材料期刊网

A water/oil two-phase solution strategy has been developed for the synthesis of various β-Co(OH)2 nanostructures.More importantly,two different morphologies of β-Co(OH)a:mesoporous nanowafers and nanohexagons were successfully obtained through one reaction.Furthermore,the special mesoporous of βCo(OH)2 nanowafers and nanohexagons exhibited excellent electrochemical hydrogen storage capacities and cycling stability.The maximum capacity reached 265.9 and 215.7 mA h g-1 at room temperature,respectively.After 70 cycles,the discharging capacities of the electrode still remain above 218.2 and 175.4 mA h g-1,which indicates that the as-prepared mesoporous β-Co(OH)2 nanowafers have a strong resistance against oxidation and corrosion.These results indicates that the mesoporous β-Co(OH)2 nanowafers and nanohexagons may be potentially applied for electrochemical hydrogen storage.