⁻¹ at 10 A g⁻¹) alongside satisfactory long-term cycling stability (capacity retention of 94.6% after 2000 cycles at 5 A g⁻¹). Importantly, the assembled sodium-ion full cell delivers an impressive capacity retention of 97.7% after undergoing 1500 cycles at 2 A g⁻¹. Moreover, the sodium storage mechanism of the SnPS₃/Ti₃C₂T<em>_x</em> electrode is elucidated through in-situ and ex-situ characterizations. This work proposes a novel approach to ameliorate the energy storage performance of thiophosphites by facile in-situ construction of composites with MXene.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wearable flexible zinc-ion batteries based on electrospinning technology","authors":"","doi":"10.1016/j.jechem.2024.07.025","DOIUrl":"10.1016/j.jechem.2024.07.025","url":null,"abstract":"<div><p>Flexible wearable batteries are widely used in smartwatches, foldable phones, and fitness trackers due to their thinness and small size. Zinc-based batteries have the advantages of low cost, high safety, and eco-friendliness, which are considered to be the best alternative to flexible lithium-ion batteries (LIBs). Therefore, wearable flexible zinc-ion batteries (FZIBs) have attracted considerable interest as a promising energy storage device. Electrospun nanofibers (ESNFs) have great potential for application in wearable FZIBs due to their low density, high porosity, large specific surface area, and flexibility. Moreover, electrospinning technology can achieve the versatility of nanofibers through structural design and incorporation of other multifunctional materials. This paper reviews a wide range of applications of electrospinning in FZIBs, mainly in terms of cathode, anode, separator, polymer electrolyte, and all-in-one flexible batteries. Firstly, the electrospinning device, principles, and influencing parameters are briefly described, showing its positive impact on FZIBs. Subsequently, the energy storage principles and electrode configurations of FZIBs are described, and some of the common problems of the batteries are illustrated, including zinc anode dendrite growth, corrosion, cathode structure collapse, and poor electrical conductivity. This is followed by a comprehensive overview of research progress on the individual components of FZIBs (cathode, anode, separator, and polymer electrolyte) from the perspective of electrostatically spun fiber materials and an in-depth study of all-in-one flexible batteries. Finally, the challenges and future development of FZIBs are individually concluded and look forward. We hope that this work will provide new ideas and avenues for the development of advanced energy technologies and smart wearable systems.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Promoting electroreduction of nitrite to ammonia over electron-deficient Pd modulated by rectifying Schottky contacts","authors":"","doi":"10.1016/j.jechem.2024.06.062","DOIUrl":"10.1016/j.jechem.2024.06.062","url":null,"abstract":"<div><p>Electrochemical nitrite reduction reaction (NO₂⁻RR) is a potential sustainable route for regulating the nitrogen cycle and ambient ammonia (NH₃) synthesis. However, it remains a challenge to precisely regulate the reaction pathways and inhibit competing reactions (e.g. hydrogenolysis) for efficient and selective NH₃ production in an aqueous solution environment. Here, we utilize the Schottky barrier-induced surface electric field to construct high-density electron-deficient Pd nanoparticles by modulating the N content in the carbon carrier to promote the enrichment and immobilization of NO₂⁻ on the electrode surface, which ensures the ultimate selectivity for NH₃. With these properties, Pd@N_0.14C with the highest N content achieved excellent catalytic performance for the reduction of NO₂⁻ to NH₃ with the 100% Faraday efficiency at −0.5 and −0.6 V vs. reversible hydrogen electrode (RHE) for NH₃ production, which was significantly better than Pd/C and Pd@N<em>_x</em>C samples with lower N content. This study opens new avenues for rational construction of efficient electrocatalysts for nitrite removal and NH₃ electrosynthesis.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms for the evolution of cell-to-cell variations and their impacts on fast-charging performance within a lithium-ion battery pack","authors":"","doi":"10.1016/j.jechem.2024.07.026","DOIUrl":"10.1016/j.jechem.2024.07.026","url":null,"abstract":"<div><p>Cell-to-cell variations (CtCV) compromise the electrochemical performance of battery packs, yet the evolutional mechanism and quantitative impacts of CtCV on the pack’s fast-charging performance remain unexplored. This knowledge gap is vital for the proliferation of electric vehicles. This study underlies the relationship between CtCV and charging performance by assessing the pack’s charge speed, final electric quantity, and temperature consistency. Cell variations and pack status are depicted using 2D parameter diagrams, and an mPnS configured pack model is built upon a decomposed electrode cell model. Variations in three single electric parameters, i.e., capacity (<em>Q</em>), electric quantity (<em>E</em>), and internal resistance (<em>R</em>), and their dual interactions, i.e., <em>E</em>-<em>Q</em> and <em>R</em>-<em>Q</em>, are analyzed carefully. The results indicate that <em>Q</em> variations predominantly affect the final electric quantity of the pack, while <em>R</em> variations impact the charge speed most. With incremental variances in cell parameters, the pack’s fast-charging capability first declines linearly and then deteriorates sharply as variations intensify. This research elucidates the correlations between pack charging capabilities and cell variations, providing essential insights for optimizing cell sorting and assembly, battery management design, and charging protocol development for battery packs.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing lead-free photovoltaic performance: Minimizing buried surface voids in tin perovskite films through weakly polar solvent pre-treatment strategy","authors":"","doi":"10.1016/j.jechem.2024.07.024","DOIUrl":"10.1016/j.jechem.2024.07.024","url":null,"abstract":"<div><p>Buried interfacial voids have always been a notorious phenomenon observed in the fabrication of lead perovskite films. The existence of interfacial voids at the buried interface will capture the carrier, suppress carrier transport efficiencies, and affect the stability of photovoltaic devices. However, the impact of these buried interfacial voids on tin perovskites, a promising avenue for advancing lead-free photovoltaics, has been largely overlooked. Here, we utilize an innovative weakly polar solvent pre-treatment strategy (WPSPS) to mitigate buried interfacial voids of tin perovskites. Our investigation reveals the presence of numerous voids in tin perovskites during annealing, attributed to trapped dimethyl sulfoxide (DMSO) used in film formation. The WPSPS method facilitates accelerated DMSO evaporation, effectively reducing residual DMSO. Interestingly, the WPSPS shifts the energy level of PEDOT:PSS downward, making it more aligned with the perovskite. This alignment enhances the efficiency of charge carrier transport. As the result, tin perovskite film quality is significantly improved, achieving a maximum power conversion efficiency approaching 12% with only an 8.3% efficiency loss after 1700 h of stability tests, which compares well with the state-of-the-art stability of tin-based perovskite solar cells.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance imidazole-containing polymers for applications in high temperature polymer electrolyte membrane fuel cells","authors":"","doi":"10.1016/j.jechem.2024.07.017","DOIUrl":"10.1016/j.jechem.2024.07.017","url":null,"abstract":"<div><p>This work focuses on the development of high temperature polymer electrolyte membranes (HT-PEMs) as key materials for HT-PEM fuel cells (HT-PEMFCs). Recognizing the challenges associated with the phosphoric acid (PA) doped polybenzimidazole (PBI) membranes, including the use of carcinogenic monomers and complex synthesis procedures, this study aims to develop more cost-effective, readily synthesized, and high-performance alternatives. A series of superacid-catalyzed polyhydroxyalkylation reactions have been carefully designed between <em>p</em>-terphenyl and aldehydes bearing imidazole moieties, resulting in a new class of HT-PEMs. It is found that the chemical structure of aldehyde-substituted <em>N</em>-heterocycles significantly impacts the polymerization reaction. Specifically, the use of 1-methyl-2-imidazole-formaldehyde and 1H-imidazole-4-formaldehyde monomers leads to the formation of high-viscosity, rigid, and ether-free polymers, denoted as PTIm-a and PTIm-b. Membranes fabricated from these polymers, due to their pendent imidazole groups, exhibit an exceptional capacity for PA absorption. Notably, PTIm-a, carrying methylimidazole moieties, demonstrates a superior chemical stability by maintaining morphology and structural stability during 350 h of Fenton testing. After being immersed in 75 wt% PA at 40 °C, the PTIm-a membrane reaches a PA content of 152%, maintains a good tensile strength of 13.6 MPa, and exhibits a moderate conductivity of 50.2 mS cm⁻¹ at 180 °C. Under H₂/O₂ operational conditions, a single cell based on the PTIm-a membrane attains a peak power density of 732 mW cm⁻² at 180 °C without backpressure. Furthermore, the membrane demonstrates stable cycle stability over 173 h within 18 days at a current density of 200 mA cm⁻², indicating its potential for practical application in HT-PEMFCs. This work highlights innovative strategies for the synthesis of advanced HT-PEMs, offering significant improvements in membrane properties and fuel cell performance, thus expanding the horizons of HT-PEMFC technology.</p></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":null,"pages":null},"PeriodicalIF":13.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S209549562400490X/pdfft?md5=f39bfada1b23608c46ee26e25a4ef44e&pid=1-s2.0-S209549562400490X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}