论文标题
将原位合成的结构调整为几层石墨烯/碳复合材料，以垂直垂直排列的石墨烯电极具有较高的体积电容
Tuning the structure of in-situ synthesized few layer graphene/carbon composites into nanoporous vertically aligned graphene electrodes with high volumetric capacitance
论文作者
论文摘要
很少有层石墨烯/碳（FLG/C）复合材料直接通过在水中的碳基天然前体（即蛋白质，多糖）的情况下直接对膨胀石墨的快速而简单的去角质制备，然后进行碳化过程。 Several parameters such as nature of C-precursor, FLG/C ratio and carbonization conditions (gas, temperature) are modified in order to optimize the morphology, composition and porosity of FLG/C and thereby investigate their impact on gravimetric and volumetric capacitance, their stability and contribution of pseudocapacitance (Ps) vs. double-layer capacitance (DL).考虑到其低赌注表面面积为130-260 m2/g，很少有复合材料表现出极高的电容。 322 f/g和467 f/cm3的最高重量和体积电容（0.5 a/g）； FLG/C：1/2的能量/功率性能是从石墨 - - 牛血清白蛋白（BSA）合成的。尽管相对较高的理论伪电容贡献为69％（1.1V），但该样本还显示出高电流密度和能量到功率密度升高的高容量保留率。总体能力性能归因于组合结构特征的高电化学表面积：纳米质量，FLG对准具有FLG边缘高的可及性和较高的填料密度。
Few layer graphene/carbon (FLG/C) composites are prepared directly via the rapid and simple exfoliation of expanded graphite in the presence of carbon based natural precursors (i.e. protein, polysaccharide) in water, followed by carbonization process. Several parameters such as nature of C-precursor, FLG/C ratio and carbonization conditions (gas, temperature) are modified in order to optimize the morphology, composition and porosity of FLG/C and thereby investigate their impact on gravimetric and volumetric capacitance, their stability and contribution of pseudocapacitance (Ps) vs. double-layer capacitance (DL). Few composites exhibit extremely high capacitance considering their low BET-surface area ranging in 130-260 m2/g. The highest gravimetric and volumetric capacitance of 322 F/g and 467 F/cm3 respectively (0.5 A/g); and energy/power performance is reached for FLG/C:1/2, synthesized from graphite-bovine serum albumin(BSA). Despite relatively high theoretical pseudocapacitance contribution of 69% (1.1V), this sample shows also high capacity retention at high current density and elevated energy-to-power densities. The overall great capacity performance is attributed to the high electrochemical surface area from combined structural features: nanoporosity, FLG alignment with high accessibility of FLG edges and elevated packing density.
