Durability of nickel-metal hydride (Ni-MH) battery cathode using nickel-aluminum layered double hydroxide/carbon (Ni-Al LDH/C) composite

We report the durability of the optimized nickel-aluminum layered double hydroxide/carbon (Ni-Al LDH/C) composite prepared by liquid phase deposition (LPD) as cathode active materials in nickel metal hydride (Ni-MH) secondary battery. The positive electrode was used for charge-discharge measurements...

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Veröffentlicht in:Journal of power sources 2014-02, Vol.247, p.572-578
Hauptverfasser: ALEXIS BIENVENU BELEKE, HIGUCHI, Eiji, INOUE, Hiroshi, MIZUHATA, Minoru
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Sprache:eng
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Zusammenfassung:We report the durability of the optimized nickel-aluminum layered double hydroxide/carbon (Ni-Al LDH/C) composite prepared by liquid phase deposition (LPD) as cathode active materials in nickel metal hydride (Ni-MH) secondary battery. The positive electrode was used for charge-discharge measurements under two different current: 5 mA for 300 cycles in half-cell conditions, and 5.8 mA for 569 cycles in battery regime, respectively. The optimized Ni-Al LDH/C composite exhibits a good lifespan and stability with the capacity retention above 380 mA h gcomp-1 over 869 cycles. Cyclic voltammetry shows that the alpha -Ni(OH)2/ gamma -NiOOH redox reaction is maintained even after 869 cycles, and the higher current regime is beneficial in terms of materials utilization. X-ray diffraction (XRD) patterns of the cathode after charge and discharge confirms that the alpha -Ni(OH)2/ gamma -NiOOH redox reaction occurs without any intermediate phase.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2013.08.001