【作者】 尹盛玉； 王小艳； 李玲； 陈熙； 张克立；

【Author】 YIN Sheng-yu,WAN Xiao-yan,LI Ling,CHEN Xi,ZHANG Ke-li~* (College of Chemistry and Molecular Sciences,Wuhan University,Wuhan Hubei 430072)

【机构】 武汉大学化学与分子科学学院；

【摘要】 以尿素为燃料,首次采用燃烧法合成一种新型的锂离子电池负极材料钛酸钠锂Na₂Li₂Ti₆O₁₄,XRD粉末衍射结果表明在600℃的燃烧温度下得到的样品为纯相的目标产物钛酸钠锂,随着燃烧温度升高其特征衍射峰强度增加,结晶度提高。扫描电镜显示样品为无规则形状的颗粒或颗粒的聚集体。恒流充放电测试结果表明在800℃下制备的样品充放电平台在1.3 V左右,并具有良好的循环稳定性。更多还原

【Abstract】 Using urea as fuel,sodium lithium titanate Na₂Li₂Ti₆O₁₄ as negative electrode for lithium ion batteries has been successfully synthesized by combustion method for the first time.X-ray diffraction result indicates that the pure phase Na₂Li₂Ti₆O₁₄ has been obtained at 600℃and the relative intensities and the crystallinity increased with the increasing of the ignition temperature.SEM images present the samples are composed of irregular particles or agglomerated particles.Electrochemical measurement demonstrates that the sample prepared at 800℃owns the discharged and charged potential plateaus about 1.3V and exhibits the excellent cycling performances.更多还原