Vanadium oxide cathode materials with stable crystal structure and fast Zn^(2+) storage capabilities are extremely important to achieving outstanding electrochemical performance in aqueous zinc‐ion batteries.In this ...Vanadium oxide cathode materials with stable crystal structure and fast Zn^(2+) storage capabilities are extremely important to achieving outstanding electrochemical performance in aqueous zinc‐ion batteries.In this work,a one‐step hydrothermal method was used to manipulate the bimetallic ion intercalation into the interlayer of vanadium oxide.The pre‐intercalated Cu ions act as pillars to pin the vanadium oxide(V‐O)layers,establishing stabilized two‐dimensional channels for fast Zn^(2+) diffusion.The occupation of Mn ions between V‐O interlayer further expands the layer spacing and increases the concentration of oxygen defects(Od),which boosts the Zn^(2+) diffusion kinetics.As a result,as‐prepared Cu_(0.17)Mn_(0.03)V_(2)O_(5−□)·2.16H_(2)O cathode shows outstanding Zn‐storage capabilities under room‐and lowtemperature environments(e.g.,440.3 mAh g^(−1) at room temperature and 294.3 mAh g^(−1)at−60°C).Importantly,it shows a long cycling life and high capacity retention of 93.4%over 2500 cycles at 2 A g^(−1) at−60°C.Furthermore,the reversible intercalation chemistry mechanisms during discharging/charging processes were revealed via operando X‐ray powder diffraction and ex situ Raman characterizations.The strategy of a couple of 3d transition metal doping provides a solution for the development of superior room‐/lowtemperature vanadium‐based cathode materials.展开更多
A new zinc 1,3,5-benzenetricarboxylate Zn3（BTC）2（DMSO）4（BTC=1,3,5-benzenetricarboxylate） has been solvothermally synthesized in DMSO and structurally determined by X-ray single-crystal diffraction.It crystallize...A new zinc 1,3,5-benzenetricarboxylate Zn3（BTC）2（DMSO）4（BTC=1,3,5-benzenetricarboxylate） has been solvothermally synthesized in DMSO and structurally determined by X-ray single-crystal diffraction.It crystallizes in the monoclinic system,space group P21/c with a=10.0861（11）,b=10.2527（11）,c=16.4013（18）,β=95.478（2）°,V=1688.3（3）3,Z=2,Zn3S4C26H30O16,Mr=922.85,Dc=1.815 g/cm3,F（000）=936,μ=2.434 mm-1,R=0.0319 and wR=0.0755.This compound consists of trimeric zinc clusters and BTC linkers.Alternate connection of these trimeric zinc clusters and BTC linkers results in a three-dimensional（3,6）-connected frame-work with rutile topology.展开更多
Structural properties of the organic-inorganic hybrid(C_(2)H_(5)NH_(3))_(2)CuCl_(4) have been investigated by means of x-ray powder diffraction and Rietveld analysis. A structural phase transition from Pbca to Aba2 oc...Structural properties of the organic-inorganic hybrid(C_(2)H_(5)NH_(3))_(2)CuCl_(4) have been investigated by means of x-ray powder diffraction and Rietveld analysis. A structural phase transition from Pbca to Aba2 occurs at T_(4)= 240 K, which results in a paraelectric–ferroelectric phase transition. The release of the Jahn–Teller distortion with increasing temperature toward T_(4) is revealed by the structural analysis.展开更多
Two new alkaline earth metal coordination polymers constructed from the deriva-tive of 1,2,4-triazole are presented herein,namely,{[Sr（AmTAZAc）2（H2O）]}（1） and {[Ba（AmTAZAc）2（H2O）]}（2）（AmTAZAc = 3-amino-1H...Two new alkaline earth metal coordination polymers constructed from the deriva-tive of 1,2,4-triazole are presented herein,namely,{[Sr（AmTAZAc）2（H2O）]}（1） and {[Ba（AmTAZAc）2（H2O）]}（2）（AmTAZAc = 3-amino-1H-1,2,4-triazole-5-carboxylate）,which have been synthesized by using the layering method and structurally characterized by elemental analysis,IR,and single-crystal X-ray diffraction.Complexes 1 and 2 are isostructural,and both crystallize in the orthorhombic system,space group Fdd2.X-ray structural analysis shows that 1 or 2 has an intriguing 3-D infinite network of（318.438.510） topology based on a 2-D sheet structure of（4,4） net.The result shows that noncovalent interactions play an important role in strengthening the whole structures of the compounds.展开更多
A new cadmium（Ⅱ） coordination polymer,[Cd（Hcna）2]n（1）,was hydrothermally synthesized based on 5-（4-carboxyphenoxy）nicotinic acid（H2cna） organic linker.X-ray singlecrystal diffraction determination reveals t...A new cadmium（Ⅱ） coordination polymer,[Cd（Hcna）2]n（1）,was hydrothermally synthesized based on 5-（4-carboxyphenoxy）nicotinic acid（H2cna） organic linker.X-ray singlecrystal diffraction determination reveals that 1 crystallizes in the monoclinic P21/c space group,with a = 10.101（2）,b = 7.9139（17）,c= 15.627（3） A,β= 103.364（3）°,V= 1215.4（4） A^3,Z=2,Mr= 628.81,Dc = 1.718 Mg/m^3,μ= 0.963 mm^（-1）,F（000） = 628,the final R = 0.0177 and wR = 0.0432 for 2263 observed reflections with I 〉2σ（I）.In 1,the Cd（Ⅱ） cations are connected by nicotiniate units to form a two-dimensional（2D） layer,and it is further linked through benzoate units to form a three-dimensional（3D） structure.Topologically,the structure of 1 represents a 3,6-connected 3D rtl topology.Furthermore,thermal stability and photoluminescent property of 1 have also been investigated.展开更多
The crystal and molecular structures of the Na[Gd Ⅲ(edta)(H_2O)_3]·5H_2O (edta=ethylenediaminetetraacetic acid) and Na_4[Gd Ⅲ(dtpa)(H_2O)]_2·14H_2O (dtpa=diethylenetriaminepentaacetic acid) complexes were ...The crystal and molecular structures of the Na[Gd Ⅲ(edta)(H_2O)_3]·5H_2O (edta=ethylenediaminetetraacetic acid) and Na_4[Gd Ⅲ(dtpa)(H_2O)]_2·14H_2O (dtpa=diethylenetriaminepentaacetic acid) complexes were determined by single-crystal X-ray structure analyses. The crystal of the Na[Gd Ⅲ(edta)(H_2O)_3]·5H_2O belongs to orthorhombic crystal system and Fdd2 space group. The crystal data are as follows: a =1.9424(7)nm,b =3.5496(12)nm,c =1.2125(4)nm,V =8.360(5)nm 3,Z =16,M =612.63,D _c=1.947 g·cm (-3),μ =3.274 mm (-1) and F (000)=4880. The final R and wR values are 0.0295 and 0.0677 for 3102 [ I>2.0σ(I) ] unique reflections,and 0.0328 and 0.0695 for all 8269 reflections,respectively. The [Gd Ⅲ(edta)(H_2O)_3]-complex anion has a nine-coordinate pseudo-monocapped square antiprismatic structure in which the nine coordinate atoms,two N and seven O are from one edta ligand and three coordinate water molecules. The crystal of the Na_4[Gd Ⅲ(dtpa)(H_2O)]_2·14H_2O belongs to monoclinic crystal system and P2(1)/n space group. The crystal data are as follows: a =1.4894(6)nm,b =1.7987(7)nm, c =1.9600(7)nm,β =99.496(7),V =5.179(3)nm3,Z=4,M =1471.44,D _c=1.841 g·cm (-3),μ =2.676 mm (-1) and F (000)=2872. The final R and wR are 0.0435 and 0.0979 for 8929 [ I>2.0σ(I) ] unique reflections,and 0.0820 and 0.1167 for all 20717 reflections,respectively. The total complex moleculue is composed of two close parts in structure. The [Gd Ⅲ(dtpa)(H_2O)] (2-) complex anion in the every part has a nine-coordinate structure with distorted monocapped square antiprismatic prism,in which the dtpa coordinates with central Gd Ⅲ ion acting as a octadentate ligand with three N atoms and five O atoms,and one water as the ninth ligand directly coordinates with central Gd Ⅲ ion.展开更多
基金National Natural Science Foundation of China,Grant/Award Numbers:52372188,51902090,51922008,520721142023 Introduction of studying abroad talent program,the China Postdoctoral Science Foundation,Grant/Award Number:2019 M652546+3 种基金Xinxiang Major Science and Technology Projects,Grant/Award Number:21ZD001Henan Province Postdoctoral Start‐Up Foundation,Grant/Award Number:1901017Henan Center for Outstanding Overseas Scientists,Grant/Award Number:GZS2018003Overseas Expertise Introduction Project for Discipline Innovation,Grant/Award Number:D17007。
文摘Vanadium oxide cathode materials with stable crystal structure and fast Zn^(2+) storage capabilities are extremely important to achieving outstanding electrochemical performance in aqueous zinc‐ion batteries.In this work,a one‐step hydrothermal method was used to manipulate the bimetallic ion intercalation into the interlayer of vanadium oxide.The pre‐intercalated Cu ions act as pillars to pin the vanadium oxide(V‐O)layers,establishing stabilized two‐dimensional channels for fast Zn^(2+) diffusion.The occupation of Mn ions between V‐O interlayer further expands the layer spacing and increases the concentration of oxygen defects(Od),which boosts the Zn^(2+) diffusion kinetics.As a result,as‐prepared Cu_(0.17)Mn_(0.03)V_(2)O_(5−□)·2.16H_(2)O cathode shows outstanding Zn‐storage capabilities under room‐and lowtemperature environments(e.g.,440.3 mAh g^(−1) at room temperature and 294.3 mAh g^(−1)at−60°C).Importantly,it shows a long cycling life and high capacity retention of 93.4%over 2500 cycles at 2 A g^(−1) at−60°C.Furthermore,the reversible intercalation chemistry mechanisms during discharging/charging processes were revealed via operando X‐ray powder diffraction and ex situ Raman characterizations.The strategy of a couple of 3d transition metal doping provides a solution for the development of superior room‐/lowtemperature vanadium‐based cathode materials.
基金supported by the National Natural Science Foundation of China (No 20871027)the Program for New Century Excellent Talents in University (NCET-07-0169)
文摘A new zinc 1,3,5-benzenetricarboxylate Zn3（BTC）2（DMSO）4（BTC=1,3,5-benzenetricarboxylate） has been solvothermally synthesized in DMSO and structurally determined by X-ray single-crystal diffraction.It crystallizes in the monoclinic system,space group P21/c with a=10.0861（11）,b=10.2527（11）,c=16.4013（18）,β=95.478（2）°,V=1688.3（3）3,Z=2,Zn3S4C26H30O16,Mr=922.85,Dc=1.815 g/cm3,F（000）=936,μ=2.434 mm-1,R=0.0319 and wR=0.0755.This compound consists of trimeric zinc clusters and BTC linkers.Alternate connection of these trimeric zinc clusters and BTC linkers results in a three-dimensional（3,6）-connected frame-work with rutile topology.
基金supported by the National Natural Science Foundation of China (Grant No. 51925605)Fujian Institute of Innovation,Chinese Academy of Sciences(Grant No. FJCXY18040303)the Youth Innovation Promotion of the Chinese Academy of Sciences (Grant No. 2013004)。
文摘Structural properties of the organic-inorganic hybrid(C_(2)H_(5)NH_(3))_(2)CuCl_(4) have been investigated by means of x-ray powder diffraction and Rietveld analysis. A structural phase transition from Pbca to Aba2 occurs at T_(4)= 240 K, which results in a paraelectric–ferroelectric phase transition. The release of the Jahn–Teller distortion with increasing temperature toward T_(4) is revealed by the structural analysis.
基金Supported by the National Natural Science Foundation of China (Nos. 20771006 and 20901004)
文摘Two new alkaline earth metal coordination polymers constructed from the deriva-tive of 1,2,4-triazole are presented herein,namely,{[Sr（AmTAZAc）2（H2O）]}（1） and {[Ba（AmTAZAc）2（H2O）]}（2）（AmTAZAc = 3-amino-1H-1,2,4-triazole-5-carboxylate）,which have been synthesized by using the layering method and structurally characterized by elemental analysis,IR,and single-crystal X-ray diffraction.Complexes 1 and 2 are isostructural,and both crystallize in the orthorhombic system,space group Fdd2.X-ray structural analysis shows that 1 or 2 has an intriguing 3-D infinite network of（318.438.510） topology based on a 2-D sheet structure of（4,4） net.The result shows that noncovalent interactions play an important role in strengthening the whole structures of the compounds.
基金supported by the Natural Science Foundation of China(21401097)for the financial support
文摘A new cadmium（Ⅱ） coordination polymer,[Cd（Hcna）2]n（1）,was hydrothermally synthesized based on 5-（4-carboxyphenoxy）nicotinic acid（H2cna） organic linker.X-ray singlecrystal diffraction determination reveals that 1 crystallizes in the monoclinic P21/c space group,with a = 10.101（2）,b = 7.9139（17）,c= 15.627（3） A,β= 103.364（3）°,V= 1215.4（4） A^3,Z=2,Mr= 628.81,Dc = 1.718 Mg/m^3,μ= 0.963 mm^（-1）,F（000） = 628,the final R = 0.0177 and wR = 0.0432 for 2263 observed reflections with I 〉2σ（I）.In 1,the Cd（Ⅱ） cations are connected by nicotiniate units to form a two-dimensional（2D） layer,and it is further linked through benzoate units to form a three-dimensional（3D） structure.Topologically,the structure of 1 represents a 3,6-connected 3D rtl topology.Furthermore,thermal stability and photoluminescent property of 1 have also been investigated.
文摘The crystal and molecular structures of the Na[Gd Ⅲ(edta)(H_2O)_3]·5H_2O (edta=ethylenediaminetetraacetic acid) and Na_4[Gd Ⅲ(dtpa)(H_2O)]_2·14H_2O (dtpa=diethylenetriaminepentaacetic acid) complexes were determined by single-crystal X-ray structure analyses. The crystal of the Na[Gd Ⅲ(edta)(H_2O)_3]·5H_2O belongs to orthorhombic crystal system and Fdd2 space group. The crystal data are as follows: a =1.9424(7)nm,b =3.5496(12)nm,c =1.2125(4)nm,V =8.360(5)nm 3,Z =16,M =612.63,D _c=1.947 g·cm (-3),μ =3.274 mm (-1) and F (000)=4880. The final R and wR values are 0.0295 and 0.0677 for 3102 [ I>2.0σ(I) ] unique reflections,and 0.0328 and 0.0695 for all 8269 reflections,respectively. The [Gd Ⅲ(edta)(H_2O)_3]-complex anion has a nine-coordinate pseudo-monocapped square antiprismatic structure in which the nine coordinate atoms,two N and seven O are from one edta ligand and three coordinate water molecules. The crystal of the Na_4[Gd Ⅲ(dtpa)(H_2O)]_2·14H_2O belongs to monoclinic crystal system and P2(1)/n space group. The crystal data are as follows: a =1.4894(6)nm,b =1.7987(7)nm, c =1.9600(7)nm,β =99.496(7),V =5.179(3)nm3,Z=4,M =1471.44,D _c=1.841 g·cm (-3),μ =2.676 mm (-1) and F (000)=2872. The final R and wR are 0.0435 and 0.0979 for 8929 [ I>2.0σ(I) ] unique reflections,and 0.0820 and 0.1167 for all 20717 reflections,respectively. The total complex moleculue is composed of two close parts in structure. The [Gd Ⅲ(dtpa)(H_2O)] (2-) complex anion in the every part has a nine-coordinate structure with distorted monocapped square antiprismatic prism,in which the dtpa coordinates with central Gd Ⅲ ion acting as a octadentate ligand with three N atoms and five O atoms,and one water as the ninth ligand directly coordinates with central Gd Ⅲ ion.
