棉纤维基碳@FeP复合材料的制备及储钠性能研究  

Preparation and sodium storage performance of cotton fiber based carbon@Fep composite materials

作　　者：黄天涛 李博文 向薇蓉 李良飞 魏宇枫 靳艾平 余灵辉 彭俊军 HUANG Tiantao;LI Bowen;XAING Weirong;LI Liangfei;WEI Yufeng;JIN Aiping;YU Linghui;PENG Junjun(College of Chemistry and Chemical Engineering,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]武汉纺织大学化学与化工学院,湖北武汉430200

出　　处：《湖北大学学报（自然科学版）》2024年第4期469-477,共9页Journal of Hubei University：Natural Science

基　　金：湖北省教育厅科学技术研究计划重点项目(D20191704);武汉纺织大学科技创新研发项目(20236079)资助。

摘　　要：废弃纺织品转化为电化学储能材料引起人们的广泛关注,在碳材料中掺杂渡金属化合物作为钠离子电池负极材料具有更佳的电化学性能。本实验以废旧棉织物为碳源,硝酸铁作为催化剂,经过高温碳化得到了棉纤维基碳化铁(CFC)的复合材料,然后通过气相磷化的方法将CFC转化成棉纤维基石墨碳包覆的磷化铁复合材料(CFGC@FeP)。本文中对CFC、CFGC@FeP进行储钠性能分析,从而研究磷化铁掺杂对钠离子电池硬碳负极的影响,结果表明:将CFC、CFGC@FeP组装成半电池,可以发现CFGC@FeP具有更佳的首次库伦效率和倍率性能。CFGC@FeP在0.05 A·g^(-1)电流密度下充放电时ICE可以达到87.6%,ICE远高于CFC。同时,可以看到CFGC@FeP在5 A·g^(-1)进行充放循环500圈后,比容量为130 mAh·g^(-1),容量保持率达到96%,倍率性能良好。Converting waste textiles into electrochemical energy storage materials has attracted wide attention.Doping ferryl metal compounds into carbon anode materials for sodium-ion batteries delivers better electrochemical performance.In this experiment,the composite material of cotton fiber-based carbon-iron compounds(CFC)was prepared by high temperature carbonization with waste textile as the carbon source and iron nitrate as the catalyst,and then CFC was converted into cotton fiber-based graphitic carbon-coated iron phosphide composites(CFGC@FeP)by gas-phase phosphatization.Herein,the sodium storage performance of CFC and CFGC@FeP was analyzed so as to investigate the effect of doping iron phosphide on the hard carbon anode.The results show that when CFC and CFGC@FeP are assembled into a half battery,CFGC@FeP has better initial coulombic efficiency and multiplicity performance,which can reach a high ICE of 87.6%at 0.05 A·g^(-1).This result is much higher than the CFC.Moreover,a good rate capability of 130 mAh·g^(-1)at 5A·g^(-1)is realized,retaining 96%of initial capcity after 500 cycles.

关 键 词：棉纤维碳 气相磷化 磷化铁 钠离子电池 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]