粒径级配对石墨基负极材料电化学性能的影响  

Effects of particle size grading on electrochemical properties of graphite anode materials

作　　者：张鑫 雷维新 潘俊安 潘勇 罗振亚 ZHANG Xin;LEI Wei-xin;PAN Jun-an;PAN Yong;LUO Zhen-ya(School of Materials and Engineering,Xiangtan University,Xiangtan Hunan 411105,China)

机构地区：[1]湘潭大学材料科学与工程学院,湖南湘潭411105

出　　处：《电源技术》2020年第3期318-321,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金青年项目(11602213)。

摘　　要：粒径级配是按一定的配比将不同粒度的散状物料混合的方法。研究了锂离子电池石墨基负极粒径级配后对电极极片力学性能与电池电化学性能的影响规律。实验结果表明,粒径级配之后,锂离子电池负极极片抗拉伸能力变强,电化学性能也有所提升,当6μm石墨或6μm硅替换量为20%时粒径级配,循环100次后比粒径级配前比容量分别提升22%和68%。Particle size gradation is a method to mix bulk materials with different particle size according to a certain proportion.The effect of graphite-based anode size gradation on the mechanical properties and electrochemical properties of lithium-ion batteries was studied.It was found that after particle size grading,the tensile strength and electrochemical performance of the negative electrode of lithium ion battery became stronger.Particle size grading when the replacement amount of 6μm graphite or 6μm silicon is 20%,after 100 cycles,the capacity is increased by 22% and 68% respectively compared with that before particle size grading.

关 键 词：锂离子电池 混合石墨负极材料 粒径级配 

分 类 号：TM912[电气工程—电力电子与电力传动]