Research on doping of lithium-ion conductive anti-perovskite solid electrolytes for new energy vehicle lithium-ion battery
LIU Shuqin1，LIU Jun2，LI Zhiyong3
（1. Yancheng Technician College Jiangsu Province, College of Automotive Engineering, Yancheng 224002, China；
2.Jiangsu University ,College of Automotive and Traffic Engineering, Zhenjiang 212013, China； 3. Zhejiang
Kaiying New Material Co., LTD, Hangzhou 224002, China）
Abstract：The conventional liquid electrolyte of lithium-ion battery is flammable, which give rise to safety
worries. With the increasing of safety requirements of secondary battery nowadays, solid-state battery has become
a hot spot of new secondary battery in recent years. Among all kinds of solid electrolytes, the anti-perovskite elec‐
trolyte has attracted extensive attention because of its advantages of low-cost precursor, easy to be synthesized, and
outstanding processability. However, the ionic conductivity of anti-perovskite electrolyte is low, which is only
10-6-10-5 S/cm in room temperature, and limits its application in new energy vehicles. In this study, bromo-magne‐
sium co-doping is used to improve the ionic conductivity of the anti-perovskite electrolyte. More lithium vacancies
can be introduced by bromine doping on chlorine site and magnesium doping on lithium site, which reduces the
activation energy of lithium-ion migration and increases the ionic conductivity of anti-perovskite electrolyte by
4.5 times. Finally, solid state lithium metal battery is assembled with lithium cobalt oxides as active material.
The capacity retention rate of the anti-perovskite based solid-state battery reaches to 90.1% after 100 cycles at
2C rate.
刘书琴，刘 军，李志勇. 新能源汽车反钙钛矿型锂离子固态电解质掺杂改性研究[J]. 粉末冶金工业, 2023, 33(05): 113-118.
LIU Shuqin，LIU Jun，LI Zhiyong. Research on doping of lithium-ion conductive anti-perovskite solid electrolytes for new energy vehicle lithium-ion battery. Powder Metallurgy Industry, 2023, 33(05): 113-118.
2023, Vol. 33 
