Electrochemical Bridging-Impact Method for Characterizing the NCA@ Carbon Core–Shell Cathode

Abstract
Carbon-based core–shell (CBCS) materials have received considerable and could be the next generation of cathode materials for high energy density lithium-ion batteries (LIBs). The carbon shell provides a large interfacial area between active-material core and electrolyte for charge transport and shortened diffusion path for intercalation/de-intercalation of active species. In order to achieve high performance of CBCS cathode, tuning diffusion path is required via varying the shell-thickness. Herein, Li-Ni-Co-Al Oxide/Carbon (NCA/C) core-shell is prepared with varying shell thickness within the range of ca. 0.1 to 0.5 µm. In order to study the electrical properties of CBCS, we use the" Electrochemical Bridging-Impact" 1, 2 methodology along with a molecular dynamics (MD) simulation to investigate the ion communication between the solid-liquid interface. The bridging-impact is used to determine the contact resistance …