摘要
较差的倍率性能和循环性能制约了钠离子电池的发展。通过制备不同类型的碳酸酯类电解液和醚类电解液,研究电解液对钠离子电池碳负极材料电化学性能的影响。研究表明,采用醚类电解液时,硬碳负极材料展现了较好的电化学性能。在30 mA/g的电流密度条件下,可逆容量为235 mAh/g。当电流密度提高到1 000 mA/g时,仍保有180 mAh/g的容量,且库伦效率稳定在99.9%以上。硬碳负极材料在醚类电解液中可以更快地形成完整的SEI膜,且成分更有利于Na+的快速传输,使钠离子电池拥有优越的循环性能和倍率性能。
The poor rate performance and cycle performance restrict the development of sodium ion battery.By preparing different kinds of carbonate electrolyte and ether electrolyte,the influence of electrolyte on the electrochemical performance of carbon anode material for sodium ion battery was studied.The results show that when the ether electrolyte is used,the hard carbon anode material shows good electrochemical performance.At a current density of 30 mA/g,the reversible capacity is 235 mAh/g.When the current density is increased to 1000 mA/g,the capacity of 180 mAh/g is still maintained,and the coulomb efficiency is stable above 99.9%.The hard carbon anode material can form a complete SEI film in ether electrolyte more quickly,and the composition is more conducive to the rapid transmission of Na+,which makes the sodium ion battery have superior cycle performance and rate performance.
作者
李泽林
李文挺
张超
刘伟
彭军
安胜利
邱新平
LI Ze-lin;LI Wen-ting;ZHANG Chao;LIU Wei;PENG Jun;AN Sheng-li;QIU Xin-ping(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Department of Chemistry,Tsinghua University,Beijing 100084,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《通信电源技术》
2020年第7期40-45,共6页
Telecom Power Technology
关键词
醚类电解液
碳酸酯类电解液
硬碳
钠离子电池
ether electrolyte
carbonate electrolyte
hard carbon
sodium ion battery
