酸化的硅铁合金基锂离子电池负极材料的研究  

Study on anode material of acidified ferrosilicon alloy based lithium ion battery

作　　者：李小瑞[1] 李晓叶 杨晓武[1] 李鑫[1] 王娜 LI Xiao-rui;LI Xiao-ye;YANG Xiao-wu;LI Xin;WANG Na(College of Chemistry and Engineering,Shaanxi University of Science Technology,Xi'an Shaanxi710021,China)

机构地区：[1]陕西科技大学化学与化工学院

出　　处：《电源技术》2019年第6期924-927,共4页Chinese Journal of Power Sources

摘　　要：为了改善锂离子在硅基负极材料中脱嵌过程中对硅材料造成的体积效应,提高其电化学性能,将硅铁合金作为负极材料时进行了酸化处理,并就粘结剂的用量对负极材料的影响进行研究。结果表明,酸化后的负极材料呈现孔洞结构,这就给锂离子脱嵌时发生的体积膨胀预留了空间,且当粘结剂含量为20%时,负极浆料呈现出均匀稳定的分散结构,首次放电比容量达到2 600 mAh/g,循环100圈后,库仑效率仍保持在97%左右。In order to improve the silicon volume expansion during lithium deintercalation in silicon based anode materials and enhance the electrochemical performance, the acidified ferrosilicon alloys were used in this paper as negative electrode material, the influence of the amount of binder for anode materials were also discussed. It was concluded that the acidification of the anode material is porous which can reserve space for volume expansion during lithium deintercalation in silicon, and when the binder content is 20%, the negative dispersion structure was characterized by uniform and stable, the first discharge specific capacity is 2600mAh/g, after 100 cycles, the efficiency is still in the Kulun about 97%.

关 键 词：锂离子电池 负极材料 酸化处理 硅铁合金 金基 电化学性能 放电比容量 体积效应 

分 类 号：TM912[电气工程—电力电子与电力传动]