The nanosized ␣-Ni͑OH͒ 2 was synthesized by chemical coprecipitation in alcohol-water systems. Different contents of nanosized ␣-Ni͑OH͒ 2 were added into microscale ␤-Ni͑OH͒ 2 to form biphase electrode materials for secondary rechargeable nickel-metal hydride ͑Ni/MH͒ batteries. The electrochemical properties of the biphase Ni͑OH͒ 2 electrodes were investigated with cyclic voltammetry and galvanostatic charge-discharge tests. The biphase electrode with 10 wt % nanosized ␣-Ni͑OH͒ 2 exhibited better charge-discharge cycling stability and activity than other materials, and the discharge capacity was higher than that of the ␤-Ni͑OH͒ 2 electrode. It may be a promising positive active material for rechargeable Ni/MH batteries.

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To enhance the stability and pollutant removal performance of an aerobic granular sludge (AGS), four groups of AGS reactors with different pore sizes of mesh screen (R1 is control reactor,...

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