Reed straw derived active carbon/graphene hybrids as sustainable high-performance electrodes for advanced supercapacitors
Reed straw derived active carbon/graphene hybrids as sustainable high-performance electrodes for advanced supercapacitors
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DOI：
10.1007/s10008-015-3061-y
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发表时间：
2016-02
影响因子：
2.5
通讯作者：
Qinxing Xie;Anran Zheng;Sibo Zhai;Shihua Wu;Chao Xie;Yufeng Zhang;Yunfei Guan
中科院分区：
文献类型：
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作者：
Qinxing Xie;Anran Zheng;Sibo Zhai;Shihua Wu;Chao Xie;Yufeng Zhang;Yunfei Guan
以芦秆和氧化石墨烯(GO)为原料，以氯化锌为活化剂，采用一步炭化/活化工艺制备了芦秆衍生活性碳/石墨烯(AC@GR)杂化材料。所制备的杂化材料具有1971年至2497m2g−1的高比表面积，丰富的孔隙率，以及良好的储能能力。使用在700C获得的混合体作为电极的对称型C/C超级电容器显示出优异的循环耐久性，在2A/g−1下循环6000次后保持约90%，在高达4660W/kg−1的功率密度下的高能量密度为6.12WH/kg−1 in 6 0M KOH水电解液。这种优异的电容性能归功于AC和GR的协同作用。
Reed straw-derived active carbon@graphene (AC@GR) hybrids were prepared by one-step carbonization/activation process using a mixture of reed straw and graphene oxide (GO) as raw materials and ZnCl2as activation agent. The as-prepared hybrids exhibit high specific surface area in a range of 1971–2497 m2g−1, abundant porosity, as well as excellent energy storage capability. The symmetric C//C supercapacitor using the hybrid obtained at 700 °C as electrodes demonstrates superior cycling durability, ca. 90 % retention after 6000 cycles at 2 A g−1, and a high energy density of 6.12 Wh kg−1at a power density of up to 4660 W kg−1in 6 M KOH aqueous electrolyte. The excellent capacitive performance is attributed to the synergistic effect of AC and GR.