Co 3 O 4 Supraparticle‐Based Bubble Nanofiber and Bubble Nanosheet with Remarkable Electrochemical Performance
Autor: | Zhongyou Peng, Longbin Li, Kai Yuan, Yiwang Chen, Yingbo Xiao, Yazhou Xu, Jun Huang, Licheng Tan |
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Rok vydání: | 2019 |
Předmět: |
Nanostructure
Materials science General Chemical Engineering General Physics and Astronomy Medicine (miscellaneous) Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) law.invention law General Materials Science lcsh:Science Nanosheet Supercapacitor bubble nanosheets supercapacitors Full Paper Graphene Carbon nanofiber General Engineering bubble nanofibers Full Papers 021001 nanoscience & nanotechnology 0104 chemical sciences Nanofiber Electrode Co3O4 supraparticles lcsh:Q 0210 nano-technology |
Zdroj: | Advanced Science Advanced Science, Vol 6, Iss 12, Pp n/a-n/a (2019) |
ISSN: | 2198-3844 |
DOI: | 10.1002/advs.201900107 |
Popis: | Hollow nanostructures based on transition metal oxides (TMOs) with high surface‐to‐volumetric ratio, low density, and high loading capacity have received great attention for energy‐related applications. However, the controllable fabrication of hybrid TMO‐based hollow nanostructures in a simple and scalable manner remains challenging. Herein, a simple and scalable strategy is used to prepare hierarchical carbon nanofiber (CNF)‐based bubble‐nanofiber‐structured and reduced graphene oxide (RGO)‐based bubble‐nanosheet‐structured Co3O4 hollow supraparticle (HSP) composites (denoted as CNF/HSP‐Co3O4 and RGO/HSP‐Co3O4, respectively) by solution self‐assembly of ultrasmall Co3O4 nanoparticles (NPs) assisting with polydopamine (PDA) modification. It is proved that the electrochemical performance of Co3O4 NPs can be greatly enhanced by the rationally designed nanostructure of bubble‐like supraparticles combined with carbon materials as excellent electrodes for supercapacitors. The favorable structure and composition endow the hybrid electrode with high specific capacitance (1435 F g−1/1360 F g−1 at 1 A g−1/5 mV s−1) as well as fantastic rate capability. The asymmetric supercapacitors achieve an excellent maximum energy density of 51 W h kg−1 and superb electrochemical stability (92.3% retention after 10 000 cycles). This work suggests that the rational design of electrode materials with bubble‐like superstructures provides an opportunity for achieving high‐performance electrode materials for advanced energy storage devices. |
Databáze: | OpenAIRE |
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