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Wu, Honglu, Zhang, Yang, Zhang, Xudong, San Hui, Kwan 
ORCID: https://orcid.org/0000-0001-7089-7587, Zhu, Jiefang and He, Wen
(2020)
Low cost Na2FeSiO4/H–N-doped hard carbon nanosphere hybrid cathodes for high energy and power sodium-ion supercapacitors.
Journal of Alloys and Compounds, 842.
ISSN 0925-8388
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Abstract
Na2FeSiO4 (NFS)/H–N-doped hard carbon nanospheres (HN-HCNSs) hybrid cathodes have been synthesized by using ferrous gluconate as template and carbon source via sol-gel method for the first time. In the structure of this hybrid cathode, the ultrathin NFS nanosheets are uniformly anchored in the mesoporous network structure of HN-HCNSs coating, forming the fast conductive transport pathways for electrons and Na+-ions. The NFS/HN-HCNSs hybrid cathode shows a hybrid energy storage mechanism with high initial discharge capacity of 218.4 mAh g−1 at 0.1 C and in the voltage range of 1.2–4.6 V versus Na/Na+. It also shows excellent long-term cycling stability (the capacity retention rates of 73.8% at 1 C after the 3300 cycles and 56.8% at 5 C after the 750 cycles in the voltage range of 1.5–4.6 V). Moreover, the unique mesoporous carbon-coated structural features endow the hybrid cathode with a maximum energy density of 331.99 W h kg−1 and a maximum power density of 2431.87 W kg−1 within working voltage range of 1.5–4.6 V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ferrous gluconate,hybrid cathode,h–n-doped hard carbon nanosphere,mesoporous carbon-coated structure,na fesio,mechanics of materials,mechanical engineering,metals and alloys,materials chemistry ,/dk/atira/pure/subjectarea/asjc/2200/2211 |
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| Depositing User: | LivePure Connector |
| Date Deposited: | 10 Jun 2020 00:29 |
| Last Modified: | 22 Oct 2022 06:17 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/75522 |
| DOI: | 10.1016/j.jallcom.2020.155797 |
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