Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou 310018, China; College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China.
Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou 310018, China; College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China.
J Colloid Interface Sci. 2019 Jul 1;547:92-101. doi: 10.1016/j.jcis.2019.03.097. Epub 2019 Mar 29.
Fabrication of high-performance electrodes from waste biomass has attracted increasing attention among the energy storage and conversion field. In this work, we have synthesized nitrogen-doped activated carbon by a simultaneous pyrolysis/activation method from waste bones. It is found that the specific surface area and pore structure of as-synthesized carbon depends on the carbonization temperature (500-800 °C), and the highest specific surface area is 1522 m g. The electrochemical properties of Pork bone, Blackfish bone, Eel bone based activated carbon (PBAC, BFAC, EBAC) mainly depend on their micro-/mesoporosity. Three samples PBAC-600, BFAC-600 and EBAC-600, which have higher ratio of micropore surface area and nitrogen content, exhibit enhanced specific capacitance of 263, 302 and 264F g in 6 M KOH electrolyte. Furthermore, the assembled symmetric supercapacitors of PBAC-600 can deliver energy density as high as 7.0 and 26.2 Wh Kg in the aqueous and ionic liquid electrolyte, respectively. Such excellent performance can be attributed to the microporous structure, reasonable pore size distribution and nitrogen self-doping of the activated carbon. This research indicates that waste bones have great potential for mass fabrication of the activated carbon electrodes for energy storage applications.
从废生物质中制造高性能电极在储能和转换领域引起了越来越多的关注。在这项工作中，我们通过同时的热解/活化法从废骨中合成了氮掺杂活性炭。结果发现，所合成碳的比表面积和孔结构取决于碳化温度（500-800°C），最高比表面积为 1522m²/g。基于猪肉骨、黑鱼骨、鳗鱼骨的活性炭（PBAC、BFAC、EBAC）的电化学性能主要取决于其微孔/介孔。三个样品 PBAC-600、BFAC-600 和 EBAC-600 具有更高的微孔表面积和氮含量比，在 6M KOH 电解液中表现出增强的比电容，分别为 263、302 和 264F/g。此外，PBAC-600 的组装对称超级电容器在水性和离子液体电解质中分别可提供高达 7.0 和 26.2Wh/kg 的能量密度。这种优异的性能可归因于活性炭的微孔结构、合理的孔径分布和氮自掺杂。这项研究表明，废骨在大规模制造用于储能应用的活性炭电极方面具有巨大的潜力。
