不同生产条件石油焦制备锂离子电池负极材料的性能分析
Performance Analysis of Lithium-Ion Battery Cathode Materials Prepared from Petroleum Coke under Different Production Conditions
公绪春 1王际童2
作者信息
- 1. 中国石油化工股份有限公司济南分公司,山东 济南 250101
- 2. 华东理工大学,上海 200237
- 折叠
摘要
低硫石油焦用于生产锂离子电池负极材料是提高其附加值和节约资源的一个重要途径.将不同生产工艺条件下制备的低硫石油焦经过碳化、石墨化制备锂离子电池负极材料,对物化性质和电化学性质进行了分析,探索其作为锂电负极材料的应用性.结果表明:在常规的炼厂延迟焦化装置中,低硫石油焦石墨化后首次库伦效率为 82.79%,200 次循环稳定容量为 273.1 mA·h·g-1,电流密度为 2 C(744 mA·g-1)时石墨化的低硫石油焦容量保持率为 99.4%,达到了商业电池的使用要求.结果说明低硫石油焦经过石墨化处理后在锂离子电池方面有巨大的应用潜力.
Abstract
The use of low sulfur petroleum coke in the production of cathode electrode materials for lithium-ion batteries is an important way to increase its added value and save resources.In this paper,lithium-ion battery cathode materials were prepared from low sulfur petroleum coke through carbonization and graphitization under different production process conditions.The physicochemical and electrochemical properties were analyzed to explore its application as a lithium-ion battery cathode material.The results showed that,in a conventional delayed coking unit in a refinery,the first coulombic efficiency of low sulfur petroleum coke after graphitization was 82.79%,the stable capacity after 200 cycles was 273.1 mA·h·g-1,and when the current density was 2C(744 mA·g-1),the capacity retention rate of graphitized low sulfur petroleum coke was 99.4%,meeting the requirements for commercial battery use.The results indicate that low sulfur petroleum coke has great potential for application in lithium-ion batteries through graphitization.
关键词
低硫石油焦/石墨化/锂离子电池/电化学性能Key words
Low sulfur petroleum coke/Graphitization/Lithium-ion battery/Electrochemical performance引用本文复制引用
基金项目
国家自然科学基金面上项目(21978097)
出版年
2024
NETL
NSTL
万方数据