<br>嵌段共聚物直接简便合成 N 掺杂介孔石墨碳，用于可靠的高性能锌离子混合超级电容器,ACS Applied Materials & Interfaces

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嵌段共聚物直接简便合成 N 掺杂介孔石墨碳，用于可靠的高性能锌离子混合超级电容器
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-04-11 , DOI: 10.1021/acsami.3c02791
Keon-Woo Kim _{1,

2} , Bomi Park _{1,

2} , Jun Kim _{1,

2} , Hyunho Seok ₃ , Taesung Kim _{3,

4} , Changshin Jo _{2,

5} , Jin Kon Kim _{1,

2}

Affiliation

有序介孔碳（OMC）由于其高表面积和互连的多孔结构而成为锌离子混合电容器（Zn HC）阴极材料的有前途的材料。框架的石墨化和氮掺杂已被用来通过增强电导率、赝电容反应位点和对水性电解质的表面亲和力来提高OMC的储能性能。因此，当两种方法同时应用于 OMC 时，Zn HC 的储能性能将得到改善。在此，我们介绍了一种利用聚苯乙烯-嵌段-聚(2-乙烯基吡啶)共聚物(PS- b -P2VP)作为软模板和碳/氮源来简便合成N掺杂介孔石墨碳(N-mgc)的方法。 PS- b- P2VP 与用于石墨化的 Ni 前体共组装形成介观结构复合材料，通过催化热解将其转化为氮掺杂石墨碳。选择性去除Ni后，制备N-mgc。所得N-mgc表现出具有高氮含量和高表面积的互连介孔结构。当N-mgc用作Zn离子HC中的阴极材料时，实现了优异的储能性能：高比电容（0.2 A/g时为43 F/g），19.4 Wh/kg的高能量密度密度为180 W/kg，循环稳定性可靠（>3000次循环）。

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Block Copolymer-Directed Facile Synthesis of N-Doped Mesoporous Graphitic Carbon for Reliable, High-Performance Zn Ion Hybrid Supercapacitor

Ordered mesoporous carbons (OMCs) are promising materials for cathode materials of a Zn ion hybrid capacitor (Zn HC) due to their high surface area and interconnected porous structure. Graphitization of the framework and nitrogen doping have been used to improve the energy storage performance of the OMCs by enhancing electrical conductivity, pseudocapacitive reaction sites, and surface affinity toward aqueous electrolytes. Thus, when both methods are simultaneously implemented to the OMCs, the Zn HC would have improved energy storage performance. Herein, we introduce a facile synthetic method for N-doped mesoporous graphitic carbon (N-mgc) by utilizing polystyrene-block-poly(2-vinlypyridine) copolymer (PS-b-P2VP) as both soft-template and carbon/nitrogen sources. Co-assembly of PS-b-P2VP with Ni precursors for graphitization formed a mesostructured composite, which was converted to N-doped graphitic carbon through catalytic pyrolysis. After selective removal of Ni, N-mgc was prepared. The obtained N-mgc exhibited interconnected mesoporous structure with high nitrogen content and high surface area. When N-mgc was employed as a cathode material in Zn ion HC, excellent energy storage performance was achieved: a high specific capacitance (43 F/g at 0.2 A/g), a high energy density of 19.4 Wh/kg at a power density of 180 W/kg, and reliable cycle stability (>3000 cycles).

更新日期：2023-04-11

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