Behavior of Solid Electrolyte in Li-Polymer Battery with NMC Cathode via in-Situ Scanning Electron Microscopy

• DOI: 10.1021/acs.nanolett.9b04452
• Publication Date: 2020-02-04T21:52:10Z
• Authors: Shirin Kaboli; Hendrix Demers; Andrea Paolella; Ali Darwiche; Martin Dontigny; Daniel Clément; Abdelbast Guerfi; Michel L. Trudeau; John B. Goodenough; Karim Zaghib
• Keywords: all-solid batteries; degassing; dendrites; In situ; NMC cathode; polymer degradation;; 01 natural sciences; 7. Clean energy; 0104 chemical sciences; 3. Good health

We present the first results of in situ scanning electron microscopy (SEM) an all-solid Li battery with a nickel–manganese–cobalt–oxide (NMC-622) cathode at 50 °C and operating voltage 2.7–4.3 V. Experiments were conducted under constant current several C rates (nC rate: cycling 1/n h): C/12, C/6, C/3. The microstructure evolution during was monitored by continuous secondary imaging. found that chemical degradation solid polymer electrolyte (SPE) main mechanism for failure. This observed form gradual thinning SPE as function time, resulting gas generation from cell. also various dynamic electrochemical mechanical phenomena, SEM images, compare performance this LiFePO4 cathode.