Physical characterization, electrochemical performance and storage stability of spherical Al-substituted γ-NiOOH

Spherical Al-substituted γ-NiOOH as an individual positive electrode material for a new type of alkaline primary/rechargeable Zn-NiOOH battery was prepared by the chemical oxidation of spherical Al-substituted α-Ni(OH) 2. The spherical Al-substituted γ-NiOOH was characterized by XRD, SEM, FT-IR, TGA...

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Bibliographic Details
Published in:Electrochimica acta 2007, Vol.52 (5), p.2109-2115
Main Authors: Fu, Xian-Zhu, Wang, Xing, Xu, Qing-Chi, Li, Jun, Xu, Jeff-Qiang, Lin, Jing-Dong, Liao, Dai-Wei
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemical performance
Exact sciences and technology
Physical characterization
Spherical Al-substituted α-Ni(OH) 2
Spherical Al-substituted γ-NiOOH
Storage stability
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Summary:Spherical Al-substituted γ-NiOOH as an individual positive electrode material for a new type of alkaline primary/rechargeable Zn-NiOOH battery was prepared by the chemical oxidation of spherical Al-substituted α-Ni(OH) 2. The spherical Al-substituted γ-NiOOH was characterized by XRD, SEM, FT-IR, TGA-DTG, TPD-MS and HT-XRD. The tap density and average nickel oxidation state were measured. Its electrochemical performance and storage stability were also investigated. The results show that the as-prepared spherical Al-substituted γ-NiOOH has remarkably higher specific discharge capacity and superior storage stability in alkaline electrolyte compared to spherical β-NiOOH.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2006.08.021