Journal of Power Sources最新文献_第9页

Design and synthesis of nickel-cobalt-aluminum hydroxide battery electrode materials for high-performance hybrid supercapacitors

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236370

Shuai Zhang , Ying Zhao , Shuaishuai Gao , Chunyang Liu , Xuebo Chen

{"title":"Design and synthesis of nickel-cobalt-aluminum hydroxide battery electrode materials for high-performance hybrid supercapacitors","authors":"Shuai Zhang , Ying Zhao , Shuaishuai Gao , Chunyang Liu , Xuebo Chen","doi":"10.1016/j.jpowsour.2025.236370","DOIUrl":"10.1016/j.jpowsour.2025.236370","url":null,"abstract":"<div><div>Layered spherical structures for electrode materials of supercapacitors expand the specific surface area, accelerate the transport of ions and electrons, and improve the electrochemical reactivity and structural stability of the electrode materials. Meanwhile, the multi-metal compositions effectively adjust the electronic structure of electrode materials, and the synergistic and complementary effects improve the charge storage capacity of the materials, which improves the energy density and power density of the supercapacitors. Herein, we propose a simple and effective strategy for the design and synthesis of high-performance electrode materials with layered spherical structures. The optimized nickel-cobalt-aluminum hydroxide (NiCoAl-LDH) electrode materials delivers a high specific capacitance of 1680 F g<sup>−1</sup> at the current density of 1.0 A g<sup>−1</sup>. In addition, the all-solid-state hybrid supercapacitors (HSC) constructed with the NiCoAl-LDH, and active carbon achieves (AC) a high energy density of 40.0 Wh kg<sup>−1</sup> at a power density of 825.0 W kg<sup>−1</sup>, and possess an excellent long-term electrochemical cycling stability performance with a retention rate of 88.5 % after 50000 cycles.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236370"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168581","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

Low-density phenyl content π-π stacking units based ionomers and membranes to improve power density for fuel-cells

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236397

Shaoji Wang, Fan Zhang, Yang Zhang, Lulu Wang, Shuanglong Xiao, Jilin Wang

{"title":"Low-density phenyl content π-π stacking units based ionomers and membranes to improve power density for fuel-cells","authors":"Shaoji Wang, Fan Zhang, Yang Zhang, Lulu Wang, Shuanglong Xiao, Jilin Wang","doi":"10.1016/j.jpowsour.2025.236397","DOIUrl":"10.1016/j.jpowsour.2025.236397","url":null,"abstract":"<div><div>Aryl ether-free aromatic polyelectrolytes featuring π-π stacking interaction exhibit remarkable conductivity and alkaline stability. This is attributed the formation of well-ordered ion-conducting channels and the prevention of backbone cleavage. However, the π-π stacking units usually consist of multiple phenyl groups. This characteristic results in significant adsorption of phenyl groups onto hydrogen oxidation catalysts, consequently impeding the performance of fuel cell. Herein, fluoranthene units with low phenyl content are employed in aryl ether-free backbones to prepare novel π-π stacking based anion exchange membranes (AEMs) and anion exchange ionomers (AEIs). The low-density phenyl content π-π stacking units effectively construct ion transport channels and weaken the phenyl group adsorption on hydrogen oxidation catalysts. The as-prepared polyelectrolyte works as AEI and AEM achieving both outstanding conductivity (143.69 mS/cm) and single cell performance (1.527 W/cm<sup>2</sup>) at 80 °C. Furthermore, the membrane prepared in this study demonstrates outstanding mechanical strength (39.5 MPa) and alkaline stability. Specifically, it maintains 92 % of its initial conductivity after being exposed to 3 M KOH at 80 °C for 1000 h. This remarkable performance can be attributed to the rigid fluoranthene units and the aryl-ether-free backbones, which contribute to the membrane's structural integrity and resistance to degradation under alkaline conditions.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236397"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169533","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 power density and quick start-up of microbial fuel cell with 3D fold MXene Film@Nickel foam composite anode

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236405

Weiwei Li , Xiaoyu Wang , Kaiyuan Pei , Shiting Li , Tao Chen , Yi Fu , Xinnan Feng

引用次数: 0

Nanoarchitectonics of biomass-based activated biocarbon with high surface area and balanced pore structures for use as supercapacitor electrode material

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236376

Nattasak Hwangsud , Nopparat Sangtong , Kessara Seneesrisakul , Prachid Saramolee , Uthen Thubsuang

{"title":"Nanoarchitectonics of biomass-based activated biocarbon with high surface area and balanced pore structures for use as supercapacitor electrode material","authors":"Nattasak Hwangsud , Nopparat Sangtong , Kessara Seneesrisakul , Prachid Saramolee , Uthen Thubsuang","doi":"10.1016/j.jpowsour.2025.236376","DOIUrl":"10.1016/j.jpowsour.2025.236376","url":null,"abstract":"<div><div>Biocarbon and activated biocarbon samples were prepared based on rubberwood sawdust biomass. KOH, NaOH, and ZnCl<sub>2</sub> were used as activating agents, while distilled water and sulfuric acid, phosphoric acid, and thiourea solutions were used as reaction media during hydrothermal carbonization. The biocarbon hydrothermally carbonized in sulfuric acid solution, without activation, had the largest specific surface area (621 m<sup>2</sup> g<sup>−1</sup>). Hydrothermal carbonization in the phosphoric and the sulfuric acid solutions was more effective than in the thiourea solution and the distilled water in terms of specific surface area. Activation with ZnCl<sub>2</sub> and NaOH led to the dominance of mesopore characteristics, while that with KOH yielded an activated biocarbon with a balance between microporosity and mesoporosity. The cyclic voltammogram curves for the biocarbon/activated biocarbon showed EDLC behavior with some pseudo-capacitance. The activated biocarbon hydrothermally carbonized in phosphoric acid solution and activated with KOH (P-ACK) had the largest specific surface area of 2680 m<sup>2</sup> g<sup>−1</sup> with a pore volume of 1.42 cm<sup>3</sup> g<sup>−1</sup>, a specific capacitance of 482.1 F g<sup>−1</sup> at 0.5 A g<sup>−1</sup>, and outstanding capacitance retention of 103.1 % of its original value at 20,000 testing cycles.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236376"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168619","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 novel Ta/TaN/TaAlN nanocrystalline coatings on metal bipolar plates with excellent corrosion resistance

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236307

Zhenxiang Ma , Longyang Luo , Jinting Tan , Shang Li , Mu Pan

{"title":"A novel Ta/TaN/TaAlN nanocrystalline coatings on metal bipolar plates with excellent corrosion resistance","authors":"Zhenxiang Ma , Longyang Luo , Jinting Tan , Shang Li , Mu Pan","doi":"10.1016/j.jpowsour.2025.236307","DOIUrl":"10.1016/j.jpowsour.2025.236307","url":null,"abstract":"<div><div>To address the corrosion issue of metal bipolar plates in high-potential environments of proton exchange membrane fuel cells(PEMFC), this study employs magnetron sputtering to deposit a novel Ta/TaN/TaAlN nanolaminate coating on SS316L stainless steel substrates. Subsequently, a systematic investigation is conducted on the composition, morphology, electrochemical properties, and corrosion behavior of coatings with varying aluminum content. The research shows that the best TaAlN sample, doped with 14 % aluminum, exhibits a lower corrosion current density (0.159 μA/cm<sup>2</sup>), which is reduced by nearly 53 times compared to SS316L. And the coating protection efficiency reached up to 97 %. Significantly, it also exhibits the best electrical conductivity, with an interfacial contact resistance of only 6.42 mΩ/cm<sup>2</sup>, and it still meets the Department of Energy(DOE) 2025 technical specifications after corrosion. Studies on the polarized samples show that the appropriate doping of Al reduces the grain size and crystal plane distance, thereby effectively decreasing the number of columnar crystals, which prompts a significant improvement in the corrosion resistance of the coatings.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236307"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169021","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

Prussian blue analogs derived bimetallic sulfide heterostructure in dual-skeleton network of MXene and carbon enabling ultrafast K-ion storage

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236412

Zihan Wang , Yujia Ouyang , Huanyu Liang , Xinyu Wang , Yu Ma , Weiqian Tian , Jingwei Chen , Jing Shi , Minghua Huang , Huanlei Wang

{"title":"Prussian blue analogs derived bimetallic sulfide heterostructure in dual-skeleton network of MXene and carbon enabling ultrafast K-ion storage","authors":"Zihan Wang , Yujia Ouyang , Huanyu Liang , Xinyu Wang , Yu Ma , Weiqian Tian , Jingwei Chen , Jing Shi , Minghua Huang , Huanlei Wang","doi":"10.1016/j.jpowsour.2025.236412","DOIUrl":"10.1016/j.jpowsour.2025.236412","url":null,"abstract":"<div><div>Transition metal dichalcogenides (TMDs) emerge as advanced anode materials of potassium-ion batteries (PIBs), owing to the impressive capacities, strong redox reversibility, and advantageous conversion reactions with relatively weak metal-sulfur bonds. However, TMDs face inherent drawbacks that contribute to suboptimal rate performance and limited cycling stability such as low electrical conductivity, sluggish reaction kinetics, and unsatisfactory structural stability. To overcome these challenges, ultrafine heterojunction (between CoS<sub>2</sub> and FeS<sub>2</sub>) wrapped in two-dimensional transition metal carbides (MXene) and nitrogen-sulfur co-doped carbon network (MXene@CoS<sub>2</sub>/FeS<sub>2</sub>@NSC) is synthesized as anodes for PIBs. The built-in electric field generated by heterojunction and high specific surface area network of MXene and carbon both contribute to excellent electrochemical performance. Consequently, the synthesized MXene@CoS<sub>2</sub>/FeS<sub>2</sub>@NSC anode exhibits impressive reversible capacity (605/175 mA h g<sup>−1</sup> at 0.05/10 A g<sup>−1</sup>) and outstanding cycling stability (304 mA h g<sup>−1</sup> at 0.5 A g<sup>−1</sup> after 2000 cycles). The assembled potassium ion capacitors (PICs) with MXene@CoS<sub>2</sub>/FeS<sub>2</sub>@NSC anode exhibit outstanding cycling performance, maintaining nearly 100 % coulombic efficiency and over 10,000 cycles with 96 % capacity retention at 10 A g<sup>−1</sup>. This work introduces a versatile synthetic method for preparing bimetallic sulfide heterojunction, providing useful points for the further study of advanced electrode materials for PIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236412"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168608","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

Study on the formation mechanism of self-assembly bamboo-shaped carbon nanotubes enriched with highly stable Fe-N4 sites for Zn-air batteries

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236360

Lihui Xiao , Yaqiang Li , Peixia Yang , Qiang Lv , Xiangyu Lu , Hao Xu , Ruopeng Li , Huiling Zhang , Shengbo Yang , Anmin Liu , Dan Wang , Jinqiu Zhang , Maozhong An

{"title":"Study on the formation mechanism of self-assembly bamboo-shaped carbon nanotubes enriched with highly stable Fe-N4 sites for Zn-air batteries","authors":"Lihui Xiao , Yaqiang Li , Peixia Yang , Qiang Lv , Xiangyu Lu , Hao Xu , Ruopeng Li , Huiling Zhang , Shengbo Yang , Anmin Liu , Dan Wang , Jinqiu Zhang , Maozhong An","doi":"10.1016/j.jpowsour.2025.236360","DOIUrl":"10.1016/j.jpowsour.2025.236360","url":null,"abstract":"<div><div>Carbon nanotubes' (CNTs) preparation and formation mechanisms are of great interest. To improve their performance in the oxygen reduction reaction (ORR), a post-treatment to add active centers is required. This study presents a simple method using a molten-salt template to self-assemble bamboo-shaped CNTs (B-Fe-N-C) with highly stable Fe-N<sub>4</sub> (Fe-pyridinic-N<sub>4</sub>) sites. By analyzing the evolution of high-temperature materials and the intermolecular bonding process, the formation mechanism of B-Fe-N-C follows a two-dimensional material synthesis--bonding--self-assembly--growth mechanism. Impressively, B-Fe-N-C exhibits superior ORR performance (a half-wave potential of 0.868 V) and stability (only 3 mV attenuation after 10000 cycles of accelerated durability test) in alkaline medium. Density functional theory calculations demonstrate that Fe-Pyridinic-N<sub>4</sub> sites can lower the energy barrier for ORR. Furthermore, Comsol multiphysics simulations confirm the significant enhancement of oxygen mass transfer by bamboo-shaped B-Fe-N-C. Therefore, B-Fe-N-C is employed in zinc-air batteries, resulting in nice discharge performance and high peak power density.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236360"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169712","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

Exploring interface role of aromatic ligands in nonlinear evolutions of tin-based perovskites’ photoelectric and mechanical properties

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236359

Qi Yang , Xiuchen Han , Shuning Wang , Xinyue Zhang , Dongmeng Chen , Wenjing Fang , Bing Liu

{"title":"Exploring interface role of aromatic ligands in nonlinear evolutions of tin-based perovskites’ photoelectric and mechanical properties","authors":"Qi Yang , Xiuchen Han , Shuning Wang , Xinyue Zhang , Dongmeng Chen , Wenjing Fang , Bing Liu","doi":"10.1016/j.jpowsour.2025.236359","DOIUrl":"10.1016/j.jpowsour.2025.236359","url":null,"abstract":"<div><div>Ligand engineering optimizes interface adhesion and photovoltaic properties of perovskite solar cells (PSCs), enhancing stability and power conversion efficiency (PCE). However, the intricate ligand stacking and interactions lead to unpredictable properties of perovskites. We investigate the interface role of aromatic ligands under structure design strategy, introducing fluorine/sulfur (F/S) atom and alkyl chain (-C<sub>m</sub>H<sub>2m</sub>NH<sub>3</sub>), in nonlinear evolution of photoelectric and mechanical properties of green tin-based perovskite, then elucidating the origins based on micro-interaction of interface and among ligands. The results demonstrate ligands with F/S atom reduce bandgap (<em>E</em><sub>g</sub>) of perovskites (2.68 eV < F-containing 2.20 eV < S-containing 1.98 eV). As the alkyl chain length increases from C0 (m = 0) to C3 (m = 3), <em>E</em><sub>g</sub> exhibits a nonlinear downward trend, obtaining a minimum 1.67 eV on the thiophene ring (Ti) with C1 (m = 1). This nonlinear evolution is primarily attributed to size effect of ligand rather than polarity, as the thin monolayer octahedron [SnBr<sub>6</sub>] reduces long-range polarity interactions of interface. The asymmetric S atom in TiC1 is vertically positioned above [SnBr<sub>6</sub>] interface at close distance and thus generating repulsive interface interaction to compress octahedron [SnBr<sub>6</sub>], thereby minimizing <em>E</em><sub>g</sub>. Meantime, the longer flexible alkyl chain weakens degree of reducing rigidity and enhancing ductility.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236359"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169731","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

Enhancing water distribution in high-performance bipolar membrane fuel cells through optimized interface architecture

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236306

Yunfei Yang, Yunqi Li, Zhengjian Li, Xueling Yan, Haining Wang, Jin Zhang, Hanfei Xie, Shanfu Lu, Yan Xiang

{"title":"Enhancing water distribution in high-performance bipolar membrane fuel cells through optimized interface architecture","authors":"Yunfei Yang, Yunqi Li, Zhengjian Li, Xueling Yan, Haining Wang, Jin Zhang, Hanfei Xie, Shanfu Lu, Yan Xiang","doi":"10.1016/j.jpowsour.2025.236306","DOIUrl":"10.1016/j.jpowsour.2025.236306","url":null,"abstract":"<div><div>In bipolar membrane fuel cells (BPMFCs), water is an essential reactant to drive cathode half-cell reaction, making the optimization of water distribution in the cathode critical for enhancing overall performance. One promising strategy is to refine the junction interface architecture. Our research presents an innovative modification to the proton exchange membrane (PEM) and anion exchange membrane (AEM) interface microstructure, which reduces the distance for water transport to the cathode catalyst layer and maximizes the interfacial contact area. The increased interfacial contact area, with a normalized interfacial area (NIA) ranging from 1.00 to 1.65, correlates with a decrease in charge transfer impedance and a corresponding rise in oxygen reduction reaction (ORR) kinetics and peak power density. Significantly, the water distribution ratio at the cathode rose from 33.3 % in the unmodified BPMFC to 69.6 % with an NIA of 1.65. Consequently, the BPMFC with an NIA of 1.65 for the PEM|AEM interface achieved a peak power density of 1.037 W cm<sup>−2</sup>, about 80 % higher than that of the unmodified interface. These results establish a link between the PEM|AEM interface structure, water distribution, and the fuel cell output performance, highlighting the importance of interface architecture in boosting BPMFCs’ efficiency.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236306"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169732","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

Hydroelectric cell and hydrogen generation using magnesium-substituted cobalt ferrite nanomaterials

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-02-03 DOI: 10.1016/j.jpowsour.2025.236349

Shashank Bhushan Das , Anubha Rajput , Nandan Murali , Vivek Kumar , Rakesh Kumar Singh , Biswarup Chakraborty , Soutik Betal

{"title":"Hydroelectric cell and hydrogen generation using magnesium-substituted cobalt ferrite nanomaterials","authors":"Shashank Bhushan Das , Anubha Rajput , Nandan Murali , Vivek Kumar , Rakesh Kumar Singh , Biswarup Chakraborty , Soutik Betal","doi":"10.1016/j.jpowsour.2025.236349","DOIUrl":"10.1016/j.jpowsour.2025.236349","url":null,"abstract":"<div><div>Hydroelectric cell and hydrogen are among the cleanest and most crucial energy sources for worldwide energy demands. Unleashing the hidden energy stored inside the most abundant resource on our planet can revolutionize the long-term solution to the current energy crisis. This work introduces a novel technique of spinel nanomaterial assisted electricity generation by splitting water molecules at room temperature without the need of any external energy stimulus. This has been achieved by controlling the oxygen vacancies and porosity of Mg<sup>2+</sup> substituted spinel CoFe<sub>2</sub>O<sub>4</sub> nanomaterials which facilitates the chemidissociation of water molecules for charge carrier generation. Interestingly, increasing the substitution concentration of Mg<sup>2+</sup> in Co<sub>1-x</sub>Mg<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub>, also increases the porosity and oxygen vacancy of the nanomaterials and the hydroelectric cell made from Co<sub>1-x</sub>Mg<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> nanomaterial with x = 0.3 achieve maximum electrical energy generation efficiency with power density of 58.28 mW/cm<sup>3</sup>. Furthermore, the synthesized nanomaterial also shows colossal electrocatalysis capability for hydrogen generation. Co<sub>0.8</sub>Mg<sub>0.2</sub>Fe<sub>2</sub>O<sub>4</sub> nanomaterial shows the highest current density of −280 mA cm<sup>−2</sup> at the switching potential with the electrochemical hydrogen evolution with Faradaic efficiency of 93 %. This work provides an unprecedented technological breakthrough for self-sustainable energy source, lowering greenhouse gas emissions and advancing the shift to a low-carbon future.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"632 ","pages":"Article 236349"},"PeriodicalIF":8.1,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168199","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