Synthesis of Nickel Hydroxide Nanoribbons with a New Phase:  A Solution Chemistry Approach

We report here the successful synthesis of one-dimensional (1D) nanoribbons of nickel hydroxide crystallized in a new phase. This attempt is based on the treatment of freshly precipitated nickel hydroxide with high concentrations of nickel sulfate. The nanoribbons with monoclinic structure had a chemical composition of Ni(OH) 1.66 (SO 4 ) 0.17 (H 2 O) 0.29, which was close to that of α-Ni(OH) 2 . These nanoribbons were very pure single crystals, structurally uniform with typical widths of 5−25 nm, thicknesses of 1−5 nm, and lengths of up to a few micrometers, and could be an ideal system for studying the physical and chemical properties of 1D nanostructured electrode materials.