| 摘要： |
Nitrogen doping is one of the resultful means to modify electrode materials to get improved storage capacity. However, scientific problem of the effect of single pyridine-N on capacity has not yet been discovered. This paper developed a new way for precise preparation of pyridinic-N doped carbon materials. Different N/C ratios of graphdiyne were obtained by accurate adjustment and superior lithium and sodium storage capacities were realized. At 0.05 A g(-1), for Li and Na ions batteries with the as prepared samples as electrodes, the maximum specific capacities could reach up to 1812 and 680 mAh g(-1), respectively. Relationship between specific capacity and nitrogen content was not positively correlated and the maximum value occurs when monomers ratio was 1:1, suggested that besides N/C ratios, morphologies, interlayer spacing, and wettability also take effect on the behavior of battery performances. This investigation makes a new insight and provides guidance to heteroatom doping in energy storage. |
