The synthesis of active electrode materials at room temperature is one of the effective strategies to reduce the fabrication cost of sodium ion batteries(SIBs).Herein,a layered material(Na_(2)[(VO)_(2)(HPO_(4))_(2)C_(...The synthesis of active electrode materials at room temperature is one of the effective strategies to reduce the fabrication cost of sodium ion batteries(SIBs).Herein,a layered material(Na_(2)[(VO)_(2)(HPO_(4))_(2)C_(2)O_(4)]·2H_(2)O,abbreviated as NVPC followingly)with open-framework structures has been successfully prepared at room temperature under ambient conditions and is evaluated as a cathode for SIBs.It is revealed that NVPC cathode can deliver a maximum reversible capacity of ca.70 mAh/g at 10 mA/g,and exhibit superior rate capability and cycling performance:at 50 mA/g,maximum reversible capacity ca.50 m Ah/g with capacity retention of 88.4%over 250 cycles corresponds to only 0.046%capacity decay per cycle;at 100 mA/g,a maximum reversible capacity of 35 mAh/g with capacity retention of60.9%over 500 cycles.This study demonstrates a practical example of a low-cost synthesis of the cathode materials for SIBs.At the same time,the systematic electrochemical research results also show promising prospects for long lifespan low-cost SIBs.展开更多
One novel organically templated zincophophate （CsN2HI4）.[Zn3（OH2）（POn）2（HPO4）] has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction together with elemental a...One novel organically templated zincophophate （CsN2HI4）.[Zn3（OH2）（POn）2（HPO4）] has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction together with elemental analysis, infrared spectroscopy, thermogravimetric analysis, and powder X-ray diffraction. The title compound crystallizes in the monoclinic space group P21/n, with a = 9.7904（11）, b = 14.0287（14）, c = 11.8651（13） A, β= 104.690（3）°, V= 1576.4（3） A^3, Z= 4, T= 296（2） K, Mr = 601.31 and Dc = 2.533 g/cm^3. The compound consists of a macroanionic [Zn3（OH2）（PO4）2（HPO4）]^2- framework and （C5N2H14）^2＋ cations, and its structure is built up from ZnO3（OH2）, ZnO4, HPO4 and PO4 tetrahedral units that result in 4, 8 and 10-ring channels.展开更多
Sodium ion batteries(SIBs)currently lack sufficient anode materials that simultaneously demonstrate exceptional capacity,durability under prolonged cycling,and rapid charging capabilities.Antimony(Sb)has emerged as an...Sodium ion batteries(SIBs)currently lack sufficient anode materials that simultaneously demonstrate exceptional capacity,durability under prolonged cycling,and rapid charging capabilities.Antimony(Sb)has emerged as an attractive alloy-based anode candidate due to its notable theoretical capacity,nevertheless grappling with significant challenges including substantial structural deformation during operation and sluggish ion transport kinetics.Herein,we atomically disperse Sb into open Cu-S frameworks with high cyclic stability and good conductivity.In-situ and ex-situ analyses reveal the multistep reversible reaction processes during the charging(formation of Cu_(3)SbS_(4))and discharging(precipitation of fracture-resistant Na_(3)Sb in the ionic-conductive Na_(x)Cu_(2)S_(2)/Na_(2)S matrix)processes.As a result,the thoughtfully engineered Cu_(3)SbS_(4)anode,without requiring additional carbon compositing,attains a high reversible specific capacity of 597 mAh g^(−1)at a 0.3 C rate.It also maintains approximately 95%capacity retention even at 15 C after 4300 cycles.The assembled Cu_(3)SbS_(4)||Na_(3)V_(2)(PO_(4))_(3)full cell achieves 10 C high rate performance and demonstrates excellent cycling stability of∼94.0%capacity retention after 200 cycles.Our approach to material design might offer a novel method for creating durable,high-capacity,and high-rate anode materials for sodium-ion batteries.展开更多
A novel open-framework vanadium(W) phosphate(H_3NCH_2CH_2NH_3)_3[(VO)_4(PP_4)_2(HPO_4)_4] (short for V_2P_3-en) has been prepared. It issynthesized hydrothermally in the presence of ethylenediamine (en) at 170 deg C f...A novel open-framework vanadium(W) phosphate(H_3NCH_2CH_2NH_3)_3[(VO)_4(PP_4)_2(HPO_4)_4] (short for V_2P_3-en) has been prepared. It issynthesized hydrothermally in the presence of ethylenediamine (en) at 170 deg C for 5 days byself-assembly from structurally simple precursors V_2O_5, H_3PO_4 and H_2O. The compound ischaracterized by means of Fourier transform-infrared spectroscopy (FT-IR),Thermogravimetry-differential thermal analysis (TG-DTA), X-ray powder diffraction analysis (XRD) andScanning electron microscopy (SEM). Furthermore, the composition-structure-thermal stabilityrelation of V_2P_3-en is explored in terms of crystal chemistry, and the potential approach to theenhancement of its thermal stability is proposed.展开更多
Currently,δ-Mn0_(2)is one of the popularly studied cathode materials for aqueous zinc-ion batteries(ZIBs)but impeded by the sluggish kinetics of Zn^(2+)and the Mn cathode dissolution.Here,we report our discovery in t...Currently,δ-Mn0_(2)is one of the popularly studied cathode materials for aqueous zinc-ion batteries(ZIBs)but impeded by the sluggish kinetics of Zn^(2+)and the Mn cathode dissolution.Here,we report our discovery in the study of crystalline/amorphous Mn0_(2)(disordered Mn0_(2)),prepared by a simple redox reaction in the order/disorder engineering.This disordered Mn0_(2)cathode material,having open framework with more active sites and more stable structure,shows improved electrochemical performance in 2 mol L^(-1)ZnSO_(4)/0.1 mol L^(-1)MnS0_(4)aqueous electrolyte.It delivers an ultrahigh discharge specific capacity of 636 mA·h·g^(-1)at 0.1 A·g^(-1)and remains a large discharge capacity of 216 mA·h·g^(-1)even at a high current density of 1 A·g^(-1)after 400 cycles.Hence disordered Mn0_(2)could be a promising cathode material for aqueous ZIBs.The storage mechanism of the disordered Mn0_(2)electrode is also systematically investigated by structural and morphological examinations of ex situ,ultimately proving that the mechanism is the same as that of the δ-Mn0_(2)electrode.This work may pave the way for the possibility of using the order/disorder engineering to introduce novel properties in electrode materials for high-performance aqueous ZIBs.展开更多
Subject Code:E02With the support by the National Natural Science Foundation of China,a study by the research group led by Prof.Li Chilin(李驰麟)from Shanghai Institute of Ceramics,Chinese Academy of Sciences reported ...Subject Code:E02With the support by the National Natural Science Foundation of China,a study by the research group led by Prof.Li Chilin(李驰麟)from Shanghai Institute of Ceramics,Chinese Academy of Sciences reported that a cubic perovskite fluoride can serve as open framework cathode for high-rate展开更多
OPEN Process Framework(OPF)是使软件开发过程达到CMM5级标准的软件工程框架。文中讨论了基于OPF的软件过程的主要元素及实施过程,并把该过程应用于某油田数据采集系统的开发,实践证明基于OPF的软件过程可以提高团队的开发能力、降低...OPEN Process Framework(OPF)是使软件开发过程达到CMM5级标准的软件工程框架。文中讨论了基于OPF的软件过程的主要元素及实施过程,并把该过程应用于某油田数据采集系统的开发,实践证明基于OPF的软件过程可以提高团队的开发能力、降低风险、有效控制资源,为项目的开发提供了高度清晰的过程框架,规范管理和开发流程。展开更多
An open-framework ammonium ferricborophosphate compound was synthesized by mild hydrothermal condition at 110C. The crystal structure has been determined by single-crystal X-ray diffraction analysis: hexagonal, P6522,...An open-framework ammonium ferricborophosphate compound was synthesized by mild hydrothermal condition at 110C. The crystal structure has been determined by single-crystal X-ray diffraction analysis: hexagonal, P6522, a = 9.452(2) , c = 15.698(5) , a = 90, g = 120, Z = 6, Mr = 310.58, V = 1214.0(5) 3, Dc = 2.549 g/cm3, m = 2.311mm-1, F(000) = 930. The chiral tetrahedral-tetrahedral helical ribbons are linked by the mixed valance FeII/FeIIIO6 coordinated octahedra. The ammonium ions are located inside the free loop of helical ribbons close to the inner wall of the helical channels1{[BP2O8]3-}, effecting on balancing charge and stabilizing helical ribbons.展开更多
A novel 3-D inorganic bimetallic compound Ag2Mo2O7 has been hydrothermally synthesized and structurally characterized by X-ray diffraction. The compound crystallizes in monoclinic, space group P21/c with a = 6.1274（3...A novel 3-D inorganic bimetallic compound Ag2Mo2O7 has been hydrothermally synthesized and structurally characterized by X-ray diffraction. The compound crystallizes in monoclinic, space group P21/c with a = 6.1274（3）, b = 13.1836（6）, c = 7.8780（3）A, β= 110.673（3）°, V = 595.42（5）A3, Z= 4, Mr= 519.62, Dc = 5.797g/cm^3, F（000） = 936,μ（MoKα） = 10.579 mm^-1, F（000） = 936, the final R = 0.0204 and wR = 0.0477 for 1268 observed reflections with I〉 2σ（I）. In the title compound, the [Mo4O16]n^8n-chains are linked through O-Ag-O bridging bonds to form a 3D network. It represents an unprecedented linking mode between the isopolyoxomolybdate chain and the transition metal oxide cluster. IR, TGA and fluorescence properties of the title compound are also studied.展开更多
随着数字经济的快速发展,对三维重建技术的需求显著增加。然而,现有商用三维重建系统多依赖于封闭的单机或集群架构,导致灵活性和效率受限,而开源框架在绝对坐标和尺度恢复方面存在不足。对此,提出了一种基于GCP(Ground Control Point)...随着数字经济的快速发展,对三维重建技术的需求显著增加。然而,现有商用三维重建系统多依赖于封闭的单机或集群架构,导致灵活性和效率受限,而开源框架在绝对坐标和尺度恢复方面存在不足。对此,提出了一种基于GCP(Ground Control Point)辅助的Colmap框架中的SFM(Structure from Motion)算法。该算法通过构建残差方程、应用相似变换和全局光束法平差,将Colmap中SFM的自由网结果精确转换为绝对坐标。实验结果表明,该方法在计算精度上与商用系统Agisoft和大疆智图相当,且在尺度恢复上保持了较高的计算效率。所提方法不仅提升了开源三维重建系统的绝对尺度恢复能力,还为未来云端应用和大规模数据处理提供了理论和实践基础。未来将致力于实现全流程自动化三维重建的云架构,并探讨与物联网设备在三维监管中的应用前景。展开更多
基金financially supported by the National Natural Science Foundation of China(No.21805278)。
文摘The synthesis of active electrode materials at room temperature is one of the effective strategies to reduce the fabrication cost of sodium ion batteries(SIBs).Herein,a layered material(Na_(2)[(VO)_(2)(HPO_(4))_(2)C_(2)O_(4)]·2H_(2)O,abbreviated as NVPC followingly)with open-framework structures has been successfully prepared at room temperature under ambient conditions and is evaluated as a cathode for SIBs.It is revealed that NVPC cathode can deliver a maximum reversible capacity of ca.70 mAh/g at 10 mA/g,and exhibit superior rate capability and cycling performance:at 50 mA/g,maximum reversible capacity ca.50 m Ah/g with capacity retention of 88.4%over 250 cycles corresponds to only 0.046%capacity decay per cycle;at 100 mA/g,a maximum reversible capacity of 35 mAh/g with capacity retention of60.9%over 500 cycles.This study demonstrates a practical example of a low-cost synthesis of the cathode materials for SIBs.At the same time,the systematic electrochemical research results also show promising prospects for long lifespan low-cost SIBs.
基金Supported by the Science and Technology Development Foundation of Fuzhou University(No.2004-xq-05)
文摘One novel organically templated zincophophate （CsN2HI4）.[Zn3（OH2）（POn）2（HPO4）] has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction together with elemental analysis, infrared spectroscopy, thermogravimetric analysis, and powder X-ray diffraction. The title compound crystallizes in the monoclinic space group P21/n, with a = 9.7904（11）, b = 14.0287（14）, c = 11.8651（13） A, β= 104.690（3）°, V= 1576.4（3） A^3, Z= 4, T= 296（2） K, Mr = 601.31 and Dc = 2.533 g/cm^3. The compound consists of a macroanionic [Zn3（OH2）（PO4）2（HPO4）]^2- framework and （C5N2H14）^2＋ cations, and its structure is built up from ZnO3（OH2）, ZnO4, HPO4 and PO4 tetrahedral units that result in 4, 8 and 10-ring channels.
基金supported by the National Natural Science Foundation of China(22471283,52202327)the Science and Technology Commission of Shanghai Municipality(22ZR1471300,23DZ1200800)+1 种基金the Natural Science Foundation of Jiangxi Province(20224BAB204002,GJJ211320)the Jingdezhen Science and Technology Bureau(20212GYZD009-15)。
文摘Sodium ion batteries(SIBs)currently lack sufficient anode materials that simultaneously demonstrate exceptional capacity,durability under prolonged cycling,and rapid charging capabilities.Antimony(Sb)has emerged as an attractive alloy-based anode candidate due to its notable theoretical capacity,nevertheless grappling with significant challenges including substantial structural deformation during operation and sluggish ion transport kinetics.Herein,we atomically disperse Sb into open Cu-S frameworks with high cyclic stability and good conductivity.In-situ and ex-situ analyses reveal the multistep reversible reaction processes during the charging(formation of Cu_(3)SbS_(4))and discharging(precipitation of fracture-resistant Na_(3)Sb in the ionic-conductive Na_(x)Cu_(2)S_(2)/Na_(2)S matrix)processes.As a result,the thoughtfully engineered Cu_(3)SbS_(4)anode,without requiring additional carbon compositing,attains a high reversible specific capacity of 597 mAh g^(−1)at a 0.3 C rate.It also maintains approximately 95%capacity retention even at 15 C after 4300 cycles.The assembled Cu_(3)SbS_(4)||Na_(3)V_(2)(PO_(4))_(3)full cell achieves 10 C high rate performance and demonstrates excellent cycling stability of∼94.0%capacity retention after 200 cycles.Our approach to material design might offer a novel method for creating durable,high-capacity,and high-rate anode materials for sodium-ion batteries.
基金This research was kindly supported by the Research Fund for the Doctoral Program of Higher Education (RFDP) and the OpeningFou
文摘A novel open-framework vanadium(W) phosphate(H_3NCH_2CH_2NH_3)_3[(VO)_4(PP_4)_2(HPO_4)_4] (short for V_2P_3-en) has been prepared. It issynthesized hydrothermally in the presence of ethylenediamine (en) at 170 deg C for 5 days byself-assembly from structurally simple precursors V_2O_5, H_3PO_4 and H_2O. The compound ischaracterized by means of Fourier transform-infrared spectroscopy (FT-IR),Thermogravimetry-differential thermal analysis (TG-DTA), X-ray powder diffraction analysis (XRD) andScanning electron microscopy (SEM). Furthermore, the composition-structure-thermal stabilityrelation of V_2P_3-en is explored in terms of crystal chemistry, and the potential approach to theenhancement of its thermal stability is proposed.
基金We gratefully acknowledge the Guangxi Natural Science Foundation(No.2018GXNSFAA138199)Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guangxi Key Laboratory of New Energy and Building Energy Saving(19-J-21-17)Guangxi Key Laboratory of Optoelectronic Materials and Devices(20KF-2).
文摘Currently,δ-Mn0_(2)is one of the popularly studied cathode materials for aqueous zinc-ion batteries(ZIBs)but impeded by the sluggish kinetics of Zn^(2+)and the Mn cathode dissolution.Here,we report our discovery in the study of crystalline/amorphous Mn0_(2)(disordered Mn0_(2)),prepared by a simple redox reaction in the order/disorder engineering.This disordered Mn0_(2)cathode material,having open framework with more active sites and more stable structure,shows improved electrochemical performance in 2 mol L^(-1)ZnSO_(4)/0.1 mol L^(-1)MnS0_(4)aqueous electrolyte.It delivers an ultrahigh discharge specific capacity of 636 mA·h·g^(-1)at 0.1 A·g^(-1)and remains a large discharge capacity of 216 mA·h·g^(-1)even at a high current density of 1 A·g^(-1)after 400 cycles.Hence disordered Mn0_(2)could be a promising cathode material for aqueous ZIBs.The storage mechanism of the disordered Mn0_(2)electrode is also systematically investigated by structural and morphological examinations of ex situ,ultimately proving that the mechanism is the same as that of the δ-Mn0_(2)electrode.This work may pave the way for the possibility of using the order/disorder engineering to introduce novel properties in electrode materials for high-performance aqueous ZIBs.
文摘Subject Code:E02With the support by the National Natural Science Foundation of China,a study by the research group led by Prof.Li Chilin(李驰麟)from Shanghai Institute of Ceramics,Chinese Academy of Sciences reported that a cubic perovskite fluoride can serve as open framework cathode for high-rate
文摘OPEN Process Framework(OPF)是使软件开发过程达到CMM5级标准的软件工程框架。文中讨论了基于OPF的软件过程的主要元素及实施过程,并把该过程应用于某油田数据采集系统的开发,实践证明基于OPF的软件过程可以提高团队的开发能力、降低风险、有效控制资源,为项目的开发提供了高度清晰的过程框架,规范管理和开发流程。
基金We thank the national Natural Science Foundation(No.20173017)of ChinaState Key Basic Program(No.G2000048)for financial support.
文摘An open-framework ammonium ferricborophosphate compound was synthesized by mild hydrothermal condition at 110C. The crystal structure has been determined by single-crystal X-ray diffraction analysis: hexagonal, P6522, a = 9.452(2) , c = 15.698(5) , a = 90, g = 120, Z = 6, Mr = 310.58, V = 1214.0(5) 3, Dc = 2.549 g/cm3, m = 2.311mm-1, F(000) = 930. The chiral tetrahedral-tetrahedral helical ribbons are linked by the mixed valance FeII/FeIIIO6 coordinated octahedra. The ammonium ions are located inside the free loop of helical ribbons close to the inner wall of the helical channels1{[BP2O8]3-}, effecting on balancing charge and stabilizing helical ribbons.
基金The project was supported by the National Natural Science Foundation of China (20171012) and the Natural Science Foundation of Fujian Province, China (E0110010).
文摘A novel 3-D inorganic bimetallic compound Ag2Mo2O7 has been hydrothermally synthesized and structurally characterized by X-ray diffraction. The compound crystallizes in monoclinic, space group P21/c with a = 6.1274（3）, b = 13.1836（6）, c = 7.8780（3）A, β= 110.673（3）°, V = 595.42（5）A3, Z= 4, Mr= 519.62, Dc = 5.797g/cm^3, F（000） = 936,μ（MoKα） = 10.579 mm^-1, F（000） = 936, the final R = 0.0204 and wR = 0.0477 for 1268 observed reflections with I〉 2σ（I）. In the title compound, the [Mo4O16]n^8n-chains are linked through O-Ag-O bridging bonds to form a 3D network. It represents an unprecedented linking mode between the isopolyoxomolybdate chain and the transition metal oxide cluster. IR, TGA and fluorescence properties of the title compound are also studied.
文摘随着数字经济的快速发展,对三维重建技术的需求显著增加。然而,现有商用三维重建系统多依赖于封闭的单机或集群架构,导致灵活性和效率受限,而开源框架在绝对坐标和尺度恢复方面存在不足。对此,提出了一种基于GCP(Ground Control Point)辅助的Colmap框架中的SFM(Structure from Motion)算法。该算法通过构建残差方程、应用相似变换和全局光束法平差,将Colmap中SFM的自由网结果精确转换为绝对坐标。实验结果表明,该方法在计算精度上与商用系统Agisoft和大疆智图相当,且在尺度恢复上保持了较高的计算效率。所提方法不仅提升了开源三维重建系统的绝对尺度恢复能力,还为未来云端应用和大规模数据处理提供了理论和实践基础。未来将致力于实现全流程自动化三维重建的云架构,并探讨与物联网设备在三维监管中的应用前景。
