Rachel Carter¹, Connor Fear², Aashutosh Mistry², Partha Mukherjee², Corey T. Love¹; ¹US Naval Research Laboratory, ²Purdue University

There is a level of stochasticity to lithium-ion battery failures. Often the products of one (electro)chemical reaction participate as reactants in a subsequent reaction. The origins of these reactions are heavily dependent upon material properties and electrochemical stability as well as environmental and operational conditions. As degradation processes occur, performance (a measurable quantity) often declines along with state-of-health (largely immeasurable). This talk will discuss the electrochemical, mechanical and thermal origins of cell instability observed in our laboratory though a variety of in-operando and nondestructive characterization techniques. Decoupling these battery instability onset factors is important to successfully gauge battery state-of-health.