writer：Walid Alkarmo, Farid Ouhib, Abdelhafid Aqil, Jean-Michel Thomassin, Jiayin Yuan*, Jiang Gong, etc.
keywords：Poly(ionic liquid)
source：期刊
Issue time：2019年
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 N‐doped porous 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 are first prepared and then decorated by a thin PIL coating before carbonization. The resulting NPCs reach a satisfactory specific surface area of up to 561 m2 g?1 and a hierarchically meso‐ and macroporous structure while keeping a nitrogen content of 2.6 wt%. Such NPCs deliver a high reversible charge/discharge capacity of 1013 mA h g?1 over 200 cycles at 0.4 A g?1 for lithium‐ion batteries, and show a good capacity of 204 mA h g?1 over 100 cycles at 0.1 A g?1 for sodium‐ion batteries.