Hydrogen storage properties of La1.8Ti0.2MgNi9–xCox (x = 0, 0.1, 0.3, 0.5) alloys
- Autores: Jiang W.1,2,3, Guo J.1, Cao S.1
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Afiliações:
- College of Physics Science and Technology
- Guangxi Experiment Centre of Science and Technology
- Guangxi Key Laboratory for Relativistic Astrophysics
- Edição: Volume 52, Nº 5 (2016)
- Páginas: 435-440
- Seção: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/187856
- DOI: https://doi.org/10.1134/S1023193516050141
- ID: 187856
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Resumo
La1.8Ti0.2MgNi9–xCox (x = 0, 0.1, 0.3, 0.5) alloys were prepared by magnetic levitation melting under argon atmosphere. The effects of Co substitution on the phase structure and the hydrogen storage properties of the alloys were investigated. The results show that LaNi5 and LaMg2Ni9 phases are contained in all experimental alloys. LaNi3 phase disappears and LaNi2 phase appears as x ≥ 0.1 and x ≥ 0.3, respectively. Electrochemical performances have been improved after Co substitution for Ni, for example, the discharge capacity and the high rate dischargeability (HRD) reach the maximum at x = 0.1, and the optimum cycling stability is obtained at x = 0.5. The positive impact of Co on the hydrogen diffusion rate in bulk enhances the HRD, but to high Co content (x ≥ 0.3), the unsatisfied hydrogen desorption capability brings relative low HRD compared with the alloy electrode at x = 0.1.
Sobre autores
Weiqing Jiang
College of Physics Science and Technology; Guangxi Experiment Centre of Science and Technology; Guangxi Key Laboratory for Relativistic Astrophysics
Autor responsável pela correspondência
Email: wqjiang@gxu.edu.cn
República Popular da China, Nanning, 530004; Nanning, 530004; Nanning, 530004
Jin Guo
College of Physics Science and Technology
Email: wqjiang@gxu.edu.cn
República Popular da China, Nanning, 530004
Shilong Cao
College of Physics Science and Technology
Email: wqjiang@gxu.edu.cn
República Popular da China, Nanning, 530004