当前位置: X-MOL 学术Electrochim. Acta › 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.)
3D network of V2O5 for flexible symmetric supercapacitor
Electrochimica Acta ( IF 6.6 ) Pub Date : 2020-01-19 , DOI: 10.1016/j.electacta.2020.135701
Karamjyoti Panigrahi , Promita Howli , Kalyan Kumar Chattopadhyay

The obstacles, faced by flexible lithium-ion batteries (LIB) for its unambiguous synthesis procedure and low power densities for practical applications escalate the position of flexible supercapacitors (SCs) as a new standalone performer in modern energy storage devices. Additionally, some admirable features like supremacy over energy density, cyclic stability and fast response make SCs a vital aspirant among the energy storage devices. Eying on those advantages of SCs, in this work layered oxide V2O5 3D array has been grown on carbon fabric. The prepared electrode exhibits a specific capacitance of 1098 F/g at a scan rate of 5 mV/s in 0.5 M K2SO4 electrolyte at three electrode configurations. Further, a flexible solid-state symmetric supercapacitor (SSSc) has been assembled taking LiCl/PVA gel electrolyte. The fabricated SSSc manifests a maximum energy density of 48.32 Wh/kg at a power density of 0.49 kW/kg. Moreover, the device exhibits 92% capacitance retention at a current density of 15 A/g after 10,000 cyclic performance. Interconnected network morphology with a large number of cavities/pores actually provides swift access of the electrolyte ions which utterly improves the performance of the electrode when it has been used for energy storage purposes.



中文翻译:

V 2 O 5的3D网络,用于柔性对称超级电容器

柔性锂离子电池(LIB)明确的合成程序和低功率密度在实际应用中面临的障碍使柔性超级电容器(SC)在现代储能设备中成为新型独立执行器的地位不断提高。此外,一些令人赞叹的功能(如能量密度至高无上,循环稳定性和快速响应)使SC成为储能设备中至关重要的愿望。利用SC的优势,在这项工作中,在碳纤维上生长了层状氧化物V 2 O 5 3D阵列。所制备的电极在0.5 M K 2 SO 4中以5 mV / s的扫描速率表现出1098 F / g的比电容。电解质在三个电极配置。此外,已经采用LiCl / PVA凝胶电解质组装了柔性固态对称超级电容器(SSSc)。所制造的SSSc在0.49 kW / kg的功率密度下表现出48.32 Wh / kg的最大能量密度。此外,经过10,000次循环性能测试后,该器件在15 A / g的电流密度下仍具有92%的电容保持率。具有大量空腔/孔的互连网络形态实际上提供了电解质离子的快速访问,这在将电极用于能量存储目的时完全改善了电极的性能。

更新日期:2020-01-21
down
wechat
bug