Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (3): 402-409.doi: 10.1007/s40242-020-0091-5

• Reviews • Previous Articles     Next Articles

Artificial Solid Electrolyte Interphase Acting as “Armor” to Protect the Anode Materials for High-performance Lithium-ion Battery

WANG Haitao, TANG Yongbing   

  1. Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
  • Received:2020-04-05 Revised:2020-04-20 Online:2020-06-01 Published:2020-05-30
  • Contact: TANG Yongbing E-mail:tangyb@siat.ac.cn
  • Supported by:
    Supported by the Key-Area Research and Development Program of Guangdong Province, China(No.2019B090914003), the National Natural Science Foundation of China(Nos.51822210, 51972329), the Shenzhen Science and Technology Planning Project, China(No.JCYJ20190807172001755), the China Postdoctoral Science Foundation(No.2018M643235) and the Science and Technology Planning Project of Guangdong Province, China(No. 2019A1515011902).

Abstract: The electrochemical performances of lithium-ion batteries(LIBs) are closely related to the interphase between the electrode materials and electrolytes. However, the development of lithium-ion batteries is hampered by the formation of uncontrollable solid electrolyte interphase(SEI) and subsequent potential safety issues associated with dendritic formation and cell short-circuits during cycling. Fabricating artificial SEI layer can be one promising approach to solve the above issues. This review summarizes the principles and methods of fabricating artificial SEI for three types of main anodes:deposition-type(e.g., Li), intercalation-type(e.g., graphite) and alloy-type(e.g., Si, Al). The review elucidates recent progress and discusses possible methods for constructing stable artificial SEIs composed of salts, polymers, oxides, and nanomaterials that simultaneously passivate anode against side reactions with electrolytes and regulate Li+ ions transport at interfaces. Moreover, the reaction mechanism of artificial SEIs was briefly analyzed, and the research prospect was also discussed.

Key words: Lithium-ion battery, Artificial solid electrolyte interphase (SEI), Anode, Reaction mechanism