The higher reversible discharge capacity exhibited by beta(bc) (bc: badly c
rystalline)-nickel hydroxide (400 mAh g(-1) of Ni; theoretical: 456 mAh g(-
1)) compared to that of beta-nickel hydroxide (180 mAh g(-1)) can be attrib
uted to the presence of regions characterized by turbostratic disorder in t
he former. These regions comprise the alpha-modification of nickel hydroxid
e existing in an inter-stratified form within the beta(bc) sample. The a-mo
tifs in the beta(bc) are anion-free, but hydrated, by virtue of which beta(
bc)-nickel hydroxide exhibits a higher water content (11% by weight) compar
ed to the beta-form (<1%). (C) 2000 The Electrochemical Society. S0013-4651
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