So-Yeon Ham, Elias Sebti, Ashley Cronk, Tyler Pennebaker, Grayson Deysher, Yu-Ting Chen, Jin An Sam Oh, Jeong Beom Lee, Min Sang Song, Phillip Ridley, Darren H S Tan, Raphaële J Clément, Jihyun Jang, Ying Shirley Meng
All-solid-state batteries using Si as the anode have shown promising performance without continual solid-electrolyte interface (SEI) growth. However, the first cycle irreversible capacity loss yields low initial Coulombic efficiency (ICE) of Si, limiting the energy density. To address this, we adopt a prelithiation strategy to increase ICE and conductivity of all-solid-state Si cells. A significant increase in ICE is observed for Li1 Si anode paired with a lithium cobalt oxide (LCO) cathode. Additionally, a comparison with lithium nickel manganese cobalt oxide (NCM) reveals that performance improvements with Si prelithiation is only applicable for full cells dominated by high anode irreversibility...
April 6, 2024: Nature Communications