Dual‐Functional Templated Methodology for the Synthesis of Hierarchical Porous Carbon for Supercapacitor,ChemistrySelect

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Dual‐Functional Templated Methodology for the Synthesis of Hierarchical Porous Carbon for Supercapacitor
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-01-11 , DOI: 10.1002/slct.201702496
Feng Shen ₁ , Mo Qiu ₁ , Yinhan Hua ₂ , Xinhua Qi ₁

Affiliation

Dual‐functional templated methodology was developed for synthesis of hierarchical porous carbons via direct thermal decomposition of agricultural wastes, in which dairy manure acted as low cost carbon precursor and eggshell as both hard template and activating agent source of CO₂. The dual‐functional template can be easily removed by diluted HCl instead of corrosive HF. Carbonization temperature and dosage of eggshell have great influence on the porous texture of the carbon materials. Optimized temperature of 800 ^oC and mass ratio of eggshell/dairy manure (2:1) facilitate the releasing of CO₂ from eggshell thus benefitting the formation of hierarchical porous carbon. The porous carbon has maximum surface area of 543.6 m²/g and total pore volume of 0.48 cm³/g of which micropores account for 40%. As the electrode of supercapacitor, the obtained hierarchical porous carbons showed a relative high specific capacitance of 226.6 F/g in KOH aqueous electrolyte (6 mol/L). Besides, it exhibited outstanding cycling stability with almost 100% of specific capacitance retention after 2500 GCD cycles. The one‐step template carbonization method provides a facile and sustainable route to prepare hierarchical porous carbons from the agricultural wastes.

中文翻译：

用于超级电容器的多级多孔碳合成的双功能模板化方法学

开发了双功能模板化方法，用于通过农业废弃物的直接热分解来合成分层多孔碳，其中乳牛粪充当低成本的碳前体，蛋壳充当硬模板和CO _2的活化剂来源。使用稀释的HCl（而不是腐蚀性HF）可以轻松除去双功能模板。碳化温度和蛋壳的添加量对碳材料的多孔质地有很大的影响。优化的800 ^o C温度和蛋壳/乳牛粪的质量比（2：1）有助于从蛋壳释放CO ₂，从而有利于分层多孔碳的形成。多孔碳的最大表面积为543.6 m ²/ g，总孔体积为0.48 cm ³ / g，其中微孔占40％。作为超级电容器的电极，所得的多孔碳在KOH水性电解质（6 mol / L）中显示出226.6 F / g的相对较高的比电容。此外，它在2500 GCD循环后表现出出色的循环稳定性，比电容保持率几乎为100％。一步模板碳化方法为从农业废料制备分级多孔碳提供了一种简便而可持续的途径。

更新日期：2018-01-11

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