The conversion of biowaste to activated carbon (AC) for supercapacitor applications is recently gaining attention due to its extraordinary high specific surface area (SSA), hierarchical pore size distribution, and very good conductivity. Therefore, in this work, we have utilized waste office papers as a precursor to synthesize highly porous carbon to be used as an electrode material for supercapacitors. The sub-nanometre pores in as-synthesized office paper waste-derived activated carbon (OPDAC) material, facilitate easy flow of ions and surprisingly increase the specific capacitance up to 237 F/g at a current density of 1 A/g. Moreover, an all-solid-state symmetric supercapacitor using OPDAC electrodes delivers an ultrahigh energy density of 31 Wh/kg at a power density of 380 W/kg along with a long cycle life of 95% after 3000 charge-discharge cycles. Hence, these remarkable results pave the path for the usage of different biowastes for varying energy storage applications.

中文翻译：

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废办公纸作为纤维素材料储层，衍生出用于固态电化学电容器的高孔隙活性炭


将生物废物转化为用于超级电容器应用的活性炭（AC）最近因其极高的比表面积（SSA）、分级孔径分布和非常好的导电性而受到关注。因此，在这项工作中，我们利用废办公纸作为前体来合成高多孔碳，用作超级电容器的电极材料。合成的办公用纸废物衍生活性炭 (OPDAC) 材料中的亚纳米孔有利于离子的轻松流动，并令人惊讶地在 1 A/g 的电流密度下将比电容提高至 237 F/g。此外，采用OPDAC电极的全固态对称超级电容器在380 W/kg的功率密度下可提供31 Wh/kg的超高能量密度，并且在3000次充放电循环后具有95%的长循环寿命。因此，这些显着的结果为不同的生物废物用于不同的能源存储应用铺平了道路。