有机-无机杂化材料PANI/V_2O_5的制备及其电化性能  

Synthesis and Electrochemical Properties Organic-Inorganic Hybrid Material PANI/ V_2O_5

作　　者：刘恩辉[1] 李新海[1] 侯朝辉[1] 何则强[1] 邓凌峰[1] 

机构地区：[1]中南大学冶金科学与工程学院冶金物理化学研究所,长沙410083

出　　处：《材料导报》2004年第5期100-102,共3页Materials Reports

摘　　要：利用V_2O_5凝胶前驱体和苯胺单体在溶液中原位氧化聚合制备了V_2O_5和聚苯胺(PANI)的有机-无机PANI/V_2O_5杂化材料,分别利用X-射线衍射(XRD)、热分析(TG-DTA)、扫描电镜(SEM)、红外光谱(FT-IR)技术对杂化材料进行了表征。用PANI/V_2O_5作为二次锂电池的正极材料,利用恒电流充放电技术对其进行电化学性能研究,实验表明该杂化材料具有较高的首次插锂容量,在0.1C放电倍率和1.50～4.0V的电压范围内具有288mA·h·g^(-1)的首次放电容量,在0.3C的放电倍率下循环30次后保持180mA·h·g^(-1)的放电容量。Organic-inorganic PANI/V_2O_5 hybrid materials of V_2O_5 with polyaniline(PANI) were prepared from V_2O_5 gel precursor and aniline monomer by in situ oxidative polymerization of aniline in the solution. The PANI/V_2O_5 hybrid materials were characterized using X-ray diffraction(XRD), differential thermal analysis-thermo-gravimetry(DTA-TG), scanning electron microsopy(SEM), Fourier transform infrared spectroscopy (FT-IR) measurements. The electrochemical behavior of the PANI/V_2O_5 was studied by galvanostatic charge-discharge technique as a cathode material for rechargeable lithium batteries. The experiment shows that the hybrid materials have higher first intercalation lithium capacity, giving 288 mA·h·g^(-1) the first discharge capacity at 0.1C rate, and maintaining a discharge capacity of 180mA·h·g^(-1) at 0.3C rate over the voltage range of 1.5～4.0 V after 30 cycles.

关 键 词：有机-无机杂化材料 PANI/V2O5杂化材料 电化性能 正极材料 放电容量 

分 类 号：TB331[一般工业技术—材料科学与工程]