| 초록 |
In this study, we propose a hierarchically nanoporous 3D assembly (HNA) composed of functionalized onion-like graphitic carbon building blocks, several nanometers in diameter, as a catalytic scaffold for Li-metal storage. The HNA-based electrodes can lead to a high Li ion concentration in the nanoporous structure by ion-exchange mechanism, showing a high CE of ~99.1%, high rate capability of 12 mA cm−2, and a stable cycling behavior of more than 750 cycles. In addition, anode minimized LMBs were achieved using the HNA that has limited Li content (~0.13 mg cm−2), corresponding to 6.5% of the cathode material (commercial NCM622 (~2 mg cm−2)). The LMBs demonstrated a feasible electrochemical performance with high energy and power densities of ~510 W h kgelectrode−1 and ~2760 W kgelectrode−1, respectively, for more than 100 cycles. |
