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Green Carbon Nanofiber Networks for Advanced Energy Storage
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-02 00:00:00 , DOI: 10.1021/acsaem.0c00065
Jiayuan Wei 1 , Shiyu Geng 1 , Olli Pitkänen 2 , Topias Järvinen 2 , Krisztian Kordas 2 , Kristiina Oksman 1, 3, 4
Affiliation  

Energy storage devices such as supercapacitors of high performance are in great need due to the continuous expansion of digitalization and related devices for mobile electronics, autonomous sensors, and vehicles of different kinds. However, the nonrenewable resources and often complex preparation processes associated with electrode materials and structures pose limited scale-up in production and difficulties in versatile utilization of the devices. Here, free-standing and flexible carbon nanofiber networks derived from renewable and abundant bioresources are demonstrated. By a simple optimization of carbonization, the carbon nanofiber networks reach a large surface area of 1670 m2 g–1 and excellent specific gravimetric capacitance of ∼240 F g–1, outperforming many other nanostructured carbon, activated carbon, and even those decorated with metal oxides. The remarkable electrochemical performance and flexibility of the green carbon networks enable an all-solid-state supercapacitor device, which displays a device capacitance of 60.4 F g–1 with a corresponding gravimetric energy density of 8.4 Wh kg–1 while maintaining good mechanical properties.

中文翻译:

用于高级能量存储的绿色碳纳米纤维网络

由于数字化以及用于移动电子,自主传感器和各种车辆的相关设备的不断扩展,迫切需要诸如高性能超级电容器之类的能量存储设备。然而,不可再生资源以及与电极材料和结构相关的通常复杂的制备过程在生产中限制了规模,并且在装置的通用利用方面存在困难。在这里,展示了源自可再生和丰富生物资源的独立式和灵活的碳纳米纤维网络。通过简单的碳化优化,碳纳米纤维网络可达到1670 m 2 g –1的大表面积,并具有约240 F g –1的出色的比重电容。,其性能优于许多其他纳米结构碳,活性炭,甚至装饰有金属氧化物的纳米碳。绿色碳网络出色的电化学性能和灵活性使它成为全固态超级电容器设备,该设备显示出60.4 F g –1的设备电容,相应的重量能量密度为8.4 Wh kg –1,同时保持了良好的机械性能。
更新日期:2020-04-02
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