MoP纳米粒子锂离子电池负极材料的制备及其电化学性能

doi:10.11901/1005.3093.2017.793

材料研究学报

2019, Vol. 33

Issue (1): 65-71 DOI: 10.11901/1005.3093.2017.793

研究论文

本期目录 | 过刊浏览

MoP纳米粒子锂离子电池负极材料的制备及其电化学性能

肖雅丹,靳晓哲,黄昊(

),吴爱民,高嵩,刘佳

大连理工大学材料科学与工程学院三束材料改性教育部重点实验室大连 116024

Preparation and Electrochemical Behavior of MoP Nanoparticles as Anode Material for Lithium-ion Batteries

Yadan XIAO,Xiaozhe JIN,Hao HUANG(

),Aimin WU,Song GAO,Jia LIU

Key Laboratory of Materials Modification by Laser, Ion and Electron Beams Ministry of Education, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

引用本文:

肖雅丹,靳晓哲,黄昊,吴爱民,高嵩,刘佳. MoP纳米粒子锂离子电池负极材料的制备及其电化学性能[J]. 材料研究学报, 2019, 33(1): 65-71.
Yadan XIAO, Xiaozhe JIN, Hao HUANG, Aimin WU, Song GAO, Jia LIU. Preparation and Electrochemical Behavior of MoP Nanoparticles as Anode Material for Lithium-ion Batteries[J]. Chinese Journal of Materials Research, 2019, 33(1): 65-71.

全文: PDF(5645 KB) HTML

摘要:

用直流电弧等离子体法制备金属钼纳米粉体再使其与赤磷发生固相反应，用两步法制备出磷化钼纳米粒子。使用X射线衍射(XRD)和透射电镜(TEM)等手段表征磷化钼纳米粒子的结构并进行了电化学性能测试。结果表明，MoP纳米粒子呈球状，粒径为20~50 nm；在电流密度为100 mA/g的条件下MoP纳米粒子负极材料的首次放电比容量达到746 mAh/g，50次循环后放电比容量为241.9 mAh/g；电流密度为2000 mA/g时放电比容量为99.90 mAh/g，电流密度恢复到100 mA/g其放电比容量仍然保持247.60 mAh/g。用作锂离子电池的负极材料，MoP纳米粒子具有优异的稳定性和可逆性。

关键词 ：无机非金属材料, 磷化钼, 直流电弧法, 电化学性能, 锂离子电池, 负极材料

Abstract：

Molybdenum phosphide (MoP) is successfully prepared by a facile 2-step process. First as precursor, nano metal Mo-powders were prepared via DC arc plasma method, which then react with red phosphorus through solid-phase reaction to yield MoP nanoparticles. The prepared MoP nanoparticles were further characterized by means of XRD and TEM. Results show that the MoP nanoparticles are spherical with particle diameter of 20-50 nm. As the anode material for lithium-ion batteries, MoP nanoparticles deliver the initial discharge capacity of 746 mAh/g at the current density of 100 mA/g and the capacity maintains at 241.9 mAh/g after 50 charge-discharge cycles. As the current density increased to 2000 mA/g the discharge capacity decreases to 99.90 mAh/g. The constant capacity of 247.60 mAh/g can be restored when the current density is back to 100 mA/g.

Key words： inorganic non-metallic materials molybdenum phosphide nanoparticles DC arc disch-arge electrochemical perfor-mance lithium-ion battery anode material

收稿日期: 2018-01-19

ZTFLH:

O646，TM912.9

基金资助:中央高校基本科研业务费重点实验室专项经费(DUT17ZD101);国家自然科学基金(51171033);常州工业支撑计划(CE20160022)

作者简介: 肖雅丹，女，1995年生，硕士生

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链接本文:

https://www.cjmr.org/CN/10.11901/1005.3093.2017.793 或 https://www.cjmr.org/CN/Y2019/V33/I1/65

图1 MoP的XRD图谱和晶体结构的示意图

图2 在不同放大倍率下Mo和MoP的TEM照片

图3 MoP纳米粒子的循环伏安曲线

图4 MoP纳米粒子负极材料在100 mA/g电流密度条件下的充放电曲线和循环性能，以及在不同电流密度下的倍率性能表征

图5 MoP负极材料EIS对比图和拟合等效电路图

表1 MoP负极材料模拟电路参数

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