Gouda Abdelaziz, Masson Alexandre, Hoseinizadeh Molood, Soavi Francesca, Santato Clara
Department of Engineering Physics, Polytechnique Montreal, C.P. 6079, Succ. Centre-ville, Montreal, Quebec, H3C 3A7, Canada.
Now at, Solar Fuels Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada.
Commun Chem. 2022 Aug 20;5(1):98. doi: 10.1038/s42004-022-00719-y.
Biosourced and biodegradable organic electrode materials respond to the need for sustainable storage of renewable energy. Here, we report on electrochemical capacitors based on electrodes made up of quinones, such as Sepia melanin and catechin/tannic acid (Ctn/TA), solution-deposited on carbon paper engineered to create high-performance interfaces. Sepia melanin and Ctn/TA on TCP electrodes exhibit a capacitance as high as 1355 mF cm (452 F g) and 898 mF cm (300 F g), respectively. Sepia melanin and Ctn/TA symmetric electrochemical capacitors operating in aqueous electrolytes exhibit up to 100% capacitance retention and 100% coulombic efficiency over 50,000 and 10,000 cycles at 150 mA cm (10 A g), respectively. Maximum power densities as high as 1274 mW cm (46 kW kg) and 727 mW cm (26 kW kg) with maximum energy densities of 0.56 mWh cm (20 Wh kg) and 0.65 mWh cm (23 Wh kg) are obtained for Sepia melanin and Ctn/TA.
生物源和可生物降解的有机电极材料满足了可再生能源可持续存储的需求。在此，我们报道了基于醌类物质制成的电极的电化学电容器，例如乌贼墨黑色素和儿茶素/单宁酸（Ctn/TA），它们通过溶液沉积在经过特殊设计以创建高性能界面的碳纸上。乌贼墨黑色素和TCP电极上的Ctn/TA分别表现出高达1355 mF/cm²（452 F/g）和898 mF/cm²（300 F/g）的电容。在水性电解质中运行的乌贼墨黑色素和Ctn/TA对称电化学电容器，在150 mA/cm²（10 A/g）的电流密度下，分别经过50,000次和10,000次循环后，电容保持率高达100%，库仑效率达100%。乌贼墨黑色素和Ctn/TA的最大功率密度分别高达1274 mW/cm²（46 kW/kg）和727 mW/cm²（26 kW/kg），最大能量密度分别为0.56 mWh/cm²（20 Wh/kg）和0.65 mWh/cm²（23 Wh/kg）。
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