Journal of Power Sources最新文献

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Cation-doping modulated phase-transition mechanism and structural stability of layered nickel/manganese oxide cathode for enhanced electrochemical capability 增强电化学性能的层状镍/锰氧化物阴极的阳离子掺杂调制相变机理和结构稳定性
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-16 DOI: 10.1016/j.jpowsour.2025.238610
Haiwen Zhang , Yangyang Zhang , Jiayu Li, Keying Di, Xingde Xiang
{"title":"Cation-doping modulated phase-transition mechanism and structural stability of layered nickel/manganese oxide cathode for enhanced electrochemical capability","authors":"Haiwen Zhang ,&nbsp;Yangyang Zhang ,&nbsp;Jiayu Li,&nbsp;Keying Di,&nbsp;Xingde Xiang","doi":"10.1016/j.jpowsour.2025.238610","DOIUrl":"10.1016/j.jpowsour.2025.238610","url":null,"abstract":"<div><div>Layered nickel/manganese oxides have garnered considerable attention as a high-capacity cathode material for rechargeable sodium-ion batteries, but being challenged by complex phase transitions and poor cycling performance. A novel layered oxide with suppression of phase transitions is designed by doping Ti and Al atoms into NaNi<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> lattice as a highly stable cathode material. Structural and electrochemical evolutions of the material are investigated with X-ray diffraction, X-ray photoelectron spectroscopy, cyclic voltammetry, and galvanostatic measurements. As revealed, it mainly undergoes a single-phase evolution with lattice distortion of O3 phase at a low-potential plateau region and a two-phase reaction process with coexistence of O3 and P3 phases at a long potential slope region. The reversible O3/P3 coexistence-dominated phase-transition mechanism enables the material having fast sodium-diffusion ability and good structural stability, thus leading to superior high-rate capability (135.2 mA h g<sup>−1</sup> at 10 mA g<sup>−1</sup> and 73.4 mA h g<sup>−1</sup> at 1000 mA g<sup>−1</sup>) and enhanced cycling performance (92.3 % retention after 100 cycles at 100 mA g<sup>−1</sup>). The origin of the improved performance is understood based on the analysis of in-situ dQ/dV curves and ex-situ X-ray diffraction. The finding suggests the feasibility of cation doping in modulating structural evolution and electrochemical reversibility of layered oxides.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238610"},"PeriodicalIF":7.9,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324021","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
Cerium in-plane transport in PEM fuel cells during real-world automotive operations: experimental and dynamic modelling analysis 在现实世界的汽车操作中,质子交换膜燃料电池中的铈平面内传输:实验和动态建模分析
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238538
Francesco Verducci , Livio Cultrera , Elena Colombo , Aixeen Manuel Fontanilla , Francesco Casamichiela , Davide Mazzucconi , Andrea Pola , Andrea Casalegno , Andrea Baricci
{"title":"Cerium in-plane transport in PEM fuel cells during real-world automotive operations: experimental and dynamic modelling analysis","authors":"Francesco Verducci ,&nbsp;Livio Cultrera ,&nbsp;Elena Colombo ,&nbsp;Aixeen Manuel Fontanilla ,&nbsp;Francesco Casamichiela ,&nbsp;Davide Mazzucconi ,&nbsp;Andrea Pola ,&nbsp;Andrea Casalegno ,&nbsp;Andrea Baricci","doi":"10.1016/j.jpowsour.2025.238538","DOIUrl":"10.1016/j.jpowsour.2025.238538","url":null,"abstract":"<div><div>Cerium is an additive adopted in polymer electrolyte membrane fuel cells to extend membrane lifetime, but its mobility remains a challenge. A cerium transport model accounting for diffusion, migration and water activity gradient is developed. Diffusion coefficient is calibrated on literature data, as the effect of Ce ion-exchange fraction on protonic conductivity and membrane water uptake; Einstein relation is used for the migration coefficient. Validation is conducted on migration profiles obtained via hydrogen pump tests, quantified through X-ray fluorescence. Trends under different temperatures, relative humidities and initial cerium contents are reproduced. Tailored tests investigate how the water activity gradient affects Ce transport. Furthermore, a 1+1D fuel cell performance model is exploited to determine the initial and time-integral mean values of the operating variables that characterize the current steps of a dynamic load cycle, then provided to the Ce transport model. The experimentally measured planar radical scavenger redistributions, after hundreds of hours of single-cell automotive-representative operations, are predicted from air-inlet to outlet. Cerium accumulates towards air-inlet and depletes at middle/outlet; the modelling analysis identifies the building-up in the region of lowest ionic potential and water content. Succeeding in predictions, this model can support the development of strategies to improve durability.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238538"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145326291","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
Hierarchical porous carbon from waste tire pyrolysis carbon black via in-situ SiO2 templating for high-performance supercapacitors 从废轮胎热解炭黑中提取分级多孔炭,通过原位SiO2模板制备高性能超级电容器
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238603
Jun Yin , Yani Guo , Kaixi Yan , Yanzhi Sun , Yongmei Chen , Junqing Pan
{"title":"Hierarchical porous carbon from waste tire pyrolysis carbon black via in-situ SiO2 templating for high-performance supercapacitors","authors":"Jun Yin ,&nbsp;Yani Guo ,&nbsp;Kaixi Yan ,&nbsp;Yanzhi Sun ,&nbsp;Yongmei Chen ,&nbsp;Junqing Pan","doi":"10.1016/j.jpowsour.2025.238603","DOIUrl":"10.1016/j.jpowsour.2025.238603","url":null,"abstract":"<div><div>Realizing high-value recycling of pyrolysis carbon black (CBp) is essential to promoting the sustainable development of the waste tire pyrolysis industry. However, the high-end applications of CBp are restricted by its high ash content, small specific surface area and poor electrical conductivity. Herein, waste tire-derived CBp were successfully converted to hierarchical porous activated carbon (ACBp1) for high-performance supercapacitors by one-step acid purification coupled with in-situ SiO<sub>2</sub> template activation. This method not only greatly reduces the ash content by avoiding use of environmentally-hazardous hydrofluoric acid, but also is beneficial to forming a rich interconnected pore structure to increase the ion and electron migration rate. ACBp1 achieves a specific capacitance of 246 F g<sup>−1</sup> at current density of 1 A g<sup>−1</sup>, while maintaining 95 % of initial capacitance after 100,000 charge-discharge cycles at 100 A g<sup>−1</sup>. The ACBp1-based zinc ion hybrid supercapacitor demonstrates a high specific capacity of 66 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup>. This study provides a new idea to improve the utilization efficiency of CBp and offers a new way to further develop cheap and sustainable energy storage materials.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238603"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322667","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
Advanced modification strategies for improving the thermal stability of Ni-rich layered cathodes towards next-generation lithium-ion batteries 新一代锂离子电池用富镍层状阴极热稳定性的改进策略
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238606
Mingyuan Zhang , Kai Chen , Wenfeng Li , Shaobai Li , Chaoyue Wang , Zhijia Sun , Xiaoman Cao , Hao Ge
{"title":"Advanced modification strategies for improving the thermal stability of Ni-rich layered cathodes towards next-generation lithium-ion batteries","authors":"Mingyuan Zhang ,&nbsp;Kai Chen ,&nbsp;Wenfeng Li ,&nbsp;Shaobai Li ,&nbsp;Chaoyue Wang ,&nbsp;Zhijia Sun ,&nbsp;Xiaoman Cao ,&nbsp;Hao Ge","doi":"10.1016/j.jpowsour.2025.238606","DOIUrl":"10.1016/j.jpowsour.2025.238606","url":null,"abstract":"<div><div>Driven by the ever-growing demand for the explosive growth of electric devices, Ni-rich layered cathodes (NRLCs) have attracted extensive interest due to their superior reversible capacity and relatively low cost. However, the inferior thermal stability of NRLCs severely affects their large-scale application. Thermal runaway (TR) is a critical safety issue that impedes the further commercialization of high-energy lithium-ion batteries (LIBs). Therefore, understanding the thermal stability of NRLCs is of great significance for rational design and improvement of high-energy cathodes towards safer next-generation LIBs. Herein, advanced design strategies for boosting the thermal stability of NRLCs are reviewed in detail, including elemental doping, surface coating, concentration-gradient structure, single-crystal technology, microstructure engineering, and synergistic modification. Finally, conclusions and the major challenges and prospects worth exploring for further enhancing the thermal stability of NRLCs are proposed. Notably, synergistic modification strategies integrating high-entropy doping with surface coating in single-crystal NRLCs are effective approaches to significantly enhance the thermal stability, and the corresponding synergistic mechanisms remain to be urgently probed. The purpose of this review is to inspire further research into the safety of NRLCs featuring higher energy density, generating attention from both academia and industry to accelerate the commercialization of NRLCs and advance the sustainable development of high-energy LIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238606"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324024","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
Influence of different exo-electrogens as biocatalyst on the bio-electrochemical behavior of H-type microbial fuel cell 不同外源电作为生物催化剂对h型微生物燃料电池生物电化学行为的影响
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238571
Sangita Karmakar , Ravindra K. Gautam , Radha Rani
{"title":"Influence of different exo-electrogens as biocatalyst on the bio-electrochemical behavior of H-type microbial fuel cell","authors":"Sangita Karmakar ,&nbsp;Ravindra K. Gautam ,&nbsp;Radha Rani","doi":"10.1016/j.jpowsour.2025.238571","DOIUrl":"10.1016/j.jpowsour.2025.238571","url":null,"abstract":"<div><div>Being the source of electrons, microbes are the key players in MFCs; thus, it is imperative to investigate their effect on the bio-electrochemical processes therein so as to develop efficient systems with high power outputs. This study investigates the influence of four different anodic microbial cultures, <em>Pseudomonas gessardii</em> PG<em>, Pseudomonas aeruginosa</em> PA, <em>Shewanella putrefaciens</em> SP, and cowdung CD enriched inoculum, on the electrochemical performance of H-type MFC. Out of the four biocatalysts studied, most efficient electron transfer was observed in the case of PG, as indicated by the highest anodic peak current (0.717 mA) obtained by cyclic voltammograms and minimum internal resistance. Also, PG showed highest open circuit potential (OCP) and power density 504 mV and 1.05 W m<sup>−2</sup> respectively, followed by SP (280 mV, 0.56 W m<sup>−2</sup>), CD (227 mV, 0.192 W m<sup>−2</sup>) and PA (190 mV, 0.168 W m<sup>−2</sup>). High catabolic potential, active biofilm formation, and low corrosion rate were also identified as important reasons for better electrochemical performance observed in PG. Furthermore, SEM analysis of anodic biofilms revealed clusters of microbial cells attached to carbon cloth fibers (anode), while HR-TEM and epifluorescence images indicate the presence of elongated nanowires-like extensions in the cultures, which are supposedly involved in intercellular transport of electrons.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238571"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322664","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
Unveiling the potential of Mo2C and Mo2CO2 MXenes for Na-ion batteries: An ab initio study 揭示Mo2C和Mo2CO2 MXenes用于钠离子电池的潜力:从头开始研究
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238592
Satchakorn Khammuang , Thanayut Kaewmaraya , Tanveer Hussain , Komsilp Kotmool
{"title":"Unveiling the potential of Mo2C and Mo2CO2 MXenes for Na-ion batteries: An ab initio study","authors":"Satchakorn Khammuang ,&nbsp;Thanayut Kaewmaraya ,&nbsp;Tanveer Hussain ,&nbsp;Komsilp Kotmool","doi":"10.1016/j.jpowsour.2025.238592","DOIUrl":"10.1016/j.jpowsour.2025.238592","url":null,"abstract":"<div><div>This study employs density functional theory (DFT) calculations to investigate the potential of Mo<sub>2</sub>C and Mo<sub>2</sub>CO<sub>2</sub> MXenes as promising anode material candidates for Na-ion batteries under varying biaxial strains. The findings indicate that O-termination significantly enhances the Na adsorption energy compared to bare Mo<sub>2</sub>C, due to a stronger O-Na interaction. Under compressive strain, the diffusion energy barrier decreases while it increases under tensile strain for both forms of Mo<sub>2</sub>C-based MXenes. <em>Ab initio</em> molecular dynamics (AIMD) simulations at 300 K, which verify the thermal stabilities of both calculated MXenes, suggest their maximum theoretical capacities at operational temperatures, calculated to be 131.43 mAh/g for Mo<sub>2</sub>C and 227.21 mAh/g for Mo<sub>2</sub>CO<sub>2</sub>. The open-circuit voltages (OCV) calculated from DFT total energies for the Na loadings retained after AIMD. The OVC is in the optimal range of 0–1.0 V, which helps prevent dendrite formation. The OCV values of 0.47 V for Mo<sub>2</sub>C and 0.65 V for Mo<sub>2</sub>CO<sub>2</sub> highlight their suitability as anodes. These results show that Mo<sub>2</sub>C and Mo<sub>2</sub>CO<sub>2</sub> have low energy barriers, high structural stability, and low OCV values, making them promising candidates for Na-ion battery anodes with properties that can be adjusted through biaxial strain modifications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238592"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323287","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 durability of Raney-Ni-based electrodes for hydrogen evolution reaction in alkaline water electrolysis: Mitigating reverse current and H2 bubble effects using a NiP protective layer 提高碱水电解析氢反应中raney - ni基电极的耐久性:使用NiP保护层减轻逆流和H2泡效应
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238580
Hyebin Son , Hyunjoon Lee , Jinwoo Lee , Taeyang Han , Heonjoong Lee , Chu-Sik Park , Kwangjin Jung , Joonho Kim , Hyun Wook Jung , Kyoung-Soo Kang
{"title":"Enhancing durability of Raney-Ni-based electrodes for hydrogen evolution reaction in alkaline water electrolysis: Mitigating reverse current and H2 bubble effects using a NiP protective layer","authors":"Hyebin Son ,&nbsp;Hyunjoon Lee ,&nbsp;Jinwoo Lee ,&nbsp;Taeyang Han ,&nbsp;Heonjoong Lee ,&nbsp;Chu-Sik Park ,&nbsp;Kwangjin Jung ,&nbsp;Joonho Kim ,&nbsp;Hyun Wook Jung ,&nbsp;Kyoung-Soo Kang","doi":"10.1016/j.jpowsour.2025.238580","DOIUrl":"10.1016/j.jpowsour.2025.238580","url":null,"abstract":"<div><div>Raney Ni (R-Ni) electrodes are used as hydrogen evolution reaction catalysts in alkaline water electrolysis (AWE). However, they are not durable because of reverse current-induced oxidation and catalyst damage from H<sub>2</sub> bubbles. Reverse current triggers Ni phase changes and mechanical stress, leading to catalyst delamination, while bubbles block active sites, increase resistance, and cause structural damage. These issues have been addressed individually but not simultaneously. In this study, a P-doped Ni (NiP) protective layer is electroplated on the R-Ni electrode to overcome both challenges. The NiP protective layer inhibits oxidation, reducing Ni phase changes and preventing catalyst delamination. Enhanced surface wettability minimizes nucleation and facilitates faster bubble detachment, reducing bubble-related damage. Electrochemical tests reveal that NiP/R-Ni exhibits a 26 mV lower overpotential than that of R-Ni at −400 mA cm<sup>−2</sup>, indicating higher catalytic activity. Accelerated degradation tests (ADTs) demonstrate the retention of the NiP/R-Ni catalyst layer, with only a 25 mV increase in overpotential after ADT, which is significantly less than that of R-Ni. Real-time impedance analysis reveals the presence of small, rapidly detaching bubbles on NiP/R-Ni. Overall, the NiP protective layer on R-Ni simultaneously mitigates both reverse current and H<sub>2</sub> bubble-induced degradation, improving catalytic activity and durability during AWE.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238580"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322666","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
Quantifying energy dissipations and their impact on the energy efficiency of lithium-ion batteries 量化能量耗散及其对锂离子电池能效的影响
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238596
Adekanmi Miracle Adeyinka, Xiaoniu Du, Song-Yul Choe
{"title":"Quantifying energy dissipations and their impact on the energy efficiency of lithium-ion batteries","authors":"Adekanmi Miracle Adeyinka,&nbsp;Xiaoniu Du,&nbsp;Song-Yul Choe","doi":"10.1016/j.jpowsour.2025.238596","DOIUrl":"10.1016/j.jpowsour.2025.238596","url":null,"abstract":"<div><div>Energy dissipation in lithium-ion batteries is a key indicator for evaluating and optimizing energy efficiency under various operating conditions. We proposed a theoretical hypothesis linking energy dissipation to energy efficiency and validated it using different cell chemistries and formats. Thermal characterization was performed using a custom-designed multifunctional isothermal calorimeter, and a thermal model including irreversible and reversible heat source terms was incorporated into a reduced-order electrochemical model (ROM). The model was validated using experimentally measured heat generation rate (HGR) data from charge–discharge cycles under different operating conditions. Results reveal that contact resistance dominates energy dissipation, accounting for 52–56 % of total energy dissipated. Silicon-containing anodes have higher activation losses than pure Graphite anodes due to stress-induced overpotential from Silicon volume expansion during cycling. High C-rates increase energy dissipation due to kinetic limitations, while high temperatures improve ionic conductivity and reduce charge transfer kinetics. Aging studies revealed significant increase in energy dissipation from beginning-of-life (BoL) to end-of-life (EoL), attributed to solid-electrolyte interphase (SEI) layer growth and degradation mechanisms. Cylindrical cells have higher volumetric HGR than pouch cells due to smaller surface-area-to-volume ratios. Finally, energy efficiency maps were developed as functions of state-of-charge (SOC) and C-rate, offering insights for optimizing cell operations and thermal management strategies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238596"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322670","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
Influence of iron doping on α-NaMnO2 lattice symmetry: Insight from operando X-ray absorption, ex-situ structural analysis, and electrochemical performance using chestnut shell-derived hard carbon 铁掺杂对α-NaMnO2晶格对称性的影响:来自栗子壳衍生硬碳的operando x射线吸收、非原位结构分析和电化学性能的见解
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238602
Ebru Dogan , Abdulhadi Maiga , Rawdah Whba , Messaoud Harfouche , Zeynep Reyhan Ozturk , Ahlam Farhan , Emine Altin , Özgür Duygulu , Semran Ipek , Rukiyye Kartal , Mesut Karta , Tolga Depçi , Mehmet Nurullah Ates , Sevda Sahinbay , Serdar Altin
{"title":"Influence of iron doping on α-NaMnO2 lattice symmetry: Insight from operando X-ray absorption, ex-situ structural analysis, and electrochemical performance using chestnut shell-derived hard carbon","authors":"Ebru Dogan ,&nbsp;Abdulhadi Maiga ,&nbsp;Rawdah Whba ,&nbsp;Messaoud Harfouche ,&nbsp;Zeynep Reyhan Ozturk ,&nbsp;Ahlam Farhan ,&nbsp;Emine Altin ,&nbsp;Özgür Duygulu ,&nbsp;Semran Ipek ,&nbsp;Rukiyye Kartal ,&nbsp;Mesut Karta ,&nbsp;Tolga Depçi ,&nbsp;Mehmet Nurullah Ates ,&nbsp;Sevda Sahinbay ,&nbsp;Serdar Altin","doi":"10.1016/j.jpowsour.2025.238602","DOIUrl":"10.1016/j.jpowsour.2025.238602","url":null,"abstract":"<div><div>The structural instability and moderate electrochemical performance of NaMnO<sub>2</sub> cathodes limit the use of sodium-ion batteries (SIBs). This limitation is primarily due to lattice distortions and valence variations that occur during the cycling process. To address this limitation, NaMn<sub>1-<em>x</em></sub>Fe<sub><em>x</em></sub>O<sub>2</sub> (0.00 ≤ <em>x</em> ≤ 0.50) powders were synthesized using a conventional solid-state method. Their structural and electrochemical properties were systematically investigated through a combination of structural characterization, in situ X-ray absorption spectroscopy, and computational modeling. X-ray diffraction and Rietveld refinement reveal a contraction of the <em>β</em>-angle from 112° to 105°, indicative of a phase transition from <em>α</em> to <em>α</em>′, with the <em>x</em> = 0.5 composition stabilizing as a single-phase <em>α</em>′ structure. Fe incorporation reduces the average Mn valence from 3.23+ to 3.18+, thereby enhancing structural stability, as corroborated by electron diffraction and density functional theory (DFT) calculations. At the same time, hard carbon (HC) derived from chestnut shells was developed as a sustainable anode material, exhibiting a disordered framework favorable for Na <sup>+</sup> storage. Electrochemical evaluation demonstrates that the <em>x</em> = 0.5 cathode delivers an initial half-cell capacity of 130.2 mAh/g, which declines to 77.1 mAh/g upon cycling. In contrast, the optimized electrode configuration affords improved stability. The HC anode attains a high reversible capacity of 317.3 mAh/g. Full-cell assemblies incorporating pre-sodiated HC anodes exhibit promising performance, underscoring the potential of this dual-material approach for developing high-performance, sustainable SIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"661 ","pages":"Article 238602"},"PeriodicalIF":7.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323291","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-performance hybrid anodes based on nitrogen-doped porous carbon and SiOC nanoparticles for lithium-ion batteries 基于氮掺杂多孔碳和二氧化硅纳米颗粒的锂离子电池高性能杂化阳极
IF 7.9 2区 工程技术
Journal of Power Sources Pub Date : 2025-10-15 DOI: 10.1016/j.jpowsour.2025.238604
Gholam Reza Allahgholipour, Amir Abbas Rafati
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