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Unraveling Microporosity in Hard Carbons: Insights Into Sustainable Sodium-Ion Battery Materials 揭示硬碳中的微孔隙:对可持续钠离子电池材料的见解
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-24 DOI: 10.1002/batt.70430
Giorgia Greco, Alessandra Del Giudice, Mauro Falconieri, Serena Gagliardi, Flaminia Rondino, Maria Di Pea, Asia Patriarchi, Sonila Xhafa, Philipp Adelhelm, Sergio Brutti
{"title":"Unraveling Microporosity in Hard Carbons: Insights Into Sustainable Sodium-Ion Battery Materials","authors":"Giorgia Greco,&nbsp;Alessandra Del Giudice,&nbsp;Mauro Falconieri,&nbsp;Serena Gagliardi,&nbsp;Flaminia Rondino,&nbsp;Maria Di Pea,&nbsp;Asia Patriarchi,&nbsp;Sonila Xhafa,&nbsp;Philipp Adelhelm,&nbsp;Sergio Brutti","doi":"10.1002/batt.70430","DOIUrl":"https://doi.org/10.1002/batt.70430","url":null,"abstract":"<p>A comprehensive methodology is proposed for the quantitative analysis of microporosity in HC for SIBs anodes. SAXS coupled with the Ruland–Smarsly approach enables the detection of closed pores and accurate estimation of surface area and pore-size distribution beyond BET limitations. Two representative materials, a petroleum-based and a biowaste-derived HC, were compared to correlate nanostructural features with electrochemical behavior. Complementary XRD, Raman spectroscopy, and SEM support the SAXS interpretation by revealing differences in crystallinity and morphology. The results show that sustainable biowaste-derived carbons achieve performance comparable to commercial ones. This SAXS-based framework provides a reproducible route to probe nanoscale disorder in carbon anodes and guides the rational design of efficient and low-impact materials for next-generation SIBs.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/batt.70430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Entropy Electrolytes: Advancing Low-Temperature Lithium Batteries Toward Extreme Environments 高熵电解质:将低温锂电池推向极端环境
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-19 DOI: 10.1002/batt.70435
Haodong Zhou, Junze Guo, Weifeng Zou, Xuyin Zhu, Yuhang Jiang, Tiefeng Li
{"title":"High-Entropy Electrolytes: Advancing Low-Temperature Lithium Batteries Toward Extreme Environments","authors":"Haodong Zhou,&nbsp;Junze Guo,&nbsp;Weifeng Zou,&nbsp;Xuyin Zhu,&nbsp;Yuhang Jiang,&nbsp;Tiefeng Li","doi":"10.1002/batt.70435","DOIUrl":"https://doi.org/10.1002/batt.70435","url":null,"abstract":"<p>With the growing demand for lithium batteries in extreme environments such as high-latitude and high-altitude regions, their reliable operation has become increasingly important. The electrolyte, as a key component of batteries, plays a critical role in determining overall battery performance. Under low-temperature conditions, electrolyte failure has become a major bottleneck limiting the practical operation of batteries. Conventional low-temperature electrolyte design strategies mainly rely on solvent-system optimization, regulation of the solid electrolyte interphase (SEI), and the construction of localized high-concentration electrolytes. However, these approaches still struggle to fully overcome key low-temperature challenges, including reduced ionic conductivity, sluggish Li<sup>+</sup> desolvation kinetics, and SEI degradation. In recent years, the high-entropy strategy has emerged as an effective multicomponent approach for optimizing low-temperature electrolytes. This review systematically summarizes the application of the high-entropy strategy in liquid, inorganic solid, and solid polymer electrolyte systems, with particular emphasis on its role in regulating solvation structures, low-temperature fluidity, ionic conductivity, SEI formation, and low-temperature electrochemical performance. It is expected that this work will provide useful insights into the rational design of advanced high-entropy electrolytes for lithium batteries operating at low temperatures.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Operando Visualization of Dynamic Lithium and Electrolyte Transport in 18650-Type Lithium-Ion Cells 18650型锂离子电池中动态锂离子和电解质传输的操作可视化
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-19 DOI: 10.1002/batt.70452
Dominik Petz, Martin J. Mühlbauer, Ulf Garbe, Michael Schulz, Anatoliy Senyshyn
{"title":"Operando Visualization of Dynamic Lithium and Electrolyte Transport in 18650-Type Lithium-Ion Cells","authors":"Dominik Petz,&nbsp;Martin J. Mühlbauer,&nbsp;Ulf Garbe,&nbsp;Michael Schulz,&nbsp;Anatoliy Senyshyn","doi":"10.1002/batt.70452","DOIUrl":"https://doi.org/10.1002/batt.70452","url":null,"abstract":"<p>Details of the nonlinear volume changes of the electrode materials in commercial 18650-type cylindrical cells, particularly in relation to the electrolyte distribution, have been investigated on a macroscopic level. An experimental study employed optical micrometry, cold neutron radiography and thermal neutron computed tomography to investigate the interior of two cylinder-type lithium-ion batteries. Anisotropic cell breathing was correlated with lithium transport and electrolyte redistribution throughout the cell volume during cell operation. The obtained results revealed a complex interaction of the cell electrode–electronic subsystem, opening a broad field of research with potential impact on reducing accelerated cell aging and increasing cell lifetime and safety.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/batt.70452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Realizing Safe Sodium Metal Batteries Through the Advanced Composite Na Metal Anode: Developments and Perspectives 利用新型复合金属钠负极实现安全钠金属电池的研究进展与展望
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-19 DOI: 10.1002/batt.70376
Tianzhen Ren, Zhimin Ding, Lu-Kang Zhao, Xiran Zhao, Xuanchen Wang, Zhaomeng Liu, Xuan-Wen Gao, Wen-Bin Luo
{"title":"Realizing Safe Sodium Metal Batteries Through the Advanced Composite Na Metal Anode: Developments and Perspectives","authors":"Tianzhen Ren,&nbsp;Zhimin Ding,&nbsp;Lu-Kang Zhao,&nbsp;Xiran Zhao,&nbsp;Xuanchen Wang,&nbsp;Zhaomeng Liu,&nbsp;Xuan-Wen Gao,&nbsp;Wen-Bin Luo","doi":"10.1002/batt.70376","DOIUrl":"https://doi.org/10.1002/batt.70376","url":null,"abstract":"<p>Sodium metal batteries, with their high theoretical specific capacity and energy density, are ideal candidates for long-duration applications. As progress in Na metal batteries continues, the demands on the anode have become increasingly stringent. However, the high reactivity of Na metal poses a significant safety challenge that limits the application of Na metal batteries. During battery cycling, Na ions continuously nucleate, deposit, and eventually form Na dendrites on the anode side. Therefore, understanding the formation mechanism of Na dendrites and the measures to prevent them plays a direct role in the further application of Na metal batteries. This review aims to enhance the understanding of the relationship between the fundamental principles of Na metal anode failure and improved design. The review focuses on the analysis and summary of the latest Na metal anodes based on commonly used carbon-based and metal-based matrix materials, and on optimizing the anode against dendrite formation mechanisms. Additionally, it provides a perspective on the development of Na metal anodes. A deep understanding of anode optimization engineering will pave the way for the development of practical, safe, and durable high-performance Na metal batteries.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Understanding the Role of Fe/Mn Ratio on the Structural and Electrochemical Performance of LiMnxFe1−xPO4 Nanocrystals Fe/Mn比对LiMnxFe1−xPO4纳米晶体结构和电化学性能影响的研究
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-18 DOI: 10.1002/batt.70455
Renfei Cheng, Yanzhuang Wang, Changji Li, Xiaohui Wang
{"title":"Understanding the Role of Fe/Mn Ratio on the Structural and Electrochemical Performance of LiMnxFe1−xPO4 Nanocrystals","authors":"Renfei Cheng,&nbsp;Yanzhuang Wang,&nbsp;Changji Li,&nbsp;Xiaohui Wang","doi":"10.1002/batt.70455","DOIUrl":"https://doi.org/10.1002/batt.70455","url":null,"abstract":"<p>The recent commercialization of next-generation blade batteries, as exemplified by BYD’s second-generation systems, has reaffirmed the relevance of LiFePO<sub>4</sub>-based cathodes for high-safety lithium-ion batteries, yet their limited energy density remains a key bottleneck. Partial substitution of Fe with Mn to form LiMn<sub><i>x</i></sub>Fe<sub>1−<i>x</i></sub>PO<sub>4</sub> is considered an effective strategy to enhance energy density, but is hindered by Jahn–Teller distortion of Mn (III). Although Fe/Mn solid-solution engineering has been widely explored, considerable inconsistency persists regarding the optimal Fe/Mn ratio, with conflicting reports of 4:6, 5:5, and 6:4. Here, nanocrystalline LiMn<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>PO<sub>4</sub> solid solutions are synthesized by a microwave-assisted hydrothermal route, and their composition-dependent electrochemical behavior and phase transition mechanisms are elucidated. A non-monotonic dependence on Fe/Mn ratio is identified, with the equimolar composition (Fe/Mn = 1:1) delivering the optimal balance of energy density, polarization, and cycling stability. A transition from biphasic to solid-solution-like behavior is revealed by in situ X-ray diffraction at this composition, enabling improved structural stability and reaction kinetics. These results provide a systematic composition-dependent understanding of how Fe/Mn stoichiometry regulates reaction kinetics and apparent phase-transition behavior in nanocrystalline LiMn<sub><i>x</i></sub>Fe<sub>1−<i>x</i></sub>PO<sub>4</sub>/C, offering guidance for the rational design of high-energy-density olivine cathodes.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Front Cover: Paper-Based Printed Supercapacitor Loaded With Carbon Black and Gold Nanoparticles for Sustainable Energy Storage Devices (Batteries & Supercaps 9/2026) 封面:装有炭黑和金纳米颗粒的纸质印刷超级电容器,用于可持续能源存储设备(电池和超级电容器9/2026)
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-18 DOI: 10.1002/batt.70471
Achref Chebil, Vincenzo Mazzaracchio, Daniele Cecchetti, Elena Palmieri, Sebastian Vecino-Mantilla, Giorgio Pettinari, Libu Manjakkal, Fabiana Arduini
{"title":"Front Cover: Paper-Based Printed Supercapacitor Loaded With Carbon Black and Gold Nanoparticles for Sustainable Energy Storage Devices (Batteries & Supercaps 9/2026)","authors":"Achref Chebil,&nbsp;Vincenzo Mazzaracchio,&nbsp;Daniele Cecchetti,&nbsp;Elena Palmieri,&nbsp;Sebastian Vecino-Mantilla,&nbsp;Giorgio Pettinari,&nbsp;Libu Manjakkal,&nbsp;Fabiana Arduini","doi":"10.1002/batt.70471","DOIUrl":"https://doi.org/10.1002/batt.70471","url":null,"abstract":"<p><b>The Front Cover</b> illustrates a newly developed flexible paper-based supercapacitor. Office paper serves as the substrate for the screen-printing of carbon black/gold nanoparticle-modified graphite electrodes. A paper separator impregnated with PVA/KOH electrolyte is sandwiched between the two electrodes, resulting in a flexible and sustainable energy storage device. More information can be found in the Research Article by F. Arduini and co-workers (DOI: 10.1002/batt.70397).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/batt.70471","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical Strategies for Closed-Loop Regeneration and Upcycling of Spent Batteries 废旧电池闭环再生升级的电化学策略
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-18 DOI: 10.1002/batt.70449
Panyu Ren, Shen Liu, Dejia Liu, Sundas Iqbal, Jin Chai, Peng Li
{"title":"Electrochemical Strategies for Closed-Loop Regeneration and Upcycling of Spent Batteries","authors":"Panyu Ren,&nbsp;Shen Liu,&nbsp;Dejia Liu,&nbsp;Sundas Iqbal,&nbsp;Jin Chai,&nbsp;Peng Li","doi":"10.1002/batt.70449","DOIUrl":"https://doi.org/10.1002/batt.70449","url":null,"abstract":"<p>The rapid growth of electric vehicles and portable electronic devices has substantially increased the demand for recycling end-of-life batteries. Although traditional pyrometallurgical and hydrometallurgical recycling technologies are industrially established, their broader application is constrained by high energy consumption, long processing times, and severe secondary pollution. Recently, electrochemical strategies have emerged as cleaner and more selective alternatives. By utilizing electrons as the primary reagent, these methods can provide controllable reaction selectivity and environmental compatibility under relatively mild conditions. This review summarizes recent advances in electrochemical strategies for the closed-loop regeneration and upcycling of spent batteries, covering electrochemical leaching, selective electrodeposition, direct cathode/anode regeneration, and functional upcycling. Particular attention is given to transforming degraded battery components into regenerated electrodes, electrocatalysts, water treatment, electromagnetic absorption materials, flexible biosensors, and next-generation energy storage materials. We further discuss key challenges and future directions such as mitigating manual risks through battery passports and AI-driven robots. This review aims to provide theoretical guidance and a forward-looking perspective for developing the next generation of low-carbon battery recycling technologies.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stable High-Rate Sodium Metal Batteries at Room and Low Temperature Enabled by Mixed Ion/Electron-Conducting Interphase Engineering 混合离子/电子传导界面工程实现室温和低温下稳定的高倍率钠金属电池
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-18 DOI: 10.1002/batt.70453
Zi-Jian Chen, Yang Yang, Hui Guo, De-Shan Bin, Lin Liu
{"title":"Stable High-Rate Sodium Metal Batteries at Room and Low Temperature Enabled by Mixed Ion/Electron-Conducting Interphase Engineering","authors":"Zi-Jian Chen,&nbsp;Yang Yang,&nbsp;Hui Guo,&nbsp;De-Shan Bin,&nbsp;Lin Liu","doi":"10.1002/batt.70453","DOIUrl":"https://doi.org/10.1002/batt.70453","url":null,"abstract":"<p>Sodium metal batteries (SMBs) with high energy density showed great promise for various applications, but they are plagued by uneven and low-reversibility sodium plating/stripping, particularly when fast-charging capability at subzero temperatures is pursued. Here, we present a facile method to modulate the Al foil by constructing a mixed ion/electron-conducting (MIEC) interfacial layer, which takes Na<sub>15</sub>Sn<sub>4</sub>/NaF MIEC interphase as an example, for stable and high-rate SMBs at room and low temperature. The Na<sub>15</sub>Sn<sub>4</sub>/NaF MIEC interfacial layer can homogenize interfacial Na<sup>+</sup>/e<sup>−</sup> distribution, enhance the sodiophilicity, and facilitate interfacial ion transport kinetics, thus inducing favorable Na deposition behavior. Therefore, the asymmetric cells display an average Coulombic efficiency of 99.5% over 800 cycles at 3 mA cm<sup>−2</sup>/3 mAh cm<sup>−2</sup>; the symmetric cells achieve a small overpotential (20 mV at 3 mA cm<sup>−2</sup>) for 1800 h. Moreover, the Na<sub>15</sub>Sn<sub>4</sub>/NaF@Al/Na‖Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> SMBs can deliver extraordinary rate capability and superb stability (95.7% capacity retention after 1800 cycles at 10 C). More impressively, at the harsh condition of −40 °C, the full cells display outstanding cycling stability with a capacity retention of 97.4% at 1 C for 1700 cycles. This work envisions new perspectives on manipulating interfacial properties of current collectors for high-performance SMBs.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Value Recycling and Regeneration of Spent LiFePO4 Batteries: Recent Advances, Mechanisms, and Perspectives 废旧LiFePO4电池的高价值回收与再生:最新进展、机制与展望
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-18 DOI: 10.1002/batt.70447
Ke Chen, Haoran Lang, Dewei Zheng, Bo Zhang, Xuan Zhao, Pengwei Li, Xiaoning Xia, Kai Zhu, Jun Wang, Dianxue Cao
{"title":"High-Value Recycling and Regeneration of Spent LiFePO4 Batteries: Recent Advances, Mechanisms, and Perspectives","authors":"Ke Chen,&nbsp;Haoran Lang,&nbsp;Dewei Zheng,&nbsp;Bo Zhang,&nbsp;Xuan Zhao,&nbsp;Pengwei Li,&nbsp;Xiaoning Xia,&nbsp;Kai Zhu,&nbsp;Jun Wang,&nbsp;Dianxue Cao","doi":"10.1002/batt.70447","DOIUrl":"https://doi.org/10.1002/batt.70447","url":null,"abstract":"<p>The rapidly growing deployment of electric vehicles and energy storage systems is generating increasing quantities of spent LiFePO<sub>4</sub> (LFP) batteries and creating an urgent need for environmentally sound and economically viable recycling. Compared with Ni- and Co-rich cathodes, spent LFP has a lower intrinsic resource value, which reduces the profitability of conventional pyrometallurgical and hydrometallurgical routes and limits their suitability for closed-loop utilization. This review summarizes recent advances in the high-value recycling and regeneration of spent LFP batteries, with an emphasis on retirement trends, degradation mechanisms, recycling challenges, and advanced regeneration strategies. Conventional pyrometallurgical and hydrometallurgical recovery routes are first compared in terms of efficiency, cost, environmental burden, and scalability. Recent progress in direct regeneration is then discussed, including lithium replenishment, lattice repair, carbon-coating reconstruction, hydrothermal treatment, and molten-salt-assisted regeneration. Upgraded regeneration strategies, including defect modulation, doping, surface engineering, micro/nanoscale structural optimization, cross-system conversion, and transformation into multifunctional materials, are also highlighted. Finally, key barriers associated with feedstock heterogeneity, impurity control, process economics, environmental sustainability, and industrial standardization are identified. This review provides systematic insights into green, scalable, and value-added recycling pathways for spent LFP batteries.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 9","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Towards Battery Like Energy Density of MnO2 Electrodes in Water-in-Salt Electrolyte Environments 盐水电解质环境下二氧化锰电极类电池能量密度研究
IF 4.5 4区 材料科学
Batteries & Supercaps Pub Date : 2026-08-16 DOI: 10.1002/batt.70445
Arya Das, Satyaswini Sahu, Megha Dash, Mamata Mohapatra
{"title":"Towards Battery Like Energy Density of MnO2 Electrodes in Water-in-Salt Electrolyte Environments","authors":"Arya Das,&nbsp;Satyaswini Sahu,&nbsp;Megha Dash,&nbsp;Mamata Mohapatra","doi":"10.1002/batt.70445","DOIUrl":"https://doi.org/10.1002/batt.70445","url":null,"abstract":"<p>Enhancing the energy density of supercapacitors (SCs) is essential for advancing their capabilities, broadening their range of applications, and making them more competitive with other energy storage technologies like batteries. Although aqueous SCs are emerging as a desirable technology, their energy density is severely restricted by the low thermodynamic stability window of aqueous electrolytes. Achieving a high-energy supercapacitor that leverages the benefits of an aqueous electrolyte is both highly desirable and challenging. In this study, we address this challenge by utilizing a water-in-salt 17 m NaClO<sub>4</sub> (WiS) electrolyte that allows an operational window of 2.87 V, coupled with engineered potassium-incorporated manganese dioxide (K-MnO<sub>2</sub>) electrode. Our research demonstrates that the insertion of potassium ions (K<sup>+</sup>) into manganese dioxide (MnO<sub>2</sub>) significantly enhances its pseudocapacitive behavior via the Mn<sup>3+</sup>/Mn<sup>4+</sup> redox mechanism. This enhancement, facilitated by the wide potential range provided by the electrolyte, results in a high areal capacitance of 1051 mF/cm<sup>2</sup> (294.3 F/g). Furthermore, the asymmetric supercapacitor, featuring an activated carbon negative electrode and K-MnO<sub>2</sub> positive electrode, operates at 2.3 V, achieving an energy density of 59.5 Wh/kg. This study underscores the critical role of well-defined electrochemical interfaces in enhancing the energy density of SCs. It also offers a powerful approach to utilizing WiS electrolytes, enabling wide-window operation of electrodes in aqueous SCs to achieve battery-like energy densities.</p>","PeriodicalId":132,"journal":{"name":"Batteries & Supercaps","volume":"9 8","pages":""},"PeriodicalIF":4.5,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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