Nanosized Li4Ti5O12 powders are synthesized by a polymerization-based method using ti- tanium butoxide and lithium nitrate as precursors and furfuryl alcohol as a polymerizable solvent. The prepared samples are charac...Nanosized Li4Ti5O12 powders are synthesized by a polymerization-based method using ti- tanium butoxide and lithium nitrate as precursors and furfuryl alcohol as a polymerizable solvent. The prepared samples are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Braunauer-Emmett-Teller （BET） analysis. The electrochemical performances of these Li4Ti5O12 powders are also studied. The effect of different surfactants including citric acid, polyvinylpyrrolidone, and cetyltrimethyl ammonium bromide on the structure and properties is also investigated. It is found that pure spinel phase of Li4Ti5O12 is obtained at an annealing temperature of 700 ℃ or higher. The use of surfactants can improve the powder morphology of nanosized particles with less agglomeration. With suitable annealing temperature and the addition of surfaetant, Li4Ti5O12 powders with high BET surface area and favorable electrochemical performance can be obtained.展开更多
Li Ni1-x-yCoxMnyO2材料是一种锂离子电池三元正极材料,在比容量、合成工艺以及控制成本上具有综合优势,是目前取代Li Co O2正极材料在锂离子电池市场中主流地位最具有竞争性的材料之一。对锂离子电池正极三元材料制备方法的研究进展进...Li Ni1-x-yCoxMnyO2材料是一种锂离子电池三元正极材料,在比容量、合成工艺以及控制成本上具有综合优势,是目前取代Li Co O2正极材料在锂离子电池市场中主流地位最具有竞争性的材料之一。对锂离子电池正极三元材料制备方法的研究进展进行了综述,介绍了各种制备方法的优缺点,并对其商业化应用前景进行了展望和评价。展开更多
基金V. ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20971117 and No.10979049） and the Education Department of Anhui Province （No.KJ2009A142）.
文摘Nanosized Li4Ti5O12 powders are synthesized by a polymerization-based method using ti- tanium butoxide and lithium nitrate as precursors and furfuryl alcohol as a polymerizable solvent. The prepared samples are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Braunauer-Emmett-Teller （BET） analysis. The electrochemical performances of these Li4Ti5O12 powders are also studied. The effect of different surfactants including citric acid, polyvinylpyrrolidone, and cetyltrimethyl ammonium bromide on the structure and properties is also investigated. It is found that pure spinel phase of Li4Ti5O12 is obtained at an annealing temperature of 700 ℃ or higher. The use of surfactants can improve the powder morphology of nanosized particles with less agglomeration. With suitable annealing temperature and the addition of surfaetant, Li4Ti5O12 powders with high BET surface area and favorable electrochemical performance can be obtained.
文摘Li Ni1-x-yCoxMnyO2材料是一种锂离子电池三元正极材料,在比容量、合成工艺以及控制成本上具有综合优势,是目前取代Li Co O2正极材料在锂离子电池市场中主流地位最具有竞争性的材料之一。对锂离子电池正极三元材料制备方法的研究进展进行了综述,介绍了各种制备方法的优缺点,并对其商业化应用前景进行了展望和评价。
