Wong, Christelle Pau Ping and Lai, Chin Wei and Lee, Kian Mun and Pan, Guan Ting and Huang, Chao Ming and Juan, Joon Ching and Yang, Thomas Chung Kuang (2022) Enhancement of discharge capacity and energy density by oxygen vacancies in nickel doped SrTiO3 as cathode for rechargeable alkaline zinc battery. Electrochimica Acta, 404. ISSN 0013-4686, DOI https://doi.org/10.1016/j.electacta.2021.139705.
Full text not available from this repository.Abstract
Rechargeable alkaline zinc batteries (RAZBs) are promising aqueous battery due to the advantages of Zn metal as the anode. Although the Zn anode is low cost, non-toxic, and intrinsic safety, the use of metal oxide cathode suffers from poor discharge capacity and energy density in RAZBs. The preparation of Nickel doped SrTiO3 (Ni-STO) as cathode has successfully improved the performance of RAZBs up to 596 mAh cm(-3) (2 mA cm(-2)) with energy density of 68 mWh cm(-3). The discharge capacity is remarkability enhanced by 54% as compared to that of pristine STO as cathode. This proven that the formation of oxy-gen vacancies ( V o spacing diaeresis ) after doped with nickel play an important role. The creation of V o spacing diaeresis enable more charge storage sites and also improve the electric conductivity which facilitates the diffusion of ions/electrons. Based on the charge-transfer resistance, the electrical conductivity of Ni -STO has improved 79% from the 7.8 to 1.6 omega. This outstanding performance of Ni-STO as cathode has benefited RAZBs. (C) 2021 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya [Grant No: GC002A-15SBS; PV029-2017; RU001-2020], Institute of Research Management & Services (Student Fi-nancial Aid 2019), National Taipei University of Technology-University of Malaya Joint 5 Research Program [Grant No: NTUT-UM-109-02] |
| Uncontrolled Keywords: | Nickel; SrTiO3; Rechargeable alkaline zinc battery; Oxygen vacancies; Hydrothermal |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 18 Sep 2023 01:14 |
| Last Modified: | 18 Sep 2023 01:14 |
| URI: | http://eprints.um.edu.my/id/eprint/43054 |
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