Abstract The growth of mesoporous graphene fibers (MGFs) is achieved by the fluidized-bed chemical vapor deposition methodology using MgCO3·3H2O fibers as templates. The regeneration of templates is realized via adding carbonate ions into the pickling filtrate. Besides, regenerated template and graphene possess similar morphologies and comparable qualities with those of initial template and graphene. MGFs present three-dimensional fiber-like microarchitecture coupled with mesoporous structure, strong structural stability and high electrical conductivity (800 S m−1). The symmetric supercapacitor (SSC) constructed by MGFs in aqueous electrolyte system exhibits enhanced capacitive behaviors with respect to the capacitance and rate capability as compared to those of lamellar-like mesoporous graphene and commercial activated carbon. Only 9.2% attenuation ratio of gravimetric capacitance is observed for MGFs-based SSC even when the areal mass loading increases from 2 to 10 mg cm−2. The electrochemical energy-storage behavior of MGFs in the organic electrolyte (LiPF6 system) is also investigated. This work provides an effective strategy to produce the exceptional graphene-based electrode material in a large scale.

中文翻译：

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在流化床化学气相沉积过程中制备具有优异电容行为的介孔石墨烯纤维过程中模板的循环再生

摘要 以MgCO3·3H2O纤维为模板，采用流化床化学气相沉积法制备介孔石墨烯纤维（MGFs）。模板的再生是通过在酸洗滤液中加入碳酸根离子来实现的。此外，再生模板和石墨烯与初始模板和石墨烯具有相似的形态和可比的质量。MGFs 呈现三维纤维状微结构，并具有介孔结构、强结构稳定性和高电导率（800 S m-1）。与层状介孔石墨烯和商用活性炭相比，由 MGF 在水性电解质体系中构建的对称超级电容器 (SSC) 在电容和倍率性能方面表现出增强的电容行为。只有 9。即使当面质量负载从 2 mg cm-2 增加到 10 mg cm-2 时，基于 MGFs 的 SSC 也观察到了 2% 的重力电容衰减率。还研究了 MGFs 在有机电解质（LiPF6 系统）中的电化学储能行为。这项工作为大规模生产特殊的石墨烯基电极材料提供了一种有效的策略。