Page 160 - 《精细化工》2020年 第10期

第 37 卷第 10 期 精 细 化 工 Vol.37, No.10
2020 年 10 月 FINE CHEMICALS Oct. 2020

有机电化学与工业
高容量硅基负极材料及其厚膜成型技术和性能

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丁 波 ，蔡振飞 ，马扬洲 1,2* ，张世宏 ，宋广生
（1. 安徽工业大学 材料科学与工程学院 先进金属材料绿色制备教育部重点实验室，安徽 马鞍山
243000；2. 西安交通大学 陕西省先进储能电子材料与器件工程研究中心，陕西 西安 710049）
摘要：为了缓解硅基负极材料的体积膨胀并改善其电化学性能，以 Mg、SiO 和石墨（G）为原料，成功制备出
一种多相 Si-MgO-G 复合材料。探讨了不同高能球磨工艺对 Mg 和 SiO 反应程度的影响及厚膜成型技术的应用。
结果表明，当高能球磨（1+5） h 后，Mg 和 SiO 原位反应生成 Si-MgO 产物，将反应产物与石墨混磨制备成多
相 Si-MgO-G 复合材料。用 XRD、SEM 和 TEM 等手段对制得材料的结构、形貌和成分进行分析，证实了复合
材料是由 Si、MgO 和石墨组成，其中 Si(220)//MgO(200)之间存在晶面共格关系。用 CV 和 EIS 等对捏合开炼厚
膜技术制得负极极片进行电化学性能分析，结果表明，捏合开炼工艺制备的厚膜极片的厚度、活性物质载量和
首圈面积比容量分别约为薄膜极片的 7.4 倍、6.0 倍和 6.2 倍。简单、绿色的厚电极制备技术可提高锂离子电池
的面积比容量。
关键词：高能球磨；捏合开炼；硅基负极材料；氧化亚硅；锂离子电池；有机电化学与工业
中图分类号：TQ645.5+6；TB34 文献标识码：A
文章编号：1003-5214 (2020) 10-2090-09 开放科学 (资源服务) 标识码 (OSID)：

Thick electrode forming technology and properties of

high capacity silicon-based anode materials

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DING Bo , CAI Zhenfei , MA Yangzhou 1,2* , ZHANG Shihong , SONG Guangsheng
（1. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education,
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243000, Anhui, China;
2. Shaanxi Province Advanced Energy Storage Electronic Materials and Devices Engineering Research Center , Xi'an
Jiaotong University, Xi'an 710049, Shaanxi, China）
Abstract: In order to alleviate the volume expansion and achieve the improvement electrochemical properties
of silicon-based anode materials, a multiphase Si-MgO-G composite material was prepared using Mg, SiO
and graphite as raw materials. The effect of different high energy ball milling process on the reaction degree
of Mg and SiO were studied, and the application of thick electrode forming technology was discussed. The
results showed that after high-energy ball milling for (1+5) h, Mg and SiO reacted in situ to produce
Si-MgO product, and the reaction product was then mixed with graphite to prepare multiphase Si-MgO-G
composite materials. The structure, morphology and phase constitution of the prepared silicon-based anode
composite materials were characterized by XRD, SEM and TEM. It was found that the composite was
composed of Si, MgO and graphite, and there was an interface coherent relationship of Si(220)//MgO(200).
The electrochemical performances were analyzed by CV and EIS. The results indicated that the thickness,
active material load and first area specific capacity of the SMG-6h thick electrode prepared by kneading and
open milling process were about 7.4, 6.0 and 6.2 times of the thin electrode. This process demonstrates that
simple, green thick electrode forming technique can increase the area specific capacity of lithium-ion batteries.
Key words: high energy ball milling; kneading and open milling; silicon-based anode material; silicon
monoxide; lithium-ion batteries; electro-organic chemistry and industry

收稿日期：2020-03-24; 定用日期：2020-06-09; DOI: 10.13550/j.jxhg.20200235
基金项目：高端外专项目（G20190219004）；安徽省自然科学基金面上项目（1908085ME151）；安徽省高端人才项目（DT18100044）
作者简介：丁 波（1986—），男，博士生，E-mail：www024151@163.com。联系人：马扬洲（1987—），男，博士，讲师，E-mail：
yangzhou.ma@outlook.com；宋广生（1963—），男，博士，教授，E-mail：song_ahut@163.com。