Lithium-ion battery (LIB) is the most popular electrochemical device ever invented in the history of mankind. It is also the first-ever battery that operates on dual-intercalation chemistries, and the very first batter. ••Interfaces and interphases are two separate but closely. In battery literature, the two words “interface” and “interphase” are often used interchangeably, yet they represent two very distinct concepts.Interface is wher. Given the critical importance carried by interphase, there have been focused efforts dedicated to their study. Thus far we have well understood the correlation between the electrolyte comp. The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Kang Xu reports was provided by JCESR, an Ener. The author thanks the Joint Center of Energy Storage Research (JCESR) for the financial support. JCESR is an energy hub funded by US Department of Energy Basic Energy Science.