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| 1 | A Mini-Review on Metal Recycling from Spent Lithium Ion Batteries显示文摘 | Xiaohong Zheng Zewen Zhu Xiao Lin Yi Zhang Yi He Hongbin Cao Zhi Sun | 2018 | Engineering2018，4，3： | 33 |
| 2 | Microencapsulated ammonium polyphosphate by polyurethane with segment of dipentaerythritol and its application in flame retardant polypropylene显示文摘Dipentaerythritol(DPER),4,40-diphenylmethanediisocyanate(MDI)and melamine(MEL)are used as raw materials to microencapsulate ammonium polyphosphate(MAPP)in situ polymerization.The MAPP is characterized by Fourier transform infrared(FT-IR),scanning electron microscopy(SEM),transmission electron microscopy(TEM)and thermal gravimetric analysis(TGA).The results show that the coating operation can effectively improve water resistance of ammonium polyphosphate(APP),and MAPP has higher residual rate than that of APP after combustion.The flame retardant action of MAPP and APP in polypropylene(PP)is investigated by the limited oxygen index(LOI),vertical burning test(UL-94),TGA,SEM,and cone calorimeter test(CCT).The LOI value of the PP/MAPP composite at the same loading is higher than that of PP/APP composite.UL 94 ratings of PP/MAPP composites are raised to V-0 at 20 wt%loading.The results of CCT also show that MAPP is more efficient than APP.The morphological structures observed by digital photos and SEM demonstrated that MAPP could be promoted to form the continuous and compact intumescent char layer.The flame retardant mechanism of PP/MAPP is also discussed. | Shouwu Yu Shujuan Xiao Zewen Zhao Xiaowen Huo Junfu Wei | 2019 | Chinese Journal of Chemical Engineering2019，27，7： | 6 |
| 3 | Material exploration via designing spatial arrangement of octahedral units: a case study of lead halide perovskites显示文摘Halide perovskites have attracted tremendous attention as semiconducting materials for various optoelectronic applications.The functional metal-halide octahedral units and their spatial arrangements play a key role in the optoelectronic properties of these materials.At present,most of the efforts for material exploration focus on substituting the constituent elements of functional octahedral units,whereas designing the spatial arrangement of the functional units has received relatively little consideration.In this work,via a global structure search based on density functional theory(DFT),we discovered a metastable three-dimensional honeycomb-like perovskite structure with the functional octahedral units arranged through mixed edge-and comer-sharing.We experimentally confirmed that the honeycomb-like perovskite structure can be stabilized by divalent molecular cations with suitable size and shape,such as 2,2’-bisimidazole(BIM).DFT calculations and experimental characterizations revealed that the honeycomb-like perovskite with the formula of BIMPb2l6,synthesized through a solution process,exhibits high electronic dimensionality,a direct allowed bandgap of 2.1 eV,small effective masses for both electrons and holes,and high optical absorption coefficients,which indicates a significant potential for optoelectronic applications.The employed combination of DFT and experimental study provides an exemplary approach to explore prospective optoelectronic semiconductors via spatially arranging functional units. | Pengfei FU Sanlue HU Jiang TANG Zewen XIAO | 2021 | Frontiers of Optoelectronics2021，14，2： | 3 |
| 4 | Antimony doped Cs2SnCl6 with bright and stable emission显示文摘Lead halide perovskites,with high photoluminescence efficiency and narrow・band emission,are promising materials for display and lighting.However,the lead toxicity and environmental sensitivity hinder their potential applications.Herein,a new antimony・doped lead-free inorganic perovskites variant Cs2SnCl6:xSb is designed and synthesized.The perovskite variant Cs2SnCl6:xSb exhibits a broadband orange-red emission,with a photoluminescence quantum yield(PLQY)of 37%.The photoluminescence of Cs2SnCl6:xSb is caused by the ionoluminescence of Sb3+within Cs2SnCl6 matrix,which is verified by temperature dependent photoluminescence(PL)and PL decay measurements.In addition,the all inorganic structure renders Cs2SnCl6:xSb with excellent thermal and water stability.Finally,a white light-emitting diode(white-LED)is fabricated by assembling Cs2SnCl6:0.59%Sb,Cs2SnCl6:2.75%Bi and Ba2Sr2SiO4:Eu2+onto the commercial UV LED chips,and the color rendering index(CRI)reaches 81. | Jinghui LI Zhifang TAN Manchen HU Chao CHEN Jiajun LUO Shunran LI Liang GAO Zewen XIAO Guangda NIU Jiang TANG | 2019 | Frontiers of Optoelectronics2019，12，4： | 2 |
| 5 | Growth of High-Quality SnS Epitaxial Films by H2S Flow Pulsed Laser Deposition显示文摘 | Ran Fan-Yong Xiao Zewen Hiramatsu Hidenori | 2014 | Applied physics letters2014，，： | 1 |
| 6 | Identifying quasi-2D and 1D electrides in yttrium and scandium chlorides via geometrical identification显示文摘Developing and understanding electron-rich electrides offers a promising opportunity for a variety of electronic and catalytic applications.Using a geometrical identification strategy,here we identify a new class of electride material,yttrium/scandium chlorides Y(Sc)_(x)Cl_(y)(yx<2).Anionic electrons are found in the metal octahedral framework topology.The diverse electronic dimensionality of these electrides is quantified explicitly by quasi-two-dimensional(2D)electrides for[YCl]^(+)∙e−and[ScCl]^(+∙)e−and one-dimensional(1D)electrides for[Y_(2)Cl_(3)]^(+)∙e−,[Sc_(7)Cl_(10)]^(+)∙e−,and[Sc5Cl8]2+∙2e−with divalent metal elements(Sc^(2+):3d^(1) and Y^(2+):4d^(1)).The localized anionic electrons were confined within the inner-layer spaces,rather than inter-layer spaces that are observed in A_(2)B-type 2D electrides,e.g.Ca_(2)N.Moreover,when hydrogen atoms are introduced into the host structures to form YClH and Y2Cl3H,the generated phases transform to conventional ionic compounds but exhibited a surprising reduction of work function,arising from the increased Fermi level energy,contrary to the conventional electrides reported so far.Y_(2C)l_(3) was experimentally confirmed to be a semiconductor with a band gap of 1.14 eV.These results may help to promote the rational design and discovery of new electride materials for further technological applications. | Biao Wan Yangfan Lu Zewen Xiao Yoshinori Muraba Junghwan Kim Dajian Huang Lailei Wu Huiyang Gou Jingwu Zhang Faming Gao Ho-kwang Mao Hideo Hosono | 2018 | npj Computational Materials2018，，1： | 0 |
| 7 | Atomic mechanisms of hexagonal close-packed Ni nanocrystallization revealed by in situ liquid cell transmission electron microscopy显示文摘The fundamental understanding of the mechanism underlying the early stages of crystallization of hexagonal-close-packed(hcp)nanocrystals is crucial for their synthesis with desired properties,but it remains a significant challenge.Here,we report using in situ liquid cell transmission electron microscopy(TEM)to directly capture the dynamic nucleation process and track the real-time growth pathway of hcp Ni nanocrystals at the atomic scale.It is demonstrated that the growth of amorphous-phase-mediated hcp Ni nanocrystals is from the metal-rich liquid phases.In addition,the reshaped preatomic facet development of a single nanocrystal is also imaged.Theoretical calculations further identify the non-classical features of hcp Ni crystallization.These discoveries could enrich the nucleation and growth model theory and provide useful information for the rational design of synthesis pathways of hcp nanocrystals. | Junyu Zhang Miao Li Zewen Kang Bensheng Xiao Haichen Lin Jingyu Lu Haodong Liu Xue Zhang Dong-Liang Peng Qiaobao Zhang | 2022 | Nano Research2022，15，7： | 0 |
| 8 | Decomposition pathway and stabilization of ether-based electrolytes in the discharge process of Li-O_(2) battery显示文摘Ether-based electrolytes with relatively high stability are widely used in Li-O_(2) batteries (LOBs) with high energy density.However,they are still prone to be attacked by reactive oxygen species.Understanding the degradation chemistry of ether-based solvent induced by reactive oxygen species is significant importance toward selection of stable electrolytes for LOBs.Herein,we demonstrate that a great amount of H_(2) gas evolves on the Li anode during the long-term discharge process of LOBs,which is due to the electrolyte decomposition at the oxygen cathode.By coupling with in-situ and ex-situ characterization techniques,it is demonstrated that O_(2)^(-) induces the H-abstraction of tetraethylene glycol dimethyl ether(TEGDME) to produce a large amount of H_(2)O at cathode,and this H_(2)O migrates to Li anode and produce H_(2) gas.Based on the established experiments and spectra,a possible decomposition pathway of TEGDME caused by O_(2)^(-)at the discharge process is proposed.And moreover,three types of strategies are discussed to inhibit the decomposition of ether-based electrolytes,which should be highly important for the fundamental and technical advancement for LOBs. | Xiao Liu Xiaosheng Song Qi Zhang Xuebing Zhu Qing Han Zewen Liu Peng Zhang Yong Zhao | 2022 | Journal of Energy Chemistry2022，31，6： | 0 |
| 9 | Building Better Full Manganese‑Based Cathode Materialsfor Next‑Generation Lithium‑Ion Batteries显示文摘Lithium-manganese-oxides have been exploited as promising cathode materials for many years due to their environmental friendliness,resource abundance and low biotoxicity.Nevertheless,inevitable problems,such as Jahn-Teller distortion,manganese dissolution and phase transition,still frustrate researchers;thus,progress in full manganese-based cathode materials(FMCMs)has been relatively slow and limited in recent decades.Recently,with the fast growth of vehicle electrification and large-scale energy-storage grids,there has been an urgent demand to develop novel FMCMs again;actually,new waves of research based on FMCMs are being created.Herein,we systematically review the history of FMCMs,correctly describe their structures,evaluate the advantages and challenges,and discuss the resolution strategies and latest developments.Additionally,beyond FMCMs,a profound discussion of current controversial issues,such as oxygen redox reaction,voltage decay and voltage hysteresis in Li_(2)MnO_(3)-based cathode materials,is also presented.This review summarizes the effectively optimized approaches and offers a few new possible enhancement methods from the perspective of the electronic-coordination-crystal structure for building better FMCMs for next-generation lithium-ion batteries. | Jin Song Hangchao Wang Yuxuan Zuo Kun Zhang Tonghuan Yang Yali Yang Chuan Gao Tao Chen Guang Feng Zewen Jiang Wukun Xiao Tie Luo Dingguo Xia | 2023 | Electrochemical Energy Reviews2023，6，1： | 0 |
| 10 | Understanding the growth mechanisms of metal-based core–shell nanostructures revealed by in situ liquid cell transmission electron microscopy显示文摘Metal-based core-shell nanostructures have garnered enduring interest due to their unique properties and functionalities.However,their growth and transformation mechanisms in liquid media remain largely unknown because they lack direct observation of the dynamic growth process with high spatial and temporal resolution.Developing the in situ liquid cell transmission electron microscopy(TEM)technique offers unprecedented real-time imaging and spectroscopy capabilities to directly track the evolution of structural and chemical transformation of metal-based core–shell nanostructures in liquid media under their working condition.Here,this review highlights recent progress in utilizing in situ liquid cell TEM characterization technique in investigating the dynamic evolution of material structure and morphology of metal-based core–shell nanostructures at the nano/atomic scale in real-time.A brief introduction of the development of liquid cells for in situ TEM is first given.Subsequently,recent advances in in situ liquid cell TEM for the fundamental study of growth mechanisms of metal based core–shell nanostructures are discussed.Finally,the challenge and future developments of metalbased core–shell nanostructures for in situ liquid cell TEM are proposed.Our review is anticipated to inspire ongoing interest in revealing unseen growth dynamics of core–shell nanostructures by in situ liquid cell TEM technique. | Junyu Zhang Bensheng Xiao Junhui Zhao Miao Li Haichen Lin Zewen Kang Xianwen Wu Haodong Liu Dong-Liang Peng Qiaobao Zhang | 2022 | Journal of Energy Chemistry2022，31，8： | 0 |
| 11 | Hierarchical structural complexity in atomically precise nanocluster frameworks显示文摘The supramolecular chemistry of nanoclusters is a flourishing area of nano-research;however,the controllable assembly of cluster nano-building blocks in different arrays remains challenging.In this work,we report the hierarchical structural complexity of atomically precise nanoclusters in micrometric linear chains(1 D array),grid networks(2 D array) and superstructures(3 D array).In the crystal lattice,the Ag_(29)(SSR)_(12)(PPh3)4 nanoclusters can be viewed as unassembled cluster dots(Ag_(29)-OD).In the presence of Cs^(+) cations,the Ag_(29)(SSR)_(12) nano-building blocks are selectively assembled into distinct arrays with different oxygen-carrying solvent molecules—Cs@Ag_(29)(SSR)_(12)(DMF)x as 1 D linear chains(Ag_(29)-1 D),Cs@Ag_(29)(SSR)_(12)(NMP)x as 2 D grid networks(Ag_(29)-2 D),and Cs@Ag_(29)(SSR)_(12)(TMS)_(x) as 3 D superstructures(Ag_(29)-3 D).Such self-assemblies of these Ag_(29)(SSR)_(12) units have not only been observed in their crystalline state,but also in their amorphous state.Due to the diverse surface structures and crystalline packing modes,these Ag_(29)-based assemblies manifest distinguishable optical absorptions and emissions in both solutions and crystallized films.Furthermore,the surface areas of the nanocluster crystals are evaluated,the maximum value of which occurs when the cluster nano-building blocks are assembled into 2 D arrays(i.e.Ag_(29)-2 D).Overall,this work presents an exciting example of the hierarchical assembly of atomically precise nanoclusters by simply controlling the adsorbed molecules on the cluster surface. | Xiao Wei Xi Kang Zewen Zuo Fengqi Song Shuxin Wang Manzhou Zhu | 2021 | National Science Review2021，8，3： | 0 |
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