在锂离子电池(LIBs)和钠离子电池(SIBs)中,设计同时适用的负极材料,使其具有高倍率性能和超长循环寿命是亟需解决的工作。本文采用静电纺丝技术和硫化工程技术成功制备了一种均匀分布在N,S-掺杂炭纳米纤维上的MoO_(2)/MoS_(2)异质结构(M...在锂离子电池(LIBs)和钠离子电池(SIBs)中,设计同时适用的负极材料,使其具有高倍率性能和超长循环寿命是亟需解决的工作。本文采用静电纺丝技术和硫化工程技术成功制备了一种均匀分布在N,S-掺杂炭纳米纤维上的MoO_(2)/MoS_(2)异质结构(MoO_(2)/MoS_(2)@NSC)。其中一维炭骨架作为导电框架可缩短Li^(+)/Na^(+)的扩散途径;炭纳米纤维中N/S杂原子的掺杂引入了丰富的活性位点,显著增强了离子扩散动力学。此外,在MoO_(2)相中通过原位形成的MoS_(2)纳米片强化了异质界面,MoO_(2)和MoS_(2)之间异质界面的构建使得Li^(+)/Na^(+)的快速传输成为实现高效储能的关键。因此,作为LIBs负极材料时,MoO_(2)/MoS_(2)@NSC电极在5.0 A g^(−1)的电流密度下循环2000圈后,仍具有640 mAh g^(−1)的优异放电比容量,每圈的容量衰减率仅为0.002%;在10.0 A g^(−1)的高电流密度下可达到614 mAh g^(−1)的放电比容量。对于SIBs,在2.0 A g^(−1)的电流密度下循环2000圈后其可逆容量仍能达到242 mAh g^(−1)。本工作采用一种新颖的界面调控策略来合理地设计负极材料,从而提高Li^(+)/Na^(+)储存动力学,实现超长寿命的循环性能。展开更多
A new metal-organic coordination polymer [Zn（ipt）（im）2]2n·3nH2O 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-...A new metal-organic coordination polymer [Zn（ipt）（im）2]2n·3nH2O 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group P2（1/n） with a = 10.653（3）, b = 17.891（6）, c = 10.743（4）A^°,β= 117.093（5）°, V= 1822.9（10） A^°3, Mr= 413.65, Dc = 1.507 g/cm^3,/t（MoKa） = 1.390 mm^-1, F（000） = 840, Z = 4, the final R = 0.0444 and wR = 0.1066 for 2434 observed reflections （I〉 2σ（I））. Furthermore, compound 1 shows blue photoluminescent property at room temperature.展开更多
A new one-dimensional copper coordination polymer chain has been prepared and fully characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound { [Cu2（C2O4）2（inta）4]（i...A new one-dimensional copper coordination polymer chain has been prepared and fully characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound { [Cu2（C2O4）2（inta）4]（inta）}n 1 crystallizes in the triclinic system, space group P1, with a = 8.4722（5）, b = 10.9825（6）, c = 11.6128（6）A, α= 104.8050（10）,β = 102.5740（10）, γ= 109.6890（10）°, V= 927.18（9） A3, Mr = 929.79, Z = 1, Dc = 1.665 g/cm^3, F（000） = 475, μ = 1.231 mm^-1, R = 0.0453 and wR = 0.1185 for 3290 observed reflections （Ⅰ 〉 2σ（Ⅰ））. Of the compound, the Cu center is octahedrally coordinated with oxalate acting as a tetra-dentate ligand coordinated to the copper atom and each inta serving as a terminal ligand by employing only one N-donor to coordinate with the Cu center. An infinite {Cu2（C2O4）2}∞ chain is formed along the c axis. Furthermore, the 1D chains are held together via extensive hydrogen-bonding interactions to generate a three-dimensional network with 1D channels （ca. 5.491A×11.507A） where inta molecules are filled.展开更多
The structure of a binuclear cadmium（Ⅱ） quaternary complex, [Cd2（phen）2- Q2（BP）]n 1 （phen = 1,10-phenanthroline, BP = biphenyl-4,4′-dicarboxylic acid, Q = 8-hydroxy- quinoline-anion）, has been determined by ...The structure of a binuclear cadmium（Ⅱ） quaternary complex, [Cd2（phen）2- Q2（BP）]n 1 （phen = 1,10-phenanthroline, BP = biphenyl-4,4′-dicarboxylic acid, Q = 8-hydroxy- quinoline-anion）, has been determined by X-ray crystallography and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. It crystallizes in the monoclinic system, space group P21/n with a = 13.1906（18）, b = 10.9623（15）, c = 16.947（2）A, β = 111.3430（10）°, V = 2282.5（5）A^3, Z = 4, Mr = 556.85, Dc = 1.620 g/cm^3, F（000） = 1116,μ= 0.994 mm^-1 and S = 1.056. In the structure, 1D chains are connected via biphenyl-4,4′-dicarboxylic acid, 8-hydroxy quinoline anion and binuclear cadmium atoms into an infinite 1-D molecular chain architecture. Via aryl ring π-π stacking interactions a supramolecular structure is formed in 1.展开更多
A novel metal-organic coordination polymer [Cd2（dpphen）2（BDC）0.5Cl3]n （dpphen = 4,7-diphenyl-1,10-phenanthroline, BDC = terephthalate） 1 has been obtained by using hydrothermal synthesis and characterized by ele...A novel metal-organic coordination polymer [Cd2（dpphen）2（BDC）0.5Cl3]n （dpphen = 4,7-diphenyl-1,10-phenanthroline, BDC = terephthalate） 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, fluorescence spectrum and single-crystal X-ray diffraction. The complex crystallizes in triclinic, space group P1^- with a = 9.981（5）, b = 10.436（5）, c = 21.104（10）A,α= 94.640（7）, β = 103.160（7）, γ = 92.958（8）°, V = 2127.8（17）A^3, C52H34Cd2Cl3N4O2, Mr = 1077.98, Dc = 1.682 g/cm^3, μ（MoKα） = 1.237 mm^-1, F（000） = 1074, Z = 2, the final R = 0.0314 and wR = 0.0757 for 7358 observed reflections （Ⅰ 〉 2σ（Ⅰ））. Furthermore, compound 1 shows blue photoluminescent property at room temperature.展开更多
A new metal-organic complex Mn2（cbba）4（phen）2 （Hcbba = 2-（4＇-chlorine-benzoyl）- benzoic acid, phen = 1,10-phenanthroline） 1 has been hydrotherrnally synthesized and structurally characterized by single-crysta...A new metal-organic complex Mn2（cbba）4（phen）2 （Hcbba = 2-（4＇-chlorine-benzoyl）- benzoic acid, phen = 1,10-phenanthroline） 1 has been hydrotherrnally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound crystallizes in orthorhombic, space group Pbcn with α = 12.154（5）, b = 18.166（7）, c = 31.197（13） A, V = 6887（5） A^3, C80H48Cl4Mn2N4O12, Mr= 1508.90, Dc = 1.455 g/cm^3, μ（MoKα） = 0.591 mm^-1, F（000） = 3080, Z = 4, the final R = 0.0408 and wR = 0.0873 for 4033 observed reflections （I 〉 2σ（I））. In the crystal structure, the manganese atom is six-coordinated with four carboxylate oxygen atoms from three different cbba ligands and two nitrogen atoms from phen ligands, showing a distorted octahedral geometry. Furthermore, it exhibits a 3D supramolecular network through π-π interactions.展开更多
The structure of a manganese（Ⅱ） polymer,[Mn（TP）（TBZH）]2n 1（TBZH=thiabendazole,TP=terephthalic acid）,has been determined by X-ray crystallography and characterized by elemental analysis,IR spectrum and thermog...The structure of a manganese（Ⅱ） polymer,[Mn（TP）（TBZH）]2n 1（TBZH=thiabendazole,TP=terephthalic acid）,has been determined by X-ray crystallography and characterized by elemental analysis,IR spectrum and thermogravimetric analysis.It crystallizes in the orthorhombic system,space group Pbcn with a=12.7813（12）,b=10.7544（10）,c=20.1270（19）A,V=2766.6（4）A^3,Z=8,C14H9Mn0.50N3O2S,Mr=310.77,Dc=1.492g/cm^3,F（000）=1268,μ=0.674 mm^-1 and S=1.064.The 1-D chain architecture of 1 is constructed from terephthalic acid and manganese atoms.Hydrogen bonds and aryl ring π-π stacking interactions in 1 contribute to form a 3-D supramo-lecular structure.展开更多
A novel metal-organic coordination polymer [Mn3（2,2′-dipha）3（phen）6]n·3nH2O （2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline） 1 has been hydrothermally synthesized and structurally characteri...A novel metal-organic coordination polymer [Mn3（2,2′-dipha）3（phen）6]n·3nH2O （2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline） 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and magnetic susceptibility measurements. The crystal crystallizes in triclinic, space group P1 with a = 16.921（5）, b = 18.307（5）, c = 18.450（5）A , α = 113.369（5）, β = 108.529（5）, γ = 102.984（5）°, V = 4553（2）A^ 3, C114H72Mn3N12O14.25, Mr = 2002.66, Dc = 1.461 g/cm^3, μ（MoKα） = 0.488 mm^-1, the final F（000） = 2058, Z = 2, R = 0.0491 and wR = 0.0980 for 9087 observed reflections （I 〉 2σ（I））. In the crystal structure, the manganese atom is six-coordinated with two carboxylate oxygen atoms from different carboxylate groups of the same dipha and four nitrogen atoms from two different phen ligands, showing a slightly distorted octahedral geometry. Fur- thermore, it exhibits a zero-dimensional structure with dipha-Mn-phen- as building units. Variable- temperature magnetic measure shows an overall anti-ferromagnetic behavior for compound 1.展开更多
文摘在锂离子电池(LIBs)和钠离子电池(SIBs)中,设计同时适用的负极材料,使其具有高倍率性能和超长循环寿命是亟需解决的工作。本文采用静电纺丝技术和硫化工程技术成功制备了一种均匀分布在N,S-掺杂炭纳米纤维上的MoO_(2)/MoS_(2)异质结构(MoO_(2)/MoS_(2)@NSC)。其中一维炭骨架作为导电框架可缩短Li^(+)/Na^(+)的扩散途径;炭纳米纤维中N/S杂原子的掺杂引入了丰富的活性位点,显著增强了离子扩散动力学。此外,在MoO_(2)相中通过原位形成的MoS_(2)纳米片强化了异质界面,MoO_(2)和MoS_(2)之间异质界面的构建使得Li^(+)/Na^(+)的快速传输成为实现高效储能的关键。因此,作为LIBs负极材料时,MoO_(2)/MoS_(2)@NSC电极在5.0 A g^(−1)的电流密度下循环2000圈后,仍具有640 mAh g^(−1)的优异放电比容量,每圈的容量衰减率仅为0.002%;在10.0 A g^(−1)的高电流密度下可达到614 mAh g^(−1)的放电比容量。对于SIBs,在2.0 A g^(−1)的电流密度下循环2000圈后其可逆容量仍能达到242 mAh g^(−1)。本工作采用一种新颖的界面调控策略来合理地设计负极材料,从而提高Li^(+)/Na^(+)储存动力学,实现超长寿命的循环性能。
基金The project was supported by the Education Office of Jilin Province (No. 0047)
文摘A new metal-organic coordination polymer [Zn（ipt）（im）2]2n·3nH2O 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group P2（1/n） with a = 10.653（3）, b = 17.891（6）, c = 10.743（4）A^°,β= 117.093（5）°, V= 1822.9（10） A^°3, Mr= 413.65, Dc = 1.507 g/cm^3,/t（MoKa） = 1.390 mm^-1, F（000） = 840, Z = 4, the final R = 0.0444 and wR = 0.1066 for 2434 observed reflections （I〉 2σ（I））. Furthermore, compound 1 shows blue photoluminescent property at room temperature.
基金the Education Office of Jilin Province (No. 0047)
文摘A new one-dimensional copper coordination polymer chain has been prepared and fully characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound { [Cu2（C2O4）2（inta）4]（inta）}n 1 crystallizes in the triclinic system, space group P1, with a = 8.4722（5）, b = 10.9825（6）, c = 11.6128（6）A, α= 104.8050（10）,β = 102.5740（10）, γ= 109.6890（10）°, V= 927.18（9） A3, Mr = 929.79, Z = 1, Dc = 1.665 g/cm^3, F（000） = 475, μ = 1.231 mm^-1, R = 0.0453 and wR = 0.1185 for 3290 observed reflections （Ⅰ 〉 2σ（Ⅰ））. Of the compound, the Cu center is octahedrally coordinated with oxalate acting as a tetra-dentate ligand coordinated to the copper atom and each inta serving as a terminal ligand by employing only one N-donor to coordinate with the Cu center. An infinite {Cu2（C2O4）2}∞ chain is formed along the c axis. Furthermore, the 1D chains are held together via extensive hydrogen-bonding interactions to generate a three-dimensional network with 1D channels （ca. 5.491A×11.507A） where inta molecules are filled.
基金Siping Sci-tech Development Planning Project(No.2005012)
文摘The structure of a binuclear cadmium（Ⅱ） quaternary complex, [Cd2（phen）2- Q2（BP）]n 1 （phen = 1,10-phenanthroline, BP = biphenyl-4,4′-dicarboxylic acid, Q = 8-hydroxy- quinoline-anion）, has been determined by X-ray crystallography and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. It crystallizes in the monoclinic system, space group P21/n with a = 13.1906（18）, b = 10.9623（15）, c = 16.947（2）A, β = 111.3430（10）°, V = 2282.5（5）A^3, Z = 4, Mr = 556.85, Dc = 1.620 g/cm^3, F（000） = 1116,μ= 0.994 mm^-1 and S = 1.056. In the structure, 1D chains are connected via biphenyl-4,4′-dicarboxylic acid, 8-hydroxy quinoline anion and binuclear cadmium atoms into an infinite 1-D molecular chain architecture. Via aryl ring π-π stacking interactions a supramolecular structure is formed in 1.
基金The project was supported by the Education Office of Jilin Province (No. 0047)
文摘A novel metal-organic coordination polymer [Cd2（dpphen）2（BDC）0.5Cl3]n （dpphen = 4,7-diphenyl-1,10-phenanthroline, BDC = terephthalate） 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, fluorescence spectrum and single-crystal X-ray diffraction. The complex crystallizes in triclinic, space group P1^- with a = 9.981（5）, b = 10.436（5）, c = 21.104（10）A,α= 94.640（7）, β = 103.160（7）, γ = 92.958（8）°, V = 2127.8（17）A^3, C52H34Cd2Cl3N4O2, Mr = 1077.98, Dc = 1.682 g/cm^3, μ（MoKα） = 1.237 mm^-1, F（000） = 1074, Z = 2, the final R = 0.0314 and wR = 0.0757 for 7358 observed reflections （Ⅰ 〉 2σ（Ⅰ））. Furthermore, compound 1 shows blue photoluminescent property at room temperature.
基金supported by the Science and Technology Research Projects of the Education Department of Jilin Province (No. 2007. 213)
文摘A new metal-organic complex Mn2（cbba）4（phen）2 （Hcbba = 2-（4＇-chlorine-benzoyl）- benzoic acid, phen = 1,10-phenanthroline） 1 has been hydrotherrnally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound crystallizes in orthorhombic, space group Pbcn with α = 12.154（5）, b = 18.166（7）, c = 31.197（13） A, V = 6887（5） A^3, C80H48Cl4Mn2N4O12, Mr= 1508.90, Dc = 1.455 g/cm^3, μ（MoKα） = 0.591 mm^-1, F（000） = 3080, Z = 4, the final R = 0.0408 and wR = 0.0873 for 4033 observed reflections （I 〉 2σ（I））. In the crystal structure, the manganese atom is six-coordinated with four carboxylate oxygen atoms from three different cbba ligands and two nitrogen atoms from phen ligands, showing a distorted octahedral geometry. Furthermore, it exhibits a 3D supramolecular network through π-π interactions.
基金supported by Siping Sci-tech Development Planning Project (No 2005012)
文摘The structure of a manganese（Ⅱ） polymer,[Mn（TP）（TBZH）]2n 1（TBZH=thiabendazole,TP=terephthalic acid）,has been determined by X-ray crystallography and characterized by elemental analysis,IR spectrum and thermogravimetric analysis.It crystallizes in the orthorhombic system,space group Pbcn with a=12.7813（12）,b=10.7544（10）,c=20.1270（19）A,V=2766.6（4）A^3,Z=8,C14H9Mn0.50N3O2S,Mr=310.77,Dc=1.492g/cm^3,F（000）=1268,μ=0.674 mm^-1 and S=1.064.The 1-D chain architecture of 1 is constructed from terephthalic acid and manganese atoms.Hydrogen bonds and aryl ring π-π stacking interactions in 1 contribute to form a 3-D supramo-lecular structure.
基金The project was supported by the Education Office of Jilin Province (No. 0047)
文摘A novel metal-organic coordination polymer [Mn3（2,2′-dipha）3（phen）6]n·3nH2O （2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline） 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and magnetic susceptibility measurements. The crystal crystallizes in triclinic, space group P1 with a = 16.921（5）, b = 18.307（5）, c = 18.450（5）A , α = 113.369（5）, β = 108.529（5）, γ = 102.984（5）°, V = 4553（2）A^ 3, C114H72Mn3N12O14.25, Mr = 2002.66, Dc = 1.461 g/cm^3, μ（MoKα） = 0.488 mm^-1, the final F（000） = 2058, Z = 2, R = 0.0491 and wR = 0.0980 for 9087 observed reflections （I 〉 2σ（I））. In the crystal structure, the manganese atom is six-coordinated with two carboxylate oxygen atoms from different carboxylate groups of the same dipha and four nitrogen atoms from two different phen ligands, showing a slightly distorted octahedral geometry. Fur- thermore, it exhibits a zero-dimensional structure with dipha-Mn-phen- as building units. Variable- temperature magnetic measure shows an overall anti-ferromagnetic behavior for compound 1.
