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MnO2 Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-11-27 00:00:00 , DOI: 10.1021/acsaem.9b01650
Xingwei Sun 1, 2 , Tong Xu 1, 2 , Jie Bai 1, 2 , Chunping Li 1, 2
Affiliation  

In this study, MnO2 nanosheets grown on the multichannel carbon nanofibers containing amorphous cobalt oxide ([email protected]2) are prepared via electrospinning technology followed by carbonization and a facile chemical bath deposition process. The as-obtained [email protected]2 shows flexible features, which could serve as freestanding electrodes applied in supercapacitors. As a result, [email protected]2-2.5 exhibits the specific capacitance of 265 F g–1 at 0.5 A g–1, which surpasses those of their individual counterparts (135 and 143 F g–1 at 0.5 A g–1 for [email protected]2 and CoMCNFs, respectively). Moreover, After 10000 cycles, the specific capacitance of [email protected]2-2.5 also maintained 98.7%. Most importantly, the asymmetric supercapacitor (ASC) is assembled with [email protected]2-2.5 and the electrospinning carbon nanofibers (CNFs), which exhibit a high E of 19.27 Wh kg–1 with a P of 217.51 W kg–1 at 0.3 A g–1 and outstanding cycle ability of capacitance retention of 94.9% after 10000 cycles. This work paves a way to develop high-performance wearable asymmetric supercapacitors.

中文翻译:

在含非晶态氧化钴的多通道碳纳米纤维上生长的MnO 2纳米片,作为超级电容器的柔性电极

在这项研究中,通过静电纺丝技术,随后的碳化和便捷的化学浴沉积工艺,制备了在包含无定形氧化钴([电子邮件保护] 2)的多通道碳纳米纤维上生长的MnO 2纳米片。所获得的[电子邮件保护的] 2具有灵活的功能,可以用作超级电容器中的独立式电极。其结果,[电子邮件保护] 2个-2.5展品265 F G比电容-1 0.5 A G -1,这超过那些它们各自的对应(135和143 F G的-1 0.5 A G -1为[电子邮件保护] 2和CoMCNFs)。此外,在10000次循环之后,[受电子邮件保护的] 2 -2.5的比电容也保持了98.7%。最重要的是,不对称超级电容器(ASC)由[受电子邮件保护] 2 -2.5和电纺碳纳米纤维(CNFs)组装而成,它们的E高为19.27 Wh kg –1P为217.51 W kg –1在0.3 10000次循环后,g –1和出色的循环能力达到了94.9%的电容保持率。这项工作为开发高性能可穿戴非对称超级电容器铺平了道路。
更新日期:2019-11-27
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