通过水热法制备了纳米氧化镍，并观察了样品形貌及研究电极电化学性能。在水热合成过程加入表面活性剂，可形成疏松多孔，表面呈蜂窝状，颗粒均匀（100-200nm）的纳米氧化镍。结果表明：0.1A/g电流密度，纳米NiO电极首周期放电比容量高达2385.7 mAh/g， 100周期之后电极比容量仍然稳定于1100mAh/g。2.0A/g电流密度，电极放电比容量为600mAh/g。又调回0.1A/g电流密度，电极放电比容量仍可恢复至1050mAh/g。该电极有优异的循环寿命和倍率性能。

In this work, the nano-NiO material was prepared by hydrothermal method. The surface morphologies and electrochemical properties of nano-NiO material were investigated. The special nano-NiO material with porous surface assembling honeycombs(100-200nm) was obtained by using surface active agents. The discharge capacity of nano-NiO electrode up to 2385.7 mAh/g was achieved at current density of 0.1A/g in the first circle,while 1100mAh/g could be maintained after 100 circles. At current density of 2.0A/g, the discharge capacity of 600 mAh/g was obtained. And when the current density was reduced to 0.1A/g, the discharge capacity was restored to 1050 mAh/g. The nano-NiO electrode exhibited excellent cycling performance and rate capability.