Supermolecule Self-Assembly Promoted Porous N, P Co-Doped Reduced Graphene Oxide for High Energy Density Supercapacitors
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Online Publication Date2019-06-03
Print Publication Date2019-06-24
Embargo End Date2020-06-03
Permanent link to this recordhttp://hdl.handle.net/10754/656257
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AbstractInspired by supermolecular self-assembly strategy, the N, P co-doped reduced graphene oxide (NP-rGO) material is fabricated by heat treatment from the supermolecular system of GO/MP (melamine and phytic acid supramolecular polymer). Herein, MP acts as not only a “sacrifice template” to promote the formation of uniform three-dimensional (3D) porous structure but also a spacer to hinder the graphene sheets from aggregate, as well as a precursor of nitrogen and phosphorus for N, P co-doping. The characterization results indicate that the NP-rGO has 3D porous structure with loose-packed and crumpled transparent thin layer morphology. The electrochemical measurements reveal that compared with the undoped rGO, the NP-rGO exhibits enhanced capacitive properties, including high specific capacitance (416 F g–1) and outstanding rate capability. After 10 000 cycles 94.63% capacitance is maintained, indicating good cycle stability. The NP-rGO is further assembled into symmetric supercapacitors, and the energy density of the NP-rGO is 22.3 Wh kg–1 (at 500 W kg–1). The outstanding supercapacitive properties may be attributed to the pesudocapacitive effect of N, P co-doping in graphene nanosheets as well as exceptional 3D porous structure.
CitationCheng, H., Yi, F., Gao, A., Liang, H., Shu, D., Zhou, X., … Zhu, Z. (2019). Supermolecule Self-Assembly Promoted Porous N, P Co-Doped Reduced Graphene Oxide for High Energy Density Supercapacitors. ACS Applied Energy Materials, 2(6), 4084–4091. doi:10.1021/acsaem.9b00204
SponsorsThe authors acknowledge the following financial supporters of this work: the National Natural Science Foundation of China (Grants 21673086 and 51578556), the Scientific and Technological Plan of Guangdong Province (lithium ion capacitor).
PublisherAmerican Chemical Society (ACS)
JournalACS Applied Energy Materials