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arXiv · 1904.01105

Poly(ionic liquid)-derived N-doped carbons with hierarchical porosity for lithium and sodium ion batteries

Walid Alkarmo·Farid Ouhib·Abdelhafid Aqil·Jean-Michel Thomassin·Jiayin Yuan·Jiang Gong·Bénédicte Vertruyen·Christophe Detrembleur·Christine Jérôme
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Abstract

The performance of lithium and sodium ion batteries relies notably on the accessibility to carbon electrodes of controllable porous structure and chemical composition. This work reports a facile synthesis of well-defined porous N-doped carbons (NPCs) using a poly(ionic liquid) (PIL) as precursor, and graphene oxide (GO)-stabilized poly(methyl methacrylate) (PMMA) nanoparticles as sacrificial template. The GO-stabilized PMMA nanoparticles were first prepared and then decorated by a thin PIL coating before carbonization. The resulting NPCs reached a satisfactory specific surface area of up to 561 m2/g and a hierarchically meso- and macroporous structure while keeping a nitrogen content of 2.6 wt %. Such NPCs delivered a high reversible charge/discharge capacity of 1013 mA h/g over 200 cycles at 0.4 A/g for lithium ion batteries (LIBs), and showed a good capacity of 204 mA h/g over 100 cycles at 0.1 A/g for sodium ion batteries (SIBs).

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Walid Alkarmo, Farid Ouhib, Abdelhafid Aqil, Jean-Michel Thomassin, Jiayin Yuan, Jiang Gong, Bénédicte Vertruyen, Christophe Detrembleur, Christine Jérôme. 2019-01-17. Poly(ionic liquid)-derived N-doped carbons with hierarchical porosity for lithium and sodium ion batteries. https://doi.org/10.1002/marc.201800545

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