Journal of Power Sources最新文献_第4页

One-dimensional flexible supercapacitors based on ZnCo2O4/MnCoP composite electrodes with enhanced electrochemical performance 基于提高电化学性能的ZnCo2O4/MnCoP复合电极的一维柔性超级电容器

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239764

Haoran Shi , Danfeng Zhang , Zihao Guo , Jianhua Yu , Jing Sui , Qian Zhang , Liyan Yu , Lifeng Dong

{"title":"One-dimensional flexible supercapacitors based on ZnCo2O4/MnCoP composite electrodes with enhanced electrochemical performance","authors":"Haoran Shi , Danfeng Zhang , Zihao Guo , Jianhua Yu , Jing Sui , Qian Zhang , Liyan Yu , Lifeng Dong","doi":"10.1016/j.jpowsour.2026.239764","DOIUrl":"10.1016/j.jpowsour.2026.239764","url":null,"abstract":"<div><div>The increasing demand for flexible electronics in modern applications intensifies the need for adaptable, high-performance energy storage systems. Among them, one-dimensional flexible supercapacitors gain considerable attention for their structural integrity and mechanical flexibility. In this work, a ZnCo<sub>2</sub>O<sub>4</sub>@MnCoP (ZCO/MCP) composite is synthesized on nickel wire (NW) via a two-step hydrothermal method, while helical carbon fibers are grown on copper wire (CW) using chemical vapor deposition. The hierarchical structure of ZCO nanosheets decorated with MCP nanoparticles effectively enlarges the electroactive surface area and provides abundant redox sites. The synergistic interaction between the metal oxide and phosphide phases further enhances electrical conductivity and charge storage capability. An asymmetric flexible supercapacitor is assembled using NW@ZCO@MCP and CW@CF as the positive and negative electrodes, respectively. The device achieves volumetric and areal capacitances of 3.515 F cm<sup>−3</sup> and 0.0185 F cm<sup>−2</sup> at 0.2 A cm<sup>−3</sup>, with an energy density of 2.5 mWh cm<sup>−3</sup> and a power density of 320.011 mW cm<sup>−3</sup>. It also exhibits excellent cycling stability, retaining 85.54% of its initial capacitance after 7500 charge-discharge cycles. These results demonstrate the strong potential of the NW@ZCO@MCP//CW@CF architecture for flexible and miniaturized energy storage applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239764"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New fluorine-free triazine-anion-based ionic liquids as supercapacitors electrolytes 新型无氟三嗪阴离子液体作为超级电容器电解质

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239760

Mukhtiar Ahmed , Gaurav Tatrari , Sayantika Bhakta , Jyri-Pekka Mikkola , Solomon Tesfalidet

{"title":"New fluorine-free triazine-anion-based ionic liquids as supercapacitors electrolytes","authors":"Mukhtiar Ahmed , Gaurav Tatrari , Sayantika Bhakta , Jyri-Pekka Mikkola , Solomon Tesfalidet","doi":"10.1016/j.jpowsour.2026.239760","DOIUrl":"10.1016/j.jpowsour.2026.239760","url":null,"abstract":"<div><div>Fluorine-free supercapacitor (SCs) electrolytes are desirable to minimize environmental impact and toxicity while maintaining high electrochemical performance and long-term sustainability. Here, we introduce the new class of fluorine-free ionic liquids (ILs) engineered around the unique electron-deficient triazine-derived anion, 4,6-diethoxy-2-oxo-2H-1,3,5-triazin-5-ide (DET), coupled with <em>n</em>-tetrabutyl- phosphonium and ammonium cations. Both the ILs exhibit distinct and well-defined thermal behaviors, the former behaves as a glass-forming liquid, that is, have glass transition at −63 °C, while the latter exists as a supercooled liquid with complex thermal events and is <em>ca.</em> 90 K less thermally stable. We find relatively weaker cation–anion interactions – well supported by the FTIR data – and, thus higher ionic conductivity and higher electrochemical stability, with supporting voltage range up to 4.4 V, for (P<sub>4444</sub>)(DET) than in (N<sub>4444</sub>)(DET). (P<sub>4444</sub>)(DET) as SCs electrolyte delivers excellent capacitive performance within the 2.0 V window at 30 °C and 60 °C. The device achieved areal capacitance of 78 mF cm<sup>−2</sup> (at 0.146 mA cm<sup>−2</sup>) and gravimetric capacitance of 60.6 F g<sup>−1</sup> (at 0.15 A g<sup>−1</sup>) at 60 °C and delivered an energy density of 34.6 Wh kg<sup>−1</sup> and the power density of 1873 W kg<sup>−1</sup> while maintaining ∼94% capacitance retention and ∼98% coulombic efficiency after 1000 cycles. SCs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239760"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-interface film manipulated by single electrolyte additive containing -CF/-SO2F for cycling stability of graphite||NCM622 full cells 含-CF/-SO2F单电解质添加剂操纵双界面膜对石墨||NCM622全电池循环稳定性的影响

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-07 DOI: 10.1016/j.jpowsour.2026.239741

Haonan Huang , Lingling Huang , Shuai Chen , Youhao Liao , Weishan Li

{"title":"Dual-interface film manipulated by single electrolyte additive containing -CF/-SO2F for cycling stability of graphite||NCM622 full cells","authors":"Haonan Huang , Lingling Huang , Shuai Chen , Youhao Liao , Weishan Li","doi":"10.1016/j.jpowsour.2026.239741","DOIUrl":"10.1016/j.jpowsour.2026.239741","url":null,"abstract":"<div><div>Commercial lithium-ion batteries (LIBs) utilizing graphite anodes paired with high nickel layered oxide cathodes offer high energy density but face challenges related to electrode/electrolyte interface compatibility, limiting their large-scale applications in power and energy storage systems. This work proposes a single film-forming additive, methyl fluorosulfonyl difluoroacetate (MFSA) containing -CF and -SO<sub>2</sub>F groups, to simultaneously construct interfacial films on the anode and cathode surfaces, which significantly addresses the prevalent issues in LIBs. Electrochemical results demonstrate that the capacity retention of graphite||LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> pouch cell with 1 wt% MFSA improves from 53% to 86% after 150 cycles. Quantitative calculations and spectroscopic analysis reveal that MFSA preferentially reduces on the anode surface, forming a solid electrolyte interphase (SEI) film enriched with LiF, Li<sub>2</sub>SO<sub>3</sub>, and fluorinated polymers, thereby enhancing the structural stability of graphite anode. Furthermore, MFSA helps remove free HF while constructing a low-impedance cathode electrolyte interphase (CEI) film rich in LiF through early oxidation, which protects the structural integrity of NCM622 cathode and suppresses continuous electrolyte decomposition, finally improving the battery electrochemical performance. This work highlights the excellent film-forming characteristics of MFSA and its protective mechanism on both electrodes, providing valuable insights into designing electrolyte additives for enhanced electrochemical characteristics in high-energy-density LIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239741"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling activity-durability trade-off in coated Fe-N-C catalysts for oxygen reduction via pyrolysis-duration-driven structural evolution 通过热解-持续时间驱动的结构演化揭示Fe-N-C涂层氧还原催化剂的活性-耐久性权衡

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239758

Li Jiao , Geunsu Bae , Nicolas Donzel , Marc Dupont , Frédéric Lecoeur , Min Wook Noh , Anastassiya Khan , Andrea Zitolo , Laetitia Dubau , Goran Dražić , Chang Hyuck Choi , Frédéric Jaouen

{"title":"Unraveling activity-durability trade-off in coated Fe-N-C catalysts for oxygen reduction via pyrolysis-duration-driven structural evolution","authors":"Li Jiao , Geunsu Bae , Nicolas Donzel , Marc Dupont , Frédéric Lecoeur , Min Wook Noh , Anastassiya Khan , Andrea Zitolo , Laetitia Dubau , Goran Dražić , Chang Hyuck Choi , Frédéric Jaouen","doi":"10.1016/j.jpowsour.2026.239758","DOIUrl":"10.1016/j.jpowsour.2026.239758","url":null,"abstract":"<div><div>Fe-N-C catalysts stand out among precious-metal-free materials for the oxygen reduction reaction (ORR), yet their durability in acidic environments remains a critical challenge. The degradation pathways, particularly following high-temperature post-treatments, are not fully understood. In this study, we coated a benchmark Fe-N-C catalyst via chemical vapor deposition (CVD) using Zeolitic Imidazolate Framework-8 (ZIF-8), with dwell times ranging from 1 to 10 h at 1050 °C to tune the catalyst structure. During CVD process, a fraction of the Fe-N<sub>4</sub> sites was transformed into Fe nanoparticles due to the reducing environment created by volatile species derived from ZIF-8. This leads to decreased Fe-N<sub>4</sub> site density and turnover frequency, both contributing to decreased ORR activity. However, improved durability is observed, and can be explained in part by promoted graphitization catalyzed by Fe particles during pyrolysis. We reveal with online differential electrochemical mass spectrometry that CVD with ZIF-8 leads to strongly reduced carbon corrosion, an effect not observed when applying the same annealing treatment but without ZIF-8, supporting the deposition of a N-doped carbon coating in the former case. The study also reports the complex effect of CVD duration on activity, site density, turnover frequency and durability. Overall, these findings highlight the structural effects on ORR activity and durability of Fe-N-C catalysts, providing valuable insights for designing more robust Fe-N-C catalysts.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239758"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrosynthesis of formic acid and hydrogen via efficient glycerol oxidation on a 2-methylimidazole-modified NiCo LDH 2-甲基咪唑修饰NiCo LDH上甘油氧化电合成甲酸和氢

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239769

Jiaqi Tong, Zhi Ying, Pengfei Guo, Xiaoyuan Zheng, Binlin Dou, Guomin Cui

{"title":"Electrosynthesis of formic acid and hydrogen via efficient glycerol oxidation on a 2-methylimidazole-modified NiCo LDH","authors":"Jiaqi Tong, Zhi Ying, Pengfei Guo, Xiaoyuan Zheng, Binlin Dou, Guomin Cui","doi":"10.1016/j.jpowsour.2026.239769","DOIUrl":"10.1016/j.jpowsour.2026.239769","url":null,"abstract":"<div><div>The electrocatalytic glycerol oxidation reaction (GOR) coupled with the hydrogen evolution reaction (HER) presents an innovative strategy for the co-production of value-added chemicals and green hydrogen. However, its efficiency is often hindered by the sluggish kinetics of conventional layered metal catalysts. Herein, we report a nickel-cobalt layered double hydroxide (NiCo LDH) electrocatalyst synthesized via a 2-methylimidazole-modified strategy, which significantly enhances GOR performance. The optimized catalyst exhibits a low potential of 1.44 V vs. RHE to deliver 100 mA cm<sup>−2</sup> and achieves a high Faradaic efficiency of 93.7% for formic acid. When integrated into a two-electrode GOR||HER system, the catalyst enables stable operation at 300 mA cm<sup>−2</sup> with a hydrogen Faradaic efficiency of 96.5%. Both experimental and mechanistic studies demonstrate that 2-methylimidazole not only directs the formation of a well-defined layered architecture but also modulates the surface chemistry by increasing oxygen content and optimizing Ni–Co electronic synergy, which collectively enhance the adsorption of active oxygen intermediates and boost GOR performance. This work provides a rational ligand-mediated approach for designing high-performance layered electrocatalysts toward the efficient glycerol valorization and hydrogen production.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239769"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic interfacial effects in NiFe layered double hydroxide-coupled ZnO/α-Fe2O3 photoanodes toward improved photoelectrochemical functionality NiFe层状双氢氧化物耦合ZnO/α-Fe2O3光阳极的协同界面效应对提高光电电化学功能的影响

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239787

Yuan-Chang Liang, Kun-Hsien Chang

{"title":"Synergistic interfacial effects in NiFe layered double hydroxide-coupled ZnO/α-Fe2O3 photoanodes toward improved photoelectrochemical functionality","authors":"Yuan-Chang Liang, Kun-Hsien Chang","doi":"10.1016/j.jpowsour.2026.239787","DOIUrl":"10.1016/j.jpowsour.2026.239787","url":null,"abstract":"<div><div>In this study, we develop ternary heterojunction photoanodes with a hierarchical structure by electrodepositing a NiFe Layered Double Hydroxide (NiFe-LDH) cocatalyst onto ZnO/α-Fe<sub>2</sub>O<sub>3</sub> (ZF) heterojunction materials. Surface imaging reveals that the distinct structures of ZnO nanosheets, α-Fe<sub>2</sub>O<sub>3</sub> nanorods, and NiFe-LDH nanosheets are linked to improved photoelectrochemical performance. A ladder-like Type-II band alignment in the ZnO/α-Fe<sub>2</sub>O<sub>3</sub>/NiFe-LDH (ZFL) architecture promotes efficient separation of photogenerated electrons and holes, thereby suppressing recombination and enhancing the visible-light photoresponse, reducing recombination and enhancing visible light absorption. We also propose how changing the Ni/Fe molar ratio in NiFe-LDH affects performance, confirmed by compositional analysis. The NiFe-LDH cocatalyst speeds up surface oxidation by forming NiOOH intermediates, which increases the electrode's hydrophilicity and decreases charge transfer resistance. This research proposes a strategy that combines band structure control and surface wettability improvement to boost photoelectrochemical efficiency in ternary heterostructures.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239787"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep learning-enabled large-scale analysis of particle geometry-lithiation correlations in battery cathode materials 电池正极材料中颗粒几何与锂化相关的深度学习大规模分析

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239806

Binbin Lin , Luis J. Carrillo , Xiang-Long Peng , Wan-Xin Chen , David A. Santos , Sarbajit Banerjee , Bai-Xiang Xu

{"title":"Deep learning-enabled large-scale analysis of particle geometry-lithiation correlations in battery cathode materials","authors":"Binbin Lin , Luis J. Carrillo , Xiang-Long Peng , Wan-Xin Chen , David A. Santos , Sarbajit Banerjee , Bai-Xiang Xu","doi":"10.1016/j.jpowsour.2026.239806","DOIUrl":"10.1016/j.jpowsour.2026.239806","url":null,"abstract":"<div><div>A deep learning model is employed to address the challenging problem of V<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math></span> nanoparticle segmentation and the correlation between the chemical composition and the geometrical features of lithiated V<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math></span> nanoparticles as an exemplar of a phase-transforming battery cathode material. First, the deep learning-enabled segmentation model is integrated with the singular value decomposition technique and a spectral database to generate accurate composition and phase maps capturing lithiation heterogeneities as imaged using scanning transmission X-ray microscopy. These phase maps act as the output properties for correlation analysis. Subsequently, the quantitative influences of the geometrical features of nanoparticles such as the particle size (i.e., projected perimeter and area), the aspect ratio, circularity, convexity, and orientation on the lithiation phase maps are revealed. These findings inform strategies to improve lithiation uniformity and reduce stress in phase-transforming lithium battery materials via optimized particle geometry.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239806"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High potential activated multifunctional additive inducing favorable electrode-electrolyte interface for nickel-rich batteries cycling at 4.7 V 高电位活化多功能添加剂诱导富镍电池在4.7 V循环时良好的电极-电解质界面

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-07 DOI: 10.1016/j.jpowsour.2026.239803

Chaoqi Shen, Chenxi Fu, Lulu Liu, Peng Yang, Kexin Cai, Lianbang Wang

{"title":"High potential activated multifunctional additive inducing favorable electrode-electrolyte interface for nickel-rich batteries cycling at 4.7 V","authors":"Chaoqi Shen, Chenxi Fu, Lulu Liu, Peng Yang, Kexin Cai, Lianbang Wang","doi":"10.1016/j.jpowsour.2026.239803","DOIUrl":"10.1016/j.jpowsour.2026.239803","url":null,"abstract":"<div><div>Lithium metal batteries paired with high-voltage nickel-rich cathodes offer high energy density. However, stable operation at ultra-high voltages (>4.5 V) requires suppression of severe interfacial degradation. Herein, difluoropyridine-boronic acid (DFPBA) is proposed as a multifunctional electrolyte additive to construct synergistic electrode/electrolyte interphases (EEIs). DFPBA preferentially decomposes to form a dense hybrid cathode electrolyte interface (CEI) comprising LiF, Li<sub>3</sub>N and LiB<sub>x</sub>O<sub>y</sub>. Simultaneously, DFPBA optimizes the solid electrolyte interphase (SEI) on lithium metal anodes, enhancing structural integrity. The lone-pair electrons of nitrogen (N) atoms in DFPBA suppress HF formation, while boric acid derivatives reinforce EEI mechanical stability. Consequently, the rapidly formed CEI at 4.7 V enables the Li||NCM622 cells to achieve 80.4% capacity retention after 400 cycles, surpassing cells without DFPBA (45.5%). This study demonstrates the exceptional electrochemical performance achieved with NCM622 cathodes at high voltages, providing pivotal insights for developing advanced electrolytes targeting demanding energy storage systems.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239803"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pathways to cost-effective electrochemical CO2 reduction: Role of energy mix, intermittency, and weather conditions in formic acid production 具有成本效益的电化学CO2减排途径：能源组合、间歇性和天气条件在甲酸生产中的作用

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239776

Mohamed B. El Ghrib , Youssef Elaouzy , Jaouad Eddouibi , Houssam Bouaboula , Dawid P. Hanak , Youssef Belmabkhout , Abdelghafour Zaabout

{"title":"Pathways to cost-effective electrochemical CO2 reduction: Role of energy mix, intermittency, and weather conditions in formic acid production","authors":"Mohamed B. El Ghrib , Youssef Elaouzy , Jaouad Eddouibi , Houssam Bouaboula , Dawid P. Hanak , Youssef Belmabkhout , Abdelghafour Zaabout","doi":"10.1016/j.jpowsour.2026.239776","DOIUrl":"10.1016/j.jpowsour.2026.239776","url":null,"abstract":"<div><div>The electrochemical reduction of CO<sub>2</sub> to formic acid represents a promising avenue for renewable energy storage and carbon utilization. Its feasibility depends on electricity supply configuration, intermittency, and regional energy characteristics. This study introduces an intermittency-aware, system-level framework that explicitly addresses hourly renewable variability and modular electrolyzer load-following under dynamic power conditions, in contrast to conventional techno-economic assessments that assume a steady-state electricity input. A dynamic model incorporating a three-compartment electrolyzer, downstream separations, and renewable intermittency is developed across four locations with varying weather and grid profiles. Economic and environmental performance is evaluated, including levelized cost of formic acid, net present value, return on investment, CO<sub>2</sub> abatement cost, and global warming intensity under conservative, moderate, and optimistic scenarios across the period 2030-2050. Wind-rich locations enable renewable-only CO<sub>2</sub> electrolysis, achieving levelized formic acid costs of 0.46-0.50 $/kg by 2050, below current market prices, while reaching negative CO<sub>2</sub> abatement costs. Hybrid PV-wind systems approach competitiveness (0.53-0.57 $/kg) without storage, whereas battery integration becomes unfavorable beyond short durations (>4 h). Grid electricity significantly degrades economic and environmental performance, especially under carbon pricing. Overall, CO<sub>2</sub> electrolysis viability is strongly location-dependent and governed by renewable quality, limited storage, and constrained grid use.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239776"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Defect-engineered exfoliated MoS2/rGO hybrids for dual-function oxygen electrocatalysis and high-capacity Li-O2 batteries 用于双功能氧电催化和高容量Li-O2电池的缺陷工程剥离MoS2/rGO混合材料

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-07 DOI: 10.1016/j.jpowsour.2026.239800

Sekar Sandhiya , Rajendran Saravanan , Perumal Elumalai

{"title":"Defect-engineered exfoliated MoS2/rGO hybrids for dual-function oxygen electrocatalysis and high-capacity Li-O2 batteries","authors":"Sekar Sandhiya , Rajendran Saravanan , Perumal Elumalai","doi":"10.1016/j.jpowsour.2026.239800","DOIUrl":"10.1016/j.jpowsour.2026.239800","url":null,"abstract":"<div><div>Pristine bulk MoS<sub>2</sub> (BMS) and the bulk MoS<sub>2</sub>@reduced graphene oxide (BMR) composites are synthesized via a single-step hydrothermal method, while exfoliated MoS<sub>2</sub> (EMS) nanosheets and their respective composites (EMR) with the reduced graphene oxide (rGO) are prepared using a simple sonication-assisted route. The synthesized catalysts are systematically characterized to elucidate their phase composition, defect chemistry and morphology, and were evaluated as bifunctional oxygen electrocatalysts using rotating ring-disk electrode (RRDE) analysis. Among all the catalysts, the exfoliated MoS<sub>2</sub> containing 80 wt% rGO (EMR80) catalyst achieves a positive ORR onset potential of 0.90 V, a high limiting current density of 6.85 mA cm<sup>−2</sup>, very low OER overpotential of 290 mV, and a low bifunctionality index of 0.21 V. The improved electrocatalytic performance arises from the 1T phase of exfoliated MoS<sub>2</sub>, which possesses defect-rich features, such as few MoS<sub>2</sub> layers having reduced crystallite size and increased lattice disorder. When applied as the air cathode in a coin-type Li-O<sub>2</sub> battery (LOB), the EMR80 catalyst delivers an impressive discharge capacity of 17000 mA h g<sup>−1</sup> at a current density of 100 mA g<sup>−1</sup> with a low charge overpotential of 1 V.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239800"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0