材料科学
沸石咪唑盐骨架
阳极
兴奋剂
锂(药物)
咪唑酯
化学工程
铈
磷化物
碳纤维
无机化学
金属有机骨架
电极
金属
复合材料
吸附
物理化学
化学
冶金
光电子学
复合数
内分泌学
工程类
医学
作者
Yanjun Zhai,Shuli Zhou,Linlin Guo,Xiaole Xin,Suyuan Zeng,Konggang Qu,Nana Wang,Xianxi Zhang
出处
期刊:Crystals
[Multidisciplinary Digital Publishing Institute]
日期:2022-04-11
卷期号:12 (4): 533-533
被引量:12
标识
DOI:10.3390/cryst12040533
摘要
Zeolitic Imidazolate Framework 67 (ZIF-67) and its derivates have attracted extensive interest for lithium-ion batteries (LIBs). Here, Cerium-doped cobalt phosphide@nitrogen-doped carbon (Ce-doped CoP@NC) with hollow polyhedron structure materials were successfully synthesized via ionic-exchange with Co and Ce ions using the ZIF-67 as a template followed with a facile low-temperature phosphorization treatment. Benefitting from the well-designed hollow polyhedron, steady carbon network, and Ce-doping structural merits, the as-synthesized Ce-doped CoP@NC electrode demonstrated superior performance as the anode in LIBs: a superior cyclability (400 mA h g−1 after 500 cycles) and outstanding rate-capability (590 mA h g−1, reverted to 100 mA g−1). These features not only produced more lithium-active sites for LIBs anode and a shorter Li-ion diffusion pathway to expedite the charge transfer, but also the better tolerance against volume variation of CoP during the repeated lithiation/delithiation process and greater electronic conductivity properties. These results provide a methodology for the design of well-organized ZIFs and rare earth element-doped transition metal phosphate with a hollow polyhedron structure.
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