| 초록 |
Transition metal oxides with high theoretical capacities possess attractive potential as anode materials of lithium ion batteries (LIBs). Among them, zinc oxide (ZnO) has several prominent advantages, such as high theoretical capacity of 987mAhg−1, excellent lithium ion diffusion coefficients, low cost, natural abundance, and nontoxicity. Despite these competitive features, however, the progress of ZnO electrode is rather sluggish due to serious capacity fading and limited rate performance, resulting from the poor electronic conductivity and the pulverization caused by large volume expansion during cycling. Here, we introduce rationally designed MOF-derived hollow star-like ZnO/N-doped carbon nanocage interconnected by CNTs. The designed nanocomposite integrates the high theoretical capacity of ZnO and excellent conductivity as well as the excellent mechanical stability of CNTs. The as-obtained unique 3D nanostructure delivers superior battery performance. |
