化工进展2025，Vol.44Issue(7)：3850-3859,10.DOI:10.16085/j.issn.1000-6613.2024-0807
钠离子电池石油焦基负极/电解液的相容性
Compatibility of petroleum coke based anodes and electrolytes in sodium ion batteries
摘要
Abstract
To meet the demand for high specific capacity and low-cost electrochemical energy storage materials in new energy generation technology,this paper utilized techniques such as quantum mechanics,molecular dynamics calculations,and electrochemical analysis testing to investigate the adaptability of petroleum coke based sodium ion battery anodes which were developed in the author's laboratory to electrolytes.The petroleum coke based anode materials developed in the laboratory had significant amorphous carbon structural characteristics,which contributed to the insertion/extraction of Na+.The charge and discharge tests were completed within the range of 0.01-2.5V.In the first charge discharge cycle,the specific discharge capacities of ester and ether electrolytes were 406.00mAh/g and 381.91mAh/g,with coulombic efficiencies of 85.04%and 90.42%,respectively.In the range of(0.1-3)C,ether electrolytes had better battery magnification performance.Compared to ester electrolytes,ether electrolytes had a higher LUMO energy level and better reduction stability,therefore it was easier for ether to form a thin and stable SEI film on the electrode surface,which helped to reduce the migration impedance of Na+.In addition,in the bulk electrolyte,the migration rate of Na+in ether electrolytes was about twice that of ester electrolytes.The infrared and Raman spectroscopy results of the electrolyte indicated that compared with ester electrolytes,PF6-in ether electrolytes was more likely to enter the solvated shell and form coordination with Na+,which was related to the weak solvation characteristics of ether solvents.The sodium storage behavior of petroleum coke based cathodes in typical electrolytes were analyzed systematically in this study,which helped to promote the application of petroleum coke based anodes and provided theoretical and experimental basis for the development of low-cost,high specific capacity sodium ion battery technology.关键词
石油焦/钠离子电池/负极/电解液/溶剂化Key words
petroleum coke/sodium-ion battery/anode/electrolyte/solvation分类
信息技术与安全科学引用本文复制引用
王阳峰,蔡海乐,张舒冬,朱紫宸,所聪,杨雁,侯栓弟..钠离子电池石油焦基负极/电解液的相容性[J].化工进展,2025,44(7):3850-3859,10.基金项目
大连市重点科技研发计划(2023YF14GX021). （2023YF14GX021）
