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Nano Research 2023年第1期16卷 536-544页

作者： Hao chen Weijun Zhou minfeng chen Qinghua Tian Xiang Han Jizhang chen College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province Department of ChemistryZhejiang Sci-Tech UniversityHangzhou 310018China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037China

With low cost and high safety,aqueous zinc-based batteries have received considerable ***,the excess utilization of zinc metal in the anodes of these batteries reduces energy density and increases ***,an ultrathin electrode of approximately 6.2μm thick is constructed by coating Ti_(3)C_(2)T_(x)/nanocellulose hybrid onto a stainless steel *** electrode is used as the Zn-free anode for aqueous hybrid Zn-Na battery,in which,a concentrated electrolyte is used to improve electrochemical *** Ti_(3)C_(2)T_(x)/nanocellulose coating is found to improve the electrolyte wettability,facilitate desolvation process of hydrated Zn^(2+) ions,lower nucleation overpotential,improve zinc plating kinetics,guide horizontal zinc plating along the Zn(002)facet,and inhibit parasitic side *** is also found that the Na_(3)V_(2)(PO_(4))_(3) cathode material adopts a highly reversible Zn^(2+)/Na^(+)co-intercalation charge storage mechanism in this *** to these benefits,the assembled hybrid Zn-Na battery exhibits excellent rate capability,superior cyclability,and good anti-freezing *** work provides a new concept of electrode design for electrochemical energy storage.

关键词： MXene-based composites ultrathin electrodes electrode surface coatings aqueous hybrid batteries co-intercalation charge storage mechanisms

Molten salt synthesis of α-MnO_(2)/Mn_(2)O_(3) nanocomposite as a high-performance cathode material for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2021年第3期30卷 475-481页

作者： Aixiang Huang Weijun Zhou Anran Wang minfeng chen Qinghua Tian Jizhang chen College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037JiangsuChina Department of Chemistry School of SciencesZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037JiangsuChina

Thanks to low cost,high safety,and large energy density,aqueous zinc-ion batteries have attracted tremendous interest ***,it remains a challenge to develop high-performance cathode materials with an appropriate method that is easy to realize massive ***,we use a molten salt method to synthesize nanostructured manganese *** crystalline phases of the manganese oxides can be tuned by changing the amount of reduced graphene oxide added to the reactant *** is found that the α-MnO_(2)/Mn_(2)O_(3) nanocomposite with the largest mass ratio of Mn_(2)O_(3) delivers the best electrochemical performances among all the *** its rate capability and cyclability can be significantly improved by modifying the Zn anode with carbon black coating and nanocellulose *** this situation,the nanocomposite can deliver high discharging capacities of 322.1 and 213.6 mAh g^(-1) at 0.2 and 3 Ag^(-1),*** 1000 cycles,it can retain 86.2% of the capacity at the 2 nd ***,this nanocomposite holds great promise for practical applications.

关键词： Manganese oxides Molten salt synthesis Nanostructured composites Aqueous batteries Zinc ion storage

Advances and perspectives on separators of aqueous zinc ion batteries

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Energy Reviews 2022年第1期1卷 34-42页

作者： Jizhang chen minfeng chen Hong Ma Weijun Zhou Xinwu Xu College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing210037China

With the advantages of intrinsic safety,good affordability,environmental friendliness,moderate energy density,and large power density,aqueous zinc ion batteries(AZIBs)have gained considerable research ***,zinc dendrites,hydrogen evolution,inert byproducts,and zinc metal corrosion severely hinder practical applications of *** order to address these issues,many research works have been carried out to modify the interface between zinc metal anode and aqueous *** fact,the interface engineering takes effect at the surface and near the surface of ***,a specialized review on the separators of AZIBs is still ***,basic requirements of separators and recent advances on the modification strategies including employment of functional groups,establishment of surface coatings,construction of hybrid architectures,regulations of porosity,and utilization of bipolar membrane are ***,the perspectives for further investigations on the separators of AZIBs are *** review could offer useful guidance for the future explorations of separators for AZIBs.

关键词： Aqueous Zn-ion batteries Separators Interfacial stability Dendrite inhibition Zn deposition

Artificial solid electrolyte interface layer based on sodium titanate hollow microspheres assembled by nanotubes to stabilize zinc metal electrodes

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Journal of Energy Chemistry 2022年第8期31卷 539-546,I0015页

作者： minfeng chen Weijun Zhou Qinghua Tian Xiang Han Yanjun Tan Jizhang chen Ching-Ping Wong Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037JiangsuChina Department of Chemistry School of SciencesZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Nanjing Sanle Group Co. Ltd.Nanjing 211800JiangsuChina School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Recently,aqueous zinc-ion batteries with intrinsic safety,low cost,and environmental benignity have attracted tremendous research ***,zinc dendrites,harmful side reactions,and zinc metal corrosion stand in the ***,we use lepidocrocite-type sodium titanate hollow microspheres assembled by nanotubes to constitute an artificial solid electrolyte interface layer on the zinc metal *** to the hierarchical structure with abundant open voids,negative-charged layered framework,low hydrophilicity,electrically insulting nature,and large ionic conductivity,the sodium titanate coating layer can effectively homogenize the electric field,promote the Zn^(2+)ion transfer,guide the Zn^(2+)ion flux,reduce the desolvation barrier,improve the exchange current density,and accommodate the plated zinc ***,this coating layer can effectively suppress zinc dendrites and other unfavorable *** this coating layer,the Zn//Zn symmetric cell is able to provide an impressive cumulative zinc plating capacity of 1375 m Ah cm^(-2) at a current density of 5 m A cm^(-2).This coating layer also contributes to significantly improved electrochemical performances of Zn//MnO_(2) battery and zincion hybrid *** work offers new insights into the modifications of zinc metal electrodes.

关键词： Artificial SEI layers Hierarchical sodium titanates Interfacial stability Dendrite inhibition Aqueous Zn-ion batteries

Optimizing the electrolyte salt of aqueous zinc-ion batteries based on a high-performance calcium vanadate hydrate cathode material

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Journal of Energy Chemistry 2021年第1期30卷 377-384,I0012页

作者： Weijun Zhou minfeng chen Anran Wang Aixiang Huang Jizhang chen Xinwu Xu Ching-Ping Wong College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037JiangsuChina School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaUnited States

It is urgent to develop high-performance cathode materials for the emerging aqueous zinc-ion batteries with a facile strategy and optimize the related ***,a Ca0.23V2O5·0.95 H2O nanobelt cathode material with a rather large interlayer spacing of 13.0 A is prepared via a one-step hydrothermal *** battery with this cathode material and 3 M Zn(CF3SO3)2 electrolyte displays high specific capacity(355.2 mAh g^(-1) at 0.2 A g^(-1)),great rate capability(240.8 mAh g^(-1) at 5 A g^(-1)),and excellent cyclability(97.7% capacity retention over 2000 cycles).Such superior performances are ascribed to fast electrochemical kinetics,outstanding electrode/electrolyte interface stability,and nearly dendrite-free ***,when ZnSO4 or Zn(ClO4)2 is used to replace Zn(CF3SO3)2,the electrochemical performances become much inferior,due to the slow electrochemical kinetics,inhomogeneous Zn stripping/plating process,and the formation of large dendrites and *** work not only discloses a high-performance cathode material for aqueous zinc-ion batteries but also offers a reference for the choice of electrolyte salt.

关键词： Calcium vanadate hydrates Electrolytes Interfacial stability Zn-ion batteries Aqueous energy storage

VALUE DISTRIBUTION OF MEROMORPHIC SOLUTIONS OF CERTAIN NON-LINEAR DIFFERENCE EQUATIONS

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Acta Mathematica Scientia 2019年第4期39卷 1173-1184页

作者： minfeng chen Zongsheng GAO Jilong ZHANG School of Mathematics and Statistics Guangdong University of Foreign Studies Guangzhou 510006 China LMIB and School of Mathematics and Systems Science Beihang University Beijing 100191 China

In this article, we consider the non-linear difference equation(f(z + 1)f(z)-1)(f(z)f(z-1)-1) =P(z, f(z))/Q(z, f(z)),where P(z, f(z)) and Q(z, f(z)) are relatively prime polynomials in f(z) with rational coefficients. For the above equation, the order of growth, the exponents of convergence of zeros and poles of its transcendental meromorphic solution f(z), and the exponents of convergence of poles of difference △f(z) and divided difference △f(z)/f(z)are estimated. Furthermore, we study the forms of rational solutions of the above equation.

关键词： Non-linear difference equation meromorphic solution rational solution value dist ribution

Enabling structural and interfacial stability of 5 V spinel LiNi0.5Mn1.5O4 cathode by a coherent interface

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Journal of Energy Chemistry 2023年第1期76卷 266-276,I0007页

作者： Min Xu Ming Yang minfeng chen Lanhui Gu Linshan Luo Songyan chen Jizhang chen Bo Liu Xiang Han College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037JiangsuChina College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina College of Mathematics and Physics Jingangshan UniversityJi'an 343009JiangxiChina Department of Physics Jiujiang Research Institute Xiamen UniversityXiamen 361005FujianChina

Spinel LiNi_(0.5)Mn_(1.5)O_(4)(LNMO),a 5 V class high voltage cathode,has been regarded as an attractive candidate to further improve the energy density of lithium-ion *** issue simultaneously enabling side stability and maintaining high interfacial kinetics,however,has not yet been ***,we design a coherent Li_(1.3)A_(l0.3)Ti_(1.7)(PO)_(4)(LATP)layer that is crystally connected to the spinel LNMO host lattices,which offers fast lithium ions transportation as well as enhances the mechanical stability that prevents the particle ***,the inactive Li_(3)BO_(3)(LBO)coating layer inhibits the corrosion of transition metals and continuous side ***,the coherent-engineered LNMO-LATPLBO cathode material exhibits superior electrochemical cycling stability in a window of 3.0–5.0 V,for example a high-capacity retention that is 89.7%after 500 cycles at 200 m A g-1obtained and enhanced rate performance(85.1 m A h g^(-1)at 800 m A g^(-1))when tested with a LiPF6-based carbonate *** work presents a new approach of engineering 5 V class spinel oxide cathode that combines interfacial coherent crystal lattice design and surface coating.

关键词： Lithium-ion battery Spinel cathode LATP Coherent interface

Li-MOF-based ions regulator enabling fast-charging and dendrite-free lithium metal anode

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Chinese Chemical Letters 2023年第2期34卷 489-494页

作者： Xiang Han Tiantian Wu Lanhui Gu minfeng chen Jianzhong Song Dan Tian Jizhang chen College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China

Li metal has been regarded as the holy grail for the next-generation Li-ion *** dendrites issues,however,impede its practical *** general,prolonging the sand time of Li nucleation and regulating homogeneous Li^(+) flux are effective approaches to suppress the dendrites formation and *** this view,a functional polypropylene (PP) separator is developed to regulate ion transportation via a newly designed Li-based metal-organic framework (Li-MOF) *** Li-MOF crystallizes in the orthorhombic space group P212121 and features a double-walled three-dimensional (3D) structure with 1D *** well-defined intrinsic nanochannels of Li-MOF and the steric-hinerance effect both restrict free migration of anions,contributing to a high Li^(+) transference number of 0.65,which improve the Sand time of Li ***,the Li-MOF coating with uniform porous structure promotes homogeneous Li^(+) flux at the surface of Li ***,the Li-MOF coating layer helps to build solid-electrolyte interphase (SEI) layer that comprises of inorganic Li F and Li_(3)N,which further prohibits the dendrites ***,a highly stable Li plating/stripping cycling for over 1000 h is *** functional separator also enables high-performance full lithium metal cells,the high-rate and long-stable cycling performance of Li Ni_(0.8)Mn_(0.1)Co_(0.1)(NMC811)-Li and Li Co O_(2)(LCO)-Li cells further demonstrate the feasibility of this concept.

关键词： Lithium-ion battery Li metal anode Metal-organic framework Li ions flux Solid-electrolyte interphase

Pressure Transient Analysis of Arbitrarily Shaped Fractured Reservoirs

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Petroleum Science 2007年第2期4卷 66-70页

作者： Gao Huimei He Yingfu Jiang Hanqia chen minfeng School of Petroleum Engineering China University of Petroleum Beijing 102249 China Institute of Porous Flow ＆ Fluid Mechanics CNPC ＆ Chinese Academy of Sciences Langfang Hebei 065007 China Center for Enhanced Oil Recovery China University of Petroleum Beijing 102249 China

Reservoir boundary shape has a great influence on the transient pressure response of oil wells located in arbitrarily shaped reservoirs. Conventional analytical methods can only be used to calculate transient pressure response in regularly shaped reservoirs. Under the assumption that permeability varies exponentially with pressure drop, a mathematical model for well test interpretation of arbitrarily shaped deformable reservoirs was established. By using the regular perturbation method and the boundary element method, the model could be solved. The pressure behavior of wells with wellbore storage and skin effects was obtained by using the Duhamel principle. The type curves were plotted and analyzed by considering the effects of permeability modulus, arbitrary shape and impermeable region.

关键词： Deformable reservoir double-porosity reservoir boundary element method transient pressure type curve

Liquid-phase sintering enabling mixed ionic-electronic interphases and free-standing composite cathode architecture toward high energy solid-state battery

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Nano Research 2022年第7期15卷 6156-6167页

作者： Xiang Han Weijun Zhou minfeng chen Linshan Luo Lanhui Gu Qiaobao Zhang Jizhang chen Bo Liu Songyan chen Wenqing Zhang College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China Department of Physics Xiamen UniversityXiamen 361005China College of Mathematics and Physics Jinggangshan UniversityJi’an 343009China Department of Materials Science and Engineering College of MaterialsXiamen 361005China Department of Physics Southern University of Science and TechnologyShenzhen 518055China

Solid-state batteries(SSBs)will potentially offer increased energy density and,more importantly,improved safety for next generation lithium-ion(Li-ion)*** enabling technology is solid-state composite cathodes with high operating voltage and area *** composite cathode manufacturing technologies,however,suffer from large interfacial resistance and low active mass loading that with excessive amounts of polymer electrolytes and conductive ***,we report a liquidphase sintering technology that offers mixed ionic-electronic interphases and free-standing electrode architecture design,which eventually contribute to high area capacity.A small amount(~4 wt.%)of lithium hydroxide(LiOH)and boric acid(H_(3)BO_(3))with low melting point are utilized as sintering additives that infiltrate into single-crystal Ni-rich LiNi_(0.8)Mn_(0.1)Co_(0.1)(NMC811)particles at a moderately elevated temperature(~350℃)in a liquid state,which not only enable intimate physical contact but also promote the densification *** addition,the liquid-phase additives react and transform to ionic-conductive lithium boron oxide,together with the indium tin oxide(ITO)nanoparticle coating,mixed ionic-electronic interphases of composite cathode are successfully ***,the liquid-phase sintering performed at high-temperature(~800℃)also enables the fabrication of highly dense and thick composite cathodes with a novel free-standing *** promising performance characteristics of such composite cathodes,for example,delivering an area capacity above 8 mAh·cm^(−2) within a wide voltage window up to 4.4 V,open new opportunities for SSBs with a high energy density of 500 Wh·kg^(−1) for safer portable electronic and electrical transport.

关键词： solid-state battery single-crystal Ni-rich LiNi_(0.8)Mn_(0.1)Co_(0.1) liquid-phase sintering mixed ionic-electronic interphases freestanding architecture