Zhang, Kaiqiang Lee, Tae Hyung Bubach, Bailey Jang, Ho Won Ostadhassan, Mehdi Choi, Ji-Won Shokouhimehr, Mohammadreza 2024-01-19T19:04:12Z 2024-01-19T19:04:12Z 2021-09-04 2019-09-20 2045-2322 https://pubs.kist.re.kr/handle/201004/119560 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 Al3+. 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 AlBs. Three types of metal NPs (Co@C, Fe@C, CoFe@C) were formed by in-situ growing Prussian blue analogs (PBAs, Co[Co(CN)(6)], Fe[Fe(CN)(6)] and Co[Fe(CN)(6)]) 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(-1)) than others (103 mAh g(-1) for Co@C and 75 mAh g(-1) 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. English NATURE PUBLISHING GROUP LITHIUM-ION RAMAN-SPECTROSCOPY STORAGE MECHANISM HIGH-CAPACITY INTERCALATION STATIONARY VEHICLE Graphite carbon-encapsulated metal nanoparticles derived from Prussian blue analogs growing on natural loofa as cathode materials for rechargeable aluminum-ion batteries Article 10.1038/s41598-019-50154-8 1 SCIENTIFIC REPORTS, v.9 SCIENTIFIC REPORTS 9 scie scopus 000487002100060 2-s2.0-85072514091 Multidisciplinary Sciences Science & Technology - Other Topics Article LITHIUM-ION RAMAN-SPECTROSCOPY STORAGE MECHANISM HIGH-CAPACITY INTERCALATION STATIONARY VEHICLE