复合材料xLiFePO4·yLi3V2(PO4)3的合成及电化学性能(英文)

马平平; 刘志坚; 夏建华; 陈宇; 胡朴; 卢志超; 夏定国

doi:10.61558/2993-074X.2876

电化学 >

2012 , Vol. 18 >Issue 1: 31 - 36

DOI: https://doi.org/10.61558/2993-074X.2876

研究论文

复合材料xLiFePO4·yLi3V2(PO4)3的合成及电化学性能(英文)

马平平 ,
刘志坚 ,
夏建华 ,
陈宇 ,
胡朴 ,
卢志超 ,
夏定国

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1．中国钢研科技集团公司，北京 100081；2．北京中新联数码科技有限公司，北京 100041；3．北京大学工学院，北京 100871

收稿日期: 2011-09-28

修回日期: 2011-10-28

网络出版日期: 2011-11-30

基金资助

This work was financially supported by National High Technology Research and Development Program of China (No. 2008AA03Z208)

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Synthesis and electrochemical performance of xLiFePO4·yLi3V2(PO4)3 composites

MA Ping-Ping ,
LIU Zhi-Jian ,
XIA Jian-Hua ,
CHEN Yu ,
HU Pu ,
LU Zhi-Chao ,
XIA Ding-Guo

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1. China Iron and Steel Research Institute Group, Beijing 100081, China; 2. Beijing Central Press Union Technology Co LTD., Beijing 100041, China; 3. College of Engineering, Peking University, Beijing 100871, China

Received date: 2011-09-28

Revised date: 2011-10-28

Online published: 2011-11-30

Supported by

This work was financially supported by National High Technology Research and Development Program of China (No. 2008AA03Z208)

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摘要

采用固相法合成了不同比例的xLiFePO4·yLi3V2(PO4)3 复合物. 利用XRD、SEM和电化学测试仪等分析方法表征了所有样品的特性. 结果表明，样品0.95LiFePO4·0.05Li3V2(PO4)3 以0.2 C的充放电倍率放电时具有162.7 mAh/g的电化学容量，同时该样品表现出了较其它样品更优异的循环稳定性和更良好的导电性能，不同倍率下循环60周后，其容量保持率高达98.7%. 颗粒细小的尺寸和均一的分布使得样品0.95LiFePO4?0.05Li3V2(PO4)3具有良好的电化学性能.

关键词： 锂离子电池; 复合物; 掺杂; xLiFePO4·yLi3V2(PO4)3

本文引用格式

马平平 , 刘志坚 , 夏建华 , 陈宇 , 胡朴 , 卢志超 , 夏定国 . 复合材料xLiFePO4·yLi3V2(PO4)3的合成及电化学性能(英文)[J]. 电化学, 2012 , 18(1) : 31 -36 . DOI: 10.61558/2993-074X.2876

Abstract

A series of xLiFePO4·yLi3V2(PO4)3 composites were systematically synthesized through solid state reactions by variations in the proportions of LiFePO4 and Li3V2(PO4)3. The properties of the prepared compounds were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurements. The capacity of 162.7 mAh/g at 0.2 C rate was obtained with the relatively good cycle stability and good conductivity for 0.95LiFePO4·0.05Li3V2(PO4)3 due to more uniformed distributed and smaller particle sizes.

Key words： lithium ion batteries; composite; doping; xLiFePO4·yLi3V2(PO4)3

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