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首页> 外文期刊>Advanced Functional Materials >Cross-Coupled Macro-Mesoporous Carbon Network toward Record High Energy-Power Density Supercapacitor at 4 V
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Cross-Coupled Macro-Mesoporous Carbon Network toward Record High Energy-Power Density Supercapacitor at 4 V

机译：交叉耦合的宏观介孔碳网络朝着创纪录的4 V高能量-功率密度超级电容器发展

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摘要

Ionic liquids (ILs) electrolyte hold tremendous potentials to develop high-energy-density electric double layer capacitor due to their wide voltage windows, but are severely plagued by the sluggish mass diffusion from high viscosity and large ion size, particularly over micropore-dominated carbon electrodes. Exploiting the carbon electrode possessing high compatibility with ILs electrolyte remains a great challenge. Herein, an emerging 3D cross-coupled macro-mesoporous carbon network with ultrahigh specific surface area (SSA, 2872.2 m(2) g(-1)), N-self doping, small-sized mesopores (2-4 nm) and macropores (50-150 nm) is designed via a facile, versatile, and ecofriendly salt-template strategy from the NaNO3-gelatin biopolymer aerogel, which shows great adaptability toward high energy power density used in 4 V EMIBF4 ILs (92 Wh kg(-1) is achieved at 1 kW kg(-1), and notably a record high energy density of 39 Wh kg(-1) is retained even at an ultrahigh power density of 200 kW kg(-1)). The large energy density is ascribed to the plentiful ion-available mesoporous active sites (S-meso/SSA = 86.6%, V-meso/V-total = 92.1%), while the extraordinary power density is attributed to the synergistic effects from the suitable macro-mesoporous ion-diffusion channels, continuous conductive network, low oxygen content (2.24%) as well as good affinity to ILs.
机译：离子液体（ILs）电解质具有宽电压范围，因此具有开发高能量密度双电层电容器的巨大潜力，但由于高粘度和大离子尺寸（尤其是在微孔占主导的碳之上）的质量扩散缓慢而受到严重困扰电极。开发与ILs电解质具有高度相容性的碳电极仍然是一个巨大的挑战。本文中，具有超高比表面积（SSA，2872.2 m（2）g（-1）），N型自掺杂，小尺寸中孔（2-4 nm）和大孔的新兴3D交叉耦合宏中孔碳网络（50-150 nm）是通过NaNO3-明胶生物聚合物气凝胶通过一种灵活，多功能且生态友好的盐模板策略设计的，该策略显示出对4 V EMIBF4 IL（92 Wh kg（-1 ）是在1 kW kg（-1）的情况下实现的，即使在200 kW kg（-1）的超高功率密度下，仍可保持39 Wh kg（-1）的创纪录高能量密度。较大的能量密度归因于大量的离子可用介孔活性位点（S-meso / SSA = 86.6％，V-meso / V-total = 92.1％），而非凡的功率密度则归因于离子对的协同作用。合适的大介孔离子扩散通道，连续的导电网络，低氧含量（2.24％）以及对IL的良好亲和力。

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