Cryo-ultramicrotomy enables TEM characterization of global lithium/polymer interfaces

Abstract

Lithium electrochemistry dictates the safety and cycling durability of lithium metal batteries. Although there are numerous spectroscopy studies of lithium in liquid electrolyte batteries, electron microscopy studies of lithium in...

In Situ/Operando Imaging Techniques for Next-Generation Battery Analysis

“…Indeed, the EELS method is also a useful technique for observing Li ion dynamics within the cathode system. Due to the ability to detect elements with low atomic numbers like Li, the EELS technique has been widely utilized in the analysis of Li-based batteries. − Moreover, based on the analysis of energy loss after passing through the sample, EELS is known for its capability to perform atomic to nanoscale imaging in addition to electron-transmitting analysis methods like (S)TEM. , In this case, simultaneously combined with scanning transmission electron microscopy (STEM), the Li insertion/extraction reactions occurring at the conventional battery cathode were analyzed. , This approach has also been applied to all-solid-state battery systems, yielding research results on the presence of side reactions occurring at the LCO/LiPON interface Figure c shows the Li concentration mapping during a 0.6 C-rate charge obtained by EELS mapping .…”

An integrated “rigid–flexible” strategy by side chain engineering towards high ion-conduction cationic covalent organic framework electrolytes

“…Solid polymer electrolytes (SPEs), typically poly(ethylene oxide) (PEO), poly(methyl methacrylate) (PMMA) and poly(vinyl alcohol) (PVA), have been investigated widely. 11–17 Their excellent processability, low cost, and tunable interfacial compatibility provide opportunities for the realization of SSLMBs. Unfortunately, the poor ion conductivity at ambient temperature (<10 −4 S cm −1 ), lower cation transference number (0.2–0.4), and oxidative decomposition at high potentials of SPEs seriously prohibit their further application.…”