Qu Xiaoxiao, Kang Weiwei, Lai Changwei, Zhang Chuanxiang, Hong Suck Won
Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 46241, Korea.
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Molecules. 2022 Jan 25;27(3):791. doi: 10.3390/molecules27030791.
High-performance porous carbons derived from tea waste were prepared by hydrothermal treatment, combined together with KOH activation. The heat-treatment-processed materials possess an abundant hierarchical structure, with a large specific surface of 2235 m g and wetting-complemental hydrophilicity for electrolytes. In a two-electrode system, the porous carbon electrodes' built-in supercapacitor exhibited a high specific capacitance of 256 F g at 0.05 A g, an excellent capacitance retention of 95.4% after 10,000 cycles, and a low leakage current of 0.014 mA. In our work, the collective results present that the precursor crafted from the tea waste can be a promising strategy to prepare valuable electrodes for high-performance supercapacitors, which offers a practical strategy to recycle biowastes into manufactured materials in energy storage applications.
通过水热处理并结合氢氧化钾活化制备了源自茶渣的高性能多孔碳。经过热处理的材料具有丰富的分级结构，比表面积大，为2235 m²/g，对电解质具有润湿性互补的亲水性。在两电极体系中，多孔碳电极内置的超级电容器在0.05 A/g电流密度下表现出256 F/g的高比电容，在10000次循环后具有95.4%的优异电容保持率，漏电流为0.014 mA。在我们的工作中，这些综合结果表明，由茶渣制成的前驱体可能是制备高性能超级电容器有价值电极的一种有前景的策略，这为在储能应用中将生物废料回收制成材料提供了一种切实可行的策略。
