The initial charge and discharge curves of SSBs recorded at 0.1C with cut-off voltage of 4.2 V (vs. Li + /Li) are presented in Fig. . It is evident that for SSB-LIC@NCA the polarization during charge and discharge is effectively suppressed and the discharge capacity is significantly increased (from 71.8 mAh/g for SSB-NCA to 148.3 mAh/g for SSB-LIC@NCA). Moreover, SSB-LIC@NCA shows significantly more stable long-term cycling at around 133.6 mAh/g and 80.1% capacity retention at 0.2 C compared to SSB-NCA with around 40 mAh/g for 200 cycles (Fig. ).