聚离子液体衍生的具有分级孔结构的 N 掺杂碳材料在锂/钠离子电池中的应用。
Poly(ionic liquid)-Derived N-Doped Carbons with Hierarchical Porosity for Lithium- and Sodium-Ion Batteries.
机构信息
Dr. W. Alkarmo, Dr. F. Ouhib, Dr. A. Aqil, Dr. J.-M. Thomassin, Dr. C. Detrembleur, Prof. C. Jérôme, Centre for Education and Research on Macromolecules, CESAM Research Unit, University of Liege, Sart-Tilman B6a, 13allée du 6 août,, B-4000, Liège, Belgium.
Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrheniusvag 16C,, 10691, Stockholm, Sweden.
出版信息
Macromol Rapid Commun. 2019 Jan;40(1):e1800545. doi: 10.1002/marc.201800545. Epub 2018 Oct 3.
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 m g 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 over 200 cycles at 0.4 A g for lithium-ion batteries, and show a good capacity of 204 mA h g over 100 cycles at 0.1 A g for sodium-ion batteries.
锂离子和钠离子电池的性能显著依赖于具有可控多孔结构和化学成分的碳电极的可及性。本工作报道了一种使用聚离子液体（PIL）作为前体和氧化石墨烯（GO）稳定的聚甲基丙烯酸甲酯（PMMA）纳米颗粒作为牺牲模板，简便合成具有明确结构的氮掺杂多孔碳（NPC）的方法。首先制备 GO 稳定的 PMMA 纳米颗粒，然后在碳化前用薄的 PIL 涂层进行修饰。所得 NPC 达到了高达 561 m² g 的令人满意的比表面积和分级介孔和大孔结构，同时保持 2.6wt%的氮含量。这种 NPC 在 0.4 A g 的电流密度下，200 次循环后具有 1013 mA h g 的高可逆充放电容量，在 0.1 A g 的电流密度下，100 次循环后具有 204 mA h g 的良好容量。
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