基于有机磷酸类MOFs前驱体制备Ni2P/C复合材料  

Synthesis of Organodiphosphonate MOFs-derived Ni_2P/C Composite

作　　者：徐丹[1] 肖珊珊 吴攀 潘莹[1] 陈丽华[2] 苏宝连[2] 薛铭[1] 裘式纶[1] 

机构地区：[1]吉林大学化学学院,无机合成与制备化学国家重点实验室,长春130012 [2]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《高等学校化学学报》2018年第1期19-24,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号：21390394,21571076,21671155); 化学品安全控制国家重点实验室开放课题(批准号：SKL-038)资助~~

摘　　要：以镍为金属中心、对二甲苯二磷酸为有机配体,构筑了一种有机磷酸类Ni-MOF前驱体,再经过一步碳化,原位制备出多孔碳包覆Ni_2P纳米颗粒的复合材料.该复合材料保留了前驱体的片状形貌,比表面积可达202 m2/g,复合材料中的Ni_2P纳米颗粒具有良好的结晶度,颗粒均匀且无团聚现象.在锂离子电池性能测试中,该Ni_2P/C复合结构在缓解材料体积膨胀的同时提高了材料的电子和离子电导率,进而提高了材料的电化学性能.在0.2 C的电流密度下,材料首次充、放电比容量分别为247和226 m A·h·g-1,库仑效率可达91.7%,循环200圈后,库仑效率接近100%.Ni and organodiphosphonate-based metal organic framework（ Ni-MOF） was synthesized under hydrothermal condition using p-xylylenediphosphonate as the organic ligand. Then,Ni-MOF was selected to prepare the amorphous carbon coated Ni_2 P composite materials by facile method. The composite material retained the lamellate shape of the precursor,and the BET surface area reached 202 m2/g. The Ni_2 P nanoparticles in the composites had good crystallinity,and the particles were homogeneous and had no reunion. In the performance of lithium ion battery,the Ni_2 P/C composite structure improved the electron and ion conductivity of the material while reducing the volume expansion of the material,thus improving the electrochemical properties of the material. The first charge and discharge capacity of Ni_2 P/C composite material were 247 and226 m A·h·g-1,respectively,coulombic efficiency can reach 91. 7%,and the coulombic efficiency reaches100% after 200 cycles.

关 键 词：金属有机骨架 碳化 Ni2P/C复合材料 锂离子电池 

分 类 号：O614.81[理学—无机化学] O646[理学—化学]