|
|
|
| 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.
|
|
Received: 22 April 2022
|
|
|
|
|
|
|
2023, Vol. 33 
