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Tailoring NH4+ storage by regulating oxygen defect in ammonium vanadate

Green Energy & Environment 2024年第7期9卷 1171-1182页

作者： Yanyan Liu Ziyi Feng Hanmei Jiang Xueying Dong Changgong Meng yifu zhang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology College of Environmental and Chemical Engineering Dalian University

Defect engineering is an effective strategy for modifying the energy storage materials to improve their electrochemical ***, the impact of oxygen defect and its content on the electrochemical performances in the burgeoning aqueous NH+4storage field remains explored. Therefore, for the first time in this work, an oxygen-defective ammonium vanadate [（NH4）2V10O25·8H2O, denoted as Od-NHVO] with a novel 3D porous flower-like architecture was achieved via the reduction of thiourea in a mild reaction condition, which is a facile method that can realize the intention to regulate the oxygen defect content, with the capability of mass-production. The as-prepared OdM-NHVO with moderate oxygen defect content can deliver a stable specific capacitance output(505 F g-1, 252 mAh g-1at 0.5 A g-1with ～80% capacitance retention after 10,000 cycles), which benefits from extra active sites, unimpeded NH+4-migration path and relatively high structure integrity. In contrast, low oxygen defect content will lead to the torpid electrochemical reaction kinetics while too high content of it will reduce the chargestorage capability and induce structural disintegration. The superior NH+4-storage behavior is achieved with the reversible intercalation/deintercalation process of NH+4accompanied by forming/breaking of hydrogen bond. As expected, the assembled flexible OdM-NHVO//PTCDI quasi-solid-state hybrid supercapacitor（FQSS HSC） also exhibits high areal capacitance, energy density and reliable flexibility. This work provides a new avenue for developing materials with oxygen-deficient structure for application in various aqueous non-metal cation storage systems.

关键词： Ammonium vanadate Oxygen defect Ammonium-ion storage Hybrid supercapacitors Electrochemical performance

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Adjusting oxygen vacancy of VO_(2)·xH_(2)O nanoarray architectures for efficient NH_(4)^(+) storage

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Nano Research 2024年第4期17卷 2646-2654页

作者： Jia’ni Gong Pengfei Bai Jingjing Sun Yanyan Liu Xueying Dong Tao Hu Changgong Meng yifu zhang School of Chemistry Dalian University of TechnologyDalian 116024China School of Chemistry and Materials Sciences CAS Key Laboratory of Materials for Energy ConversionCAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230026China College of Environmental and Chemical Engineering Dalian UniversityDalian 116622China

Aqueous rechargeable batteries are the promising energy storge technology due to their safety,low cost,and environmental *** ion(NH_(4)^(+))is an ideal charge carrier for such batteries because of its small hydration radius and low molar *** this study,VO_(2)·xH_(2)O with rich oxygen defects(d-HVO)is designed and synthesized,and it exhibits unique nanoarray structure and good electrochemical performances for NH_(4)^(+)*** and calculation results indicate that oxygen defects in d-HVO can enhance the conductivity and diffusion rate of NH_(4)^(+),leading to improved electrochemical *** most significant improvement is observed in d-HVO with 2 mmol thiourea(d-HVO-2)(220 mAh·g^(-1) at 0.1 A·g^(-1)),which has a moderate defect content.A full cell is assembled using d-HVO-2 as the anode and polyaniline(PANI)as the cathode,which shows excellent cycling stability with a capacity retention rate of 80%after 1000 cycles and outstanding power density up to 4540 W·kg^(-1).Moreover,the flexible d-HVO-2||PANI battery,based on quasi-solid electrolyte,shows excellent flexibility under different bending *** study provides a new approach for designing and developing high-performance NH_(4)^(+)storage electrode materials.

关键词： hydrate vanadium dioxide oxygen defects ammonium-ion battery anode material

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Better engineering layered vanadium oxides for aqueous zinc‐ion batteries: Going beyond widening the interlayer spacing

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SmartMat 2024年第1期5卷 83-109页

作者： Yue Guo Hanmei Jiang Binbin Liu Xingyang Wang yifu zhang Jianguo Sun John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalianChina Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

Aqueous zinc‐ion batteries(ZIBs)are regarded as among the most promising candidates for large‐scale grid energy storage,owing to their high safety,low costs,and environmental *** the past decade,vanadium oxides,which are exemplified by V2O5,have been widely developed as a class of cathode materials for ZIBs,where the relatively high theoretical capacity and structural stability are among the main ***,there are considerable challenges in the construction of vanadium‐based ZIBs with high capacity,long lifespan,and excellent rate *** widenings of the interlayer spacing in the layered vanadium oxides by pre‐intercalations appear to have reached their limitations in improving the energy density and other key performance parameters of ZIBs,although various metal ions(Na+,Ca2+,and Al3+)and even organic cations/groups have been ***,we discuss the advances made more recently,and also the challenges faced by the high‐performance vanadium oxides(V2O5‐based)cathodes,where there are several strategies to improve their electrochemical performance ranging from the new structural designs down to sub‐nano‐scopic/molecular/atomic levels,including cation pre‐intercalation,structural water optimization,and defect engineering,to macroscopic structural *** key principles for an optimal structural design of the V2O5‐based cathode materials for high energy density and fast‐charging aqueous ZIBs are examined,aiming at paving the way for developing energy storage designed for those large scales,high safety,and low‐cost systems.

关键词： aqueous zinc‐ion batteries cations pre‐intercalation defect engineering structural water vanadium oxides

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Intermetallic ferric nickel silicide alloy derived from magadiite by magnesiothermic reaction as bifunctional electrocatalyst for overall water splitting

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Nano Research Energy 2024年第2期3卷 20-30页

作者： Xuyang Jing Yang Mu Zhanming Gao Xueying Dong Changgong Meng Chi Huang yifu zhang School of Chemistry Dalian University of TechnologyDalian 116024China College of Environmental and Chemical Engineering Dalian UniversityDalian 116622China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China

As the cleanest energy source,hydrogen energy is regarded as the most promising *** electrolysis,as the primary means of hydrogen production,has constantly been the focus of attention in the energy conversion *** eco-friendly,cheap,safe and efficient catalysts for electrochemical water splitting(EWS)is the key ***,the intermetallic silicide alloy is first synthesized via a facile magnesiothermic reduction and employed as bifunctional electrocatalysts for ***-nickel silicide(denoted as FeNiSi)alloy is designed and shows a good electrocatalytic performance for *** lattice distortions of FeNiSi enhance the electrocatalytic ***,the porous structure affords more active sites and improves the reaction *** a consequence,FeNiSi delivers an excellent performance with overpotential of 308 mV for oxygen evolution reaction(OER)and 386 mV for hydrogen evolution reaction(HER)at 10 mA·cm−2 in 1 M *** stability structure of intermetallic silicide achieves an outstanding durability with an unchanged potential of 1.66 V for overall water splitting at 10 mA·cm−2 for 15 *** work not only provides a facile method for the synthesis of intermetallic silicide with considerable porous structures,but also develops the potential of intermetallic silicide alloy as bifunctional electrocatalysts for EWS,which opens up a new avenue for the design and application of intermetallic silicide alloy.

关键词： bimetallic silicide magadiite magnesiothermic reduction bifunctional electrocatalyst overall water splitting

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计及用户热耐受度的区域综合能源系统韧性评估及提升研究

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全球能源互联网 2024年第1期7卷 3-13页

作者：杜洁张海锋王佳蕊李德鑫庄冠群张懿夫刘泽宇侯恺余晓丹天津大学智能电网教育部重点实验室天津市南开区300072 国网吉林省电力有限公司电力科学研究院吉林省长春市130021

区域综合能源系统韧性评估涉及电力、燃气、冷热及建筑物等多元素特性,极端自然灾害的发生可能造成区域综合能源系统基础设施的严重损坏,尽管现有方法已部分考虑了区域热网动态特性,但对于长时间供热缺失造成的用户生命健康影响考虑不... 详细信息

区域综合能源系统韧性评估涉及电力、燃气、冷热及建筑物等多元素特性,极端自然灾害的发生可能造成区域综合能源系统基础设施的严重损坏,尽管现有方法已部分考虑了区域热网动态特性,但对于长时间供热缺失造成的用户生命健康影响考虑不足。针对这一问题,提出了考虑用户热耐受度的韧性评估及提升方法。首先,建立了建筑物室内环境和用户热舒适度的耦合关系模型,提出了计及用户热耐受度的韧性评估指标,进而提出面向区域综合能源系统的韧性评估流程。其次,建立了极端天气灾前、灾中和灾后三阶段的韧性提升调度优化方法,实现了区域综合能源系统运行成本和停供能损失的兼顾。最后算例分析表明,所提方法填补了传统区域综合能源系统韧性分析中对于用户生命健康考量的缺失,实现了多能源经济效益和用户感受的双重提升。

关键词：韧性评估及提升用户热耐受度区域综合能源系统室内温度

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Single‑Atom Catalysts:Advances and Challenges in Metal‑Support Interactions for Enhanced Electrocatalysis

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Electrochemical Energy Reviews 2022年第1期5卷 145-186页

作者： Yang Mu Tingting Wang Jian zhang Changgong Meng yifu zhang Zongkui Kou School of Chemical Engineering Dalian University of TechnologyDalian 116024LiaoningChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina

Single-atom catalysts(SACs),which contain a single metal atom supported on a well-confined substrate,are among the most promising heterogeneous catalysts owing to their unique advantages,such as high intrinsic activity and selectivity,tunable bonds and coordination,abundant metal-containing active sites,and atomic *** metal-support interactions(MSIs)in SACs exert a substantial influence on the catalytic properties,gaining a profound understanding and recognition of catalytic reactions depends greatly on investigating MSIs both experimentally and ***,the engineer-ing and modulation of MSIs are regarded as one of the most efficient methods to rationally design SACs with disruptively enhanced catalytic *** this review,we track the recent advances in SACs from an MSI *** then discuss the existing MSIs in SACs and elucidate the significant role of strong MSIs in catalytic properties and *** chal-lenges hindering the rational design of supported SACs with strong MSIs,which are currently still far from being completely understood and overcome,are *** addition,the correlation between strong MSIs and electrocatalytic activities in SACs,including an outlook to increase our understanding of MSIs,is ***,the present review provides some perspectives and an in-depth understanding of strong MSIs to advance high-performing SACs.

关键词： Metal-support interaction Single-atom catalysts Electrocatalysis ORR and OER HER and HOR

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面向工程能力培养的农机专业生产实习存在的问题及对策

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创新创业理论研究与实践 2024年第5期7卷 113-116页

作者：瞿济伟张宝峰奚小波张翼夫张瑞宏扬州大学机械工程学院江苏扬州225127

生产实习是高等本科学校农业机械化及其自动专业的重要教学环节,对于学生工程能力的培养具有重要作用,可促进学生的就业和职业发展。然而,目前农机专业生产实习仍存在诸多问题,不利于学生工程能力的培养。该文基于当前农机专业生产实习... 详细信息

生产实习是高等本科学校农业机械化及其自动专业的重要教学环节,对于学生工程能力的培养具有重要作用,可促进学生的就业和职业发展。然而,目前农机专业生产实习仍存在诸多问题,不利于学生工程能力的培养。该文基于当前农机专业生产实习现状,剖析了生产实习中学生工程能力培养存在的具体问题,包括学生对生产实习重视度不足、缺乏高水平指导教师、实习内容不深入、组织形式较松散、实践考核缺乏针对性等,提出了挖掘学生内在动力、聘请企业导师、紧跟行业需求、细分实习计划、优化考核内容等教学改革措施,以提高学生对实习的重视程度、提升指导教师水平、拓展实习内容、优化实习组织形式、提升考核时效,并进行了教学实践,取得了良好效果。该文对于其他同类课程的生产实习教学具有一定的借鉴价值。

关键词：农机专业生产实习本科教学实践工程能力人才培养教学改革

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真空玻璃封接用旋转式激光加工装备的设计

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扬州大学学报（自然科学版） 2024年第1期27卷 18-25页

作者：王彪奚小波史扬杰张剑峰张翼夫张瑞宏扬州大学机械工程学院江苏扬州225127

激光封边具有封接效率高的优势,但真空玻璃激光封边过程中易发生透射、反射、吸收等相互作用,导致封边质量不佳.针对上述问题,设计了一种包含夹持机构、翻转机构、同步旋转机构的真空玻璃封接用旋转式激光加工装备,并通过对双平行四杆... 详细信息

激光封边具有封接效率高的优势,但真空玻璃激光封边过程中易发生透射、反射、吸收等相互作用,导致封边质量不佳.针对上述问题,设计了一种包含夹持机构、翻转机构、同步旋转机构的真空玻璃封接用旋转式激光加工装备,并通过对双平行四杆、曲柄摇杆、滑块摇杆的运动分析,优化该装备的翻转机构.实验结果表明,该装备可实现玻璃夹持、翻转、同步旋转等功能,优化后的翻转机构在夹持机构翻转90°时末线速度为0 mm·s^(-1),且翻转过程中线加速度无突变,对支撑柱冲击较小,可稳定夹持平板玻璃,为真空玻璃的封接工艺及制造装备设计提供了参考.

关键词：新型真空玻璃激光封接夹持机构翻转机构同步旋转机构

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Flexible quasi-solid-state zinc-ion hybrid supercapacitor based on carbon cloths displays ultrahigh areal capacitance

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Fundamental Research 2023年第2期3卷 288-297页

作者： yifu zhang Peng Wang Xueying Dong Hanmei Jiang Miao Cui Changgong Meng State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China

Over the past few years,the flexible quasi-solid-state zinc-ion hybrid supercapacitors(FQSS ZHSCs)have been found to be ideal for wearable electronics applications due to their high areal capacitance and energy *** assembly of desirable ZHSCs devices that have promising practical applications is of high importance,whereas it is still challenging to assemble ZHSCs *** this study,a ZHSC that exhibited ultrahigh areal capacitance and high stability was developed by using an active carbon cloth(ACC)cathode,which could improve ionic *** as-obtained ACC cathode had an energy storage mechanism due to the electrical double-layer capacitive behavior of Zn^(2+),which was accompanied by the dissolution/deposition of Zn_(4)SO_(4)(OH)6·*** ACC//Zn@ACC ZHSC device exhibited an areal capacitance of 2437 mF cm^(−2)(81 F cm^(−3),203 F g^(-1) under the mass of ACC with∼12 mg cm^(−2))at 1 mA cm^(−2),an areal energy density of 1.354 mWh cm^(−2) at 1 mW cm^(−2),as well as high stability(with an insignificant capacitance decline after 20000 cycles),which was demonstrated to outperform the existing ***,the assembled flexible device still had competitive capacitance,energy density and service life when integrated into a FQSS *** applied in practice,the device could achieve high mechanical flexibility,wearable stability and *** study can inspire the development of the FQSS ZHSC device to satisfy the demands for wearable energy storage devices with high performance.

关键词： Active carbon cloth Zinc-ion hybrid supercapacitor Areal capacitanceAreal energy density Flexibility Energy storage

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Synergistic effect of K^(+)and PANI in vanadium oxide hydration by interlayer engineering boosts the ammonium ion storage

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SusMat 2023年第2期3卷 263-275页

作者： Xingyu Chen Ziying Feng Xueying Dong Hanmei Jiang Changgong Meng yifu zhang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalianChina Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore

Aqueous ammonium-ion(NH_(4)^(+))hybrid supercapacitor(AA-HSC),as a new type of energy storage device with great potential,is in the initial stage of rapid *** on its special energy storage mechanism,exploiting novel NH_(4)^(+)-hostingmaterials is still a great ***,vanadium oxide hydration(VOH)tuned by interlayer engineering of K+/PANI co-intercalation,named KVO/PANI,is designed for *** PANI can shield interaction between NH_(4)^(+)and V–O layers to some extent and enlarge interlayer space,which improves the efficiency of reversible NH_(4)^(+)(de)***,K+enhances redox activity and electronic *** synergistic effect of co-intercalation optimizes intercalation pseudocapacitive behavior during the(de)ammonization process,which is reported in NH_(4)^(+)storage for the first *** calculations reveal that the lowered electron transport barrier and enhanced electronic conductivity improveNH_(4)^(+)kinetics and exhibit high capacitance for charge *** KVO/PANI can deliver the specific capacitance of 340 F g^(−1) at 0.5 A g^(−1) and retain 177 F g^(−1) at 10 A g^(−1).Pairing with activated carbon,the AA-HSC can achieve a decent energy density of 31.8 Wh kg^(−1).This work gives inorganic/organic co-intercalation that can enhance the NH_(4)^(+)storage of VOH by interlayer *** strategy can be used to design other materials for aqueous energy storage systems.

关键词： ammonium-ion hybrid supercapacitor interlayer engineering K+/PANI co-intercalation

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