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Wuhan University Journal of Natural Sciences 2003年第3A期8卷 853-856页

作者： Wang Jin\|long, Yuan Liang\|jie, Yang Yi\|yong, Sun Ju\|tang , Zhang Ke\|li College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China

The single crystal nickel salicylate tetrahydrate was prepared with the rheological phase reaction method from nickelous hydroxide and salicylic acid. The crystal structure was determined. It is monoclinic, space group P2 1/n, a= 0.678 74 (3), b=0.515 91(2), c =2.313 30(9) nm, β= 90.928 6(17)° , V =0.809 94(6) nm 3, Z=2, ρ calcd = 1.661 g\5cm -3 . Final R indices: R =0.027 9 and wR= 0.065 0 \[I >2σ(I)\]. The thermal decomposition mechanism in an inert atmosphere was investigated via TG, DTG and DTA. The thermal decomposition products were characterized with IR and micro\|powder X\|ray diffraction method. A new coordination polymer (NiC 6 H 4 O) n as an intermediate product and nanoscale metal nickel were obtained in the ranges of 364\|429 ℃ and 429\|680 ℃, respectively.

关键词： nickelous salitylate tetrahydrate rheological phase reaction crystal structure thermal decomposition

Synthesis and Characterization of a Novel Compound SnDy2O4

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Chinese Chemical Letters 2002年第6期13卷 587-588页

作者： Yong ZHANG Ke Li ZHANG Man Ke JIA Hao TANG Ju Tang SUN Liang Jie YUAN College of Chemistry and Molecular science Department of ChemistryWuhan UniversityWuhan 430072

A new phase, the rare earth complex oxide SnDy2O4 was synthesized by the thermal decomposition of its oxalate precursor that was prepared by rheological phase reaction method. TG, IR, XRD and EPS were used to prove the formation of the compound SnDy2O4. The structure of SnDy2O4 was refined by Rietveld analysis. SnDy2O4 is cubic, a = 7.40366 ? V = 405.82 ?, Z = 4.

关键词： Rare earth complex oxide SnDy2O4 rheological phase reaction thermal analysis.

Studies of Nano-sized Co_3O_4 as Anode Materials for Lithium-ion Batteries

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Chinese Journal of Chemistry 2003年第10期21卷 1275-1279页

作者：黄峰詹晖周运鸿 College of Chemistry and Molecular Science

The structural evolution of the Co 3O 4 fine powders prepared by rheological phase reaction and pyrolysis method upon different temperature has been investigated using X ray diffraction (XRD) topography. The electrochemical performance of Co 3O 4 electrode materials for Li ion batteries is studied in the form of Li/Co 3O 4 cells. The reversible capacity as high as 930 mAh/g for the Co 3O 4 sample heat treated at 600 ℃ is achieved and sustained over 30 times charge discharge cycles at room temperature. The detailed information concerning the reaction mechanism of Co 3O 4 active material together with lithium ion is obtained through ex situ XRD topography, X ray photoelectron spectroscopy (XPS) analysis and cyclic voltammetry (CV) technique. And it is revealed that a “two step” reaction is involved in the charge and discharge of the Li/Co 3O 4 cells, in which Co 3O 4 active material is reversibly reduced into x Co· (3- x )CoO and then into metallic Co.

关键词： cobalt oxide anode material lithium ion battery rheological phase reaction

Synthesis,Characterization and Properties of LiFePO_4/C Cathode Material

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Wuhan University Journal of Natural Sciences 2005年第5期10卷 909-912页

作者： ZHOU Xin-wen ZHAN Dan WANG Li-na LIU Qiao-yun ZONG Hong-xing ZHANG Ke-li College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China Center of Nanoscience and Nanotechnology Research Wuhan University Wuhan 430072 Hubei China

Lithium iron phosphate coated with carbon （LiFePO4/C） was synthesized by improved solid-state reaction using comparatively lower temperature and fewer sintering time. The carbon came from citric acid, which acted as a new carbon source. It was characterized by thermogravimetry and differential thermal analysis （TG/DTA）, X ray diffractometer （XRD）, Element Analysis （EA） and Scanning electron microscope （SEM）. We also studied the electrochemical properties of the material. The first discharge capacity of the LiFePO4/C is 121 mAh·g^-1 at 10 mA·g^-1 at room temperature. When the current density increased to 100 mA·g^-1, the first discharge capacity decreased to 110 mAh·g^-1 and retained 95% of the initial capacity after 100 cycles. The LiFePO4/C obtained shows a good electrochemical capacity and cycle ability at a large current density.

关键词： lithium ion battery cathode material lithium iron phosphate rheological phase reaction

rheological phase Synthesis and Characterization of Copper Monosalicylate

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Wuhan University Journal of Natural Sciences 2003年第2A期8卷 425-427页

作者： Yang Yi-yong, Li Liang-chao, Yuan Liang-jie, Sun Ju-tang, Zhang Ke-liCollege of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China

A new structural copper (II) monosalicylate, Cu(OC6H4C02)·H20, was synthesized by the rheological phase reaction method from salicylic acid and copper oxide in 1∶1 mole ratio. The structure was characterized by powder X-ray diffraction, IR and thermogravimetry. The Cu(OC6 H4 CC2)·H20 belongs to monoclinic system, with cell dimension:a=2.136 28(67),b=0. 657 84(22),c=l. 594 09(50) nm, β=108.434(25) ,V=2.125 28(83) nm3,Z=12, Dcalc=2.041 kg·L?1,D obs=2.003 kg·L?1. The crystal water was lost at 96–250°C. The determined magnetic moment and magnetic susceptibility were 1. 947 B. M. and 6. 546×10?6 (287. 20 K), respectively.

关键词： copper monosalicylate rheological phase reaction crystal structure thermal decomposition infrared spectrum

The Application of Lights-Conversed Polyethylene Film for Agriculture

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Wuhan University Journal of Natural Sciences 2002年第3期7卷 365-367页

Lanthanum-rhodamine (6G and B) complexes were synthesized by rheological phase reaction Method. Lanthanum-rhodamine (6G and B) complexes doped polyethylene films which have a function of lights-conversion were prepared. The emission and excitation spectra were measured. The experiments of growing seedling and culture were carried out in the shed built with doped and undoped polyethylene films. Lanthanum-rhodamine doped polyethylene films which have a function of lights-conversion can efficiently convert the green light in the sunlight to the red light for photosynthesis of crops, to promote the maturing of crops and raise the yield of crops.

关键词： lanthanum lights conversion polyethylene film rhodamine rheological phase reaction

LiFePO4 synthesized by a simple, low cost soft chemistry method

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LiFePO4 synthesized by a simple, low cost soft chemistry met...

RHEOLOGIGAL phase SYNTHESIS,CHARACTERISATION AND THERMAL DECOMPOSITION OF MAGNESIUM SALICYLATE:Mg（Hsal）2,（Hsal=C7H5O3-）

2006年中国固态离子学暨国际电动汽车动力技术研讨会

作者： L.N. Wang X.C. Zhan K.L. Zhang College of Chemistry and Molecular sciences Wuhan University Wuhan 430072 China Centre of Nanoscience and Nanotechnology Research Wuhan University Wuhan 430072 China

＜正＞LiFePO4 powders were synthesized by Theological phase reaction. Fine particles of LiFePO4 with good electrochemical performance achieved through very simple process and short time. The materials were characterized by thermal analysis, X-ray powder diffraction, SEM, CV and Element analysis. The electrochemical performance was investigated in terms of specific capacity, cycle performance and rate capacity. The beneficence of citric acid as a new carbon source was also reported.

关键词： Lithium iron phosphate rheological phase reaction Capacity Lithium secondary battery

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RHEOLOGIGAL PHASE SYNTHESIS,CHARACTERISATION AND THERMAL DEC...