首页期刊导航|中国化学快报（英文版）
期刊信息/Journal information
中国化学快报（英文版）
中国化学快报（英文版）

梁晓天

月刊

1001-8417

cclbj@imm.ac.cn

010-63165638

100050

北京市先农坛街1号

中国化学快报（英文版）/Journal Chinese Chemical LettersCSCDCSTPCD北大核心SCI
查看更多>>本刊是由中国科协主管、中国化学会主办、中国医学科学院药物所承办的学术期刊，是由著名化学家梁晓天院士主编。是中国化学界通向世界的窗口，内容覆盖化学全领域。本刊的办刊宗旨是“新、快、准”，我们将坚持这个宗旨，力求及时反映化学研究中各个相关领域内的最新进展及热点问题，主要读者群是科研人员、研究生、大学教师。现已被国内外多家数据库收录，如SCI　Search、Chemical Abstract、Research Alert、Chemistry Citation Index、《日本科技文献速报》、万方数据数字化期刊群、中国学术期刊过刊全文数据库、中国学术期刊（光盘版）、中国学术期刊文摘、中文期刊全文数据库、俄罗斯Рж期刊源等。
正式出版
收录年代

    Plasma enhanced reduction method for synthesis of reduced graphene oxide fiber/Si anode with improved performance

    Yihong LiZhong QiuLei HuangShenghui Shen...
    505-511页
    查看更多>>摘要：Silicon(Si)is considered as one of the most promising anode materials for advanced lithium-ion batter-ies due to its high theoretical capacity,environmental friendliness,and widespread availability.However,great challenges such as volumetric expansion,limited ionic/electronic conductivity properties and com-plex manufacturing processes hinder its practical applications.Herein,a novel plasma-enhanced reduced graphene oxide fibers/Si(PrGOFs/Si)composite anode is first proposed by using wet-spinning technology followed by plasma-enhanced reduction method.The PrGOFs provide large space to accommodate the volume expansion of Si nanoparticles(SiNPs)by forming a flexible 3D conductive network.Compared to the conventional thermally reduced graphene oxide fibers/Si(TrGOFs/Si)sample,the PrGOFs/Si anodes demonstrate higher conductivity,specific surface area,and superior fabrication efficiency.Accordingly,the PrGOFs/Si anodes exhibit a reversible capacity of 698.3 mAh/g,and maintain a specific capacity of 602.5 mAh/g at a current density of 200mA/g after 100 cycles,superior to conventional TrGOFs/Si counter-parts.This research presents a novel strategy for the preparation of high-performance Si/carbon anodes for energy storage applications.
      原文链接:
    • 万方数据
    • 维普

    SOMO-HOMO level conversion in triarylmethyl-cored N-heterocyclic carbene-Au(Ⅰ)complexes triggered by selecting coordination halogens

    Le ZhangHui-Yu XieXin LiLi-Ying Sun...
    512-516页
    查看更多>>摘要：Conventionally,organic radicals adhere to the Aufbau principle,the energy level of the singly occupied molecular orbital(SOMO)is not below the highest occupied molecular orbital(HOMO),but somewhat abnormal phenomena have appeared recently.In this study,we introduce a novel strategy by incorporat-ing unique NHC-Au-X units into a tris(2,4,6-trichlorophenyl)methyl(TTM)system to create metal-involved open-shell complexes,denoted as TTM-NHC-Au-X(X=I,Br,or Cl).Density-functional theory calculations were used to predict an inversion in the energy of the SOMO and highest doubly occupied molecular orbital(HOMO)of TTM-NHC-Au-I,which is supported by experimental results.Organometallic radicals TTM-NHC-Au-X demonstrated distinct properties with different coordinated halides.The radical behav-iors have been investigated by EPR,UV-vis spectroscopy and cyclic voltammetry,additional structural information provided by structurally comparing related the precursor complexes given by X-ray crys-tallography.TTM-NHC-Au-I with SOMO-HOMO conversion(SHC)features a highly thermal decomposi-tion temperature up to 305 ℃.Furthermore,the photostability of TTM-NHC-Au-l was found to be 75 and 23 times greater than that of TTM-NHC-Au-Br and TTM-NHC-Au-Cl,respectively.These findings pro-vide valuable insights into the structural and electronic design principles governing the occurrence of SOMO-HOMO conversion in open-shell systems.
      原文链接:
    • 万方数据

    Ultrafast synthesis of nanocrystalline spinel oxides by Joule-heating method

    Wenxuan YangLong ShangXiaomeng LiuSihan Zhang...
    517-521页
    查看更多>>摘要：Spinel oxides,with the formula AB2O4(A and B represent metal ions)perform superior electrocatalytic characteristic when A and B are transition metals like Co,Fe,Mn,etc.Abundant researches have been attached to the structure designments while methods are often energy-intensive and inefficient.Here,we devised a universal strategy to achieve rapid synthesis of nanocrystalline spinel materials with mul-tiple components(Co3O4,Mn3O4,CoMn2O4 and CoFe2O4 are as examples),where phase formation is within 15 s.Under the Joule-heating shock,a crack-break process of microcosmic phase transformation is observed by in-situ transmission electron microscopy.The half-wave potential values of Co3O4-JH,Mn3O4-JH,CoMn2O4-JH and CoFe2O4-JH in the electrocatalytic oxygen reduction reaction were 0.77,0.78,0.79 and 0.76,respectively.This suggests that the Joule heating is a fast and efficient method for the preparation of spinel oxide electrocatalysts.
      原文链接:
    • 万方数据
    • 维普

    In situ constructing(MnS/Mn2SnS4)@N,S-ACTs heterostructure with superior Na/Li-storage capabilities in half-cells and pouch full-cells

    Dai-Huo LiuAo WangHong-Yan LüXing-Long Wu...
    522-527页
    查看更多>>摘要：Effective design of nanoheterostructure anode with high ion/electron migration kinetics can give electrode with superior electrochemical performance.However,the design and preparation of nanoheterostruc-ture composites with high-capacity and long cycling life in half and pouch full cells remain a big chal-lenge.Here,a novel micro-pore MnS/Mn2SnS4 heterostructure nanowire were in situ encapsulated into the N and S elements co-doped amorphous carbon tubes(abbreviated as(MnS/Mn2SnS4)@N,S-ACTs)and showed superior energy storage properties in Na-/Li-ion half cells and pouch full cells.The Na-/Li-storage capabilities improvement are attribute to the strong synergistic effect between MnS/Mn2SnS4 heterostruc-ture and N,S-ACTs protective layer,the former induces an local built-in electric field between Mn2SnS4 and MnS during charging/discharging,accelerating interfacial ion/electron diffusion dynamics,the latter effective maintains the morphology and volume evolution during Na+/Li+charging/discharging,achieving a long-term cycling stability(e.g.,high discharge capacity of 79.2 mAh/g with the capacity retention of 79.3％can be gained after 2200 cycles at 3 C in(MnS/Mn2SnS4)@N,S-ACTs//LiFePO4 pouch full cells;a high capacity of～34 mAh/g at 10 C can be got with a Coulombic efficiency of 100％after 1000 cycles in pouch(MnS/Mn2SnS4)@N,S-ACTs//Na3V2(PO4)2O2F full cells.
      原文链接:
    • 万方数据

    Synergizing 3D-printed structure and sodiophilic interface enables highly efficient sodium metal anodes

    Changyuan BaoYunpeng JiangHaoyin ZhongHuaizheng Ren...
    528-534页
    查看更多>>摘要：Sodium(Na)metal batteries have gained increasing attention more recently,owing to their high energy densities and cost efficiencies,but are severely handicapped by the unsatisfactory Coulombic efficiency(CE)and cycling stability stemming from dendrite growth on Na anodes.In this study,we developed a strategy of direct ink writing(DIW)3D printing combined with electroless deposition to construct a hi-erarchical Cu grid coated with a dense nanoscale Ag interfacial layer as the host material for Na plating.The sodiophilic Ag interface contributes to a fall in the Na nucleation energy,hence enabling uniform Na deposition on each 3D-printed filament.The constructed 3D-printed structure can effectively mod-erate the electric-field distribution and lower the local current density for relieving Na inhomogeneous growth,as confirmed by finite element simulation and Na plating/stripping morphology evolution results.In particular,the unique 3D structure also promotes the lateral growth of Na,thus the volume change of Na metal was accommodated to stabilize the solid electrolyte interphase(SEI).As a result,the CE of the half-cell can reach 99.9％at the current density of 1 mA/cm2 after 300 cycles and the full-cell exhibits outstanding electrochemical performance(capacity retention of 91.0％after 500 cycles at 2 C).
      原文链接:
    • 万方数据
    • 维普

    Conductive composite binder for recyclable LiFePO4 cathode

    Wendi DouGuangying WanTiefeng LiuLin Han...
    535-538页
    查看更多>>摘要：In order to solve the problem of poor conductivity of traditional LiFePO4 cathode binders,we developed sodium alginate-Congo red copolymers(SA-CR)as water-soluble electrically conductive and mechanically robust composite binder.Unlike most other electrically conductive polymer binders,the procedure is straightforward and low-cost to prepare SA-CR binder.Various SA-CR copolymers were prepared with different degree of compounding of CR to investigate the effect of CR on the electrochemical and phys-ical properties of the prepared electrodes.The copolymer whose composition was filled with a mixture of SA and CR at a 3:1 mass ratio showed the best cell performance,due to the well-balanced electri-cal conductivity and mechanical properties.It exhibited a specific capacity of 118.8 mAh/g at the 100th cycle with 92.1％capacity retention,significantly better than the 108.5 mAh/g of conventional acetylene black electrodes.CR as a conduction-promoting agent in water-soluble composite binder favors the for-mation of continuous and homogenous conducting bridges throughout the electrode and increases the compaction density of electrode by reducing the conducting agent content of acetylene black and thus the improvement of electrode performance is realized.
      原文链接:
    • 万方数据

    Effect of surface oxidation on the interfacial and mechanical properties in graphite/epoxy composites composite bipolar plates

    Dongmei YaoJunsheng ZhengLiming JinXiaomin Meng...
    539-542页
    查看更多>>摘要：Epoxy resin-reinforced graphite composites have found extensive application as bipolar plates in fuel cells for stationary power supplies,valued for their lightweight nature and exceptional durability.To enhance the interfacial properties between graphite and epoxy resin(EP),surface oxidation of graphite was carried out using diverse functional groups.Experimental assessments illustrated that the composites with graphite oxide resulted in heightened mechanical strength and toughness compared to pristine graphite,which could be attributed to the excellent interface connection.Moreover,these composites displayed remarkable conductivity while simultaneously retaining their mechanical attributes.Furthermore,molecular dynamics simulations outcomes unveiled that the inclusion of oxygen-containing functional groups on the graphite surface augmented the interfacial energy with EP,and the interface morphology between graphite and resin exhibited heightened stability throughout the stretching process.This simple and effective technique presents opportunities for improving composites interfaces,enabling high load transfer efficiency,and opens up a potential path for developing strong and tough composite bipolar plates for fuel cells.
      原文链接:
    • 万方数据
    • 维普

    Facile synthesis of porous TiO2/SnO2 nanocomposite as lithium ion battery anode with enhanced cycling stability via nanoconfinement effect

    Xingang KongYabei SuCuijuan XingWeijie Cheng...
    543-548页
    查看更多>>摘要：SnO2 is a potential anode material with high theoretical capacity for lithium-ion batteries(LIBs),however,its applications have been limited by the severe volume expansion during charging-discharging process.In this work,an inverse opal TiO2/SnO2 composite with an interconnect network nanostructure was de-signed to confine SnO2 nanoparticles in the porous TiO2.Due to this nanoconfinement structure,the volume expansion in the process was effectively alleviated,therefore the safety performance and cycling stability of the battery were effectively improved.At the same time,with a large number of microporous structures in the framework,the appearance of pseudocapacitance improves the rate performance and reversible capacity.In terms of electrochemical kinetics,its framework provides the connected path for charge migration,effectively reducing the charge transfer impedance,meanwhile,quantities of microp-ores in its skeleton could provide a smoother channel for lithium ions,thus greatly improving the dif-fusion rate of LIBs.The design of this nanostructure provides a new idea for the research of SnO2-based anode with effectively enhanced electrochemical performance,which is promising anode for practical ap-plication.
      原文链接:
    • 万方数据

    Surface decoration prompting the decontamination of active sites in high-temperature proton exchange membrane fuel cells

    Jiaqi LinPupu YangYimin JiangShiqian Du...
    549-553页
    查看更多>>摘要：In electrochemical energy devices,the operating conditions always exert enormous influence on electro-catalysts'performances.Phosphoric acid(PA),acted as the proton carriers,can be adsorbed on Pt surface,block active sites and affect the electronic structure of Pt unfavorably,which severely restricts the per-formance of high-temperature proton exchange membrane fuel cells(HT-PEMFCs).Herein,simply basic organic compounds,such as dicyandiamide(DCD),melamine(Mel)and cyanuric acid(CA),are decorated on Pt surface(DCD-Pt/C,Mel-Pt/C and CA-Pt/C)to induce the adsorption transfer of proton carriers.The decoration can not only inject electrons to Pt and enhance oxygen reduction reaction(ORR)activity but also can induce PA to transfer from Pt surface to organic compounds,decontaminating active sites.In addition,the organic compounds with the larger conjugated system and the smaller electronegativity of ligating atoms would have a greater interaction with Pt,causing a larger decoration amount on Pt surface,which leads to more excellent ORR activity and resistance to PA blockage effect.Therefore,Mel-Pt/C shows a peak power density of 629mW/cm2,exceeding commercial Pt/C(437mW/cm2),DCD-Pt/C(539mW/cm2)and CA-Pt/C(511 mW/cm2)with the same loading.
      原文链接:
    • 万方数据
    • 维普

    Controlled synthesis and excellent magnetism of ferrimagnetic NiFe2Se4 nanostructures

    Juanjuan WangFang WangBin QinYue Wu...
    554-558页
    查看更多>>摘要：3d transition metal chalcogenides have attracted much attention due to their unique magnetic properties.Although various Cr,V,and Fe-based chalcogenides have been fabricated recently,the limited Curie tem-perature(Tc)still hinders their practical application.Based on the structural and magnetic advantages of MFe2O4 and Fe3Se4,we developed a one-pot solution synthesis method for the fabrication of NiFe2Se4 nanostructures with structural continuity,to facilitate the investigation of their magnetic properties.No-tably,the morphology of NiFe2Se4 can be controlled from nano-rods to nano-platelets by controlling the growth direction.The coercivity(Hc)of NiFe2Se4 with nano-cactus structure exhibits a maximum of 12.77 kOe at 5K.The coercivity of ferrimagnetic NiFe2Se4 nano-platelets can be further adjusted to 1.52 kOe at room temperature.These results show that the magnetic properties of NiFe2Se4 can be significantly modified by controlling their morphologies.We also extend the method to the synthesis of CoFe2Se4 nano-cactus with an ultrahigh coercivity of 17.85 kOe at 5K.Obviously,the synthesis strategy and their excellent magnetic properties of MFe2Se4 have sparked interest in ternary transition metal selenides as potential hard magnetic materials.
      原文链接:
    • 万方数据