Abstract
We have found that the [Ni4Al(OH)10]OH transforms into β-Ni(OH)2, because Al3+ ions are leached out into the electrolyte to form Al(OH) −4 . From thermodynamic point of view, Al(OH) −4 may retard the structural transformation, and it is directly supported by experiments on [Ni4Al(OH)10]OH soaked in the electrolyte containing at 60°C. Constant potential polarizations show the electrolyte containing Al(OH) −4 at 60°C. Constant potential polarizations show the electrolyte containing Al(OH) −4 can suppress the oxygen evolution at higher electrode potentials. The existence of Al(OH) −4 in the electrolyte can obviously improve the charge/discharge performances under the current density of 1000 mA g−1 at 60°C.
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Published in Russian in Elektrokhimiya, 2014, Vol. 50, No. 12, pp. 1319–1324.
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Ren, F., Hu, M., Gao, X.R. et al. Effects of Al(OH)3 into alkali solution on high-temperature performances of a layered double hydroxide, [Ni4Al(OH)10]OH. Russ J Electrochem 50, 1182–1186 (2014). https://doi.org/10.1134/S1023193514100085
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DOI: https://doi.org/10.1134/S1023193514100085