| 초록 |
In this work, we demonstrates that lithium sulfur full cells without anode architecture exhibited ultra-high volumetric energy density when the surface of Cu current collector was free of oxide layers. The removal of oxide layer in Cu current collector was simply obtained by heat treatment at high temperature under H2 atmosphere. While Cu current collector with oxide layer, which traps electrons on the surface and interferes with the deposition reaction with Li ions, resulted in heterogeneous deposition of Li metal, oxide-free Cu current collector allowed the uniform deposition of Li metal due to the surface with low nucleation overpotential. The full cell with the oxide-free Cu current collector exhibited high capacity, high rate electrochemical performance. In addition, it allowed extraordinary volumetric energy density and simple assembly because of the absence of an anode material. |
