▎ 摘　　要

A graphene surface coating strategy (G@LATP), to modify and improve the interfacial characteristics between the Lithium Aluminum Titanium Phosphate (LATP) electrolyte and different anodes, such as Li metal and Si film has been proposed. As a result, the Li/Li symmetric cell with graphene coating modified LATP electrolyte exhibits excellent cyclic stability, even at large current densities of 0.5 mA.cm(-2) and 1 mA.cm(-2). The modified Li/ G@LATP/LiFePO4 solid-state full cell is delivering a discharge specific capacity of 136 mAh.g(-1) after 200 cycles at a current density of 0.1 mA.cm(-2), corresponding to a capacity retention of 86.1%. The graphene coating technique also led to improved cyclic stability in the Si/Si symmetric cell with modified LATP electrolyte at current densities of 0.1 mA.cm(-2) and 0.3 mA.cm(-2), with polarization voltages of 0.063 V and 0.27 V after cycling for 1000 h, respectively. Moreover, the Si/G@LATP/LiFePO4 full cell shows an outstanding discharge specific capacity of 161 mAh.g(-1) at its 2nd cycle, with a capacity retention of 92.9% after 200 cycles. These results show that graphene coating of the LATP electrolyte is a facile and effective method to improve the interfacial characteristics of Li/LATP and Si/LATP.