Table 2.

Representative values from the literature for the precipitation of β-nickel hydroxide materials having various Ni structures, prepared at different pH values.

pH	Electrochemically Formed Ni Structure
2.9	Ni2+
4.9	Ni2+
5.4	Ni2+
8.4	Ni(OH)2 + NiO + Ni2+
14	Ni(OH)3−