当前位置: X-MOL 学术Mater. Res. Bull. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Cobalt-oxide/carbon composites for asymmetric solid-state supercapacitors
Materials Research Bulletin ( IF 5.4 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.materresbull.2020.110974
Muhammad Zahir Iqbal , Syed Shabhi Haider , Sana Zakar , Meshal Alzaid , Amir Muhammad Afzal , Sikandar Aftab

Abstract A facile methodology has been adopted for the synthesis of cobalt oxide (Co3O4) by wet chemical technique followed by the calcination and prepared Co3O4/C composite for energy storage devices. Initially, SEM and XRD are carried out to analyze the surface characterizations of electrode material. The electrochemical properties of synthesized material has been investigated and the maximum specific capacitance of 567 F/g is achieved for Co3O4/C composite at 3 mV/s scan rate. Co3O4/C composite and activated carbon (AC) are sandwiching and separated with PVA-KOH-C gel electrolyte. The device has been examined at several scan rates and current densities demonstrating better performance with maximum energy density of 63 Wh/kg at 0.7 A/g. The capacitive retentivity is 82 % after 6000 charge/discharge cycles. The solid-state devices are showing a tremendous performance with high energy and power density and are safe to handle due to no seepage which can be utilized for the next generation.

中文翻译:

用于不对称固态超级电容器的氧化钴/碳复合材料

摘要 采用一种简便的方法通过湿化学法合成氧化钴 (Co3O4),然后煅烧,并制备出用于储能装置的 Co3O4/C 复合材料。首先,进行SEM和XRD分析电极材料的表面特征。研究了合成材料的电化学性能,在 3 mV/s 扫描速率下,Co3O4/C 复合材料的最大比电容为 567 F/g。Co3O4/C 复合材料和活性炭 (AC) 被 PVA-KOH-C 凝胶电解质夹在中间并分离。该器件已在多种扫描速率和电流密度下进行了检查,证明了在 0.7 A/g 时具有 63 Wh/kg 的最大能量密度的更好性能。6000 次充电/放电循环后,电容保持率为 82%。
更新日期:2020-11-01
down
wechat
bug