对苯二甲酸锂负极材料的溶剂热法合成  

Solvothermal synthesis of terephthalate lithium as negative materials

作　　者：张红霞[1] 李东林[1] 苟蕾[1] 樊小勇[1] 李倩[1] 

机构地区：[1]长安大学材料科学与工程学院能源与电子材料系,陕西西安710061

出　　处：《电源技术》2012年第4期470-473,共4页Chinese Journal of Power Sources

基　　金：陕西省自然科学基础研究计划项目(2010JQ2011);国家自然科学基金(21073021);国家自然科学基金(21103013);长安大学中央高校科研事业费资助项目(CHD2012ZD001)

摘　　要：采用溶剂热法制备了对苯二甲酸锂(tpaLi2)配位聚合物锂离子电池负极材料,并用傅里叶红外光谱分析(FTIR)、X射线粉末衍射(XRD)、X射线单晶衍射、扫描电镜(SEM)和恒电流充放电测试对其结构、形貌和充放电性能进行了表征。结果表明:材料属于单斜晶系,P2(1)/c空间群,具有三维孔洞的配位聚合物框架结构,平均粒径在7～8μm。首次充电和放电比容量分别为98、180 mAh/g,循环40次后充放电容量分别为67、68 mAh/g。通过对比实验,分析了合成方法对性能的影响,提出了改进电化学性能的途径。The terephthalate lithium （tpaLi2） coordination polymer as negative material was synthesized by solvothermal method. The samples were characterized by FTIR absorption spectra （FTIR）, X-ray diffraction （XRD）, X-ray single crystal diffraction, scanning electron microscope （SEM） and constant current charge-discharge experiment. The results show tpaLi2 is a 3D coordination polymer with micropores crystallized in monoclinic crystal system, P2（1 ）/c space group. The size of single grain is about 7-8 i^m. The initial charge and discharge capacities of this sample are 98, 180 mAh/g, respectively, and after 40 cycles the charge and discharge specific capacities remain 67 and 68 mAh/g. The impact on the performance of synthesis methods was analyzed through the contrast experiment, and the way of improving the electrochemical properties was put forward.

关 键 词：对苯二甲酸锂 配位聚合物 锂离子电池 负极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]