(a) Na||HC半电池在3.3 mol/L NaFSI/TMP电解液和1.0 mol/L NaPF6/EC:DEC(体积比1∶1)电解液中的循环性能和库仑效率(插图为在两种电解液中HC表面SEI膜的结构示意图)[ |
Fig.5 (a) cycling performance and coulombic efficiency of the Na||HC half-cells using 3.3? mol/L NaFSI/TMP electrolyte and 1.0? mol/L NaPF6/EC:DEC (1∶1, by vol.) electrolyte (insets: Schemes of SEI passivation layers produced on a hard carbon surface in the above two electrolytes)[ |