Energy technology最新文献

{"title":"Physical and Chemical Surface Modification of Recycled Polystyrene Films for Improved Triboelectric Properties","authors":"Līva Ģērmane,&nbsp;Astrīda Bērziņa,&nbsp;Raivis Eglītis,&nbsp;Mairis Iesalnieks,&nbsp;Jānis Lungevičs,&nbsp;Artis Linarts,&nbsp;Andris Šutka,&nbsp;Linards Lapčinskis","doi":"10.1002/ente.202400762","DOIUrl":"10.1002/ente.202400762","url":null,"abstract":"<p>Polystyrene (PS) is a very common material in packaging. In this study, it is recycled by turning it into energy harvesting devices: triboelectric generators. Herein, heat-pressed films of recycled PS are formed and their surfaces are modified physically and chemically. The triboelectric properties of the films are determined using a dynamic testing machine, and the performance of the triboelectric generators is evaluated with a high-speed contact–separation system. The developed charge density of the triboelectric generator increases two orders of magnitude—from 0.03 to 1.52 nC cm⁻²—by combining these surface modification methods. Such high values of charge density enable the production of single material triboelectric generators.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kesterite Films Processed with Organic Solvents: Unveiling the Impact of Carbon-Rich Fine-Grain-Layer Formation on Solar-Cell Performance","authors":"Ahmed Javed,&nbsp;Doguscan Donmez,&nbsp;Michael D. K. Jones,&nbsp;Yongtao Qu,&nbsp;Gorkem Gunbas,&nbsp;Selcuk Yerci","doi":"10.1002/ente.202400646","DOIUrl":"10.1002/ente.202400646","url":null,"abstract":"<p>Solution-processed kesterite (copper zinc tin sulfide [CZTS]) solar cells attract significant attention owing to their low cost, ease of large-scale production, and earth-abundant elemental composition, which make these devices promising to fulfill the ever-increasing demand of the photovoltaic (PV) industry. Compared to the performances of expensive vacuum-based techniques, colloidal nanocrystal kesterite solar cells garner substantial interest due to their economical and rapid processing. Led by the hot-injection method, organic solvent-based techniques are widely adopted to realize CZTS nanocrystal inks. With organic solvents, ligand-stabilized nanoparticles are formed leading to dispersive and homogenous kesterite inks. However, the presence of carbon-rich ligands around the nanocrystal surface often leads to the formation of a fine-grain layer that is rich in carbon content. The organic ligands decompose into amorphous carbon residues during a high-temperature annealing process and hinder the grain growth process. The carbon-rich fine-grain (CRFG) layer generally poses a negative influence on the PV performance of the kesterite solar cell; however, few reports maintain their disposition about CRFG as innocuous. In this review study, a detailed discussion on CRFG is presented, aiming to understand the insights about its formation and impact on the device's performance.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202400646","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degradation of MoOx Thin-Films Properties in Excessive Oxygen Environments and Its Influence on Dopant-Free Silicon Solar Cells","authors":"Yu Hu,&nbsp;Junjun Li,&nbsp;Jiale Feng,&nbsp;Xuelin Yue,&nbsp;Yuhui Ji,&nbsp;Yuepeng Li,&nbsp;Fan Tang,&nbsp;Yi Tian,&nbsp;Jian Yu","doi":"10.1002/ente.202400338","DOIUrl":"10.1002/ente.202400338","url":null,"abstract":"&lt;p&gt;Transition metal oxides such as molybdenum oxide (MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt;) demonstrate significant potential as efficient hole-selective passivating contacts in silicon heterojunction solar cells. Achieving efficient hole collection necessitates precise control over the optical and electrical properties of MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; films. In this study, the effects of oxygen flow rate (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$F_{O_{2}} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) on the growth, optical properties, and electrical properties of thermally evaporated MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; films are investigated. In the Kelvin probe force microscopy results, it is indicated that MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; thin-film deposition followed an island-to-layer growth model. X-ray photoelectron spectroscopy shows that MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; films exhibit stoichiometric composition with fully oxidized Mo&lt;sup&gt;6+&lt;/sup&gt; ions, without additional oxygen. Notably, the O 1s orbital peak shifts toward higher binding energy with increased &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$F_{O_{2}} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, indicating defect introduction. Consequently, the work function of MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; films decreases from 5.93 to 5.51 eV as &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$F_{O_{2}} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; increases from 0 to 8 sccm. The maximum optical bandgap of the MoO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; films exceeds 3.60 eV. As a proof of concept, &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$F_{O_{2}} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Overview of Electron Transport Layer Materials and Structures for Efficient Organic Photovoltaic Cells","authors":"Shawbo Abdulsamad Abubaker,&nbsp;Mohd Zamir Pakhuruddin","doi":"10.1002/ente.202400285","DOIUrl":"10.1002/ente.202400285","url":null,"abstract":"<p>The electron transport layer (ETL) has gained significant attention recently for its essential role in facilitating charge extraction, transportation, and reducing recombination in photovoltaic cells. Organic photovoltaics (OPVs) with ETLs have achieved remarkable efficiencies exceeding 19%, and indoor OPVs have reached a peak efficiency of 29.4% under 3000 LX illumination. Despite these accomplishments, the difficulties in choosing appropriate ETLs for contact alignment have constrained device performance. This review comprehensively overviews the latest advancements in ETL materials used in conventional and inverted OPVs. Additionally, it investigates the evolution of dopant materials, emphasizing the need for improved electron mobility, energy level alignment, and surface passivation treatment of the buffer layer and absorber layers in OPVs. Continual studies of transport materials and the potential utilization of doping or multilayer ETLs are suggested as inevitable research toward achieving higher power conversion efficiency and stability in OPV technology. Additionally, identifying optimal ETL materials capable of synergistic interactions remains crucial for sustained progress in renewable energy technology.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Thermal-Conductive AlN-Shell-Encapsulated Al Phase-Change Macrocapsules for High-Temperature Heat Storage","authors":"Yunqi Guo,&nbsp;Haonan Guo,&nbsp;Zhihao Zhang,&nbsp;Nan Sheng,&nbsp;Elisabetta Gariboldi,&nbsp;Chunyu Zhu","doi":"10.1002/ente.202400360","DOIUrl":"10.1002/ente.202400360","url":null,"abstract":"<p>High-temperature metallic phase-change material is a very promising material alternative to traditional sensible heat-storage materials in thermal energy storage systems. Nevertheless, the challenges such as their susceptibility to corrosive behavior, vulnerability to leakage, and proneness to oxidation in high-temperature liquid phase present significant constraints that hinder their widespread applications. In this article, an approach to fabricate millimeter-scale phase-change capsules for macroscopic encapsulation of Al with high-thermal-conductive AlN shell is introduced. The study encompasses the preparation of Al@AlN macrocapsules with inner cavity, which can accommodate thermal volume expansion, through the direct powder formation combined with a two-step sintering process, under a comparative evaluation of the atmospheric treatments involving N₂, O₂, and Ar. As the result, a calcination temperature of 1000 °C in Ar atmosphere is proper for the capsule formation. The Al metal core of the as-obtained capsule shows a latent heat of fusion of 347.4 J g⁻¹ and a melting temperature of 655.6 °C. The Al@AlN capsules also exhibit good thermal and stability, ensuring their potential application in high-temperature heat storage and utilization.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Situ Synthesis of Self-Floating Janus Fe3O4@IF Evaporator for Solar-Driven Interfacial Evaporation","authors":"Lingxue Kong,&nbsp;Ye Jia,&nbsp;Ke Zeng,&nbsp;Yuping Wang,&nbsp;Tengdi Zhang,&nbsp;Anmin Liu,&nbsp;Liguo Gao,&nbsp;Tingli Ma","doi":"10.1002/ente.202400746","DOIUrl":"10.1002/ente.202400746","url":null,"abstract":"<p>Solar-driven interfacial evaporation is one of the most promising technologies to address global freshwater shortages. Compared with the integrated structure, monolithic system with asymmetric wettability can be used alone to reduce the structural complexity without sacrificing the localized management of heat. Herein, a monolithic structure of Janus Fe₃O₄@IF evaporator with asymmetric wettability has been fabricated via a simple in situ hydrothermal method. The low-cost Janus Fe₃O₄@IF evaporator can be self-floating with a sizable surface area, high porosity, and low density, which presents excellent light absorption features of 98.1% within a broadband wavelength range of 200–2500 nm. Due to the strong capillarity action and Janus wettability, the evaporation is efficient (1.64 kg m⁻² h⁻¹) and stable even treating with highly concentrated brine of 20 wt%. This work demonstrates an effective strategy for achieving high-performance solar-driven interfacial evaporation and superior salt rejection capability, which can be potentially utilized in seawater desalination.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Phase Change Absorbent for CO2 Capture with Low Viscosity and Effective Absorption–Desorption Properties","authors":"Jianchao Han,&nbsp;Zihan Qiu,&nbsp;Yuyan Chen,&nbsp;Xia Gui,&nbsp;Xiao Chen","doi":"10.1002/ente.202400114","DOIUrl":"10.1002/ente.202400114","url":null,"abstract":"<p>Excessive carbon dioxide (CO₂) emissions can lead to environmental problems, and the use of phase change absorbents for CO₂ capture has received much attention due to their excellent absorption and desorption properties. Herein, a novel liquid–liquid phase change absorbent consisting of N-aminoethylpiperazine (AEP), diethylene glycol dimethyl ether (DEGDME), and H₂O is utilized. Under the optimal absorption conditions, the absorption capacity is 1.23 mol CO₂·mol⁻¹ amine. The rich-phase viscosity of the AEP/DEGDME/H₂O solution is only 6.2 mPa s⁻¹, and the rich phase-to-volume ratio is 52.7%, which is suitable for industrial applications. After five cycles of absorption–desorption experiments, the cyclic capacity reaches 0.62 mol CO₂·mol⁻¹ amine. However, it should be noted that this leads to an increase in the viscosity of the solution with time. The ¹³C Nuclear Magnetic Resonance characterization is used to analyze the material distribution and phase separation mechanism, and it is found that during the absorption process, the carbamate and carbonate products generated by the reaction of the amino group in the AEP with CO₂ are mainly located in the rich phase, while the DEGDME and H₂O mainly remain in the lean phase. In the desorption process, most of the absorbed products are decomposed, and the regeneration efficiency is 66.8%. Through the regeneration energy consumption experiment, when the regeneration efficiency is 56%–67%, the total regeneration energy consumption is 2.71–2.89 GJ t⁻¹ CO₂, which is 0.91–1.09 GJ t⁻¹ CO₂ lower than that of the regeneration efficiency of 30 wt% MEA solution at 63%, which indicates that this absorbent has certain energy-saving advantages.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing a Cost-Effective and Sustainable Process for the Efficient Production of Planar Anode-Supported Solid Oxide Fuel Cells","authors":"Laura Parvaix,&nbsp;Pascal Lenormand,&nbsp;Patrick Rozier","doi":"10.1002/ente.202400266","DOIUrl":"10.1002/ente.202400266","url":null,"abstract":"<p>A sustainable process is designed to produce anode-supported solid oxide fuel cells (SOFCs). Environmentally friendly solvents and additives are selected to prepare sequentially cast slurries to obtain a flexible multilayer tape whose cohesion is ensured by a 3D network of binder. This tape includes the components of the oxide precursor of the half cell with the functional and structural part of the anode. The optimization of debinding and sintering processes allows converting green tape into sintered multilayer ceramic using a single heat treatment. The use of optimized loads maintains planarity of samples with adjusted shape (circular to square) and size (from 0.8 up to 8 cm²) of anodic half cell. The cell's oxide precursor is supplemented by screen printing the cathode and converted to anode-support SOFC when the cell is first used. The whole process maintains mechanical integrity, microstructure of structured components, and insures interfaces enabling charge transfer high enough to achieve standard performances such as power of 411 mW cm⁻². The selection of cheap and harmless solvents and additives and the optimization of heat treatment lead to an ecocompatible low-cost process for manufacturing SOFCs, easily transferable to the industrial scale and suitable for the manufacture of all systems based on ceramic multilayers.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202400266","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-Dimensionally Arranged NiSe2 Nanosheets as an Efficient Electrocatalyst for Methanol Electrooxidation Reaction","authors":"Nabi Ullah,&nbsp;Dariusz Guziejewski,&nbsp;Asim Mahmood,&nbsp;Sami Ullah,&nbsp;Sikandar Khan,&nbsp;Shahid Hussain,&nbsp;Muhammad Imran","doi":"10.1002/ente.202400390","DOIUrl":"10.1002/ente.202400390","url":null,"abstract":"<p>Methanol oxidation stands out as a pivotal solution in addressing the global energy crisis and environmental pollution, owing to its practical applicability, high current density, and the ready availability of methanol as a fuel source. To effectively catalyze methanol oxidation, an electrocatalyst is imperious to overcome the activation energy barrier. Herein, a three-dimensionally arranged NiSe₂ nanosheet-based electrocatalyst is synthesized through a facile solvothermal followed by an annealing method. The catalyst's porous structure enhances catalytic efficiency by providing a substantial electrochemical surface area (ECSA) equivalent to 0.121 mF cm⁻². Notably, the electrocatalyst exhibits a remarkable response of 21.58 mA cm⁻² at an overpotential of 1.70 V vs RHE, accompanied by the lowest Tafel slope recorded at 39.14 mV dec⁻¹. The electronic circuit, represented by <i>R</i>_s(<i>Q</i>_f(<i>R</i>_f<i>W</i>(<i>Q</i>_dl<i>R</i>_ct)), aligns well with electrochemical impedance spectroscopy data, elucidating the reaction path and intrinsic properties. Furthermore, the catalytic performance is elucidated concerning ECSA and weight, revealing current densities of 5.60 mA cm⁻² and 71.34 mA mg⁻¹, respectively. Impressively, the catalyst demonstrates exceptional resistance to poisoning and sustained stability over a continuous 3600-s operation. This comprehensive study underscores the promising potential of the NiSe₂ nanosheet-based electrocatalyst for efficient methanol oxidation, providing valuable insights for advancing clean energy technologies.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic Enhancement of Supercapacitor Performance: Vanadium-Substituted Phosphotungstic and Molybdic Acid Combined with Polypyrrole Using Pyridinium and Ammonium Ionic Containing Organic Cation Linkers with Improved Conductivity","authors":"Muhammed Anees Puniyanikkottil,&nbsp;Pranay Rajendra Chandewar,&nbsp;Debaprasad Shee,&nbsp;Sib Sankar Mal","doi":"10.1002/ente.202400708","DOIUrl":"10.1002/ente.202400708","url":null,"abstract":"<p>High-performance energy-storage devices have emerged as a favored choice owing to their remarkable efficiency, sustainability, and environmental friendliness. Nowadays, polyoxometalate (POM)-based supercapacitor (SC) electrode materials have gained much attention. Herein, a few new POMs and ionic liquid (IL) composites incorporated into conducting polymer as electrode materials for SC applications are reported. The H₆[PV₃Mo₉O₄₀]⋅34H₂O (PV₃Mo₉) and H₆[PV₃W₉O₄₀].34H₂O (PV₃W₉) POMs are treated with tetrabutylammonium chloride and 1-butyl-4-methyl pyridinium chloride (BMP) and finally combined with polypyrrole (PPy) for the SC studies. An extensive array of analytical techniques is employed to delve into the interplay between the constituents within the composite materials, such as Fourier transform infrared spectroscopy, powder X-ray diffraction, thermogravimetric analysis, nuclear magnetic resonance (¹H and ¹³C), Field-emission scanning electron microscopy, energy-dispersive X-ray stpectroscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller surface area. The combined application of these techniques enables us to understand the interaction dynamics within composite materials comprehensively. POM–ILs combination improves the solubility issues of POMs, and doping of PPy enhances the electrochemical performances of the materials. The PV₃W₉–BMP–PPy symmetric SC cell shows a specific capacitance of 294.79 F g⁻¹ and an energy density of 28.89 Wh kg⁻¹ at 1 A g⁻¹ current density in 0.25 M H₂SO₄ medium followed by an excellent cycle life of 78.6% after 10,000 galvanostatic charge–discharge cycles. The fabricated SC device is performed to light up the bulbs of red, yellow, and green light emitting diodes for 50, 30, and 28 s, respectively.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}