Sungjemmenla, S. K., V., Soni, C. B., Kumar, V., & Seh, Z. W. (2022). Understanding the Cathode–Electrolyte Interphase in Lithium‐Ion Batteries. Energy Technology, 2200421. Portico. https://doi.org/10.1002/ente.202200421
The electrode–electrolyte interface is one of the major components enabling Li-ion batteries (LIBs) to function reversibly. Often, the solid–electrolyte interphase (SEI) at the anode is regarded as the key interface that determines the cycle life, capacity fade, and overall safety of batteries. There are a plethora of SEI literatures that exist; however, the cathode–electrolyte interphase (CEI) remains relatively unexplored. Unlike in the case of SEI, a detailed understanding of CEI formation and its association with battery performance is not present. This review gives insight into the recent progress in understanding the CEI in LIBs. Though there is a relative dearth of literature, the CEI is generally considered as a heterogeneous multicomponent film formed due to the decomposition of electrolyte at the cathode surface. Besides understanding the thermodynamic properties and relevant kinetic reactions, one of the main challenges lies in developing and stabilizing the CEI layer due to its complex structural composition. Extensive research efforts to engineer a stable CEI are reviewed, including the use of electrolyte additives, artificial engineering, and heteroatom doping of cathode. Furthermore, promising characterization techniques and future outlook in forming a robust CEI for both existing LIB and post-LIB systems are highlighted.
This research / project is supported by the National Research Foundation - NRF Fellowship
Grant Reference no. : NRF-NRFF2017-04
This research is supported by core funding from: SERC
Grant Reference no. : NA
Scholarship awarded by the Indian Institute of Technology Delhi (IIT Delhi), and University of Queensland-IIT Delhi Academy of Research (UQIDAR).
This is the peer reviewed version of the following article: Sungjemmenla, S. K., V., Soni, C. B., Kumar, V., & Seh, Z. W. (2022). Understanding the Cathode–Electrolyte Interphase in Lithium‐Ion Batteries. Energy Technology, 2200421. Portico. https://doi.org/10.1002/ente.202200421, which has been published in final form at doi.org/10.1002/ente.202200421. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.