1701
(Invited) Sulfide-Based Solid Electrolytes for Solid State Batteries

Tuesday, 3 October 2017: 15:00
National Harbor 7 (Gaylord National Resort and Convention Center)
C. Liang (Contemporary Amperex Technology Limited)
Sulfide-Based Solid Electrolytes for Solid State Batteries

Chengdu Liang , Yongsheng Guo, Chengyong Liu

Research Institute,

Ningde Contemporary Amperex Technology Limited´╝î

Fujian Province 352100, China

The energy density of lithium ion batteries is now approaching the theoretical limit. Therefore, the development of next-generation batteries is of great technical interest nowadays. Solid state lithium batteries have attracted considerable attention because the replacement of an organic liquid electrolyte with a safer and more reliable inorganic solid electrolyte simplifies the battery design and improves safety and durability of the battery [1].

A crucial material to develop solid state batteries is a solid electrolyte with high Li+ ion conductivity at room temperature. Among different kinds of solid electrolytes, inorganic sulfide-based solid electrolytes are one of the most promising candidates for solid state lithium batteries due to the high ionic conductivity, wide electrochemical window and ease of forming framework structures [2-3]. However, there are still many challenges for the commercialization of solid state lithium batteries with sulfide-based electrolyte [4-5], for instance, the electrolyte/electrodes interface and air stability of sulfide-based electrolytes need to be further improved, and advanced manufacturing technologies are required as well.

In this presentation, several strategies to enhance ionic conductivity of sulfide-based solid electrolytes are deliberated; an ionic conductivity as high as 3.0 mS/cm has been achieved. We will then summarize the research progresses of solid state lithium batteries with sulfide-based electrolytes based on our work. Future research trends and perspectives for facilitating further improvement on the performance of sulfide-based solid state batteries will also be discussed.

Reference

 

[1] CW Sun, Nano Energy 33 (2017) 363.

[2] ZC Liu, CD Liang, J. Am. Chem. Soc., 135(3) (2013) 975.

[3] D. Liu, Materials Science and Engineering B 213(2016)169.

[4] A. Sakuda, Solid State Ionics 285 (2016) 112.

[5] J. C. Bachman, Chem. Rev. 2016, 116, 140.



*Corresponding author.

Email: LiangCD@Catlbattery.com.