Extended Data Fig. 9: Cycle performance of batteries with SiO2, Al2O3, and Ag coated SiO2 at anode, and the morphology analysis.
From: Fast cycling of lithium metal in solid-state batteries by constriction-susceptible anode materials
(a) Cyclig performance at 1 C of a solid-state battery with Al2O3 particles at anode. The battery structure is Al2O3&Graphite mixture-SEs-NMC83 (loading = 15 mg/cm2). A short circuit was observed after a few cycles, as lithium plates at the unwanted interface to the electrolyte layer due to a lack of ionic and electronic conductivity in Al2O3. Note that this is different from the diffusion limit to further lithiation discussed for Si, where both Li diffusion and electron conduction can still happen at the surface of Si particles. (b) FIB-SEM image of the Al2O3 layer after the 1st charge of a solid-state battery. (c) The first charge and discharge profiles at 0.5 C and (d) cylicng performance at 1 C of solid-state batteries with Ag coated SiO2 at anode, in comparision that with bare SiO2. The battery structure is SiO2&Graphite mixture-SEs-NMC83 (loading = 15 mg/cm2). A short circuit was observed at the initial charge for uncoated SiO2, similar to bare Al2O3. In contrast, coating Ag to SiO2 particles can make the battery run without a short circuit, but the migration of the coating layer with cycling could be an engineering challenge to solve in the future.
