It was noted that β-Nickel hydroxide comprised a long wide periodic arrangement

of atoms with the stacking sequence, AC AC AC, having the ideal composition,

Ni(OH)2. Variations in the preparation conditions could lead to changes in the

stacking sequence (AC AC BA CB AC AC or AC AC AB AC AC). This type of

variation in stacking sequence could result in the formation of stacking faults in

nickel hydroxide. The stability of the stacking fault depended upon the free energy

content of the sample. Stacking faults in nickel hydroxide were essential for a

better electrochemical activity. There were also signs that particle size was related

to better electrochemical activity. The effect of crystallite size upon faulted nickel

hydroxide samples was determined here. The electrochemical performance of

faulted nickel hydroxide with a small crystallite size involved exchanges of

0.8e/Ni, while samples with a larger crystallite size involved exchanges of 0.4e/Ni. Crystallite Size Effects in Stacking Faulted Nickel Hydroxide and Its

Electrochemical Behaviour. T.N.Ramesh: Materials Chemistry and Physics, 2009,

114[2-3], 618-23