LiCoO_2/Li_(6.75)La_3Zr_(1.75)Nb_(0.25)O_(12) interface modification enables all-solid-state battery

摘要

All-solid-state batteries with garnet-type solid electrolytes are expected to achieve high safety. However, poor contact between the cathode and the solid-state electrolyte remains a bottleneck in improving electrochemical performance. We propose an interface modification strategy by adopting nano gamma-Al2O3 as a co-sintering additive to address the interfacial issue. The Li vertical bar/Li6.75La3Zr1.75Nb0.25O12 vertical bar LiCoO2 all-solid-state battery exhibits promoted capacities due to intimate interfacial contact between the cathode and the electrolyte after modification. This work provides a low-cost and convenient strategy to overcome the interfacial issue in all-solid-state batteries.