Journal of Power Sources最新文献_第3页

Nb and O co-doping in Li10SiP2S12: A strategy to lower Li-ion migration barrier and boost electrochemical performance 铌氧共掺杂Li10SiP2S12：降低锂离子迁移势垒和提高电化学性能的策略

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-02 DOI: 10.1016/j.jpowsour.2025.238535

Peng Zhang, Pengfei Du, Qingtao Wang

{"title":"Nb and O co-doping in Li10SiP2S12: A strategy to lower Li-ion migration barrier and boost electrochemical performance","authors":"Peng Zhang, Pengfei Du, Qingtao Wang","doi":"10.1016/j.jpowsour.2025.238535","DOIUrl":"10.1016/j.jpowsour.2025.238535","url":null,"abstract":"<div><div>All-solid-state lithium batteries have garnered considerable interest owing to their ability to fundamentally and efficiently tackle the safety drawbacks of current commercial lithium-based batteries. Among the existing solid-state electrolyte systems, sulfide electrolytes stand out due to their high ionic conductivity and excellent ductility. In this study, Nb<sub>2</sub>O<sub>5</sub> doping is employed to enhance the air stability and lithium ion (Li<sup>+</sup>) transport properties of Li<sub>10</sub>SiP<sub>2</sub>S<sub>12</sub>. X-ray diffraction (XRD) analysis shows that the modified Li<sub>10</sub>SiP<sub>1.8</sub>Nb<sub>0.2</sub>S<sub>11.5</sub>O<sub>0.5</sub> (LSiPNbSO) electrolyte reduces the orthorhombic phase content of β-Li<sub>3</sub>PS<sub>4</sub>, with XRD Rietveld refinement revealing a decrease from 64.17 % to 15.25 %. Density functional theory (DFT) calculations demonstrate that Nb and O doping lowers the Li<sup>+</sup> migration energy barrier, facilitates Li<sup>+</sup> diffusion, and enhances Li-ion conductivity. The LSiPNbSO electrolyte achieves an ionic conductivity of up to 1.98 mS cm<sup>−1</sup>. Air stability tests confirm the improved moisture resistance of LSiPNbSO. The assembled lithium-symmetric battery exhibits stable cycling for 800 h at a current density of 0.1 mA cm<sup>−2</sup>, indicating that Nb and O doping enhances the stability of the electrolyte and the lithium metal anode. Additionally, all-solid-state batteries assembled with the LSiPNbSO electrolyte exhibit higher specific capacity and superior rate cycling performance.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238535"},"PeriodicalIF":7.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218517","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

An electro-thermal approach for improving safety in lithium iron phosphate batteries 提高磷酸铁锂电池安全性的电热方法

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238510

Pragya Berwal, Ayushi Mehrotra, Jack J. Yoh

{"title":"An electro-thermal approach for improving safety in lithium iron phosphate batteries","authors":"Pragya Berwal, Ayushi Mehrotra, Jack J. Yoh","doi":"10.1016/j.jpowsour.2025.238510","DOIUrl":"10.1016/j.jpowsour.2025.238510","url":null,"abstract":"<div><div>The growing shift towards clean energy has increased the demand for electric vehicles and energy storage systems powered by lithium-ion batteries (LIBs). Overheating and internal resistive heating can trigger thermal runaway (TR). This study develops an electro-thermal analysis combining impedance spectroscopy and calorimetry to predict safe LIB operating zones and prevent thermal explosion. Frequency-resolved impedance parameters, obtained via equivalent circuit fitting, are converted to Joule heating and combined with calorimetrically measured exothermic heat rates to determine total heat generation across SOC and temperature ranges. A 20 mm LIB coin cell, fabricated from electrodes of a commercial 85Ah cell, with lithium iron phosphate (LFP) cathode and silicon–carbon nanocomposite (SCN) anode was tested. Impedance analysis indicates that charge-transfer resistance dominates over ohmic resistance, and its variation with SOC (0–100 %) follows a non-monotonic trend, which directly influences the Joule heating behavior over frequency range of 0.1 Hz–100 kHz. High capacitance at SOC >75 % improves charge buffering, reducing localized heating and TR risk. Joule heating varies non-monotonically with temperature, revealing two critical temperatures and underscoring the need for careful impedance diagnostics. The proposed safety prediction model quantifies the critical heat removal required to avoid exponential thermal escalation, offering a practical tool for advanced LIB safety management.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238510"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218675","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 hierarchical channel structured separator with regulated ion transport and high thermal stability for lithium-ion batteries 一种用于锂离子电池的分层通道结构分离器，具有可调节的离子输运和高热稳定性

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238528

Dianliang Cao , Jiande Liu , Qizhong Zhang , Jiao Tang , Huijun Yao , Dequan Liu , Jie Liu , Deyan He

{"title":"A hierarchical channel structured separator with regulated ion transport and high thermal stability for lithium-ion batteries","authors":"Dianliang Cao , Jiande Liu , Qizhong Zhang , Jiao Tang , Huijun Yao , Dequan Liu , Jie Liu , Deyan He","doi":"10.1016/j.jpowsour.2025.238528","DOIUrl":"10.1016/j.jpowsour.2025.238528","url":null,"abstract":"<div><div>The separator plays an important role in transporting ions and preventing thermal runaway, which affects the safety of lithium-ion batteries (LIBs). Herein, a novel aluminum oxide-modified polyethylene terephthalate-based track-etched membrane (Al<sub>2</sub>O<sub>3</sub>/PETTEM) separator is fabricated through a combination of heavy-ion track etching and vacuum filtration methods to regulate lithium-ion transport and improve the safety of LIBs. The separator features a hierarchical nanochannel structure composed of the vertically aligned channels in PETTEM and the gaps between Al<sub>2</sub>O<sub>3</sub> nanoparticles on the PETTEM surface, which facilitates the rapid transport and uniform deposition of lithium ions. As a result, the Li||Li cell with the Al<sub>2</sub>O<sub>3</sub>/PETTEM separator achieves an extended cycle lifespan of up to 1000 h at 0.5 mA cm<sup>−2</sup>. The LFP||Li cell with the Al<sub>2</sub>O<sub>3</sub>/PETTEM separator exhibits a high initial discharge specific capacity of 143 mA h g<sup>−1</sup> and maintains 94 % capacity after 200 cycles at room temperature. Additionally, after being modified with Al<sub>2</sub>O<sub>3</sub> nanoparticles, the separator exhibits enhanced thermal stability, enabling stable battery operation at an elevated temperature of up to 120 °C and retaining 93.3 % capacity after 200 cycles. This work can offer promising strategies for developing high-safety LIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238528"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218516","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

Highly conductive locally graphitized sheath on fibrous micro-Si anode for high-energy Li-ion battery 高能锂离子电池用纤维微硅阳极高导电性局部石墨化护套

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238530

Jin Yong Kwon , Younsang Cho , Jin Jun Heo , Hyungmin Park , Byeongho Park , Jihee Yoon , Youngseok Oh , Jin Woo Yi , Jaegeon Ryu

{"title":"Highly conductive locally graphitized sheath on fibrous micro-Si anode for high-energy Li-ion battery","authors":"Jin Yong Kwon , Younsang Cho , Jin Jun Heo , Hyungmin Park , Byeongho Park , Jihee Yoon , Youngseok Oh , Jin Woo Yi , Jaegeon Ryu","doi":"10.1016/j.jpowsour.2025.238530","DOIUrl":"10.1016/j.jpowsour.2025.238530","url":null,"abstract":"<div><div>Silicon (Si) is a promising anode material for developing high-energy-density lithium-ion batteries, yet challenges remain in improving its mechanical stability and intrinsic conductivity. Therefore, reinforcing the Si by microstructuring and modulating the electronic structure, such as doping, is critical. However, the typical high-energy doping process compromises the fine engineering of porous structures, and such a trade-off inevitably hinders the establishment of an energy-efficient and facile protocol to produce highly conductive but volume-accommodating Si anodes. Herein, we report a one-pot synthesis route for fabricating nickel-doped fibrous microspherical Si anodes by exploiting simple galvanic replacement at a relatively low temperature in a scalable manner. The nickel dopant emerging from the reaction serves as an electronic booster and structural support for the Si framework. Furthermore, homogeneously distributed dopants catalyze the graphitization of carbon sheath in part which features mechanical stiffness and high ionic/electrical conductivity. Consequently, synergistic effects from the multifunctional dopant and mixed conducting sheath enable a stable and fast battery operation, achieving a quick stabilization of coulombic efficiency exceeding 99 %. Thus, the full-cell paired with the LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> cathode shows 80 % capacity retention after 250 cycles by preventing irreversible Li consumption. This work sheds light on the utilization of classical chemistry to prepare high-performing battery materials.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238530"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218678","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

Novel microtubular solid oxide fuel cells with mesoscale surface patterns 具有中尺度表面图案的新型微管固体氧化物燃料电池

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238536

Bora Timurkutluk , Ahmet Alp Sunecli , Cigdem Timurkutluk , Sezer Onbilgin

{"title":"Novel microtubular solid oxide fuel cells with mesoscale surface patterns","authors":"Bora Timurkutluk , Ahmet Alp Sunecli , Cigdem Timurkutluk , Sezer Onbilgin","doi":"10.1016/j.jpowsour.2025.238536","DOIUrl":"10.1016/j.jpowsour.2025.238536","url":null,"abstract":"<div><div>In this study, a novel approach for fabricating microtubular solid oxide fuel cells (SOFCs) with mesoscale surface patterns is developed to enhance electrochemical performance via interface engineering. Various patterned anode supports are produced by wrapping the corresponding tape-cast green films onto water-soluble 3D-printed sacrificial rods featuring a range of surface dimple geometries, followed by isostatic pressing and mold removal. Complete patterned cells are further constructed on these supports through dip-coating and sintering processes. While microscopic analyses confirm successful transfer of surface features to both inner and outer surfaces of the anode support microtubes, mechanical testing reveals a reduction in flexural strength of the anode supports, attributed to localized thinning and stress concentrations induced by the patterned geometry. Electrochemical tests show significant improvements in power output, up to ∼85 %, for all patterned cells compared to the unpatterned reference cell, with the highest peak power density reaching 0.421 Wcm<sup>−2</sup> at 800 °C. Impedance analysis indicates that reduced charge transfer and gas diffusion resistances are responsible for the improved performance. These findings demonstrate that morphological patterning of microtubular SOFCs is a promising route for enhancing performance without compromising structural integrity, offering new opportunities for compact and high-efficiency microtubular SOFC stack design.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238536"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218584","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

Synthesis of Fe-NC catalysts derived from ZIF-8 encapsulating different Fe sources: Oxygen reduction activity and application in air-cathode microbial fuel cell 包封不同铁源的ZIF-8 Fe- nc催化剂的合成：氧还原活性及其在空气阴极微生物燃料电池中的应用

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238545

Ziqi Shen, Bo Tan, Yanglin Liu, Qiang Wang, Ting Zhang, Lin Wang

{"title":"Synthesis of Fe-NC catalysts derived from ZIF-8 encapsulating different Fe sources: Oxygen reduction activity and application in air-cathode microbial fuel cell","authors":"Ziqi Shen, Bo Tan, Yanglin Liu, Qiang Wang, Ting Zhang, Lin Wang","doi":"10.1016/j.jpowsour.2025.238545","DOIUrl":"10.1016/j.jpowsour.2025.238545","url":null,"abstract":"<div><div>Oxygen reaction reduction (ORR) catalyst plays an important role on the electricity generation performance of microbial fuel cell (MFC). Fe-N-C materials have attracted extensive attention due to their low cost, simple synthesis procedure and excellent ORR activity. To evaluate the effect of Fe source on catalyst synthesis, three Fe-containing compounds including ferric acetylacetonate (Fe(acac)<sub>3</sub>), ferrous phthalocyanine (FePc) and ferrous bisglycinate (Fe(Gly)<sub>2</sub>) are employed as Fe source for preparation of Fe/ZIF-8 precursor. After pyrolysis, the obtained catalysts are named as Fe(A)-NC, Fe(P)-NC and Fe(G)-NC, respectively. The onset potential (<em>E</em><sub>onset</sub>) and half-wave potential (<em>E</em><sub>1/2</sub>) of Fe(A)-NC are 0.828 and 0.690 V, respectively, superior to commercial 20 % Pt/C (0.808 and 0.687 V), Fe(P)-NC (0.813 and 0.688 V) and Fe(G)-NC (0.816 and 0.664 V) in oxygen-saturated 50 mM PBS solution. Electrochemical analyses confirm a four-electron-transfer pathway of the ORR on Fe(A)-NC. Air-cathode (AC) MFCs are constructed to assess the application of the synthesized catalysts. The AC-MFC loaded with Fe(A)-NC exhibites excellent stability and efficient removal rate of chemical oxygen demand (COD) during cell operation over 24 days (6 cycles). The maximum power density of the MFC loaded with Fe(A)-NC is 1917 mW m<sup>−2</sup>, higher than 20 % Pt/C (1428 mW m<sup>−2</sup>).</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238545"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218593","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

Chitosan-based polyelectrolyte complex membrane of carboxymethylchitosan and chitosan as alternative separator for zinc dendrite suppression in zinc-ion batteries 壳聚糖基羧甲基壳聚糖聚电解质复合膜与壳聚糖作为锌离子电池中抑制锌枝晶的替代隔膜

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238502

Muhammad Bagus Arif , Dicky Annas , Evi Yulianti , Qolby Sabrina , Sudaryanto , Evi Triwulandari , Witta Kartika Restu , Sun Theo Constan Lotebulo Ndruru , Muhammad Ghozali

{"title":"Chitosan-based polyelectrolyte complex membrane of carboxymethylchitosan and chitosan as alternative separator for zinc dendrite suppression in zinc-ion batteries","authors":"Muhammad Bagus Arif , Dicky Annas , Evi Yulianti , Qolby Sabrina , Sudaryanto , Evi Triwulandari , Witta Kartika Restu , Sun Theo Constan Lotebulo Ndruru , Muhammad Ghozali","doi":"10.1016/j.jpowsour.2025.238502","DOIUrl":"10.1016/j.jpowsour.2025.238502","url":null,"abstract":"<div><div>The use of zinc-ion batteries (ZIBs) as alternative energy storage devices is increasing owing to the high energy density, eco-friendliness, and ease of processing. However, the performance is limited by challenges such as zinc dendrite formation. Herein, polyelectrolyte complex membranes made from carboxymethylchitosan (CMCS) and chitosan (CS), denoted as chi-PEC, were developed as separators to suppress dendrite growth. CMCS and CS were mixed to form white precipitates, which were then centrifuged and compressed into membranes. Salt doping was applied during membrane formation to evaluate its effects. The membranes rely on dynamic ionic crosslinking—without chemical crosslinkers—between CMCS and CS functional groups, which promotes uniform zinc-ion distribution and minimizes ionic repulsion. The CMCS/CS membranes exhibited optimum conductivity of ion on approximately of 3.71 × 10<sup>−3</sup> S cm<sup>−1</sup> and a transference number of zinc of around 0.52. After 200 charge–discharge cycles, zinc anodes with chi-PEC separators showed dense zinc deposition, indicating reduced dendrite formation and enhanced battery stability.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238502"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218623","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

Entropy-engineered Ge-Sb-Se-Te alloys: Phase stability, thermoelectric properties and conversion efficiency 熵工程Ge-Sb-Se-Te合金：相稳定性、热电性能和转换效率

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238515

Cheng-Ruei Wu , Yun‐Han Huang Lu , Hsin-Jay Wu , Chien-Neng Liao

{"title":"Entropy-engineered Ge-Sb-Se-Te alloys: Phase stability, thermoelectric properties and conversion efficiency","authors":"Cheng-Ruei Wu , Yun‐Han Huang Lu , Hsin-Jay Wu , Chien-Neng Liao","doi":"10.1016/j.jpowsour.2025.238515","DOIUrl":"10.1016/j.jpowsour.2025.238515","url":null,"abstract":"<div><div>Germanium telluride (GeTe) is a promising mid-temperature thermoelectric material, but its rhombohedral-to-cubic phase transition near 700 K causes lattice strain and volumetric mismatch at module junctions, particularly on the hot side under large temperature gradients. This structural instability limits device reliability. To address this, we stabilize the cubic phase through entropy engineering by incorporating substantial amounts of Sb and Se into the GeTe lattice. The resulting Ge<sub>0.5-x</sub>Sb<sub>x</sub>Se<sub>0.18</sub>Te<sub>0.32</sub> (x = 0.08–0.15) alloys maintain the cubic phase from room temperature upward, eliminating the detrimental phase transition. These alloys exhibit Seebeck coefficients of 200–250 μV K<sup>−1</sup> and an ultralow thermal conductivity of 0.68 W m<sup>−1</sup> K<sup>−1</sup> at 300 K. A single-leg module fabricated from the optimized alloy achieves 4.7 % conversion efficiency under a 350 K temperature gradient, with electrical and thermal contact resistances of approximately 10<sup>−4</sup> Ω cm<sup>2</sup> and 10<sup>−4</sup> m<sup>2</sup> K W<sup>−1</sup>, respectively. This work presents a practical strategy to enhance the phase stability and thermoelectric performance of GeTe-based alloys, while elucidating the impact of contact resistances on module conversion efficiency. These results underscore the promise of entropy-engineered Ge-Sb-Se-Te systems for scalable thermoelectric power generation in waste heat recovery applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238515"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218673","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

Bi-Sn bimetallic catalysts for efficient electrocatalytic nitrogen reduction to ammonia 高效电催化氮还原制氨的铋锡双金属催化剂

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238483

Jinwang Li , Jianglin Tu , Zhefei Pan , Liang An , Rong Chen

{"title":"Bi-Sn bimetallic catalysts for efficient electrocatalytic nitrogen reduction to ammonia","authors":"Jinwang Li , Jianglin Tu , Zhefei Pan , Liang An , Rong Chen","doi":"10.1016/j.jpowsour.2025.238483","DOIUrl":"10.1016/j.jpowsour.2025.238483","url":null,"abstract":"<div><div>The development of efficient electrocatalysts for sustainable ammonia synthesis via the nitrogen reduction reaction remains a critical challenge due to the inherent stability of N ≡ N bonds and competing hydrogen evolution reaction. Herein, we present a bimetallic Bi-Sn catalyst synthesized through galvanic replacement and electrodeposition, demonstrating enhanced nitrogen reduction performance under ambient conditions. The optimized Bi-Sn catalyst achieves an ammonia yield of 17.09 μg h<sup>−1</sup>·mg<sub>cat</sub><sup>−1</sup> with a Faradaic efficiency of 5.37 % at −0.4 V vs. reversible hydrogen electrode, representing an obvious improvement over pristine Bi. Comprehensive characterization reveals that Sn nanoparticles are uniformly decorated on the Bi surfaces, increasing the electrochemical surface area while enhancing electrode conductivity. Theoretical calculations elucidate the synergistic mechanism: Sn modulates the Bi 6p band center, reducing the energy barrier for the rate-determining step of ∗N<sub>2</sub> → ∗NNH by 16.9 % (ΔG = 1.72 eV vs. 2.07 eV for Bi) and enhancing nitrogen adsorption (0.20 eV vs. 0.28 eV). This work establishes an integrated strategy of structural engineering and electronic modulation for designing bimetallic catalysts, advancing sustainable ammonia synthesis.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238483"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218629","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

Mo-H interaction modification and heterostructure engineering of Mo2C for striking water splitting electrocatalyst 冲击水裂解电催化剂Mo2C的Mo-H相互作用改性及异质结构工程

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-01 DOI: 10.1016/j.jpowsour.2025.238506

Feng Wu, Fan Zhong, Weilin Kong, Lu Zou, Faquan Yu

{"title":"Mo-H interaction modification and heterostructure engineering of Mo2C for striking water splitting electrocatalyst","authors":"Feng Wu, Fan Zhong, Weilin Kong, Lu Zou, Faquan Yu","doi":"10.1016/j.jpowsour.2025.238506","DOIUrl":"10.1016/j.jpowsour.2025.238506","url":null,"abstract":"<div><div>Facing the inherent sluggish hydrogen evolution reaction/oxygen evolution reaction (HER/OER) kinetics of Mo<sub>2</sub>C catalyst, a straightforward and scalable approach is proposed to synthesize flower-like heterojunction catalysts TM-Mo<sub>2</sub>C/NC, consisting of carbon nanosheets doped with nitrogen and Mo<sub>2</sub>C nanoparticles doped with transition metals (Fe, Co, Ni). Benefiting from the layered hollow sphere framework that provides numerous active sites, the Ni-Mo<sub>2</sub>C/NC catalyst demonstrates outstanding HER activity, achieving an overpotential of 111 mV at 10 mA cm<sup>−2</sup>. Co-Mo<sub>2</sub>C/NC has the lowest Tafel slope of 54.9 mV dec<sup>−1</sup> during the OER process, indicating the highest inherent catalytic activity. The synergistic effect of Mo-H interaction regulation and heterostructure construction can be achieved by the TM dopant, which significantly improves the HER/OER activity. This work offers an effective strategy for devising high efficiency Mo<sub>2</sub>C-based catalysts for energy conversion.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238506"},"PeriodicalIF":7.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218594","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