Creating new nanostructured materials inspired by biomaterials is one of the most fascinating topics owing to their fantastic properties. Herein, we synthesize a new hollow aurilave-like carbon using the natural spores of Lycoperdon Boavista (SLBs) as hard-template, where the heteroatom of nitrogen and oxygen can be in-situ doped simultaneously. The hollow N/O-co-doped carbon (HNOC) has a high specific surface area and is rich in defects, enabling high performances in sodium-ion batteries (SIBs) and supercapacitors (SCs). A high sodium storage capacity of 246 and 107 mAh g−1 with superior stability over 1000 cycles can be achieved at the rates of 0.1 and 2 A g−1, respectively. Besides, the high rate capacity of 260 F g−1 at 5 A g−1 and extraordinary cycling stability over 10,000 cycles are also demonstrated in SCs. The great features of HNOC are further studied versus Na3V2(PO4)3 cathode in a sodium ion full battery, where the excellent stability and span life are both confirmed. We hope this newly-designed carbon material could complement the structure-related properties in electrochemistry, and also the presented synthetic strategy can be widely extended for designing more functional materials with greater capabilities.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work is supported by the National Natural Science Foundation of China (21978281, 21975250, 21703285) and the National Key R&D Program of China (SQ2017YFE9128100). The authors also thank the Independent Research Project of the State Key Laboratory of Rare Earth Resources Utilization (110005R086), Changchun Institute of Applied Chemistry, Chinese Academy of Sciences.