Graphite carbon-encapsulated metal nanoparticles derived from Prussian blue analogs growing on natural loofa as cathode materials for rechargeable aluminum-ion batteries.

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ID: 54369
2019
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Abstract
Aluminum-ion batteries (AIBs) are attracting increasing attention as a potential energy storage system owing to the abundance of Al sources and high charge density of Al. However, suitable cathode materials to further advance high-performing AIBs are unavailable. Therefore, we demonstrated the compatibility of elemental metal nanoparticles (NPs) as cathode materials for AIBs. Three types of metal NPs (Co@C, Fe@C, CoFe@C) were formed by in-situ growing Prussian blue analogs (PBAs, Co[Co(CN)], Fe[Fe(CN)] and Co[Fe(CN)]) on a natural loofa (L) by a room-temperature wet chemical method in aqueous bath, followed by a carbonization process. The employed L effectively formed graphite C-encapsulated metal NPs after heat treatment. The discharge capacity of CoFe@C was superior (372 mAh g) than others (103 mAh g for Co@C and 75 mAh g for Fe@C). The novel design results in CoFe@C with an outstanding long-term charge/discharge cycling performance (over 1,000 cycles) with a Coulombic efficiency of 94.1%. Ex-situ X-ray diffraction study indicates these metal NP capacities are achieved through a solid-state diffusion-limited Al storage process. This novel design for cathode materials is highly significant for the further development of advanced AIBs in the future.
Reference Key
zhang2019graphitescientific Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhang, Kaiqiang;Lee, Tae Hyung;Bubach, Bailey;Jang, Ho Won;Ostadhassan, Mehdi;Choi, Ji-Won;Shokouhimehr, Mohammadreza;
Journal Scientific reports
Year 2019
DOI
10.1038/s41598-019-50154-8
URL
Keywords
carbon nanotubes li-ion batteries hydrothermal synthesis microwave-assisted synthesis

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