期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 22, 页码 26023-26033出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c04607
关键词
graphite electrode; propylene carbonate electrolyte; ethyl isothiocyanate; electrolyte additive; solid electrolyte interphase
资金
- National Key R&D Program of China [2018YFB0104400, 2016YFB0100100]
- National Natural Science Foundation of China [21972055, 21825202, 21575135, 21733012, 21972133]
- Newton Advanced Fellowships [NAF/R2/180603]
As an important invention, the lithium-ion battery has changed human life, a new additive has been discovered to improve the electrolyte performance, bringing hope for the use of PC electrolyte in LIBs.
As one of the greatest inventions in the history of electrochemistry, the lithium-ion battery (LIB) has radically transformed human beings' daily life by powering portable electronics and electric vehicles. When we look back upon the long and arduous effort devoted to the development of the LIB technology, it is found that the birth of LIBs could have been even earlier if reversible cycling of the graphite electrode had been realized in the propylene carbonate (PC) electrolyte, one of the few dominating electrolytes extensively used in nonaqueous electrochemistry long before the concept of LIBs. In this work, a functional electrolyte additive, that is, ethyl isothiocyanate, has been identified to enable the reversible Li+ ion intercalation/de-intercalation into/out of the graphite electrode in PC electrolyte by forming a high-quality solid electrolyte interphase (SEI) on the graphite electrode. A wide range of advanced in situ and ex situ spectroscopic characterization techniques coupled with theoretical calculations have been employed to understand the SEI formation mechanism. The results reported here rejuvenate the promise of PC as the primary electrolyte solvent for LIBs by artificially rectifying the interfacial electrochemical processes.
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