| 초록 |
During the charging and discharging processes, the metal-based electrode for energy storage system often shows poor intrinsic electrical conductivity and large capacity decay. Here, we demonstrate a high-performance ion energy storage device using novel hierarchically porous carbon derived from renewable, sustainable and accessible biomass by a thermal process. In particular, the Phosphorus doped and steam activated nanoporous carbon demonstrates the cyclic stability of 96.0% over 100 000 cycles in the full cell, achieving a high capacitance of 265.43 F g–1 and rate capability of 75%. It is attributed to the hierarchical interconnected porosity and the redox-active P=O bonds, which are comprehensively investigated by experimental and computational analyses. |
