Journal of Power Sources最新文献_第3页

P/MoP2@C composite as a high rate capable anode for lithium ion batteries P/MoP2@C复合材料作为锂离子电池的高倍率负极

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-06 DOI: 10.1016/j.jpowsour.2025.237280

Doyeon Lee , Jongwon Lee , Dongjun Lee , Jung Eun Lee , Kyeong-Ho Kim , Seong-Hyeon Hong

{"title":"P/MoP2@C composite as a high rate capable anode for lithium ion batteries","authors":"Doyeon Lee , Jongwon Lee , Dongjun Lee , Jung Eun Lee , Kyeong-Ho Kim , Seong-Hyeon Hong","doi":"10.1016/j.jpowsour.2025.237280","DOIUrl":"10.1016/j.jpowsour.2025.237280","url":null,"abstract":"<div><div>Phosphorus/molybdenum diphosphide (P/MoP<sub>2</sub>) nanopowder is synthesized via a high energy mechanical milling (HEMM) and introduced as an anode for lithium ion batteries (LIBs). As-synthesized P/MoP<sub>2</sub> is composed of 10–20 nm-sized nanocrystallites, which are aggregated into a few hundred nanometer-sized secondary particles and MoP<sub>2</sub> nanocrystallites are embedded in the amorphous red P matrix. The P/MoP<sub>2</sub> electrode undergoes a conversion reaction of MoP<sub>2</sub> by forming molybdenum (Mo<sup>0</sup>) and lithium phosphide (Li<sub>3</sub>P) and an alloying reaction of elemental P by forming Li<sub>3</sub>P during lithiation. The recombination reaction from Mo<sup>0</sup> and Li<sub>3</sub>P to MoP<sub>2</sub> does not occur during charging. Consequently, the P/MoP<sub>2</sub> electrode shows high initial discharge and charge capacities of 1042.3 and 850.1 mAh g<sup>−1</sup>, respectively. The additional HEMM process with P/MoP<sub>2</sub> and multiwall carbon nanotubes (MWCNTs) yields the P/MoP<sub>2</sub> nanopowder encapsulated with a 10-20 nm-thick carbon layer consisting of graphitic and non-graphitic carbons (P/MoP<sub>2</sub>@C composite). The P/MoP<sub>2</sub>@C electrode exhibits the improved cycle retention and excellent high rate capability, delivering the high reversible capacity of 572 mAh g<sup>−1</sup> after 250 cycles at 1000 mA g<sup>−1</sup>. This improvement can be attributed to the graphitic/non-graphitic carbon coating layer, which reduces the charge transfer resistance and retains the stable solid electrolyte interphase (SEI) layer during cycling.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237280"},"PeriodicalIF":8.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912457","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

Intercalation pseudocapacitance of monolithic microporous carbon thin film scrolls and their battery type behavior 单片微孔碳薄膜卷的插层赝电容及其电池型性能

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-06 DOI: 10.1016/j.jpowsour.2025.237174

Sushanta K. Das , Lingaraj Pradhan , Jongwoo Hong , Seong Chan Jun , Bikash Kumar Jena

{"title":"Intercalation pseudocapacitance of monolithic microporous carbon thin film scrolls and their battery type behavior","authors":"Sushanta K. Das , Lingaraj Pradhan , Jongwoo Hong , Seong Chan Jun , Bikash Kumar Jena","doi":"10.1016/j.jpowsour.2025.237174","DOIUrl":"10.1016/j.jpowsour.2025.237174","url":null,"abstract":"<div><div>A distinct signature of intercalation pseudocapacitance is observed in doped carbon microfilm at highly negative anodic potential by patterning (scrolling) a thin, porous carbon film. Prominent redox peaks appear in alkaline solutions, which can be assigned to cation intercalation into a functionalized structural carbon matrix. The pseudocapacitance, in addition to electric double layer (EDL) capacitance, aligns with experimentally obtained ultra-high volumetric (257.42 Fcm<sup>−3</sup>) and areal (3.8 Fcm<sup>−2</sup>) capacitance, as well as capacity (76.70 mAh.g<sup>−1</sup> at 10 mA current) with high mass loading of 5 mg. The assembled metal-free symmetric device delivers an energy density of 8.228 mWh cm<sup>−3</sup> at a power density of 9.374 mW cm<sup>−3</sup> at 0.25 mA with a higher cycle life. Innovation of this work have its origin in the synthesis process that simultaneously exploits membrane casting and template assisted process to achieve hierarchical interconnected pores useful for large mass transport and ion storage. Importance of such structures further deepens due to their unique ion intercalation ability inside numerous micro grooves, providing pseudocapacitance in addition to electric double layer capacitance (EDLC). The unique design of a long-range ordered porous 3D conductive scaffold, patterned 2D and non-tortuous ionic paths with robust electronic conductivity, interconnected hierarchical pores, and a higher specific surface area (1001 m<sup>2</sup>g<sup>-1</sup>) are importance of as prepared thick electrode, that outperforms other carbon-based monolithic and 3D printed electrode systems to construct energy storage devices.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237174"},"PeriodicalIF":8.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905995","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

Improving energy conversion efficiency of ion-driven artificial muscles based on carbon nanotube yarn 提高基于碳纳米管纱的离子驱动人工肌肉能量转换效率

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-06 DOI: 10.1016/j.jpowsour.2025.237234

Jae Sang Hyeon , Qiong Wang , Sameh Tawfick , JeongA Lee , Kyle C. Smith , Mengmeng Zhang , Jong Woo Park , Gyu Hyeon Song , Zhong Wang , Shaoli Fang , Ray H. Baughman , Seon Jeong Kim

{"title":"Improving energy conversion efficiency of ion-driven artificial muscles based on carbon nanotube yarn","authors":"Jae Sang Hyeon , Qiong Wang , Sameh Tawfick , JeongA Lee , Kyle C. Smith , Mengmeng Zhang , Jong Woo Park , Gyu Hyeon Song , Zhong Wang , Shaoli Fang , Ray H. Baughman , Seon Jeong Kim","doi":"10.1016/j.jpowsour.2025.237234","DOIUrl":"10.1016/j.jpowsour.2025.237234","url":null,"abstract":"<div><div>While artificial muscles provide giant work and power densities compared to natural muscles, their reported energy conversion efficiencies have so far been low. We here demonstrate a tension optimization process (TOP) for fabricating coiled carbon nanotube artificial muscles having record efficiencies. These TOP muscles were made by applying about 20 times higher tensile stress during pre-coiling twist insertion than the tensile stress applied during coiling, resulting in high twist density and high spring index. The TOP muscles driven by the tetrabutylammonium cation provide 6.1 J/g contractile work, which is ∼152 times the maximum capability of human skeletal muscles, and 13.1 % contractile energy efficiency. In addition, the contractile energy efficiency of the TOP muscles driven by the bis(trifluoromethanesulfonyl)imide anion is maximized to 38.8 % by minimizing side redox reactions. In the case of full-cycle actuation, which considers the whole cycle of contraction and relaxation, we increased the full-cycle energy conversion efficiency of TOP muscles to 6.7 %, which is 4.5 times that previously reported for ion-driven artificial muscles.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237234"},"PeriodicalIF":8.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905996","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

Effect of carbon black properties on dry electrode processing of cathodes for lithium-ion batteries 炭黑性能对锂离子电池负极干电极加工的影响

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-06 DOI: 10.1016/j.jpowsour.2025.237243

Serkan Z. Damnali , Kimia Mazloumi , Berkant Tekin , Thomas Woehrle , Alice Hoffmann , Markus Hoelzle

{"title":"Effect of carbon black properties on dry electrode processing of cathodes for lithium-ion batteries","authors":"Serkan Z. Damnali , Kimia Mazloumi , Berkant Tekin , Thomas Woehrle , Alice Hoffmann , Markus Hoelzle","doi":"10.1016/j.jpowsour.2025.237243","DOIUrl":"10.1016/j.jpowsour.2025.237243","url":null,"abstract":"<div><div>Dry electrode processing of lithium-ion battery electrodes is one of the most promising technologies under development today to markedly reduce manufacturing costs of battery cells and to allow a sustainable production process in comparison to today's conventional wet electrode coating. A roll-to-roll dry coating calendar process, which uses polytetrafluoroethylene as an electrode binder, shows the greatest potential for a next-generation large-scale battery production. This work investigates the influence of carbon black additives having different physicochemical properties on the calendering step during coating process and the properties of electrodes produced as such. The carbon blacks, the composite granule intermediates and electrodes were characterized in view of mechanical and electronic properties. Single layer pouch cells were assembled to study the electrochemical characteristics. Aging tests revealed a capacity retention of 94 % after 450 cycles at C/2 for the best carbon black material being used. This work demonstrated that carbon blacks act not only as a conductive additive but also as a process aid for the calendering step, influencing the compressibility of the composite granules, resulting in adapted process parameters. Consequently, tailored carbon black properties are required to adapt electrode materials for dry coating for further improvement of this technology.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237243"},"PeriodicalIF":8.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905997","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

Optimization of interfacial contacts in all-solid-state lithium-metal batteries under pressure and temperature modulation and its effect on cycling performance 压力和温度调制下全固态锂金属电池界面接触优化及其对循环性能的影响

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-06 DOI: 10.1016/j.jpowsour.2025.237268

Jiatang Liu , Qingfeng Zhang , Yigang Feng , Wenxuan Xia , Jiang Yan , Zhihao Liu , Jianqiu Zhou

{"title":"Optimization of interfacial contacts in all-solid-state lithium-metal batteries under pressure and temperature modulation and its effect on cycling performance","authors":"Jiatang Liu , Qingfeng Zhang , Yigang Feng , Wenxuan Xia , Jiang Yan , Zhihao Liu , Jianqiu Zhou","doi":"10.1016/j.jpowsour.2025.237268","DOIUrl":"10.1016/j.jpowsour.2025.237268","url":null,"abstract":"<div><div>All-solid-state lithium metal batteries (ASSLIBs) are emerging as promising candidates for next-generation energy storage devices due to their high energy density and safety. However, poor interfacial contact between electrodes and solid-state electrolytes severely limits their performance. This study investigates the effects of pressure and temperature on the interfacial contact coefficient and battery performance in a lithium metal cathode/LiPON electrolyte/LCO anode system using a multi-physics field coupling model integrated with Persson's contact mechanics theory. Results show that a high contact coefficient reduces interfacial impedance, suppresses lithium dendrite formation, and achieves a capacity retention rate of 92 % after 500 cycles. In contrast, poor contact leads to rapid capacity degradation and accelerates solid electrolyte interface (SEI) film thickening. Increasing the temperature to 20 °C reduces the potential drop by 30 %, while high pressure (70 MPa) enhances the lithium concentration dynamics. This study elucidates the synergistic effects of interfacial contact, pressure, and temperature, thereby providing a theoretical foundation for the interface design of solid-state batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237268"},"PeriodicalIF":8.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912456","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

Bulk modification engineering of O3-NaNi0.5Mn0.5O2 layered cathode through dual-doping and synergism enables stable cycling of sodium-ion batteries 通过双掺杂和协同作用对O3-NaNi0.5Mn0.5O2层状阴极进行本体改性工程，实现钠离子电池的稳定循环

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-06 DOI: 10.1016/j.jpowsour.2025.237285

Yinuo Wei , Zhen Wang , Peng Gao , Yongming Zhu , Xudong Li

{"title":"Bulk modification engineering of O3-NaNi0.5Mn0.5O2 layered cathode through dual-doping and synergism enables stable cycling of sodium-ion batteries","authors":"Yinuo Wei , Zhen Wang , Peng Gao , Yongming Zhu , Xudong Li","doi":"10.1016/j.jpowsour.2025.237285","DOIUrl":"10.1016/j.jpowsour.2025.237285","url":null,"abstract":"<div><div>The O3-type NaNi<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> is a promising cathode material for sodium-ion batteries, however, it faces challenges such as complex structural changes, low sodium-ion diffusion rates, and irreversible oxygen loss, which result in lower initial capacity and rapid capacity decay. In this study, a bulk modification engineering is proposed to enhance the phase stability, improve sodium-ion diffusion rates, and reduce lattice oxygen loss through a Cu/Li co-doping strategy. Compared to O3-type NaNi<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub>, the Cu/Li tailored NaNi<sub>0.4</sub>Mn<sub>0.5</sub>Cu<sub>0.08</sub>Li<sub>0.02</sub>O<sub>2</sub> demonstrated improved electrochemical performance, with an initial capacity of up to 218.7 mAh g<sup>−1</sup>. After 200 cycles at a 1C rate, the capacity retention of the half-cell increased from 39.3 % to 63.8 %. This work illustrates that the co-doping strategy effectively and reliably stabilizes the material structure and enhances the performance of layered cathodes in sodium-ion batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237285"},"PeriodicalIF":8.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912458","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

Sc-doped SrCoO3-δ cathode with enhanced oxygen reduction reaction catalytic activity and stability for low -temperature solid oxide fuel cell 低温固体氧化物燃料电池中具有增强氧还原反应催化活性和稳定性的sc掺杂SrCoO3-δ阴极

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-05 DOI: 10.1016/j.jpowsour.2025.237247

Jie Gao , Hui Huang , Hang Chen , Dan Zheng , Yifan Yin , Hao Wang , Baoyuan Wang

{"title":"Sc-doped SrCoO3-δ cathode with enhanced oxygen reduction reaction catalytic activity and stability for low -temperature solid oxide fuel cell","authors":"Jie Gao , Hui Huang , Hang Chen , Dan Zheng , Yifan Yin , Hao Wang , Baoyuan Wang","doi":"10.1016/j.jpowsour.2025.237247","DOIUrl":"10.1016/j.jpowsour.2025.237247","url":null,"abstract":"<div><div>SrCoO<sub>3-δ</sub> (SCO) as a perovskite material delivers enormous potential in electrolyte application for solid oxide fuel cell (SOFC) due to its high mixed conductivity and excellent catalytic activity toward oxygen reduction reaction (ORR) activity. However, SCO is suffering from the drawback of bad thermal stability at high temperatures, which limits its practical development. In our study, the doping strategy of Sc<sup>3+</sup> is adapted to enhance the stability and promote the ORR catalytic activity of SCO cathode. The perovskite material SrSc<sub>χ</sub>Co<sub>1-χ</sub>O<sub>3-δ</sub> (SS<sub>χ</sub>CO, χ=0, 0.1, 0.2, 0.3) is synthesized by solid phase method and used as the cathode to fabricate the fuel cell. The crystal structure, oxygen transport performance, electrical conductivity and stability of the SS<sub>χ</sub>CO serial cathode are characterized. The results show that the Sc<sup>3+</sup> doping strategy can significantly improve the phase structure and electrochemical stability of SCO, and further facilitate ionic conduction. Among the SS<sub>χ</sub>CO serial cathode, the material with 0.2 Sc doping exhibits the lowest polarization impedance (0.35 Ω cm<sup>2</sup>) at 550 °C, highlighting its superior catalytic activity toward the ORR. Notably, the fuel cell fabricated from this optimized material achieves an impressive maximum power density of 748 mW cm<sup>−2</sup>.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237247"},"PeriodicalIF":8.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring oxide cathodes for Li-ion batteries: From mineral mining to active material production 探索锂离子电池的氧化物阴极：从矿物开采到活性物质生产

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-05 DOI: 10.1016/j.jpowsour.2025.236968

Muskan Srivastava, Anil Kumar M R, Sabbir Ahmed, Karim Zaghib

{"title":"Exploring oxide cathodes for Li-ion batteries: From mineral mining to active material production","authors":"Muskan Srivastava, Anil Kumar M R, Sabbir Ahmed, Karim Zaghib","doi":"10.1016/j.jpowsour.2025.236968","DOIUrl":"10.1016/j.jpowsour.2025.236968","url":null,"abstract":"<div><div>Electrification is a pivotal strategy for addressing the challenges of climate change. Li-ion batteries (LIBs) have emerged as an essential technology for driving this transition. Over the years, researchers have focused on diverse cathode chemistries to achieve high energy density, safety, and cost-efficiency. In this study, cobalt-, nickel-, and manganese-rich oxide cathodes were investigated with a focus on their crystal structures and strategies for improving their structural stability and electrochemical performance. This study also explored the journey from critical mineral ores to battery-grade material production. With the growing demand for energy, the demand for necessary minerals has surged. Although battery recycling is a promising mineral recovery technique, extraction techniques must be improved to make them more efficient and environmentally friendly. This paper also discusses various synthesis methods used to produce CAM, emphasizing the parameters that can influence the electrochemical performance of the cathode oxides. Furthermore, the environmental impact of these LIBs was reviewed to identify areas for improvement and solidify the position of electric vehicles as greener alternatives to internal combustion engine vehicles.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 236968"},"PeriodicalIF":8.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908042","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

Estimation of the discharge capacities and lithium-ion storage site of pitch-derived hard carbon obtained by different heat-treatment temperature 不同热处理温度下沥青衍生硬碳的放电容量和锂离子储存位置的估算

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-05 DOI: 10.1016/j.jpowsour.2025.237202

Yusuke Okumura , Hikaru Kobayashi , Ryuta Haga , Mikito Suto , Saki Nishida , Koji Nakabayashi , Seong-Ho Yoon , Jin Miyawaki

{"title":"Estimation of the discharge capacities and lithium-ion storage site of pitch-derived hard carbon obtained by different heat-treatment temperature","authors":"Yusuke Okumura , Hikaru Kobayashi , Ryuta Haga , Mikito Suto , Saki Nishida , Koji Nakabayashi , Seong-Ho Yoon , Jin Miyawaki","doi":"10.1016/j.jpowsour.2025.237202","DOIUrl":"10.1016/j.jpowsour.2025.237202","url":null,"abstract":"<div><div>Hard carbon (HC) is one of the most promising materials for the negative electrodes of lithium (Li)-ion batteries, as it shows unique electrochemical performance. HC has a structure with small crystalline size and a higher discharge (delithiation) capacity than graphite. However, because of its complex structure, the quantitative relationship between the discharge capacities and Li-ion storage sites was not clear though it is important to realize HC with higher capacity. In this study, heat-treatment temperature was adopted to control HC structure. The structural and compositional parameters of pitch-derived HC, such as the lattice constant, crystalline size, pore size, and hydrogen (H) content were closely analyzed. Then, the amounts of Li stored in pores and interlayer spaces, and at the edge H of HC were estimated as the discharge capacities for each site. The estimated discharge capacities corresponded to the experimental ones at 0–0.2 V, 0.2–0.9 V, and 0.9–2.5 V, respectively. Based on this estimation, it was suggested that the suitable pores for Li storage are relatively large, and especially are pores larger than 1.2 nm. The quantitative relationship between the discharge capacities and Li-ion storage sites revealed in this study will play a guiding role in improving the electrochemical properties of HC.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237202"},"PeriodicalIF":8.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905998","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

In situ synthesis of cellulose/carbon nanotubes/molybdenum disulfide composite with ultrahigh capacity and enhanced coulombic efficiency for sodium ion battery 钠离子电池用超高容量、高库仑效率纤维素/碳纳米管/二硫化钼复合材料的原位合成

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-05 DOI: 10.1016/j.jpowsour.2025.237262

Hao Ai , Weiyu Zhou , Qing Zhou , Yihang Hong , Xiang Li , Jiao Xie , Kaifeng Du

{"title":"In situ synthesis of cellulose/carbon nanotubes/molybdenum disulfide composite with ultrahigh capacity and enhanced coulombic efficiency for sodium ion battery","authors":"Hao Ai , Weiyu Zhou , Qing Zhou , Yihang Hong , Xiang Li , Jiao Xie , Kaifeng Du","doi":"10.1016/j.jpowsour.2025.237262","DOIUrl":"10.1016/j.jpowsour.2025.237262","url":null,"abstract":"<div><div>Sodium ion batteries (SIBs) have wide application prospects due to their low cost, high capacity and extended cycling life. However, there is a critical need for anode materials that exhibit ultrahigh capacity and outstanding initial coulombic efficiency (ICE) to further enhance SIB performance. Herein, cellulose/carbon nanotubes/molybdenum disulfide (CM/CNTs/MoS<sub>2</sub>) microspheres are initially synthesized via the in situ deposition of nano-MoS<sub>2</sub> onto cellulose/carbon nanotubes (CM/CNTs) microspheres. Subsequently, hard carbon/molybdenum disulfide (C/MoS<sub>2</sub>) composite anode is obtained through direct calcination of CM/CNTs/MoS<sub>2</sub> microspheres at 1350 °C. The carbon framework effectively mitigates volume expansion and prevents structural collapse of the C/MoS<sub>2</sub> anode during electrochemical testing. To enhance the ICE of C/MoS<sub>2</sub> composite anode, a weakly solvating electrolyte (WSE) strategy is developed, involving one cycle of high current-density discharge/charge in LiPF<sub>6</sub> electrolyte. Electrochemical impedance spectroscopy (EIS) tests reveal that the thin and compact solid-electrolyte interface (SEI) formed on the C/MoS<sub>2</sub>-WSE composite anode significantly reduce the reaction resistance (R<sub>ct</sub>). When paired with Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (NVP) cathode, the C/MoS<sub>2</sub>-SWE//NVP full cell demonstrates a reversible capacity of 276 mAh·g<sup>−1</sup> at a current density of 300 mA g<sup>−1</sup>, along with an ultra-high capacity retention of 97.3 % after 100 cycles.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237262"},"PeriodicalIF":8.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903894","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