Poly(ionic liquid)‐Derived N‐Doped Carbons with Hierarchical Porosity for Lithium‐ and Sodium‐Ion Batteries,Macromolecular Rapid Communications

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Poly(ionic liquid)‐Derived N‐Doped Carbons with Hierarchical Porosity for Lithium‐ and Sodium‐Ion Batteries
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-10-03 , DOI: 10.1002/marc.201800545
Walid Alkarmo ₁ , Farid Ouhib ₁ , Abdelhafid Aqil ₁ , Jean-Michel Thomassin ₁ , Jiayin Yuan ₂ , Jiang Gong ₃ , Bénédicte Vertruyen ₄ , Christophe Detrembleur ₁ , Christine Jérôme ₁

Affiliation

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.

中文翻译：

锂和钠离子电池的具有多层孔隙率的聚离子液体衍生的N掺杂碳

锂离子电池和钠离子电池的性能主要取决于可控的多孔结构和化学成分对碳电极的可及性。这项工作报告了使用聚离子液体（PIL）作为前体和氧化石墨（GO）稳定化的聚甲基丙烯酸甲酯（PMMA）纳米颗粒作为牺牲品的定义明确的N掺杂多孔碳（NPC）的简便合成方法模板。首先制备GO稳定的PMMA纳米颗粒，然后在碳化之前用薄的PIL涂层装饰。所得的NPC达到令人满意的比表面积，最高达561 m ² g ^-1，并具有分级的介孔和大孔结构，同时氮含量保持在2.6 wt％。这种NPC可提供1013 mA hg的高可逆充电/放电容量对于锂离子电池，在0.4 A g ^-1下200个循环中的^-1以上，而对于钠离子电池，在0.1 A g ^-1下100个循环中显示出204 mA hg ^-1的良好容量。

更新日期：2018-10-03

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