Journal of Power Sources最新文献_第8页

Prussian blue analogue functionalized separators regulating Li+ flux for dendrite-suppressed lithium metal anodes 普鲁士蓝模拟功能化分离器调节枝晶抑制锂金属阳极的Li+通量

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-14 DOI: 10.1016/j.jpowsour.2025.238605

Fangyi Tian, Le Hu, Junlong Feng, Hangqi Yang, Pu Hu, Chaoqun Shang

{"title":"Prussian blue analogue functionalized separators regulating Li+ flux for dendrite-suppressed lithium metal anodes","authors":"Fangyi Tian, Le Hu, Junlong Feng, Hangqi Yang, Pu Hu, Chaoqun Shang","doi":"10.1016/j.jpowsour.2025.238605","DOIUrl":"10.1016/j.jpowsour.2025.238605","url":null,"abstract":"<div><div>The development of high-energy-density lithium metal batteries (LMBs) is crucial for advanced energy storage but is hindered by uncontrolled lithium dendrite growth, largely stemming from non-uniform Li<sup>+</sup> flux induced by commercial polypropylene (PP) separators. To address this, we fabricate a functionalized separator by modifying a PP separator with Prussian blue analog (PBA)-derived composite material (denoted as PG@PB). The resulting PP/PG@PB separator features a nanoscale porous structure that effectively regulates Li<sup>+</sup> transport, significantly increasing Li<sup>+</sup> transference number to 0.80 and promoting uniform Li deposition. Electrochemical characterization demonstrates that a Li||Li symmetrical cell employing PP/PG@PB achieves exceptional cycling stability, operating for 800 h at 1 mA cm<sup>−2</sup> with fixed specific capacity of 1 mAh cm<sup>−2</sup>. Furthermore, the Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO)||Li full battery assembled with PP/PG@PB exhibits superior long-term cycling performance, retaining a high discharge capacity of ∼157 mAh g<sup>−1</sup> after 1000 cycles at 1C. These results underscore the crucial role of PP/PG@PB in homogenizing Li<sup>+</sup> flux and suppressing Li dendrite formation, providing significant insights for designing high-performance LMBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238605"},"PeriodicalIF":7.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323338","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

Enhanced electrochemical performance of dendritic Fe2O3 nanowires on hollow carbon nanofibers with manganese and phosphorus co-doping for solid-state symmetric supercapacitors 锰磷共掺杂在空心碳纳米纤维上增强树枝状Fe2O3纳米线用于固态对称超级电容器的电化学性能

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-13 DOI: 10.1016/j.jpowsour.2025.238447

Milan Babu Poudel , Dharma Raj Kandel , Prakash Chandra Lohani , Ae Rhan Kim , Hyo Bin Kwak , Dong Jin Yoo

{"title":"Enhanced electrochemical performance of dendritic Fe2O3 nanowires on hollow carbon nanofibers with manganese and phosphorus co-doping for solid-state symmetric supercapacitors","authors":"Milan Babu Poudel , Dharma Raj Kandel , Prakash Chandra Lohani , Ae Rhan Kim , Hyo Bin Kwak , Dong Jin Yoo","doi":"10.1016/j.jpowsour.2025.238447","DOIUrl":"10.1016/j.jpowsour.2025.238447","url":null,"abstract":"<div><div>Maximizing the energy and power density of supercapacitors requires a sophisticated hierarchical three-dimensional structured active material allowing high accessibility to electrons and ions. The mass, charge, and mass balance between the anode and cathode are other hurdles in fabricating asymmetric supercapacitors due to the large specific capacitance difference. Herein, we report a symmetric supercapacitor based on hierarchical interconnected iron oxide on three-dimensional porous and hollow electrospun carbon nanofibers following <em>in situ</em> doping of Mn and P doping. X-ray absorption (XAS) studies revealed that the synergistic effect of Mn and P strengthens the electronic structure of Fe<sub>2</sub>O<sub>3</sub>. The introduction of Mn increases the electron density around the central metals, whereas P doping effectively strengthens chemical bonding to promote long-term chemical stability. As a result, Mn/P-Fe<sub>2</sub>O<sub>3</sub>-PCF exhibited an excellent areal specific capacitance of 2506 mF cm<sup>−2</sup>, superior rate performance, and outstanding stability. Moreover, the assembled Mn/P-Fe<sub>2</sub>O<sub>3</sub>-PCF solid-state symmetric supercapacitor device delivered a high areal energy density of 85.41 μW h cm<sup>−2</sup> at a power density of 499.96 mWcm<sup>−2</sup>. The delicate design of the binder-free nanostructures in this work suggests a new approach to inhibit growth and structure modulation for high-performance energy storage devices.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238447"},"PeriodicalIF":7.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322672","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

A review on bipolar membrane-based fuel cell fabrication processes and characterization techniques: an integrated approach 双极膜燃料电池制备工艺及表征技术综述

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-13 DOI: 10.1016/j.jpowsour.2025.238559

Kaustubh P. Kothekar , Shashikant B. Thombre , Naveen K. Shrivastava

{"title":"A review on bipolar membrane-based fuel cell fabrication processes and characterization techniques: an integrated approach","authors":"Kaustubh P. Kothekar , Shashikant B. Thombre , Naveen K. Shrivastava","doi":"10.1016/j.jpowsour.2025.238559","DOIUrl":"10.1016/j.jpowsour.2025.238559","url":null,"abstract":"<div><div>Bipolar Membrane Fuel cells (BPMFC) have emerged as an important device for reliable power generation with added advantages of water management and self-humidification. The field is actively engaged with first major study appearing in 2009 and has since developed along various themes including fabricating novel membrane electrode assemblies (MEA), potential of new fuels, bipolar membrane (BPM), ionomer and catalyst development etc. This review attempts to present these in a comprehensive and unified manner with duly highlighting critical aspects. It describes the flow of entire MEA development focusing on the intricacies and missing links present in the literature accompanied with the updated analysis of nearly all the major BPMFC configurations. After tracing the MEA and BPMFC development; various kinetics, interface design and resistance issues are dealt with in detail. Illustrative schematics, trends have been included which describe the important aspects of BPMFC nature, design, operation and model-based behaviour. Separate section on durability/stability containing cruciality of non-PGM based novel catalysts is included. The novel feature is the establishment of the interrelationships, through dependency charts, among varied and numerous issues. Detailed evaluation of the state of research is carried out to gain understanding of key themes for future research in the field.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238559"},"PeriodicalIF":7.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322662","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

Morphology effects on LiMn0.6Fe0.4PO4 cathode for lithium-ion batteries with high energy density 高能量密度锂离子电池正极LiMn0.6Fe0.4PO4的形貌影响

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-13 DOI: 10.1016/j.jpowsour.2025.238593

Junjie Chen , Hui Liu , Yihuan Wang , He Yang , Shijie Li , Xuanyi Yuan , Yongjie Zhao

引用次数: 0

Investigating the effect of binder for stabilizing a sulfurized polyacrylonitrile cathode in sodium–sulfur batteries 研究了粘结剂对钠硫电池硫化聚丙烯腈阴极的稳定作用

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-13 DOI: 10.1016/j.jpowsour.2025.238587

Hyeona Park , Changki Jeon , Shivam Kansara , Chaiwon Lee , Shizhao Xiong , Zhaowei Sun , Jang-Yeon Hwang

{"title":"Investigating the effect of binder for stabilizing a sulfurized polyacrylonitrile cathode in sodium–sulfur batteries","authors":"Hyeona Park , Changki Jeon , Shivam Kansara , Chaiwon Lee , Shizhao Xiong , Zhaowei Sun , Jang-Yeon Hwang","doi":"10.1016/j.jpowsour.2025.238587","DOIUrl":"10.1016/j.jpowsour.2025.238587","url":null,"abstract":"<div><div>Replacing elemental sulfur to sulfurized polyacrylonitrile (SPAN) as cathode is an effective strategy to alleviate the “shuttle effect”, a problem in sodium-sulfur (Na-S) batteries because sulfur atoms are covalently bonded to a conductive carbon backbone in SPAN, eliminating the dissolution of Na-polysulfides in the electrolyte solution during cycling. Nevertheless, the use of SPAN cathode with a conventional poly(vinylidene fluoride) (PVdF) binder in Na-S batteries suffers from mechanical deformation due to weak adhesion strength and environmental concerns (the use of polyfluoroalkyl substance and N–Methyl–2–Pyrrolidone solvent). To replace PVdF binder, herein, poly(acrylic acid) (PAA) and sodium alginate (Na–Alg.) are introduced as water–soluble eco–friendly binders with strong adhesive strength and systematically evaluated for their physicochemical and electrochemical compatibility with the SPAN cathode in Na–S batteries. Compared to PVdF and Na–Alg. binders, the strong interaction between the carboxyl functional group (–COOH) in PAA and the polar C=N bonds in SPAN facilitates the uniform stress distribution and enhances the structural integrity of the SPAN cathode. As a result, Na–S batteries using the SPAN cathode and PAA binder achieved the high capacity of 2.6 mAh cm<sup>−2</sup> with a long lifespan over 200 cycles at 0.5C.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238587"},"PeriodicalIF":7.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324023","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

Experimental and numerical investigation of phase change material filled mini cavity cooling for thermal management of high capacity lithium ion pouch cell 相变材料填充微腔冷却高容量锂离子袋状电池热管理的实验与数值研究

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-13 DOI: 10.1016/j.jpowsour.2025.238553

Indra Kumar Lokhande, Nishant Tiwari

{"title":"Experimental and numerical investigation of phase change material filled mini cavity cooling for thermal management of high capacity lithium ion pouch cell","authors":"Indra Kumar Lokhande, Nishant Tiwari","doi":"10.1016/j.jpowsour.2025.238553","DOIUrl":"10.1016/j.jpowsour.2025.238553","url":null,"abstract":"<div><div>High capacity batteries are gaining attention for their ability to store more energy and simplify electric vehicle pack design by reducing the number of cells but generate significant heat at high charging/discharging rates. This experimental and numerical study proposes a novel aluminum plate cooling system with mini-cavities filled with different phase change materials to improve lithium-ion cell safety and reliability while minimizing weight and operational costs. A three-dimensional numerical model has been developed using ANSYS Fluent to validate the numerical model against experimental results. Three cooling techniques are investigated: natural air convection cooling, Phase Change Material (PCM) block cooling, and a Phase Change Material filled mini-cavity cooling plate, with their thermal performances compared. During experiments, the melting behavior of organic material PCMs (OM-37, OM-42, and OM-46) is observed for both PCM block cooling and PCM-filled mini-cavity cooling at high charging rates. In the PCM block cooling case, uneven melting occurs, whereas in the PCM mini-cavity cooling system, uniform heat conduction through the aluminum plate ensures even PCM melting. The PCM mini-cavity cooling system improved pouch cell performance by 8.15 %, 7.24 %, and 5.34 % with OM-37, OM-42, and OM-46 at 3C charging. The segmented PCM mini-cavity, using OM-37 and OM-42 distributed along thermal gradients, kept cell temperature below 52 °C and ensured sequential melting with superior thermal uniformity compared to bulk PCM blocks. Pouch cell cycle analysis shows that natural convection led to swelling, while PCM mini-cavity cooling maintained structural integrity and stable temperatures. Overall, PCM mini-cavity cooling enhances battery safety, performance, and thermal stability.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238553"},"PeriodicalIF":7.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323289","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

Suppression of electrode swelling of SiOx nanoflake anode using LiFSI/glyme localized high-concentration electrolytes 用LiFSI/glyme局部化高浓度电解质抑制SiOx纳米片阳极电极膨胀

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-12 DOI: 10.1016/j.jpowsour.2025.238599

Mai Nakanishi, Moe Yasuhara, Kaho Tsutsui, Takayuki Doi, Minoru Inaba

{"title":"Suppression of electrode swelling of SiOx nanoflake anode using LiFSI/glyme localized high-concentration electrolytes","authors":"Mai Nakanishi, Moe Yasuhara, Kaho Tsutsui, Takayuki Doi, Minoru Inaba","doi":"10.1016/j.jpowsour.2025.238599","DOIUrl":"10.1016/j.jpowsour.2025.238599","url":null,"abstract":"<div><div>Charge and discharge characteristics and electrode swelling of SiO<sub><em>x</em></sub> nanoflake anode (O/Si = 0.68) are investigated in various LiFSI/glyme-based high-concentration electrolytes (HCEs) and localized HCEs (LHCEs). The SiO<sub><em>x</em></sub> anode shows a high capacity of ca. 1350 mAh g<sup>−1</sup> with good cycleability for 1000 cycles in LiFSI/DME, diglyme (G2), triglyme, and tetraglyme HCEs, and LiFSI/G2-based LHCEs using fluorinated diluents (1:1 by volume) without any film-forming additives. Raman spectra of these electrolytes show that FSI<sup>−</sup> anions are predominantly in the form of aggregates (AGGs) in all the LHCEs. SiO<sub><em>x</em></sub> anode shows good cycleability in LiFSI/G2+1H,1H,5H-perfluoropentyl l,1,2,2-tetrafluoroethyl ether (OTE) LHCEs of different fractions (1:1) to (1:6). However, remarkable differences in rate-capability are observed, and the LHCE (1:4) shows the best rate-capability. SEM observation of the anode cross-sections after cycling reveals that electrode swelling in LiFSI/G2 HCE and LiFSI/G2+OTE (1:4) are x 1.7 and x 1.8, respectively, after 300 cycles, which are much thinner than that after 100 cycles in a conventional electrolyte (x 3.7). These facts prove that increasing the stability of the electrolyte solution against reduction is effective for suppressing the electrode swelling of SiO<sub><em>x</em></sub> anode, and that the LiFSI/G2+OTE (1:4) LHCE is promising for LIBs using Si-based anodes.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238599"},"PeriodicalIF":7.9,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324025","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

Functional Co2SiO4-coated nano-silicon anodes with synergistic buffering and catalytic effects for high-performance lithium-ion batteries 具有协同缓冲和催化作用的co2sio4包覆纳米硅阳极用于高性能锂离子电池

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-11 DOI: 10.1016/j.jpowsour.2025.238589

Liwei Su , Shihao Guo , Junjie Wang , Hao Wang , Shixiong Wu , Hao Wu , Lianbang Wang

{"title":"Functional Co2SiO4-coated nano-silicon anodes with synergistic buffering and catalytic effects for high-performance lithium-ion batteries","authors":"Liwei Su , Shihao Guo , Junjie Wang , Hao Wang , Shixiong Wu , Hao Wu , Lianbang Wang","doi":"10.1016/j.jpowsour.2025.238589","DOIUrl":"10.1016/j.jpowsour.2025.238589","url":null,"abstract":"<div><div>Silicon-based materials are considered promising next-generation anode candidates for lithium-ion batteries due to their high theoretical capacity and natural abundance. However, severe volume expansion (∼300 %) during cycling and intrinsically low electrical conductivity significantly hinder their practical applications. Surface coating modification has been recognized as an effective strategy for silicon-based materials. However, common coating materials, such as C and metal oxides, are limited by weak interfacial bonding, insufficient stress buffering, and cracking of the coating layer, making it challenging to construct uniform, durable, and multifunctional shells. This work constructs a double core-shell structured nanocomposite, Si@Co<sub>2</sub>SiO<sub>4</sub>@C. The composite leverages the buffering and conductive properties of the double shells, as well as the catalytic effect of newly generated Co<sup>0</sup>, to facilitate reversible lithiation of the Li-Si-O compounds, thereby achieving high capacity and long-term cycling stability. As a result, the composite delivers a reversible capacity of 1296 mA h g<sup>−1</sup> after 200 cycles at a current density of 300 mA g<sup>−1</sup>. The role of the double-shell structure is investigated through electrochemical measurements and structure characterization. This double core-shell structure, utilizing a transition metal silicate intermediate layer, provides a novel approach to developing high-performance Si-based anodes with distinct advantages for balancing high capacity and structural stability.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238589"},"PeriodicalIF":7.9,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263705","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

1,000-hour life testing of 10-cell planar solid oxide electrolysis cell stacks at 650 °C: Effects of bipolar plate coatings on degradation suppression 650℃下10电池平面固体氧化物电解电池堆1000小时寿命试验：双极板涂层对降解抑制的影响

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-11 DOI: 10.1016/j.jpowsour.2025.238576

Deok-Gi Hong , Hunmin Park , Yoonseok Choi , Seul Hee Lee , Hyo Jung Hwang , Sangbaek Park , Sun-Dong Kim

{"title":"1,000-hour life testing of 10-cell planar solid oxide electrolysis cell stacks at 650 °C: Effects of bipolar plate coatings on degradation suppression","authors":"Deok-Gi Hong , Hunmin Park , Yoonseok Choi , Seul Hee Lee , Hyo Jung Hwang , Sangbaek Park , Sun-Dong Kim","doi":"10.1016/j.jpowsour.2025.238576","DOIUrl":"10.1016/j.jpowsour.2025.238576","url":null,"abstract":"<div><div>Corrosion of ferritic stainless steel bipolar plates in solid oxide electrolysis cells (SOECs) causes Cr volatilization and interfacial degradation, compromising long-term durability. In this study, Co-rich electroplated coatings were applied to both the air- and fuel-electrode sides of the bipolar plates, and their corrosion-mitigation performance was evaluated using a 10-cell SOEC stack. The final coating was Co-rich with minimal Ni content (∼3 wt%). After 1000 h at 650 °C, coated regions formed maintained structural integrity: compact Co<sub>3</sub>O<sub>4</sub> spinel on the air side and metallic Co on the fuel side. These layers effectively suppressed Cr poisoning and preserved interfacial integrity under both atmospheres. Uncoated plates developed porous, unstable Cr–Mn protective layer, resulting in SrCrO<sub>4</sub> formation on the air electrode and steam-induced corrosion on the fuel side, accelerating cell degradation. Cells near coated plates showed minimal voltage degradation (−10 mV/kh) versus rapid degradation (390 mV/kh) near uncoated plates. While intermediate-temperature operation can suppress electrode chemical degradation, it cannot prevent fuel-side metal corrosion under humid conditions. These findings highlight the critical importance of Cr-blocking coatings, particularly on the fuel side, for mitigating corrosion-induced degradation and enhancing SOEC stack longevity.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238576"},"PeriodicalIF":7.9,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265078","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

Anchoring of alkali-activated surface reactive groups: Dual-groups modified K+&Na+- intercalated C3N5 for enhanced photocatalytic H2O2 production 碱活化表面反应基团的锚定：双基团修饰的K+&Na+插层C3N5增强光催化H2O2生成

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-11 DOI: 10.1016/j.jpowsour.2025.238511

Yongyi Li, Wei Li, Zhigang Shao, Huiyang Xu, Shuanglong Li, Bo Wang, Xiaorui Huang, Shichao Jiao, Zhiwei Li

{"title":"Anchoring of alkali-activated surface reactive groups: Dual-groups modified K+&Na+- intercalated C3N5 for enhanced photocatalytic H2O2 production","authors":"Yongyi Li, Wei Li, Zhigang Shao, Huiyang Xu, Shuanglong Li, Bo Wang, Xiaorui Huang, Shichao Jiao, Zhiwei Li","doi":"10.1016/j.jpowsour.2025.238511","DOIUrl":"10.1016/j.jpowsour.2025.238511","url":null,"abstract":"<div><div>Photocatalytic production of hydrogen peroxide from water is regarded as an environmentally benign technology for energy storage and supply. Herein, a disordered K&Na-C<sub>3</sub>N<sub>5</sub> photocatalyst co-intercalated with K<sup>+</sup>&Na<sup>+</sup> and modified by cyano/hydroxyl groups is successfully fabricated via alkali-activated thermal-polymerization. Alkali activation effectively anchors cyano and hydroxyl active groups on the surface: hydroxyl groups enhance the material's hydrophilicity and promote proton transfer, while cyano groups exhibit electron-attracting characteristics to localize photogenerated electrons. Simultaneously, interlayer intercalation of K<sup>+</sup>&Na<sup>+</sup> forms electron transport channels, synergistically facilitating surface proton transfer and optimizing charge distribution. This multi-component modification strategy significantly enhances the adsorption capacity of O<sub>2</sub>, effectively modulates the 2e<sup>−</sup>ORR pathway, and improves the selectivity of H<sub>2</sub>O<sub>2</sub>, demonstrating its excellent bifunctional properties. Experimental data show that the optimally alkali-activated K<sub>3</sub>&Na<sub>3</sub>-C<sub>3</sub>N<sub>5</sub> achieves a remarkably high H<sub>2</sub>O<sub>2</sub> production rate of 26,920.49 μmol g<sup>−1</sup>·h<sup>−1</sup>— a 90.3-fold increase over unmodified C<sub>3</sub>N<sub>5</sub>. This work pioneers alkali activation as a universal and scalable paradigm for engineering surface-active sites to enable performance amplification through functional group-metal ion cooperativity, and it provides a design blueprint for advanced carbon nitride-based photocatalysts to boost H<sub>2</sub>O<sub>2</sub> fuel cell performance.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238511"},"PeriodicalIF":7.9,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264156","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