In-situ Battery Cycling and Observation with SEM-EDS-SXES
Solid-state battery systems offer key advantages over conventional lithium-ion batteries. They are capable of higher energy density, faster charging and can withstand more charge cycles leading to longer life. These solid-state systems have the added advantage of being able to operate over a wider temperature range compared with liquid based systems and with the elimination of potentially flammable liquid electrolytes they are inherently safer. However, before we see widespread commercial use, there are some key technology challenges that need to be overcome. A few examples of the challenges researchers are working on include interfacial resistance at the electrode-solid electrolyte interface and volume changes of electrodes during the charge/discharge cycle which can result in mechanical instability. Consider, lithium migration into and out of a silicon anode during a battery charge/discharge cycle. This process can result in a 3-fold or more expansion/contraction of the anode, potentially severing ionic conduction pathways and ultimately reducing cycle life.
Real-time observation and analysis during the charge-discharge cycle can provide critical insights into the chemical and structural changes that occur within these solid-state battery systems. JEOL offers unique opportunities for this type of study from sample preparation to in-situ observation, all under an air-isolated workflow to protect components that are reactive to air.