Multimodal evaluation of the lithium ion battery solid electrolyte interphase: quantifying elementary chemistry via in operando neutron reflectivity and electrochemical quartz crystal microbalance
The solid electrolyte interphase (SEI) is an interfacial layer that forms in lithium-ion batteries due to instability of the electrolyte at low voltages. While the SEI in theory passivates the electrolyte from further degradation, in reality continued SEI growth shortens battery lifetime and leads to myriad problems, including capacity fade, reduced charge/discharge rates, and contributions to thermal runaway and catastrophic battery fires. Despite years of study, the SEI remains a central challenge to lithium-ion battery durability, largely due to poor understanding of the basic chemistry ...
(For more, see "View full record.")