| 초록 |
We demonstrate that different carbon local orderings lead to substantially diverse electrochemical properties within morphologically identical carbon materials. To decouple the effects of local structure and morphology, nanocarbons with different carbon orderings were fabricated using natural polymers via controlled pyrolysis. Through this process, various pyropolymer-based nanocarbons with varying degrees of carbon ordering were obtained with maintaining their intrinsic morphological shape of the nanocarbons. We found that the sodium ion storage mechanism varies from chemi/physisorption, insertion to nanoclustering of metallic states, depending on the carbon structure, which display various potentials and capacities. These results provide insights for further tuning of carbon-based materials for anodes of sodium ion or metal battery and improve understanding of sodium ion or sodium metal storage behaviour in carbonaceous materials. |
