Journal of Materials Chemistry A最新文献

CdS nanofeathers enable efficient electron-mediator-free photocatalytic regeneration of coenzyme NAD(P)H via direct electron-proton coupling CdS纳米羽毛通过直接电子-质子耦合实现了辅酶NAD(P)H的高效无电子介质光催化再生

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta03036f

Yao Chai, Leyi Zhao, Zirui Pang, Liang Wan, Heng Jiang, Chi Chung Tsoi, Yu Du, Huaping Jia, Yujiao Zhu, Detao Liu, Mingjie Li, Fengjia Xie, Guangya Zhou, Xuming Zhang

{"title":"CdS nanofeathers enable efficient electron-mediator-free photocatalytic regeneration of coenzyme NAD(P)H via direct electron-proton coupling","authors":"Yao Chai, Leyi Zhao, Zirui Pang, Liang Wan, Heng Jiang, Chi Chung Tsoi, Yu Du, Huaping Jia, Yujiao Zhu, Detao Liu, Mingjie Li, Fengjia Xie, Guangya Zhou, Xuming Zhang","doi":"10.1039/d5ta03036f","DOIUrl":"https://doi.org/10.1039/d5ta03036f","url":null,"abstract":"Photocatalytic regeneration of coenzyme NAD(P)H is essential for energy metabolism and reductive biosynthesis. Traditional systems depend on indirect electron-coupled proton transfer with precious metal-based electron mediators, adding complexity and cost. Here, we demonstrate that CdS nanofeather photocatalysts can achieve visible-light photocatalytic coenzyme NAD(P)H regeneration without electron mediators. Under visible-light irradiation, the NAD+ conversion of the CdS nanofeather photocatalyst reached 66.0% (1h), showing 70.5% selectivity for the physiologically active product 1,4-NADH. When electron mediators are used, the NAD+ conversion is 72.7% (1h). Furthermore, the expansion of substrate types indicates that another coenzyme, NADPH, also can be effectively regenerated without the assistance of an electron mediator. The unique morphology facilitates efficient charge separation and rapid migration, satisfying the electron concentration demands for NAD(P)H regeneration. Mechanistic studies show that the process involves stepwise electron-proton-electron transfer characterized by direct electron-coupled proton transfer. NADH is produced via the pathway NAD+ → NAD• → enol-NADH•+ → enol-NADH → 1,4-NADH, fundamentally differing from the indirect electron transfer mechanism that relies on electron mediators. This work introduces visible-light photocatalytic coenzyme NAD(P)H regeneration without electron mediators, achieving competitive conversion.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"12 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Demystifying charge-compensation mechanisms and Oxygen dimerization in Li-rich Li2NiO3 cathodes 富锂Li2NiO3阴极的电荷补偿机制和氧二聚化

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta03794h

Hrishit Banerjee, Clare P. Grey, Andrew James Morris

{"title":"Demystifying charge-compensation mechanisms and Oxygen dimerization in Li-rich Li2NiO3 cathodes","authors":"Hrishit Banerjee, Clare P. Grey, Andrew James Morris","doi":"10.1039/d5ta03794h","DOIUrl":"https://doi.org/10.1039/d5ta03794h","url":null,"abstract":"Li-rich cathodes are gaining popularity for Li-ion batteries due to their higher capacity compared to standard layered cathodes. However, the redox mechanisms in these materials are still not clear, nor is the origin of the extra capacity observed experimentally. We investigate the elusive charge-compensation mechanisms and their impact on potential oxygen-dimer formation in a recently synthesised Li-rich cathode, Li2NiO3. Using state-of-the-art ab initio dynamical mean-field theory, we show that the excess capacity in Li2NiO3 comes from a combined Ni and O redox, unlike its layered counterpart LiNiO2, where O redox predominates. Moreover, we demonstrate O dimer formation via a plot of the electron localisation function for the first time, and attribute this formation to the higher oxidation state of O, even in the pristine material. Finally, we show that Li migration to the interlayer tetrahedral sites at the end of charge is potentially unlikely due to the end configuration being higher in energy and the stabilisation of the parent structure caused by O dimerization. This microscopic understanding leads to better design of Li-rich high Ni-content cathodes with higher capacity and minimal degradation.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"46 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Doping and thermoelectric properties of the zero-dimensional inorganic halide perovskite derivative, Cs₃Cu₂I₅ 零维无机卤化物钙钛矿衍生物Cs₃Cu₂I₅的掺杂和热电性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta02695d

Ceyla Asker, Candida Pipitone, Federica Ursi, Kan Chen, Antonio Gaetano Ricciardulli, Eugenio Suena Galindez, Sally Luong, Paolo Samorì, Mike Reece, Antonino Martorana, Francesco Giannici, Oliver Fenwick

{"title":"Doping and thermoelectric properties of the zero-dimensional inorganic halide perovskite derivative, Cs₃Cu₂I₅","authors":"Ceyla Asker, Candida Pipitone, Federica Ursi, Kan Chen, Antonio Gaetano Ricciardulli, Eugenio Suena Galindez, Sally Luong, Paolo Samorì, Mike Reece, Antonino Martorana, Francesco Giannici, Oliver Fenwick","doi":"10.1039/d5ta02695d","DOIUrl":"https://doi.org/10.1039/d5ta02695d","url":null,"abstract":"Halide perovskites have been considered as promising thermoelectric materials due to their unusual combination of good charge mobility and ultralow thermal conductivity. Low dimensional halide perovskite derivatives (0D, 1D and 2D) have been predicted to have high thermoelectric figure of merit due to quantum confinement effects, but this class of metal halides has been under-explored experimentally. Here, we investigate the thermoelectric properties of the all-inorganic 0D halide perovskite, Cs3Cu2I5, doped with barium. Ba-doped pellets were fabricated by solid state synthesis. An enhancement of electrical conductivity by >3 orders of magnitude was achieved upon doping and extended X-ray absorption fine structure measurements indicate that Ba substituted Cs on the smaller of the two A-sites. We show that thermal conductivity is in the ultralow regime and decreases with doping, consistent with increased scattering from defects. The positive Seebeck coefficient of + 2400 ± 60 μV.K-1 for Cs3Cu2(1--x)BaxI5 (x = 0.1) confirmed p-type doping. To our knowledge, this is the first study on substitutional doping of a 0D halide perovskite to improve the thermoelectric figure of merit.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"697 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A Simple Surface Engineering Approach to Enhance the Schottky Barrier of Polymer Dielectrics for Superior Energy Storage Performance 一种简单的表面工程方法来增强聚合物介电体的肖特基势垒，以获得卓越的储能性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta03960f

Tao Liu, Yang Liu, Jin Qian, Jiajia Ren, Jiwei Zhai, Tao Zhou, Yao Zhou, Gui-Wei Yan, Diming Xu, Wenfeng Liu, Di Zhou

{"title":"A Simple Surface Engineering Approach to Enhance the Schottky Barrier of Polymer Dielectrics for Superior Energy Storage Performance","authors":"Tao Liu, Yang Liu, Jin Qian, Jiajia Ren, Jiwei Zhai, Tao Zhou, Yao Zhou, Gui-Wei Yan, Diming Xu, Wenfeng Liu, Di Zhou","doi":"10.1039/d5ta03960f","DOIUrl":"https://doi.org/10.1039/d5ta03960f","url":null,"abstract":"To address the escalating demands for energy storage and conversion in harsh environments, polymer dielectrics, which are critical in electrostatic capacitors, must function effectively under high electric fields and elevated temperatures. However, low discharge energy density (Ud) and performance degradation at elevated temperatures present significant barriers to further application and development of polymer dielectrics. This paper describes a simple method to improve the high-temperature breakdown strength (Eb) and energy storage performance (ESP) of polyethylene terephthalate (PET) film. A wide bandgap SiO2 inorganic nanolayer is deposited onto PET surface using a one-step immersion coating process. The wide bandgap layer effectively reduces the charge injected into the polymer dielectric and conductivity of dielectric surface. At 25 °C, coated films exhibit significant Eb (~ 728.4 MV·m-1) and high Ud (~ 9.1 J·cm-3), along with excellent charge-discharge efficiency (η) (~ 88.9 %). At 125 °C, the Eb of PET improves significantly from 509.8 MV·m-1 to 623.3 MV·m-1, with a corresponding maximum Ud of 6.6 J·cm-3. This work introduces a practical and efficient interface design strategy for high-temperature polymer dielectric materials.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"31 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Exploiting S22−/S2− redox chemistry in pseudo-layered chain-structured titanium trisulfide cathodes for high-energy magnesium–lithium hybrid ion batteries 高能镁锂混合离子电池准层状链结构三硫化钛阴极的S22−/S2−氧化还原化学研究

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta02988k

Pengcheng Jing, Atsushi Inoishi, Eiichi Kobayashi, Chengcheng Zhao, Yisong Han, Peng Ren, Isaac Abrahams, Duncan H. Gregory

{"title":"Exploiting S22−/S2− redox chemistry in pseudo-layered chain-structured titanium trisulfide cathodes for high-energy magnesium–lithium hybrid ion batteries","authors":"Pengcheng Jing, Atsushi Inoishi, Eiichi Kobayashi, Chengcheng Zhao, Yisong Han, Peng Ren, Isaac Abrahams, Duncan H. Gregory","doi":"10.1039/d5ta02988k","DOIUrl":"https://doi.org/10.1039/d5ta02988k","url":null,"abstract":"Magnesium–lithium hybrid ion batteries (MLIBs) offer a compelling alternative to conventional lithium-ion batteries (LIBs) due to their enhanced safety, abundant magnesium resources, and high theoretical capacities. However, the lack of high-capacity cathode materials has hindered their widespread application. In this study, we explore the potential of pseudo-layered titanium trisulfide (TiS3) as a novel cathode material for MLIBs. TiS3 features a chain-like structure with both S22− and S2− species, providing abundant ion storage sites and leveraging an S22−/S2− redox mechanism. The TiS3 electrode achieves a maximum reversible capacity of ca. 381 mA h g−1, corresponding to a high energy density of ca. 483 W h kg−1, along with robust rate capability (ca. 213 and 138 mA h g−1 at 1000 mA g−1, 2.69C, and 3000 mA h g−1, 8.06C, respectively) and extended cycling stability (ca. 160 mA h g−1 after 1700 cycles at 2.69C). Mechanistic insights obtained via ex situ X-ray absorption spectroscopy (XAS) confirm the S22−/S2− redox mechanism, while in operando powder X-ray diffraction (PXRD) reveals phase transitions linked to intercalation-induced changes in local structure. This work underscores the promise of anionic redox chemistry in inorganic intercalation compounds and offers a new pathway for designing high-performance cathode materials for next-generation MLIBs and beyond.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"7 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nanoconfinement-Driven Interface Boosts Zinc Deposition Kinetics toward Dendrite-Free Zinc Anodes 纳米约束驱动界面促进锌沉积动力学向无枝晶锌阳极

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta03938j

Qing Wen, Chen Tian, Chao Sun, Yu-jing Chen, Ruihan Ji, Rude Cui, He-Zhang Chen, Lin-bo Tang, Xiahui Zhang, Junchao Zheng, Jiafeng Zhang

{"title":"Nanoconfinement-Driven Interface Boosts Zinc Deposition Kinetics toward Dendrite-Free Zinc Anodes","authors":"Qing Wen, Chen Tian, Chao Sun, Yu-jing Chen, Ruihan Ji, Rude Cui, He-Zhang Chen, Lin-bo Tang, Xiahui Zhang, Junchao Zheng, Jiafeng Zhang","doi":"10.1039/d5ta03938j","DOIUrl":"https://doi.org/10.1039/d5ta03938j","url":null,"abstract":"Dendrite growth and side reactions are two major obstacles for aqueous zinc-ion batteries (AZIBs) in field of stationary energy storage. While constructing a corrosion-resistant interface is an effective approach to stabilize zinc anode, slow deposition kinetics at this interface remains a significant challenge. Herein, we construct an ion-conducting Zn-based MOF (Zn-BTC) layer on the zinc anode by an anodic growth method. The Zn-BTC layer effectively mitigates interfacial corrosion by physically separating zinc from the electrolyte. Moreover, the multiscale nanopore architecture of Zn-BTC creates nanoconfined environments that manipulate ion transport behaviors and thus boost deposition kinetics. As a result, the Zn-BTC@Zn symmetric cell achieves ultra-stable cycle life of over 3000 h and low polarization voltage of 30 mV at 1 mA cm-2 and 1 mAh cm-2, compared to Bare Zn (less than 300 h, 42 mV), respectively. Furthermore, the Zn-BTC@Zn//NH4V4O10 full cell maintains a capacity of 91.5 mAh g-1 after 10000 cycles at 3 A g-1, with a capacity retention rate of 65.8%. This work proposes a new interfacial layer with rich multiscale pore structure, which can effectively inhibit the growth and corrosion of zinc dendrites and can also be applied to other metal anodes.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"1 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Lithophilic conductive oxide-introduced dual-substrate deposition for high current density lithium metal batteries 高电流密度锂金属电池中引入的亲石性导电氧化物双衬底沉积

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta03025k

Juntao Si, Yida Wang, Jingchao Xiao, Yunyong Hu, B. C. Pan, Chunhua Chen

{"title":"Lithophilic conductive oxide-introduced dual-substrate deposition for high current density lithium metal batteries","authors":"Juntao Si, Yida Wang, Jingchao Xiao, Yunyong Hu, B. C. Pan, Chunhua Chen","doi":"10.1039/d5ta03025k","DOIUrl":"https://doi.org/10.1039/d5ta03025k","url":null,"abstract":"Lithium (Li) metal anodes hold tremendous potential for high-energy storage applications, yet their practical implementation is severely hindered by the formation of Li dendrites, which compromise both battery lifespan and safety. In this study, yttrium-barium-copper-oxide (YBa2Cu3O7, YBCO) is introduced as a separator modifier due to its outstanding conductivity and strong Li⁺ adsorption affinity, thus YBCO effectively reduces local current density on Li anode and promotes uniform Li deposition through a two-dimensional growth pattern on YBCO. Consequently, compared to the cells with a pristine PP separator, those incorporating modified separators lead to an extended lifespan in both Li/Li symmetric cells (2800 h) and Li/Cu half-cells (400 h). Moreover, the cycling stability of Li metal batteries is greatly improved, with LiFePO₄/Li full cells retaining 82% of highest capacity even after 600 cycles at 5 C. This study presents a practical and efficient approach to separator modification, paving the way for a highly desired dendrite-free Li anode and the development of long-lasting Li metal batteries, especially under a high current density.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"109 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Amorphous oxyhalide solid electrolytes with improved ionic conductivity and reductive stability for all-solid-state batteries 非晶氧卤化物固体电解质，改善离子电导率和还原稳定性，用于全固态电池

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta03791c

Shufeng Song, Fengkun Wei, Wei Xue, Yanming Cui, Zhixu Long, Hongyang Shan, Ning Hu

{"title":"Amorphous oxyhalide solid electrolytes with improved ionic conductivity and reductive stability for all-solid-state batteries","authors":"Shufeng Song, Fengkun Wei, Wei Xue, Yanming Cui, Zhixu Long, Hongyang Shan, Ning Hu","doi":"10.1039/d5ta03791c","DOIUrl":"https://doi.org/10.1039/d5ta03791c","url":null,"abstract":"Halides have emerged as a promising class of solid electrolytes (SEs), exhibiting superior ionic conductivities comparable to those of state-of-the-art sulfide-based SEs, while also offering oxidative stability comparable to oxide-based SEs, making them suitable for high-energy-density all-solid-state batteries (ASSBs). Although extensive research has been conducted on cubic close-packed (ccp) and hexagonal close-packed (hcp) halide-based SEs, oxyhalide SEs have recently attracted significant attention owing to their disordered amorphous structures and high ionic conductivities. However, the intrinsic reductive instability of halides and limitations associated with conventional oxygen sources have impeded their practical application. Herein, we report a novel series of amorphous oxyhalide SEs, Li4xLaxTa1-xO2xCl5-2x (x = 0.25, 0.35, and 0.5), wherein lithium lanthanate (LiLaO2) is strategically employed as an oxygen source instead of the conventional Li2O. Using complementary X-ray diffraction, scanning electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy, insights into the structures and local environments that affect the ion transport are provided. These results indicate that the synergetic O/Cl ratio, La/Ta ratio, and Li+ carrier concentration play a pivotal role in structures and properties of the amorphous oxyhalide SEs. Notably, the Li1.4La0.35Ta0.65O0.7Cl4.3 not only delivers an impressive room-temperature of 4.9 mS cm-1, but also demonstrates an exceptionally high critical current density (CCD) of 40 mA cm-2 in symmetric Li cells using bare Li metal.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"90 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Gradient architecture design of porous aramid nanofiber separators for robust and safe lithium-ion batteries 用于坚固安全锂离子电池的多孔芳纶纳米纤维分离器的梯度结构设计

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta01896j

Hui Xu, Fang Wang, Shenglin Yang, Guang Li, Jingjing Zhang

{"title":"Gradient architecture design of porous aramid nanofiber separators for robust and safe lithium-ion batteries","authors":"Hui Xu, Fang Wang, Shenglin Yang, Guang Li, Jingjing Zhang","doi":"10.1039/d5ta01896j","DOIUrl":"https://doi.org/10.1039/d5ta01896j","url":null,"abstract":"Separator failure remains a critical safety challenge for the application of lithium-ion batteries (LIBs). Conventional polyolefin separators lack thermal stability that limits high-temperature operations, and the nonuniform, uncontrolled pores tend to induce lithium dendrite growth that compromises safety and performance. Herein, we develop a proton donor-regulated assembly strategy to incorporate a gradient nanopore architecture to aramid nanofibers (GANFM), which serves as a thermally stable and electrochemically superior separator for LIBs. Comparative experiments and simulations involving gradient separators in opposite orientations and a polyethylene (PP) separator reveal the mechanism of GANFM design. The larger nanopores near the cathode function as ion guides that facilitate Li-ion transport, while the smaller nanopores near the anode act as ion regulators smoothing the ion distribution. As a result, the GANFM achieves superior ionic conductivity and significantly reduces Li-ion concentration fluctuations (standard deviation is 0.39 times lower than that of PP). Both symmetric and full cells incorporating GANFM exhibit excellent reversible capacity and C-rate performance. The LiFePO4//Li cells retain 85.3% capacity after 300 cycles with a high current density (5C) at room temperature. Even at 55 °C, capacity retention remains at 86.7% after 250 cycles. Our work deepens the understanding of pore structure-related electrochemistry and provides valuable insights into the design of high-safety separators for LIBs.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"81 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Tannic Acid-Assisted Surface Encasing of Bismuth Nanoparticle on Carbon Felt for High-Performance Vanadium Redox Flow Batteries 高性能钒氧化还原液流电池用单宁酸辅助铋纳米颗粒在碳毡表面的包覆

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-07-08 DOI: 10.1039/d5ta02492g

Jining Sun, Wenbo Zhang, Mengfan Lv, Jingren Chen, Mingming Zhao, Yu Cao, Jin Wang, Tao Fang, Hongdong Jiang, Lei Zhang

{"title":"Tannic Acid-Assisted Surface Encasing of Bismuth Nanoparticle on Carbon Felt for High-Performance Vanadium Redox Flow Batteries","authors":"Jining Sun, Wenbo Zhang, Mengfan Lv, Jingren Chen, Mingming Zhao, Yu Cao, Jin Wang, Tao Fang, Hongdong Jiang, Lei Zhang","doi":"10.1039/d5ta02492g","DOIUrl":"https://doi.org/10.1039/d5ta02492g","url":null,"abstract":"Achieving superior catalytic ability and robust mechanochemical stability in metal-catalyzed nanoparticles deposited on electrode surfaces is essential for advancing the commercial viability of high-performance flow battery technologies. Herein, we propose a type of carbon felt electrode surface encased with bismuth nanoparticles (Bi NPs) via a tannic acid-assisted robust immobilization, which can catalyze the V²⁺/V³⁺ redox reaction with high efficiency and outstanding durability. The hydroxyl groups in tannic acid serve as polydentate ligands, coordinating with bismuth ions to form an exceptionally stable protective framework around the Bi NPs generated during carbothermic reactions. These enchased Bi NPs are well-preserved under electrolyte flow, surpassing that of Bi NPs electrodes fabricated via single carbothermic reduction or electrodeposition methods. The results demonstrate that the VRFBs equipped with the present electrode achieve energy efficiencies of 77.68% and 72.11% at current densities of 300 mA cm⁻² and 400 mA cm⁻², which are remarkably increased by 4.90% and 8.53% than those of batteries integrated with pristine carbon felt. Furthermore, at 400 mA cm⁻², the discharge capacity increases by as much as 136%. Moreover, the novel structured catalytic electrodes enable the VRFBs to sustain high performance even after 2000 cycles at 300 mA cm⁻², exhibiting an energy efficiency retention rate of 99.97% and a discharge capacity decay rate of 0.014% per cycle.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"8 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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