Journal of Power Sources最新文献_第2页

High entropy oxides (CuCoMnMgZn)O microspheres as counter electrodes for quantum dot sensitized solar cells

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236946

Limin Zhang, Tingting Zhang, Donghui Cui, Chunxue Wang, Huiyang Yu, Fengyan Li

In quantum dot sensitized solar cells (QDSSCs), the counter electrode serves as an essential component by collecting electrons from the external circuit and catalyzing the electrolyte. In this work, four spinel-type high-entropy oxides are synthesized using a solvothermal method and are being applied with CdTe/Mn-CdS/CdSe/ZnS photoanodes for QDSSCs to explore counter electrode materials with better performance by adjusting the elements in the high-entropy oxides. The exploration reveals that the surface of (CuCoMnMgZn)O appears rough, with pores and a large specific surface area (125.61 m²/g), supplying substantial active sites to promote electron transfer and facilitate electrolyte access. The counter electrode photovoltaic conversion efficiency (PCE) of QDSSCs composed using this material is 8.33 %, which is significantly higher than that of other high entropy oxides (6.5–7.5 %). Other photovoltaic performances are demonstrated as J_sc = 26.25 mA· cm⁻², V_oc = 0.646 V, and FF = 0.49. Electrochemical impedance spectroscopy (EIS) and continuous cyclic voltammetry curves confirm the lowest charge transfer resistance (R_ct = 0.191 Ω) and good stability in the S²⁻/S_n²⁻ reduction reaction. Both the higher catalytic activity and stability further indicate that the high-entropy oxide could be a prospective material for QDSSCs counter electrodes.

{"title":"High entropy oxides (CuCoMnMgZn)O microspheres as counter electrodes for quantum dot sensitized solar cells","authors":"Limin Zhang, Tingting Zhang, Donghui Cui, Chunxue Wang, Huiyang Yu, Fengyan Li","doi":"10.1016/j.jpowsour.2025.236946","DOIUrl":"10.1016/j.jpowsour.2025.236946","url":null,"abstract":"<div><div>In quantum dot sensitized solar cells (QDSSCs), the counter electrode serves as an essential component by collecting electrons from the external circuit and catalyzing the electrolyte. In this work, four spinel-type high-entropy oxides are synthesized using a solvothermal method and are being applied with CdTe/Mn-CdS/CdSe/ZnS photoanodes for QDSSCs to explore counter electrode materials with better performance by adjusting the elements in the high-entropy oxides. The exploration reveals that the surface of (CuCoMnMgZn)O appears rough, with pores and a large specific surface area (125.61 m<sup>2</sup>/g), supplying substantial active sites to promote electron transfer and facilitate electrolyte access. The counter electrode photovoltaic conversion efficiency (PCE) of QDSSCs composed using this material is 8.33 %, which is significantly higher than that of other high entropy oxides (6.5–7.5 %). Other photovoltaic performances are demonstrated as J<sub>sc</sub> = 26.25 mA· cm<sup>−2</sup>, V<sub>oc</sub> = 0.646 V, and FF = 0.49. Electrochemical impedance spectroscopy (EIS) and continuous cyclic voltammetry curves confirm the lowest charge transfer resistance (R<sub>ct</sub> = 0.191 Ω) and good stability in the S<sup>2−</sup>/S<sub>n</sub><sup>2−</sup> reduction reaction. Both the higher catalytic activity and stability further indicate that the high-entropy oxide could be a prospective material for QDSSCs counter electrodes.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785131","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

Sustainable electrochemical energy generation using ultrathin nanoflakes of mixed phase CoMnMoS as a robust electrocatalyst

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236954

Amol S. Salunke , Ruturaj P. Patil , Nabeen K. Shrestha , Sangeun Cho , Hyunsik Im , Akbar I. Inamdar

Hydrogen evolution reaction (HER) electrocatalysts based on non-precious metals have been the subject of research across a broad pH range due to the growing demand for efficient and economical water-splitting devices. To do so, ternary metal sulfides have been utilized as an efficient HER electrocatalyst because of their excellent physical, chemical properties and semiconducting characteristics. Therefor in this work we studied transition metal (Co)-decorated ternary metal sulfides (MnMoS) on Nickel foam for HER activity. The MnMoS catalysts are synthesized using hydrothermal technique followed by Co-decoration via electrodeposition. It shows superior electrochemical properties such as low HER overpotentials of 91 mV at a current density of 10 mA cm⁻² in alkaline media, a Tafel slope of 105.6 mV dec⁻¹. Moreover, Co-MnMOS exhibited remarkable electrochemical stability for over 100 h, under a high current density of 1000 mA cm⁻². The overall water splitting (OWS) activity of the electrolyzer fabricated with benchmark RuO₂ at the anode and the Co-MnMoS at the cathode demonstrated exceptionally low potential of the 1.52 V to achieve a current density of the 10-mA cm⁻² with a Faradaic efficiency of 95 %. Moreover, it is highly durable and active in alkaline solution even at high current density of the 800-mA cm⁻² demonstrating its promising candidature for green hydrogen technology.

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引用次数: 0

Enhancing heat-source free water-floating single-walled carbon nanotube thermoelectric generators with water-absorbing paper

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236966

Yuto Nakazawa, Shuya Ochiai, Yutaro Okano, Reon Okutsu, Yuki Amma, Masayuki Takashiri

Thermoelectric generators (TEGs) are a promising energy-harvesting technology that convert ambient thermal energy into electrical energy. However, their reliance on hot and cold sources to establish a temperature gradient remains a challenge. Water-floating single-walled carbon nanotube (SWCNT) TEGs address this limitation by self-generating a temperature gradient through evaporative cooling in specific areas. Despite this advantage, their temperature gradient is relatively small, leading to a low output voltage. In this study, we embedded water-absorbing paper into SWCNT-TEGs to enhance the temperature gradient and improve performance. Six types of paper with varying water absorbencies were tested, and the performance of the SWCNT-TEGs was evaluated. The output voltage increased with water absorbency, reaching 1.14 ± 0.13 mV–2.3 times higher than a conventional SWCNT-TEG—when placed in 60 °C water without sunlight. This improvement resulted from enhanced evaporative cooling, which increased water vapor generation and amplified the temperature gradient in the SWCNT films. One possible mechanism for enhanced evaporative cooling is enhanced capillary forces at the rough interface between the SWCNT film and the water-absorbing paper, where a thin water film exists. Our findings demonstrate that embedding water-absorbing paper can significantly enhance the performance of water-floating SWCNT-TEGs.

{"title":"Enhancing heat-source free water-floating single-walled carbon nanotube thermoelectric generators with water-absorbing paper","authors":"Yuto Nakazawa, Shuya Ochiai, Yutaro Okano, Reon Okutsu, Yuki Amma, Masayuki Takashiri","doi":"10.1016/j.jpowsour.2025.236966","DOIUrl":"10.1016/j.jpowsour.2025.236966","url":null,"abstract":"<div><div>Thermoelectric generators (TEGs) are a promising energy-harvesting technology that convert ambient thermal energy into electrical energy. However, their reliance on hot and cold sources to establish a temperature gradient remains a challenge. Water-floating single-walled carbon nanotube (SWCNT) TEGs address this limitation by self-generating a temperature gradient through evaporative cooling in specific areas. Despite this advantage, their temperature gradient is relatively small, leading to a low output voltage. In this study, we embedded water-absorbing paper into SWCNT-TEGs to enhance the temperature gradient and improve performance. Six types of paper with varying water absorbencies were tested, and the performance of the SWCNT-TEGs was evaluated. The output voltage increased with water absorbency, reaching 1.14 ± 0.13 mV–2.3 times higher than a conventional SWCNT-TEG—when placed in 60 °C water without sunlight. This improvement resulted from enhanced evaporative cooling, which increased water vapor generation and amplified the temperature gradient in the SWCNT films. One possible mechanism for enhanced evaporative cooling is enhanced capillary forces at the rough interface between the SWCNT film and the water-absorbing paper, where a thin water film exists. Our findings demonstrate that embedding water-absorbing paper can significantly enhance the performance of water-floating SWCNT-TEGs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":"Article 236966"},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailored Co3O4/MnO2 heterostructure via sequential ionic layering for high performance supercapacitor applications

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236980

Muqaddas M. Mujawar , Vinod V. Patil , Vijay S. Kumbhar , Umakant M. Patil , Nilesh R. Chodankar , Amal Al Ghaferi , Masaharu Nakayama , Jae-Jin Shim

Energy storage technology is facing the challenge of fabrication of low-cost supercapacitors with high specific energy without compromising its specific power and stability. The present work deals with the cost-effective and simple strategy towards the formation of Co₃O₄/MnO₂ core/shell electrodes to get rid of the aforementioned challenges. Herein, an easiest successive ionic layer adsorption and reaction (SILAR) method is employed to obtain hexagonal Co₃O₄ nanoplates which then coated with the state of art MnO₂ nanosheets forming highly porous core/shell electrode. Due to synergistic effect between Co₃O₄ and MnO₂, the Co₃O₄/MnO₂ core/shell electrode showed an improved specific capacitance of 744 F g⁻¹ and rate capability of 45 % for 5-fold increase in the current density. Moreover, it exhibited a capacitive retention of 85.3 % after 10,000 charge-discharge cycles at 10 A g⁻¹ which can be attributed to the vertically aligned Co₃O₄ nanoplates as backbone to the MnO₂ shell material. Furthermore, all-solid-state supercapacitor is fabricated between Co₃O₄/MnO₂//reduced graphene oxide using KOH-polyvinyl alcohol polymer based gel electrolyte. It delivered a maximum specific energy and specific power of 46.57 Wh kg⁻¹ and 2794 kW kg⁻¹, respectively. Finally, as-fabricated device performance is demonstrated through the discharge of 50 light emitting diodes (LEDs).

{"title":"Tailored Co3O4/MnO2 heterostructure via sequential ionic layering for high performance supercapacitor applications","authors":"Muqaddas M. Mujawar , Vinod V. Patil , Vijay S. Kumbhar , Umakant M. Patil , Nilesh R. Chodankar , Amal Al Ghaferi , Masaharu Nakayama , Jae-Jin Shim","doi":"10.1016/j.jpowsour.2025.236980","DOIUrl":"10.1016/j.jpowsour.2025.236980","url":null,"abstract":"<div><div>Energy storage technology is facing the challenge of fabrication of low-cost supercapacitors with high specific energy without compromising its specific power and stability. The present work deals with the cost-effective and simple strategy towards the formation of Co<sub>3</sub>O<sub>4</sub>/MnO<sub>2</sub> core/shell electrodes to get rid of the aforementioned challenges. Herein, an easiest successive ionic layer adsorption and reaction (SILAR) method is employed to obtain hexagonal Co<sub>3</sub>O<sub>4</sub> nanoplates which then coated with the state of art MnO<sub>2</sub> nanosheets forming highly porous core/shell electrode. Due to synergistic effect between Co<sub>3</sub>O<sub>4</sub> and MnO<sub>2</sub>, the Co<sub>3</sub>O<sub>4</sub>/MnO<sub>2</sub> core/shell electrode showed an improved specific capacitance of 744 F g<sup>−1</sup> and rate capability of 45 % for 5-fold increase in the current density. Moreover, it exhibited a capacitive retention of 85.3 % after 10,000 charge-discharge cycles at 10 A g<sup>−1</sup> which can be attributed to the vertically aligned Co<sub>3</sub>O<sub>4</sub> nanoplates as backbone to the MnO<sub>2</sub> shell material. Furthermore, all-solid-state supercapacitor is fabricated between Co<sub>3</sub>O<sub>4</sub>/MnO<sub>2</sub>//reduced graphene oxide using KOH-polyvinyl alcohol polymer based gel electrolyte. It delivered a maximum specific energy and specific power of 46.57 Wh kg<sup>−1</sup> and 2794 kW kg<sup>−1</sup>, respectively. Finally, as-fabricated device performance is demonstrated through the discharge of 50 light emitting diodes (LEDs).</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":"Article 236980"},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785077","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

Innovative polymer-based, miniaturized solid-state reference electrode: A sustainable solution for potentiometric and electrochemical power sources

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236945

Khadiga M. Kelani , Badr A. El-Zeany , Eman S. Elzanfaly , Michael K. Halim , Ahmed Emad F. Abbas , Ahmed S. Saad

The rapid development of miniaturized energy storage systems, such as batteries and fuel cells, requires compact, stable, and liquid-junction-free reference electrodes for precise electrochemical characterization. This study presents a novel all-solid-state reference electrode (S-RE) based on polymeric ion exchangers embedded in a carbon-paste matrix, offering a sustainable solution for potentiometric and electrochemical power sources. The S-RE eliminates liquid junctions, providing superior stability, broad electrolyte compatibility, and ease of miniaturization, making it ideal for next-generation energy applications.

The polymeric ion exchangers in the S-RE ensure low solubility, high ion-exchange capacity, and strong mechanical and pH stability, making it compatible with various electrolytes. Electrochemical evaluations were performed in acidic, alkaline, neutral, and non-aqueous media, confirming the electrode's reliability. The optimized design, incorporating a cation-exchanger and an anion-exchanger, enhances stability and long-term performance in extreme environments.

Benchmarking against hydrogen reference electrodes and Hg/HgO electrodes validated its suitability for energy storage applications. Additionally, the S-RE demonstrated statistical equivalence to Ag/AgCl electrodes in the potentiometric determination of isoxsuprine (ISX). Its miniaturized design supports sample volumes as low as 500 μL, while its cost-effective fabrication makes it scalable for industrial applications, positioning the S-RE as a promising alternative for electrochemical diagnostics in energy storage and sensing technologies.

{"title":"Innovative polymer-based, miniaturized solid-state reference electrode: A sustainable solution for potentiometric and electrochemical power sources","authors":"Khadiga M. Kelani , Badr A. El-Zeany , Eman S. Elzanfaly , Michael K. Halim , Ahmed Emad F. Abbas , Ahmed S. Saad","doi":"10.1016/j.jpowsour.2025.236945","DOIUrl":"10.1016/j.jpowsour.2025.236945","url":null,"abstract":"<div><div>The rapid development of miniaturized energy storage systems, such as batteries and fuel cells, requires compact, stable, and liquid-junction-free reference electrodes for precise electrochemical characterization. This study presents a novel all-solid-state reference electrode (S-RE) based on polymeric ion exchangers embedded in a carbon-paste matrix, offering a sustainable solution for potentiometric and electrochemical power sources. The S-RE eliminates liquid junctions, providing superior stability, broad electrolyte compatibility, and ease of miniaturization, making it ideal for next-generation energy applications.</div><div>The polymeric ion exchangers in the S-RE ensure low solubility, high ion-exchange capacity, and strong mechanical and pH stability, making it compatible with various electrolytes. Electrochemical evaluations were performed in acidic, alkaline, neutral, and non-aqueous media, confirming the electrode's reliability. The optimized design, incorporating a cation-exchanger and an anion-exchanger, enhances stability and long-term performance in extreme environments.</div><div>Benchmarking against hydrogen reference electrodes and Hg/HgO electrodes validated its suitability for energy storage applications. Additionally, the S-RE demonstrated statistical equivalence to Ag/AgCl electrodes in the potentiometric determination of isoxsuprine (ISX). Its miniaturized design supports sample volumes as low as 500 μL, while its cost-effective fabrication makes it scalable for industrial applications, positioning the S-RE as a promising alternative for electrochemical diagnostics in energy storage and sensing technologies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":"Article 236945"},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785073","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 interpretability in data-driven battery capacity estimation through degradation mode analysis

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236938

Xinhong Feng, Yongzhi Zhang

To explore the relationship between aging features and battery capacity, this study utilizes degradation modes (DMs) as bridging features to construct a simple yet robust capacity estimation model. DMs explain the impact of aging mechanisms on capacity loss, leading to the DM–capacity model (Model 2). Moreover, the aging information reflected by the features is validated through DMs, resulting in the feature–DM model (Model 1). The single-cell model (SCM), composed of these two submodels, is validated on a dataset of 12 cells, which are paired into 6 parallel packs undergoing cycling experiments under various thermal gradient conditions. The validation errors are less than 0.06 Ah in terms of the root mean square error (RMSE), confirming the model's robustness and generalizability. Owing to Model 2 being suitable for packs, the SCM is adapted for estimating battery pack capacity by retraining Model 1 on the basis of pack data, with RMSEs below 0.06 Ah. This finding indicates that the proposed method reduces the modeling effort for pack capacity estimation when considering interpretability. When thermal gradients exist in the battery pack, adding temperature features as inputs in addition to the aging features compensates for the missing condition information, achieving 0.008 Ah RMSE at capacity estimation. This work offers a valuable reference for practical battery pack capacity estimation.

{"title":"Enhancing interpretability in data-driven battery capacity estimation through degradation mode analysis","authors":"Xinhong Feng, Yongzhi Zhang","doi":"10.1016/j.jpowsour.2025.236938","DOIUrl":"10.1016/j.jpowsour.2025.236938","url":null,"abstract":"<div><div>To explore the relationship between aging features and battery capacity, this study utilizes degradation modes (DMs) as bridging features to construct a simple yet robust capacity estimation model. DMs explain the impact of aging mechanisms on capacity loss, leading to the DM–capacity model (Model 2). Moreover, the aging information reflected by the features is validated through DMs, resulting in the feature–DM model (Model 1). The single-cell model (SCM), composed of these two submodels, is validated on a dataset of 12 cells, which are paired into 6 parallel packs undergoing cycling experiments under various thermal gradient conditions. The validation errors are less than 0.06 Ah in terms of the root mean square error (RMSE), confirming the model's robustness and generalizability. Owing to Model 2 being suitable for packs, the SCM is adapted for estimating battery pack capacity by retraining Model 1 on the basis of pack data, with RMSEs below 0.06 Ah. This finding indicates that the proposed method reduces the modeling effort for pack capacity estimation when considering interpretability. When thermal gradients exist in the battery pack, adding temperature features as inputs in addition to the aging features compensates for the missing condition information, achieving 0.008 Ah RMSE at capacity estimation. This work offers a valuable reference for practical battery pack capacity estimation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785158","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

Upcycling strategy of spent LiCoO2: Toward enhanced high-voltage stability based on Al doping

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236950

Hongbin Lin , Guiying Zhao , Xiumei Kang , Weijian Zhang , Yue Chen , Guigui Xu , Kehua Zhong , Jian-Min Zhang , Zhigao Huang

Direct regeneration of spent LiCoO₂ in recycling field is regarded as a promising strategy to reduce production costs and alleviate the burden of metal pollution. Targeting the extensively studied high-voltage LiCoO₂ electrode, the simultaneous achievement of restoring the spent LiCoO₂ and upgrading the high-voltage stability of regenerated LiCoO₂ poses a considerable challenge. Herein, based on a first-principles-informed thermodynamic study, a modulation strategy has been proposed by introducing Al doping during direct regeneration to enhance the high-voltage performance of regenerated LiCoO₂. The calculated results reveal that, due to the sufficient Li vacancies in the spent LiCoO₂, Al atoms can preferentially occupy the Li vacancies (denoted as Al_V(Li)) rather than Co sites (denoted as Al_Co) by synergistically regulating Co chemical potential and temperature. Inspiringly, the surface stability of regenerated LiCoO₂ with Al_V(Li) doping is significantly enhanced at high voltages. Furthermore, although both Al_V(Li) and Al_Co doping improve the electronic conductivity of regenerated LiCoO₂, only the Al_V(Li) doping exhibits an improvement of the Li⁺ diffusion kinetics. This innovative strategy provides a novel perspective for the efficient and high-quality recycling of the spent LiCoO₂ in industrial applications.

{"title":"Upcycling strategy of spent LiCoO2: Toward enhanced high-voltage stability based on Al doping","authors":"Hongbin Lin , Guiying Zhao , Xiumei Kang , Weijian Zhang , Yue Chen , Guigui Xu , Kehua Zhong , Jian-Min Zhang , Zhigao Huang","doi":"10.1016/j.jpowsour.2025.236950","DOIUrl":"10.1016/j.jpowsour.2025.236950","url":null,"abstract":"<div><div>Direct regeneration of spent LiCoO<sub>2</sub> in recycling field is regarded as a promising strategy to reduce production costs and alleviate the burden of metal pollution. Targeting the extensively studied high-voltage LiCoO<sub>2</sub> electrode, the simultaneous achievement of restoring the spent LiCoO<sub>2</sub> and upgrading the high-voltage stability of regenerated LiCoO<sub>2</sub> poses a considerable challenge. Herein, based on a first-principles-informed thermodynamic study, a modulation strategy has been proposed by introducing Al doping during direct regeneration to enhance the high-voltage performance of regenerated LiCoO<sub>2</sub>. The calculated results reveal that, due to the sufficient Li vacancies in the spent LiCoO<sub>2</sub>, Al atoms can preferentially occupy the Li vacancies (denoted as Al<sub>V(Li)</sub>) rather than Co sites (denoted as Al<sub>Co</sub>) by synergistically regulating Co chemical potential and temperature. Inspiringly, the surface stability of regenerated LiCoO<sub>2</sub> with Al<sub>V(Li)</sub> doping is significantly enhanced at high voltages. Furthermore, although both Al<sub>V(Li)</sub> and Al<sub>Co</sub> doping improve the electronic conductivity of regenerated LiCoO<sub>2</sub>, only the Al<sub>V(Li)</sub> doping exhibits an improvement of the Li<sup>+</sup> diffusion kinetics. This innovative strategy provides a novel perspective for the efficient and high-quality recycling of the spent LiCoO<sub>2</sub> in industrial applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":"Article 236950"},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785175","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 storage capability of NiCo2O4 nanosheet/nanowires hybrid arrays via synergistic collaborative MXene/Graphene

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236936

Jinyu Wu, Hongying Zhao, Lin Li, Hailong Shen, Jiaheng Xu, Xianqing Liang, Zhiqiang Lan, Wenzheng Zhou, Jin Guo, Haifu Huang

Transition metal oxides (TMOs) are potential high-performance electrode materials for supercapacitors, but their application is hindered by poor electrical conductivity and slow reaction kinetics. To overcome these challenges, self-supporting NiCo₂O₄ (NCO) nanosheet-nanowire hybrid arrays were synthesized through a two-step hydrothermal process. The hierarchical architecture is constructed by successively growing NCO on reduced graphene oxide (rGO)-coated Ni foam and subsequently wrapping with 2D Ti₃C₂T_x MXene layers. NCO serves as the energy storage material, while rGO and MXene collaboratively establish a three-dimensional conductive network, enhancing both electron transport and structural robustness. In the nanoarray, the composite denoted as MXene/NCO@rGO-NF exhibits strengthened interface effects (charge redistribution and lowered energy barriers at heterogeneous interfaces) and rapid electron transfer (uninterrupted electron pathways via MXene-rGO bridging). This design further promotes hydroxide ions (OH⁻) adsorption on NCO, accelerating redox reaction kinetics. As expected, the MXene/NCO@rGO-NF electrode delivers an outstanding specific capacity of 1236.5 C g⁻¹ at 1 A g⁻¹. When assembled into a hybrid supercapacitor, it achieves a maximum energy density of 34.6 Wh kg⁻¹ at 375 W kg⁻¹, with 82.5 % capacitance retention after 8000 cycles. This work demonstrates a stepwise assembly strategy to boost the electrochemical performance of TMOs with high-capacity electrodes with enhanced cycling stability.

{"title":"Enhanced electrochemical storage capability of NiCo2O4 nanosheet/nanowires hybrid arrays via synergistic collaborative MXene/Graphene","authors":"Jinyu Wu, Hongying Zhao, Lin Li, Hailong Shen, Jiaheng Xu, Xianqing Liang, Zhiqiang Lan, Wenzheng Zhou, Jin Guo, Haifu Huang","doi":"10.1016/j.jpowsour.2025.236936","DOIUrl":"10.1016/j.jpowsour.2025.236936","url":null,"abstract":"<div><div>Transition metal oxides (TMOs) are potential high-performance electrode materials for supercapacitors, but their application is hindered by poor electrical conductivity and slow reaction kinetics. To overcome these challenges, self-supporting NiCo<sub>2</sub>O<sub>4</sub> (NCO) nanosheet-nanowire hybrid arrays were synthesized through a two-step hydrothermal process. The hierarchical architecture is constructed by successively growing NCO on reduced graphene oxide (rGO)-coated Ni foam and subsequently wrapping with 2D Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene layers. NCO serves as the energy storage material, while rGO and MXene collaboratively establish a three-dimensional conductive network, enhancing both electron transport and structural robustness. In the nanoarray, the composite denoted as MXene/NCO@rGO-NF exhibits strengthened interface effects (charge redistribution and lowered energy barriers at heterogeneous interfaces) and rapid electron transfer (uninterrupted electron pathways via MXene-rGO bridging). This design further promotes hydroxide ions (OH<sup>−</sup>) adsorption on NCO, accelerating redox reaction kinetics. As expected, the MXene/NCO@rGO-NF electrode delivers an outstanding specific capacity of 1236.5 C g<sup>−1</sup> at 1 A g<sup>−1</sup>. When assembled into a hybrid supercapacitor, it achieves a maximum energy density of 34.6 Wh kg<sup>−1</sup> at 375 W kg<sup>−1</sup>, with 82.5 % capacitance retention after 8000 cycles. This work demonstrates a stepwise assembly strategy to boost the electrochemical performance of TMOs with high-capacity electrodes with enhanced cycling stability.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785688","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

Application of digital image correlation technology in investigating mechanical-related issues of lithium batteries

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236965

Zhuo Wang , Xu Zhang , Cuiying Dai , Yanjie Wang , Qi Liu , Mingli Jiao , Qiquan Li , Liwei Mi , Weiguo Mao

High energy and power densities are key development goals for lithium-ion batteries. However, mechanoelectrochemical coupling attenuation issues have restricted the breakthroughs in battery technology. Digital image correlation (DIC) technology has played a key role in revealing the multi-field-coupling problems. Herein, the setups, operating principles and application points of DIC-based testing systems were summarized. The application of optical DIC technology in the study of mechanical behavior and multi-field coupling effects in both traditional liquid electrolyte-based lithium-ion batteries and solid-state lithium metal batteries was systematically reviewed. Furthermore, the innovative integrated application and development of DIC technology with non-optical imaging equipment and other in situ/operando techniques were outlined and discussed. Finally, the challenges and feasible development tendencies associated with DIC were analyzed and proposed. This review aims to clarify the application potential and development strategies of DIC technology in studying the mechanical behavior of batteries and coupling theory among multiple physicochemical fields within batteries. This is critical for exploring the performance degradation mechanisms and architectural design strategies of high-performance batteries.

{"title":"Application of digital image correlation technology in investigating mechanical-related issues of lithium batteries","authors":"Zhuo Wang , Xu Zhang , Cuiying Dai , Yanjie Wang , Qi Liu , Mingli Jiao , Qiquan Li , Liwei Mi , Weiguo Mao","doi":"10.1016/j.jpowsour.2025.236965","DOIUrl":"10.1016/j.jpowsour.2025.236965","url":null,"abstract":"<div><div>High energy and power densities are key development goals for lithium-ion batteries. However, mechanoelectrochemical coupling attenuation issues have restricted the breakthroughs in battery technology. Digital image correlation (DIC) technology has played a key role in revealing the multi-field-coupling problems. Herein, the setups, operating principles and application points of DIC-based testing systems were summarized. The application of optical DIC technology in the study of mechanical behavior and multi-field coupling effects in both traditional liquid electrolyte-based lithium-ion batteries and solid-state lithium metal batteries was systematically reviewed. Furthermore, the innovative integrated application and development of DIC technology with non-optical imaging equipment and other in situ/operando techniques were outlined and discussed. Finally, the challenges and feasible development tendencies associated with DIC were analyzed and proposed. This review aims to clarify the application potential and development strategies of DIC technology in studying the mechanical behavior of batteries and coupling theory among multiple physicochemical fields within batteries. This is critical for exploring the performance degradation mechanisms and architectural design strategies of high-performance batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":"Article 236965"},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785070","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 architectured BiCe metal organic framework-integrated MoS2 nanosheet: An intriguing strategy for deriving synergistic effects in high-performance symmetric supercapacitors

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-07 DOI: 10.1016/j.jpowsour.2025.236924

Sugasri Chinnasamy, Jayachandran Madhavan, Pavithra Karthikesan, Alagiri Mani

Metal-organic framework (MOF) based supercapacitors have attracted enormous attention nowadays due to their unique physiochemical properties. In this study, we are addressing the synergistic effect of MoS₂ when intercalated with redox-active bimetallic MOF-2 to enhance the efficiency of the electrode material. Herein, bimetal MOF incorporating bismuth and cerium has been synthesized and MoS₂ is introduced to increase the electron transport potentially. All the samples underwent experimental characterization techniques to procure their crystal structure, morphology, surface area, and electrochemical properties. Electrochemical measurement demonstrates that the MOF-2@MoS₂ electrode presents a significant specific capacitance of 510 F g⁻¹ at a current density of 1 A g⁻¹ corresponding to a capacity of 255 C g⁻¹, while its initial capacitance remains at over 94 % even after 4500 cycles, with outstanding cycling stability. The MOF-2 rod-like structure is uniformly distributed on the surface and within the pores of the MoS₂ nanosheet, maintaining structural integrity throughout repeated cycles. Subsequently, a symmetric supercapacitor has been constructed using MOF-2@MoS₂ electrodes which delivers an energy density of 20.12 Wh kg⁻¹ at a power density of 799.47 W kg⁻¹, with excellent cycling stability of 92 % over 4500 cycles at 10 A g⁻¹. These findings suggest intercalating 2D material with bimetal MOF shows great promise for further practical application.

{"title":"A novel architectured BiCe metal organic framework-integrated MoS2 nanosheet: An intriguing strategy for deriving synergistic effects in high-performance symmetric supercapacitors","authors":"Sugasri Chinnasamy, Jayachandran Madhavan, Pavithra Karthikesan, Alagiri Mani","doi":"10.1016/j.jpowsour.2025.236924","DOIUrl":"10.1016/j.jpowsour.2025.236924","url":null,"abstract":"<div><div>Metal-organic framework (MOF) based supercapacitors have attracted enormous attention nowadays due to their unique physiochemical properties. In this study, we are addressing the synergistic effect of MoS<sub>2</sub> when intercalated with redox-active bimetallic MOF-2 to enhance the efficiency of the electrode material. Herein, bimetal MOF incorporating bismuth and cerium has been synthesized and MoS<sub>2</sub> is introduced to increase the electron transport potentially. All the samples underwent experimental characterization techniques to procure their crystal structure, morphology, surface area, and electrochemical properties. Electrochemical measurement demonstrates that the MOF-2@MoS<sub>2</sub> electrode presents a significant specific capacitance of 510 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> corresponding to a capacity of 255 C g<sup>−1</sup>, while its initial capacitance remains at over 94 % even after 4500 cycles, with outstanding cycling stability. The MOF-2 rod-like structure is uniformly distributed on the surface and within the pores of the MoS<sub>2</sub> nanosheet, maintaining structural integrity throughout repeated cycles. Subsequently, a symmetric supercapacitor has been constructed using MOF-2@MoS<sub>2</sub> electrodes which delivers an energy density of 20.12 Wh kg<sup>−1</sup> at a power density of 799.47 W kg<sup>−1</sup>, with excellent cycling stability of 92 % over 4500 cycles at 10 A g<sup>−1</sup>. These findings suggest intercalating 2D material with bimetal MOF shows great promise for further practical application.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"642 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785130","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