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Alumina modified sodium vanadate cathode for aqueous zinc-ion batteries

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Frontiers in Energy 2023年第6期17卷 775-781页

作者： Linsong GAN Fei LIU Xinhai YUAN lijun fu Yuping WU State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy Science and EngineeringNanjing Tech UniversityNanjing 211816China

Aqueous zinc-ion batteries (ZIBs) have great prospects for widespread application in massive scale energy storage. By virtue of the multivalent state, open frame structure and high theoretical specific capacity, vanadium (V)-based compounds are a kind of the most developmental potential cathode materials for ZIBs. However, the slow kinetics caused by low conductivity and the capacity degradation caused by material dissolution still need to be addressed for large-scale applications. Therefore, sodium vanadate Na_(2)V_(6)O_(16)·3H_(2)O (NVO) was chosen as a model material, and was modified with alumina coating through simple mixing and stirring methods. After Al_(2)O_(3) coating modification, the rate capability and long-cycle stability of Zn//NVO@Al_(2)O_(3) battery have been significantly improved. The discharge specific capacity of NVO@Al_(2)O_(3) reach up to 228 mAh/g (at 4 A/g), with a capacity reservation rate of approximately 68% after 1000 cycles, and the Coulombic efficiency (CE) is close to 100%. As a comparison, the capacity reservation rate of Zn//NVO battery is only 27.7%. Its superior electrochemical performance is mainly attributed to the Al2O3 coating layer, which can increase zinc-ion conductivity of the material surface, and to some extent inhibit the dissolution of NVO, making the structure stable and improving the cyclic stability of the material. This paper offers new prospects for the development of cathode coating materials for ZIBs.

关键词： cathodes aqueous zinc-ion batteries sodium vanadate alumina coating

Periodic orbit model of diode rectifiers-synchronous machine system

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Science China(Technological Sciences) 2013年第1期56卷 245-252页

作者： WANG Gang fu lijun FAN XueXin YE ZhiHao MA Fan National Key Laboratory for Vessel Integrated Power System Technology

Diode rectifiers-synchronous machine system has a wide range of applications in isolated power system,whose low frequency oscillation emerges under certain *** error is produced when the state space averaging model is used to analyze its small signal ***,this paper has presented a periodic orbit model of diode rectifiers-synchronous machine system to solve these *** trapezoidal integration method,it is possible to derive equation of periodic orbit and its Poincaré *** matrix of the Poincaré mapping of periodic orbit can be calculated by chain derivative ***,stability margin index and linearized Poincaré mapping model have also been *** small signal stability of diode rectifiers-synchronous machine system can be assessed through orbitally asymptotical stability of its periodic orbit so as to lay a foundation for isolated power system analysis and its control *** test demonstrates that the proposed model and algorithm are effective and practicable.

关键词： power system diode rectifiers-synchronous machine system small signal stability modeling periodic orbit

Advances on Na-K liquid alloy-based batteries

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Journal of Energy Chemistry 2022年第8期31卷 313-323,I0009页

作者： Junwei Wu Zhuang Xue Lixuan Yuan Jilei Ye Qinghong Huang lijun fu Yuping Wu State Key Laboratory of Materials-Oriented Chemical Engineering College of Energy Science and EngineeringNanjing Tech UniversityNanjing 211816JiangsuChina

Sodium-potassium(Na^(-)K)liquid alloys attract increasing research attention,as an ideal alternative of Li metal for metal-based batteries,attributing to their high abundance,low redox potential,high capacity,and dendrite-free *** addition,the liquid and self-healing features of Na^(-)K alloys endow good electrode/electrolyte interfacial *** recent advances on the Na^(-)K liquid alloy-based batteries(NKBs)are reviewed *** anode designs for immobilization of the liquid alloy are *** influences of the electrolyte and cathode materials on the battery performances are *** addition,considering the co-existence of both K^(+)and Na^(+)in the electrolyte,the working mechanisms of the NKBs are *** also show that despite the improvement,challenges of the NKBs *** compatibility between Na^(-)K liquid alloy and electrolyte,as well as disputed working mechanisms,request detailed surface analyses of the liquid alloy and local element distribution evolution in the *** review would shed light on the fundamental understanding of Na^(-)K alloy electrochemistry and the development of dendrite-free metal-based energy storage systems with high energy density.

关键词： Sodium-potassium alloy Liquid anode Metal battery Dendrite-free Mechanism

Advances of Aluminum Based Energy Storage Systems

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Chinese Journal of Chemistry 2017年第1期35卷 13-20页

作者： lijun fu Na Li Yu Liu Weigang Wang Yusong Zhu Yuping Wu College of Energy Science and Engineering and Institute of Advanced Materials Nanjing Tech University No. 30 Puzhu Road (S) Nanjing Jiangsu 211800 China

Rechargeable aluminum based batteries and supercapacitors have been regarded as promising sustainable ener- gy storage candidates, because aluminum metal is the most abundant metal element in the earth crust, and it delivers very high volumetric capacity and acceptable gravimetric capacity. This mini review presents the brief development of Al-based primary batteries, and introduces the latest advances of rechargeable Al-based energy storage systems with both nonaqueous and aqueous electrolytes.

关键词： aluminum battery supercapacitor aqueous and nonaqueous electrolytes

The Critical Role of Fillers in Composite Polymer Electrolytes for Lithium Battery

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Nano-Micro Letters 2023年第5期15卷 339-375页

作者： Xueying Yang Jiaxiang Liu Nanbiao Pei Zhiqiang Chen Ruiyang Li lijun fu Peng Zhang Jinbao Zhao College of Energy Xiamen UniversityXiamen 361102People’s Republic of China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005People’s Republic of China College of Energy Nanjing Technical UniversityNanjing 211816People’s Republic of China

With excellent energy densities and highly safe performance,solidstate lithium batteries(SSLBs)have been hailed as promising energy storage ***-state electrolyte is the core component of SSLBs and plays an essential role in the safety and electrochemical performance of the *** polymer electrolytes(CPEs)are considered as one of the most promising candidates among all solid-state electrolytes due to their excellent comprehensive *** this review,we briefly introduce the components of CPEs,such as the polymer matrix and the species of fillers,as well as the integration of fillers in the *** particular,we focus on the two major obstacles that affect the development of CPEs:the low ionic conductivity of the electrolyte and high interfacial *** provide insight into the factors influencing ionic conductivity,in terms of macroscopic and microscopic aspects,including the aggregated structure of the polymer,ion migration rate and carrier *** addition,we also discuss the electrode-electrolyte interface and summarize methods for improving this *** is expected that this review will provide feasible solutions for modifying CPEs through further understanding of the ion conduction mechanism in CPEs and for improving the compatibility of the electrode-electrolyte interface.

关键词： Composite polymer electrolytes Fillers Ionic conductivity Electrode-electrolyte interface

Metagenomic analysis revealing the metabolic role of microbial communities in the free amino acid biosynthesis of Monascus rice vinegar during fermentation

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Food Science and Human Wellness 2024年第4期13卷 2317-2326页

作者： Hang Gao Jian Zhang Li Liu lijun fu Yan Zhao Germán Mazza Xin Zhang Beijing Academy of Food Sciences 100068 BeijingChina Institute for Research and Development in Process Engineering Biotechnology and Alternative Energies(PROBIENCONICET-UNCo)8300 NeuquénArgentina

Free amino acid(FAA)is the important component of vinegar that infl uences quality perception and consumer *** is one of the major metabolites produced by microorganisms;however,the microbial metabolic network on FAA biosynthesis remains *** metagenomic analysis,this work aimed to elucidate the roles of microbes in FAA biosynthesis during Monascus rice vinegar *** profiles from functional analyses showed 14 dominant genera with high contributions to the metabolism *** metabolic network for FAA biosynthesis was then constructed,and the microbial distribution in different metabolic pathways was *** results revealed that 5 functional genera were closely involved in FAA *** study illuminated the metabolic roles of microorganisms in FAA biosynthesis and provided crucial insights into the functional attributes of microbiota in vinegar fermentation.

关键词： Monascus rice vinegar Metagenomic analysis Free amino acid synthesis Metabolic pathway Microbial distribution

Si/C Composites as Negative Electrode for High Energy Lithium Ion Batteries

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Chinese Journal of Chemistry 2017年第1期35卷 21-29页

作者： Yi Zhang Yusong Zhu lijun fu Jixing Meng Nengfei Yu Jing Wang Yuping Wu College of Energy and Institute for Electrochemical Energy Storage Nanjing Tech University Nanjing Jiangsu 211816 China Jiangsu Key Laboratory of Engineering Mechanics School of Civil Engineering Southeast University Nanjing Jiangsu 210096 China

Silicon is very promising negative electrode materials for improving the energy density of lithium-ion batteries （LIBs） because of its high specific capacity, moderate potential, environmental friendliness, and low cost. However, the volume variation of Si negative electrodes is huge during lithiation/delithiation processes which results in pulverization, low cycling efficiency, and permanent capacity loss. In order to overcome this problem, tremendous efforts have been attempted. Among them the most successful strategy is to incorporate other components into silicon to form composite, especially the carbon medium. In this mini review, the recent progress on Si/C materials used as negative electrode of LIBs is summarized such as Si/amorphous carbon composite, Si/graphene composites, Si/carbon nanotubes or fibers composites. The fabrication, structure, electrochemical performances of different Si/C composites are discussed. In addition, some future directions are pointed out.

关键词： lithium-ion batteries silicon Si/C composites negative electrodes

Recent advances in modification strategies of silicon-based lithiumion batteries

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Nano Research 2023年第3期16卷 3781-3803页

作者： Wenlei Wang Yu Wang Lixuan Yuan Chaolin You Junwei Wu Lili Liu Jilei Ye Yunling Wu lijun fu State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy Science and EngineeringNanjing Tech UniversityNanjing 211816China

As potential alternatives to graphite,silicon(Si)and silicon oxides(SiO_(x))received a lot of attention as anode materials for lithiumion batteries owing to their relatively low working potentials,high theoretical specific capacities,and abundant ***,the commercialization of Si-based anodes is greatly hindered by their massive volume expansion,low conductivity,unstable solid electrolyte interface(SEI),and low initial Coulombic efficiency(ICE).Continuous endeavors have been devoted to overcoming these challenges to achieve practical *** review is centered on the major challenges and latest developments in the modification strategies of Si-based anodes,including structure optimization,surface/interface regulation,novel binders,and innovative design of ***,outlooks and perspectives of Si-based anodes for future development are presented.

关键词： lithium-ion batteries silicon silicon oxides modification strategies

Constructing a lithiophilic polyaniline coating via in situ polymerization for dendrite-free lithium metal anode

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Nano Research 2023年第6期16卷 8448-8456页

作者： Xiaosong Xiong Qiao Qiao Qi Zhou Xinbing Cheng Lili Liu lijun fu Yuhui Chen Bin Wang Xiongwei Wu Yuping Wu School of Energy and Environment Southeast UniversityNanjing 210096China School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816China School of Energy Science and Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 211816China National Energy Novel Materials Center Institute of Chemical Materials(ICM) China Academy of Engineering Physics(CAEP)Mianyang 621900China Hunan Yinfeng New Energy Co. Ltd.Changsha 430019China

Metallic lithium is regarded as one of the most promising electrode materials to break through the energy density bottleneck of current commercial lithium-ion ***,the practical implementation of lithium metal anode is limited by the unstable electrode interface significantly,which directly induces a low Coulombic efficiency,short cycling lifespan,and dendritic lithium growth *** this study,via in situ electropolymerization,lithiophilic and conformal polyaniline layer is developed to improve the initial lithium nucleation and plating process,reducing the interface charge transfer resistance and promoting uniform lithium plating/stripping ***,the polyaniline layer exhibits good adhesion to the *** a result,the Li/Cu half cell delivers a high Coulombic efficiency of 99.1%for 400 cycles at 1.0 mA·cm^(−2)with polyaniline *** addition,long-term stable cycling at a current density of 1.0 mA·cm^(−2)for 1300 h has been achieved for lithium metal *** strategy provides a new perspective for the practical lithium metal batteries.

关键词： polyaniline in situ electropolymerization electrode interface lithium metal anode