期刊
ADVANCED ENERGY MATERIALS
卷 5, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201500559
关键词
Li-ion batteries; nitrogen doping; porous graphenes; supramolecular polymers
类别
资金
- Singapore National Research Foundation under NRF RF [NRFRF2010-07]
- A*Star SERC PSF [1321202101]
- MOE Tier 2 [MOE2012-T2-2-049]
- Natural Science Foundation of Jiangsu Province [BM2012010]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [YX03001]
- Ministry of Education of China [IRT1148]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- National Natural Science Foundation of China [61136003, 51173081]
- Singapore MOE under AcRF Tier 2 [ARC 26/13, MOE2013-T2-1-034]
- AcRF Tier 1 [RG 61/12]
- Start-Up Grant in NTU [M4080865.070.706022]
A novel strategy of utilizing supramolecular polymerization for fabricating nitrogen doped porous graphene (NPG) with high doping level of 12 atom% as the anode material for lithium ion batteries is reported for the first time. The introduction of supramolecular polymer (melamine cyanurate) functions not only as a spacer to prevent the restacking of graphene sheets but also as a sacrificial template to generate porous structures, as well as a nitrogen source to induce in situ N doping. Therefore, pores and loose-packed graphene thin layers with high N doping level are very effectively formed in NPG after the annealing process. Such highly desired structures immediately offer remarkably improved Li storage performance including high reversible capacity (900 mAh g(-1) after 150 cycles) with good cycling and rate performances. The effects of annealing temperature and heating rates on the final electrochemical performance of NPG are also investigated. Furthermore, the low cost, facile, and scalable features of this novel strategy may be helpful for the rational design of functionalized graphene-based materials for diverse applications.
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